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Tech Lead Jobs in London
Overview
Looking for top Tech Lead jobs in London? Discover the best opportunities on Haystack, the leading IT job board connecting skilled tech professionals with innovative companies in the heart of London. Find your next leadership role in software development, engineering management, and technology strategy today!
Azure Integration Developer
Comtecs Ltd
London
Hybrid
Senior - Leader
£80,000 - £85,000
RECENTLY POSTED
+1

Azure Integration Developer/Integration Engineer - Azure Integration Services (AIS), C#, ASP.NET Core Net, SQL, Blazor, ADF, Azure Logic Apps. Permanent, London, (Hybrid 3/2), £80k - £85k +Bonus +Benefits

Azure Integration Developer/Integration Engineer/C# Developer required to work on the config, deployment and support of multiple enterprise systems integrated within the Azure cloud environment for this global organisation.

You will provide expertise in the design, architecture and development of Azure integrations primarily utilising AIS (Azure Integration Services) including optimising enhancement with the MDM platform and integrating data via ADF albeit in conjunction with ETL developers.

Working in an SME/Lead capacity you will:

  • Liaise with other technical teams, vendors and wider business stakeholders
  • Design, config and deploy application integrations within the AIS framework
  • Undertake hands-on integration work utilising a range of tools including C#, .NET Core, Blazor/Javascript, ADF, SQL etc
  • Undertake integration of low-code apps developer in Azure Logic Apps
  • Work with Agile/Scrum methods, leading ceremonies inc Sprint Planning and retros
  • Maintain change and version control documentation as required

We are searching for an Azure Integration Developer/Integration Engineer/C# Developer/.NET Core Developer who has been working within professional services environments such as Banking, Financial Services, Legal Services, Accountancy or from within a Big 4 consultancy such as PwC. KPMG, EY, Deloitte and can demonstrate:

  • Expert level experience with Azure Integration Services (AIS) and the integration of multiple enterprise-systems within the Azure Integration ecosystem
  • Hands-on development expertise with a range of relevant Azure Engineering tools inc C#, .NET Core, Blazor/JavaScript/Typescript, SQL, ADF, Azure Service Bus
  • Experience integrating native ASP.NET Core/C# applications, 3rd party systems (Document Management, Finance, HCIM such as Workday etc) and Low Code apps built in MSFT Logic Apps
  • Experience leading development engineering work within a professional services environment
  • Knowledge of Agile/Scrum methods with exposure to roles such as Scrum Master, Product Owner etc (non-essential)
  • Ability to communicate effectively with a wide range of stakeholders

Solid opportunity to work across a number of integrations within a large-scale Azure environment integrating multiple systems (eg, CRM, ERP, Finance, HCIM, Document Management as well as external APIs) designing event-driven architectures and handling data transformation between systems for a high-profile company within their field.

Tech Lead / Senior Full Stack Developer
Tate
London
Hybrid
Senior
£75,000 - £85,000
RECENTLY POSTED

Senior Full Stack Developer / Tech Lead Hands‑on | Mission‑led organisation | Remote‑first Remote first, with onsite days in London 1-2 times per month 35‑hour working week, 10% pension 18-24 month FTC, with potential to go permanent £70,000-£85,000 We are looking for a hands‑on engineer who can lead from the front while shaping long‑term technical strategy. The organisation has recently completed a digital transformation, including a new website. A CRM migration is about to begin, and new tools and platforms will be built, including the use of AI to scale impact. Your work will directly shape the organisation's internal technical capability and the long‑term technical roadmap for a national advisory service. This is a mission‑driven, government‑funded organisation providing essential services to large numbers of people with leasehold properties across the UK, Wales, and Scotland. What You'll Be Doing Setting the technical direction of the organisation Taking ownership of a greenfield technical environment Building and leading a small engineering team Guiding architectural decisions while remaining hands‑on Influencing product strategy and contributing to the roadmap Why Join? Greenfield work: build tools and systems from the ground up Mission‑led: your work will directly benefit people across the UK Strategic influence: shape the entire technical roadmap Grow a team: opportunity to hire and lead your own engineering team Modern technical landscape: work with current tools and cloud technologies Requirements Strong hands‑on experience with Python (Django) Front‑end experience with JavaScript (React or Vue) Experience with relational databases Experience or exposure to Heroku Exposure to Azure or other cloud platforms Experience working in a small company (<50 people) Comfortable working in small, adaptable environments Prior experience leading teams and setting technical direction Experience building an engineering team Experience integrating AI APIs into products Wagtail CMS experience is a nice to have Please note you must be based in the UK and have full right to work in the UK. Please be aware this advert will remain open until the vacancy has been filled. Interviews will take place throughout this period, therefore we encourage you to apply early to avoid disappointment. Tate is acting as an Employment Business in relation to this vacancy. Tate is committed to promoting equal opportunities. To ensure that every candidate has the best experience with us, we encourage you to let us know if there are any adjustments we can make during the application or interview process. Your comfort and accessibility are our priority, and we are here to support you every step of the way. Additionally, we value and respect your individuality, and we invite you to share your preferred pronouns in your application

Salesforce Tech Lead
Arm
London
Hybrid
Senior
£600/day - £630/day
RECENTLY POSTED

6-Month contract - Inside IR35 - up to £630 per day London based - hybrid working - 2/3 days on site Must either have current NPPV3 or held previously Clearance NPPV3 clearance is required. Candidates must confirm whether they currently hold, or are willing to undergo, NPPV3 clearance, and provide confirmation of any current or previous SC clearance. Summary Salesforce Tech Lead / Lead Developer with 5+ years' experience delivering complex, production‑quality Salesforce solutions across the full development lifecycle, from discovery and design through build, test, deployment, and live support. Ideally experienced in public sector delivery, operating within structured governance, assurance, and security constraints, and comfortable working within Agile delivery models. A strong communicator and engineering leader, capable of engaging effectively with technical and non‑technical stakeholders, translating business requirements into clear technical solutions, and providing accurate estimates, delivery forecasts, and clear status updates throughout the lifecycle. Highly motivated with a proactive problem‑solving mindset, able to identify issues early, drive resolution, and actively manage technical and delivery risks to protect quality, timelines, and outcomes. Demonstrates a strong personal commitment to engineering excellence, code quality, and continuous improvement. Hands‑on contributor with a proven track record of leading by example, supporting design elaboration, conducting peer reviews, mentoring junior developers, and driving consistent standards across teams and environments. Key Responsibilities & Capabilities Engineering Leadership & Delivery Lead and contribute to the design and build of scalable, secure Salesforce solutions, ensuring alignment to architectural standards and best practices. Provide clear technical leadership, supporting solution design, breaking down complex requirements, and guiding implementation approaches. Own and contribute to accurate estimation of development effort, proactively managing dependencies, assumptions, and delivery risks. Maintain clear and timely communication with delivery leads, product owners, and stakeholders, providing progress updates, risks, and mitigation actions.Quality & Problem Solving Drive a strong quality‑first engineering culture, ensuring solutions are well‑designed, testable, maintainable, and production‑ready. Identify and resolve technical issues early, escalating risks appropriately and proposing pragmatic, value‑focused solutions. Actively contribute to peer code reviews, ensuring consistency, performance, security, and maintainability standards are met. Support continuous improvement of development practices, tooling, and ways of working. Collaboration & Mentoring Work closely with architects, testers, Dev/DevOps, and product teams to ensure end‑to‑end delivery success. Mentor and guide junior team members, supporting skills development, knowledge sharing, and technical confidence. Contribute positively to Agile ceremonies, design workshops, and planning sessions, helping teams deliver predictably and transparently. Specific Skills & Experience Sought Salesforce core configuration, including objects, fields, validation rules, sharing rules, and Lightning page layouts Salesforce Service Cloud configuration Experience Cloud site design and build Advanced Flow (low‑code) design and optimisation Confident working with Apex (pro‑code) to extend platform capability where appropriate Familiarity with custom Lightning Web Component (LWC) development Experience with unmanaged packaging and SFDX / Git‑based source control, including deployment across multi‑sandbox environmentsDisclaimer: This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited ("ARM"). ARM is a specialist talent acquisition and management consultancy. We provide technical contingency recruitment and a portfolio of more complex resource solutions. Our specialist recruitment divisions cover the entire technical arena, including some of the most economically and strategically important industries in the UK and the world today. We will never send your CV without your permission. Where the role is marked as Outside IR35 in the advertisement this is subject to receipt of a final Status Determination Statement from the end Client and may be subject to change

Flight Software Team Lead
HAYS
London
Hybrid
Senior
£100,000

Your new company

My client is a global leader in Aerospace and Spacecraft development. You will play a key role in shaping the future of trajectory planning and optimisation by introducing innovative concepts and delivering streamlined interfaces that give Operations team clear, intuitive access to all information related to the spacecraft’s environment - including interactions with nearby objects.
In this role, you will work across a diverse range of orbital regimes and mission scenarios. Your involvement will span the entire operational lifecycle, from routine mission phases to complex activities such as rendezvous, docking and separation with both active and passive clients. You will contribute to the full development chain of the Flight Dynamics suite - from design and implementation through testing and operational deployment - while collaborating closely with multidisciplinary teams across the globe.

Your new role

  • Help define and review the flight dynamics requirements for missions.
  • Be the interface with contractors’ teams that are developing the flight dynamics products.
  • Participate in the design of the Flight Dynamics group architecture for missions.
  • Develop mathematically intensive software for specific flight dynamics modules developed in-house.
  • Take responsibility in the space traffic management processes: conjunction warning assessment, and collision avoidance manoeuvre planning, execution and evaluation.
  • Plan, support the execution of and evaluate the performance of spacecraft orbital and attitude manoeuvres.
  • Support the design of the Ground Segment concept of operations (wrt flight dynamics systems).
  • Support the spacecraft operations team.
  • Perform required mission and system analysis studies, preparation of technical notes and attendance at technical meetings.
  • Review of spacecraft and ground-segment technical documentation and participation in formal reviews.
  • Support spacecraft operations engineering activities as required.
  • Perform routine and critical real-time operations.
  • Participate in training and execution of relative navigation processes, from the pre-launch phase to rendezvous, inspection and capture phases.
  • Develop, validate and maintain nominal and contingency mission operations procedures (automated & manual).
  • Investigate spacecraft anomalies and participate in the anomaly resolution process.
  • Interface internally / externally as required in support of operations activities, and ensure all relevant information is formatted and disseminated appropriately.
  • Participate in 24/7 shifts (for mission phases) and on-call rotations, such that safe and efficient operations are ensured on a 24/7 basis.

What you’ll need to succeed

  • University degree in aeronautics, computer science, software engineering, mathematics or relevant science discipline.
  • 5 years commercial space flight dynamics experience
  • Excellent knowledge of orbital mechanics & flight dynamics
  • Experience in using simulation software MATLAB or similar
  • Experience with Mission Analysis & requirements definition
  • Fluent in spoken and written English language
  • Experience in flight dynamics operations & agile methodology
  • Experience using C++, Python, and scripting & basic knowledge of Linux
  • Experience in regression testing and version control
  • Education or experience in Guidance, Navigation and Control
  • Education or experience in image processing and object reconstruction methods
  • Familiarity with Flight Dynamics design architecture

What you’ll get in return
Competitive base salaryOpportunity to work with a highly talented, diverse & dynamic international team with cutting edge technologyFlexible working around core hours in a friendly and supportive environment Optional 9/75 working patternHybrid working available (dependent on individual role requirements)25 days holiday (increasing yearly up to a maximum of 28 days) + 8 days Bank HolidayLife insurance and long-term sick payPrivate healthcare (taxable benefit)Relocation allowanceVisa sponsorship for employees consideredState of the art office and cleanroom facilityRegular social events

Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C’s, Privacy Policy and Disclaimers which can be found at hays.co.uk

C++ Lead / Engineering Manager - Systematic Trading
McGregor Boyall Associates Limited
London
Hybrid
Senior
£100,000

Location: London or Amsterdam
Industry: Systematic Trading / Hedge Funds
Work model: Hybrid

Overview:
A leading systematic trading environment is looking to hire a hands-on C++ Engineering Manager to work on business-critical trading systems in a live market environment.

This role is suited to someone operating at lead or manager level who still enjoys being close to the code. The focus is on building and improving low-latency, production trading systems across systematic trading, automated trading, and execution. You will work closely with traders, quants, and engineers to deliver robust technology with direct impact on trading performance.

Responsibilities:

  • Lead the design and development of core trading and execution systems in modern C++
  • Build and enhance low-latency infrastructure used across systematic trading and execution
  • Work closely with traders, researchers, and senior engineers to turn ideas into production capability
  • Improve architecture across market data, execution, connectivity, and performance-critical components
  • Drive technical quality, scalability, and reliability across live trading systems
  • Contribute directly to coding, design decisions, optimisation, and system evolution
  • Support and mentor engineers while helping raise the bar technically

Experience:

  • Strong hands-on C++ engineering experience in Linux-based trading environments
  • Track record of building or owning low-latency, high-performance systems used in production
  • Good understanding of market microstructure, market data, and execution workflows
  • Experience working closely with traders, quants, or researchers in fast-paced environments
  • Previous exposure to market making, HFT, or top-tier hedge fund platforms strongly preferred

Compensation:

Structured to attract high-calibre talent, with strong base, bonus, and benefits.

McGregor Boyall is an equal opportunity employer and do not discriminate on any grounds.

Senior Software Engineer
Low Carbon Contracts Company
Multiple locations
Hybrid
Senior
£85,000
+1

Contract type: Permanent Hours: 37.5/ week Salary: circa £84,000 depending on experience Location: London, Canary Wharf WFH policy: Employees are required to attend the office 2 days/week Flexible working : Variety of flexible work patterns subject to line manager discretion e.g. Compressed 9-day fortnight. Reports to: Software Engineering Manager Deadline Note: We reserve the right to close the advert before the advertised deadline if there are a high volume of applications. Role Summary: Were looking for a Senior Software Engineer to join our Settlement Systems team, part of a broader engineering space that delivers critical systems to help the UK achieve Net Zero by 2050. Our digital platform underpins multiple applications, including settlement tools, forecasting engines, calculation services, and data portals that enable the business to meet this ambitious goal. As a technical leader, you will collaborate with Senior Software Engineers to define system architecture, mentor team members, and champion engineering best practices, while remaining actively involved in hands-on development. Although this role does not include direct line management, it requires strong technical leadership and the ability to guide the team through complex challenges. Key Responsibilities Design, develop, and maintain scalable and reliable software solutions, ensuring alignment with Principals and Architects.

Collaborate with cross-functional teams, including Product, QA, and DevOps, to deliver high-quality features.

Lead code reviews and technical discussions, and contribute to architectural decisions.

Lead complex coding tasks; ensure code quality

Identify and resolve performance and scalability issues.

Write clean, maintainable, and well-documented code.

Mentor and support junior and mid-level engineers.

Stay current with emerging technologies and industry trends.

Estimate work; lead delivery of features from the roadmap.

Solve ambiguous problems with scalable solutions.

Skills Knowledge and Expertise Essential: Strong expertise in Python web development frameworks (e.g., Django) and JavaScript/TypeScript, with experience working in cloud environments such as AWS, Azure, or GCP.

Skilled in applying software technical design principles to build scalable, secure, and maintainable solutions within modern cloud-based architectures.

Bachelors or Masters degree in Computer Science, Engineering or equivalent experience.

Experience with CI/CD tools and practices.

Strong problem-solving & communication skills

Adaptability/willingness to learn (e.g., Agile)

Technical leadership (mentoring, best-practice guidance)

Desirable: Experience with modern frameworks and libraries (e.g., React, Node.js, Terraform, Celery)

Experience with database schema design and query optimisation

Employee Benefits As if contributing to and supporting work that makes life better for millions wasnt rewarding enough, we offer a full range of benefits too. Key benefits that may be available depending on the role include: Annual performance based bonus, up to 10%

25 days annual leave, plus eight bank holidays

Up to 8% pension contribution

Financial support and time off for study relevant to your role, plus a professional membership subscription

Employee referral scheme (up to £1500), and colleague recognition scheme

Family friendly policies, including enhanced maternity leave and shared parental leave

Free, confidential employee assistance, including financial management, family care, mental health, and on-call GP service

Three paid volunteering days a year

Season ticket loan and cycle to work schemes

Family savings on days out and English Heritage, gym discounts, cash back and discounts at selected retailers

Employee resource groups

About Low Carbon Contracts Company The Low Carbon Contracts Company (LCCC) exists to help decarbonise the generation of electricity and make it more affordable for the future. Our work is central to the delivery of the Governments objective to achieve Net Zero target by 2050.

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Lead MuleSoft Developer
Alexander Edward James Consulting Limited
London
Fully remote
Senior
£70,000

Remote based position Responsibilities: Lead the design and development of RESTful and SOAP APIs using MuleSoft Anypoint Platform, applying API-led connectivity principles (System, Process, Experience layers). Own and deliver complex Mule flows integrating cloud and on-premises applications, databases, and third-party systems, providing technical leadership and guidance to other developers. Define and implement robust error handling, logging, monitoring, and security best practices across MuleSoft applications. Collaborate closely with architects, analysts, and stakeholders to translate business requirements into scalable, enterprise-grade integration designs. Provide technical leadership on MuleSoft runtime configuration and management, including CloudHub, Runtime Fabric, and on-premises environments. Oversee the development and governance of APIs, documentation, and reusable assets within Anypoint Exchange. Establish and enforce best practices for unit testing using MUnit, ensuring high test coverage and quality standards. Lead deployment strategies and contribute to the design and optimisation of CI/CD pipelines. Provide BAU support (2030% of time), including leading incident resolution, delivering hotfixes, and conducting root cause analysis within agreed SLAs. Actively participate in Agile delivery, mentoring team members and driving best practices across cross-functional teams. What We're Looking For 5+ years MuleSoft development experience with proven experience operating in a senior or lead capacity. Extensive experience developing integrations using MuleSoft Anypoint Platform (Mule 4.x preferred). Strong experience integrating with databases (e.g. Oracle, SQL/NoSQL), enterprise systems, and cloud platforms (e.g. AWS, Azure). Deep understanding and hands-on experience implementing security protocols such as OAuth 2.0, JWT, and SSL/TLS. Proven experience leading unit testing practices using MUnit and contributing to mature CI/CD pipelines. MuleSoft Certified Developer Level 1 minimum (Level 2 or Architect certifications advantageous). Technical Skills Expert understanding of API-led connectivity, RESTful services, RAML/OAS specifications, and enterprise integration design patterns. Advanced experience using DataWeave for complex data transformation. Strong hands-on experience with Anypoint Studio, Design Centre, and Runtime Manager. Deep knowledge of API security best practices and governance. Ability to lead and collaborate effectively within cross-functional teams, influencing technical direction. Agentic / Automation Skills Experience leading or contributing to automation-driven or agent-based solutions, including multi-agent orchestration or advanced integration of intelligent systems.

Integration Developer - Technical Lead
Morgan Philips Specialist Recruitment
London
Hybrid
Senior
£90,000 - £110,000
+3

Integration Developer - Technical Lead London Hybrid Are you an experienced Integration Developer ready to step into a Technical Lead role where you can shape modern engineering practices, influence architectural direction, and deliver high-impact solutions across a globally recognised consumer brand. We are recruiting for a hands-on, technically strong Integration Developer / Tech Lead to join a growing engineering team and play a key role in transforming a modern digital and operational technology landscape.About the Role As the Integration Developer Technical Lead, you will be responsible for designing, developing, and leading the delivery of integration solutions that connect core business systems, digital products, data services, and cloud platforms. You will own end-to-end integration architecture, champion modern engineering standards, and guide engineers through best practices in API design, cloud-native development, and scalable integration patterns. This is a hands-on leadership role, ideal for someone who enjoys coding, problem-solving, and steering technical direction while mentoring engineers and collaborating with product, data, and platform teams.What You’ll Be Doing

  • Lead the design, development, and delivery of integration solutions across a diverse technology ecosystem
  • Develop secure, scalable APIs, services, and messaging-based integrations
  • Champion best practices in engineering, DevOps, automation, testing (TDD) and CI/CD
  • Work closely with architects, digital product and design team, and stakeholders to define integration strategy
  • Provide technical leadership, supporting developers through coaching and code reviews
  • Contribute hands-on to development using modern .NET, cloud, and database technologies
  • Influence and shape cloud-based integration modernisation (Azure preferred)
  • Troubleshoot complex integration issues, ensuring performance, reliability, and data quality
  • Support documentation, standards, and governance for integration patterns
  • Play a key role in solution design for business and digital transformation initiatives

We’re looking for someone passionate about engineering, integration design, and leading by example. You’ll thrive here if you’re proactive, collaborative, and comfortable working across multiple systems in a fast-paced environment.Essential skills and experience:

  • Strong background in C# / .NET, API development, and integration technologies
  • Experience designing and delivering integrations using RESTful services, messaging, or service bus patterns
  • Solid understanding of SQL Server, T-SQL, and database performance optimisation
  • Experience working with Azure (Functions, Service Bus, Logic Apps, AKS, or related services)
  • Hands-on experience with CI/CD pipelines, DevOps tooling, automation and testing
  • Ability to lead technical discussions, coach developers, and set engineering standards
  • Experience working in Agile environments

Nice to have:

  • Containerisation experience (Docker, Kubernetes)
  • Nice to have messaging integration experience with Kafka or RabbitMQ
  • Exposure to event-driven architectures
  • Experience integrating systems within membership, retail, leisure, or consumer-facing industries
  • Security, identity, or enterprise authentication experience

This is a permanent role based in London with a hybrid working model of two to three days in the office based in central London. Salary range £90,000-£110,000.

Please note you will receive an automated response advising you that we have received your CV.

Morgan Philips Group is a global talent solutions business that disrupts conventional thinking in executive search, recruitment and talent consulting. We operate in over 18 markets in Europe, North & South America, Asia, and the Middle East & Africa. We understand that the future is digital and social, so we embrace the latest technology, including video ads and CVs, as well as social recruiting. Our innovative services are tailored to the new world of work yet we do not lose sight of the fact that employees be they existing and potential are ultimately human beings.

We are committed to ensuring that all job applicants are treated equally, without discrimination because of gender, sexual orientation, marital or civil partner status, gender reassignment, race, colour, nationality, ethnic or national origin, religion or belief, disability or age.

Senior WMS Developer
VIQU IT
London
Hybrid
Senior
£60,000 - £70,000

Senior WMS Developer Blue Yonder / JDA Flexible Location (Anywhere in the UK Hybrid) £60,000 - £70,000 VIQU is recruiting a Senior WMS Developer to join a leading distribution organisation, working on a recently implemented Blue Yonder (JDA) WMS. This is a hands-on, senior technical role where you ll own WMS development, integrations, and enhancements, mentor junior team members, and bridge a critical technical gap. Key Responsibilities Develop and deliver Blue Yonder WMS customisations and integrations, design reports, interfaces, and data extracts using SQL. Lead on solution design, code quality, and best practice. Support system enhancements, upgrades, and configuration within the MOCA architecture. Provide 2nd/3rd line support and collaborate with infrastructure, DevOps, and operations teams. Drive continuous improvement across warehouse processes. Key Requirements Strong experience with Blue Yonder / JDA WMS, MOCA, Page Builder, Integrator, and SQL development. Solid understanding of database architecture (Oracle or SQL Server) and Linux environments. Experience with integrations (SFTP, APIs, web services, message-based systems) and Git. Desirable: .NET / C#, Java, Centiro or other CMS, ServiceNow/ITSM tools, Agile/DevOps experience, ITIL/change management awareness. Additional Information Flexible hybrid working candidates from anywhere in the UK can be considered. Recently implemented WMS with significant scope for development and enhancement. Opportunity to act as the senior technical lead within the team. To apply: Reach out to Phoebe Rees via the VIQU website or LinkedIn. Referral bonus up to £1,000 (T&Cs apply).

React Front End Developer - London, UK (Fully Onsite)
Randstad Technologies Recruitment
London
In office
Senior - Leader
£300/day - £365/day

Role: React Front End Developer
Type: Contracts (8 Months)
Location: London, UK
Working Model: Fully Onsite Initially (5 Days in Office)

The Must-Haves:

  • Advanced proficiency in React.js.
  • Ability to act as a subject matter expert, manage the team to perform effectively, and take responsibility for team decisions.
  • Proven experience developing custom software solutions using modern frameworks and agile practices.
  • Capability to take full ownership of specific software components and ensure their performance meets project standards.
  • Strong problem-solving skills to provide solutions within your immediate team and across multiple cross-functional teams

This is an urgent vacancy with a deadline where the hiring manager is shortlisting for an interview immediately. Please apply with a copy of your CV or send it praveen. Com

Randstad Technologies is acting as an Employment Business in relation to this vacancy.

Lead ML Engineer (SageMaker)
Teksystems
London
Hybrid
Senior
Private salary

Job Title: Lead Machine Learning Engineer (SageMaker, MLOps, Explainability)
Job Description

We are seeking an experienced Lead Machine Learning Engineer to design, build, and productionise machine learning models for our innovative matching platform. You will work across the entire ML life cycle, from feature engineering to deployment automation, ensuring the optimisation and explainability of inference processes. Collaborating closely with data scientists and product teams, your role will focus on enhancing MLOps practices, ensuring high standards of security, performance, and compliance.

Responsibilities

  • Build and maintain scalable feature pipelines within data lakehouse architectures.
  • Develop fallback feature flows and implement robust data quality checks.
  • Develop ranking, scoring, and entity-similarity models for the matching platform.
  • Use modern ML model frameworks such as PyTorch, TensorFlow, or XGBoost.
  • Apply SHAP or similar techniques to generate interpretable model explanations.
  • Build and maintain training, processing, and inference pipelines using AWS SageMaker.
  • Deploy and optimise low-latency, Real Time inference endpoints.
  • Implement feature drift and concept drift monitoring.
  • Apply procedures for data handling, encryption, PII minimisation, and auditability.
  • Conduct validation of models using golden datasets and baseline tests.

Essential Skills

  • Strong experience delivering production-grade ML systems.
  • Proficiency with AWS SageMaker, including training jobs and Model Registry.
  • Excellent skills with ML models like PyTorch, TensorFlow, or XGBoost.
  • Hands-on experience with model explainability tools such as SHAP.
  • Understanding of low-latency, Real Time inference patterns.
  • experience in drift detection, monitoring, and telemetry.
  • Working knowledge of ML governance and secure ML practices.
  • Strong understanding of MLOps, CI/CD, and automation for ML workflows.

Additional Skills & Qualifications

  • experience with feature stores or Lakehouse data architectures.
  • Previous experience with ranking, matching, or similarity models.
  • Familiarity with cross-account AWS IAM patterns.
  • Bachelor’s degree in a STEM subject such as mathematics, physics, engineering, or computer science.

Why Work Here?

Join a forward-thinking company focused on innovation and excellence in machine learning. We provide a collaborative environment where your contributions directly impact the development of cutting-edge technology. Enjoy opportunities for professional growth and be part of a team dedicated to pioneering advancements in AI/ML.

Work Environment

Work in a dynamic and collaborative environment leveraging state-of-the-art technologies. You will have access to modern tools and resources, including AWS SageMaker and various ML frameworks. Our flexible work culture promotes work-life balance and encourages continuous learning and development.

Location

London, UK

Trading as TEKsystems. Allegis Group Limited, Bracknell, RG12 1RT, United Kingdom. No Allegis Group Limited operates as an Employment Business and Employment Agency as set out in the Conduct of Employment Agencies and Employment Businesses Regulations 2003. TEKsystems is a company within the Allegis Group network of companies (collectively referred to as “Allegis Group”). Aerotek, Aston Carter, EASi, Talentis Solutions, TEKsystems, Stamford Consultants and The Stamford Group are Allegis Group brands. If you apply, your personal data will be processed as described in the Allegis Group Online Privacy Notice available at our website.

To access our Online Privacy Notice, which explains what information we may collect, use, share, and store about you, and describes your rights and choices about this, please go our website.

We are part of a global network of companies and as a result, the personal data you provide will be shared within Allegis Group and transferred and processed outside the UK, Switzerland and European Economic Area subject to the protections described in the Allegis Group Online Privacy Notice. We store personal data in the UK, EEA, Switzerland and the USA. If you would like to exercise your privacy rights, please visit the “Contacting Us” section of our Online Privacy Notice on our website for details on how to contact us. To protect your privacy and security, we may take steps to verify your identity, such as a password and user ID if there is an account associated with your request, or identifying information such as your address or date of birth, before proceeding with your request. commitments under the UK Data Protection Act, EU-U.S. Privacy Shield or the Swiss-U.S. Privacy Shield.

Full Stack Typescript Engineer
SR2
London
Hybrid
Mid - Senior
£70,000 - £90,000

Full Stack Engineer TypeScript, React, Node.js, AWS Hybrid (Central London - fortnightly) 70-90k

Would you like to join a team focussed on cutting-edge technology, in an environment that propagates exploring new tools & techniques?

I’m working with an established fintech organisation that provide essential backend services for thousands of daily transactions - the work they do is crucial to finance in the 21st century!

They’ve recently undergone a major technical evolution, moving into a modern full stack TypeScript environment and they’re looking for engineers to join the team and be part of this work.

You’ll be working closely with TypeScript wizard of a Tech Lead and Engineering Manager who has helped many engineers achieve their career development goals.

They’re looking for people that love to learn new things and work in an environment alongside other smart & passionate engineers, where the team can collaborate on new ideas and new ways of doing things.

The leadership in the business is second to now - they know how to build great products and great environment for engineers to flourish!

This is perfect for someone who enjoys solving complex problems, exploring new technology and contributing to meaningful, high-impact systems.

What you’ll need

  • Strong commercial experience with full stack TypeScript development (it’s ok to have a backend lean or be fully full stack (Node.js/React/Next.js)
  • Good experience of AWS and exposure to DevOps (for example, they would love someone to be keen on learning Terraform if they don’t already know it)
  • Solid understanding of system design and architectural principles
  • A strong holistic approach to testing
  • Eager to explore new technologies & be forward-thinking with advancements in the TypeScript ecosystem
  • Experience in or an interest in using AI-assisted tools to support increased productivity, e.g. Claude or Gemini (they use these tools to support engineers, not to build all of their code!)
  • Be able to travel into the City of London once every fortnight

Click the ‘apply’ button now to find out more!

Lead Azure Platform Engineer
Opus Recruitment Solutions Ltd
London
Fully remote
Senior
£600/day - £625/day

Lead Azure Platform Engineer - API Platform (APIM/Apigee) | £600- £625 InsideIR35 | 6 month initial | Fully Remote

The role is to take ownership and lead the design, development, and maintenance of the API Platform along with conducting reviews of API designs to ensure they align with the standards and governance requirements of the platform.

Collaborate with cross-functional teams to define API requirements.
Ensure the platform is scalable, secure, and performs to meet the current and future needs.
Set technical standards and best practices for API development.

Key requirements:- Work with delivery leads and product owners to plan, schedule and refine technical work.

  • Design, implementation, and operations of Google Apigee in a technology lead role
  • Programming language experience in particular Python or Javascript
  • Cloud architecture: Azure (Specifically Pipelines)
  • Enterprise API Platform preferably Apigee

Lead Azure Platform Engineer - API Platform (APIM/Apigee) | £600- £625 InsideIR35 | 6 Month Initial | Fully Remote

Head of SW Engineering
Comoro
London
In office
Leader
£85,000 - £95,000

Head of Engineering

Location: South Of England

Salary: £85k £95k (based on experience) plus Benefits
Reports to: CTO

Company Overview:

Our client is a scale-up SaaS technology company that provides services in the Telecoms, ISP, and MSP sectors. They are making significant ground in their growth strategy and are seeking to hire a Head of Engineering to help them achieve their goals.

Role Overview

We are seeking an experienced Head of Engineering to lead and take full ownership of engineering delivery, team performance, and operational excellence across our client s software development organisation.

Reporting to the CTO, this is a high-impact leadership role that sits at the intersection of technical credibility and engineering management. You will be responsible for building a high-performing engineering function, establishing clear accountability, and ensuring the organisation delivers software in a structured, predictable, and scalable way.

Key Responsibilities

  • Lead and take accountability for the performance of the engineering function, fostering a high-performing, professional, and delivery-focused culture.
  • Set clear expectations around ownership, accountability, and engineering standards across all teams
  • Coach, mentor, and develop engineers, raising the overall capability and consistency of the function including performance management, addressing underperformance where required and recognising strong contribution
  • Own the delivery of the engineering roadmap, ensuring work is delivered predictably, on time, and to a high standard including overseeing sprint planning, backlog management, and development workflows to ensure consistent execution
  • Monitor delivery performance (velocity, cycle time, bottlenecks) and take action to improve outcomes
  • Define and implement consistent engineering processes across teams, including:
    • Agile delivery (Scrum / Kanban)
    • Code review practices
    • Testing frameworks and QA processes
    • Release management and deployment
    • CI/CD workflows
  • Set and enforce clear standards for code quality, documentation, and maintainability
  • Although this role is not hands-on coding, strong technical credibility is essential. So, an earlier career as a software engineer, with experience building modern web applications (Node.js, TypeScript, Vue.js or similar).
  • Comfortable engaging on technical design, reviewing architecture, and supporting complex challenges across AWS, Docker, and event-driven or serverless systems.
  • The Head of Engineering directly leads two Development squads and one QA squad, with accountability for delivery, quality, and performance across the engineering function.
  • Work closely with the CTO to align engineering execution with technical strategy and partner with Product to ensure roadmap priorities are delivered effectively
  • Coordinate with DevOps and Support to ensure smooth deployment, platform reliability, and strong operational feedback loops

Success Measures (6 12 Months)

  • A well-structured and accountable engineering function with clear ownership at all levels
  • Consistent and predictable delivery of roadmap commitments
  • Improved engineering performance, velocity, and delivery confidence
  • Strong and consistent engineering standards across teams
  • Reduced reliance on the CTO for day-to-day delivery oversight
  • A motivated, engaged, and high-performing engineering tea

Essential Skills & Experience

  • Proven experience leading engineering or development teams in a SaaS or software environment
  • Experience managing multiple teams or squads
  • Demonstrated ability to improve delivery, processes, and team performance
  • Experience working closely with Product in an agile environment
  • Strong organisational and leadership skills, with the ability to bring structure to complex environments
  • A leadership style that sets clear expectations, drives accountability, and improves performance

Personal Attributes

You should be highly organised and operationally disciplined as well as having a demonstrable leadership presence with the ability to build trust and credibility quickly. We need a leader that is pragmatic, delivery-focused, and results-oriented. You should be experienced and comfortable setting and enforcing high standards and able to operate effectively in a fast-moving, evolving SaaS environment

Technical Lead - Active SC, Java
Hays Technology
London
Remote or hybrid
Senior
£500/day - £550/day
+4

Up to 550 per day (Inside IR35)

London / Remote

3 months initially

My client is an instantly recognisable consultancy who urgently requires a Technical Lead/Lead Developer, with Active Security Clearance (SC), and with proven team lead experience to join a business-critical programme.

Key Requirements:

  • Proven experience working as a Lead Java Developer within the public sector
  • Demonstrable team lead / leadership experience - ability to guide developers, support technical decision making, and ensure delivery standards
  • Active Security Clearance (SC)
  • Expertise in a range of technologies, including Java 8 and 17+, Spring / Spring Boot, React / HTML
  • AWS Cloud Services experience
  • Working experience with MySQL

Nice to have:

  • Technical hands-on experience with Terraform, Kibana, Apache Camel
  • Linux in a containerised environment
  • Immediate availability

If you’re interested in this role, click ‘apply now’ to forward an up-to-date copy of your CV, or call us now.
If this job isn’t quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.

Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C’s, Privacy Policy and Disclaimers which can be found at (url removed)

Software Engineers - Java/AWS (Mid to Lead Level)
Omega Resource Group
London
In office
Mid - Senior
Private salary
+12

Location: London
Type: Permanent
Working Pattern: 4xFlex, 37.5 hours per week

We are currently working with a client in the Aerospace & Defence sector who are expanding their London-based team and are looking to hire Software Engineers (Java/AWS) at mid to lead level.

This opportunity sits across a range of Defence, Cyber and Intelligence programmes, focused on developing secure, cloud-based solutions within mission-critical environments.

A key requirement for this position is the ability to obtain and maintain high-level security clearance. If you do not currently hold this, support will be provided throughout the application process.

The Role:

You will work under the guidance of a Software Engineering Lead or, at senior level, take on additional responsibility for technical delivery and supporting wider engineering activities. You may specialise in a particular area or work across multiple disciplines, with a strong focus on the Cyber domain.

Typical responsibilities include:

Conducting software development activities and contributing to technical delivery
Designing and developing tests to debug and validate software
Working with customer requirements to develop mission/business applications
Supporting the full software development lifecycle using appropriate tools, standards and processes
Analysing system capabilities and resolving technical queries
Correcting program errors and maintaining documentation
Preparing operating instructions and technical documentation
Championing automation through Infrastructure as Code (IaC), CI/CD and test automation
Skills & Experience:

Strong proficiency in Java
Knowledge of additional languages such as Python, C++, JavaScript, TypeScript or React (desirable)
Experience developing software for cloud environments, particularly AWS
Understanding of microservices and/or serverless architectures
Familiarity with CI/CD pipelines for cloud deployments
Awareness of challenges when migrating on-premise workloads to the cloud
Knowledge of AWS services such as EC2, EKS, Fargate, IAM, S3 and Lambda
Experience working in Linux environments
Understanding of unit testing and mocking frameworks (e.g. JUnit 5)
Experience with Git version control
Knowledge of Agile development methodologies (SCRUM)
Understanding of relational databases (e.g. Oracle) and/or MongoDB
Familiarity with GitLab CI/CD pipelines
Experience using Atlassian tools (Bitbucket, Jira, Confluence)
Understanding of Elasticsearch, Kibana and Hibernate
Desirable Certifications:

Oracle Java Certification / AWS Certification / ISTQB Certification / OSCP Certification / CCNA Certification

PLEASE NOTE: eDV clearance is required to start. The process can take up to 18 months

Omega is an employment agency specialising in opportunities at all levels within the Engineering, Manufacturing, Aerospace, Automotive, Electronics, Defence, Scientific, Energy & Renewables and Tech sectors

C# Developer
Apex Systems US
London
In office
Mid - Senior
£50/hour - £55/hour

Title: C# Developer

Location: Bromley, UK

Type: Contract

Candidates will be proficient in software design focused on a cross-language REST based n-tier architecture and executed using agile methodologies (Scrum, Test Driven Development, unit/integration testing, pair programming, etc.). The successful candidate will be comfortable driving design and architecture, rationalizing business requirements and mentoring less experienced developers. There will be significant interaction with senior developers across other work streams as we integrate an increasingly complex product set. Responsibilities will include but not be limited to the following:

ROLE / RESPONSIBILITIES

  • Develop a thorough understanding of our entire technology stack
  • Design and develop new features within existing Java services; create new services to expand the overall framework
  • Contribute to future design and architecture
  • Plan work in an agile manner with other team members
  • Write acceptance tests in coordination with QA
  • Provide L3 user support
  • Communicate with our business and platform partners
  • Improve and develop our CI pipeline and deployment strategies

REQUIRED SKILLS/EXPERIENCE

  • Demonstrable experience of having designed and developed complex server-side functionality in C#
  • SQL - preferably Oracle
  • Shell scripting and basic Unix knowledge desirable
  • Proficient in writing unit, integration, and acceptance tests
  • Comfortable in an agile working environment
  • Self-starter and proactive

DESIRABLE SKILLS/EXPERIENCE

  • Experience with UI technologies; C#, WPF/Winforms, RESTful services
  • Knowledge of Equity Derivatives
Lead C# Backend Developer - Perm - London
Infused Solutions Ltd
London
In office
Senior
£75,000 - £85,000

Lead C# Backend Developer

Location: Central London (Onsite) Salary: 75,000 - 85,000 Type: Permanent Sponsorship: Not available (must be UK-based)

Overview

We are working with an established software house based in Central London who are looking to hire a Lead C# Backend Developer to join their growing engineering team.

This is a fully onsite role, ideal for someone who thrives in a collaborative environment and enjoys working closely with both technical and non-technical stakeholders.

Role & Responsibilities

  • Lead the design and development of scalable backend systems using C# and .NET Framework
  • Provide technical leadership and mentorship to a team of developers
  • Take ownership of backend architecture and ensure best practices are followed
  • Work closely with cross-functional teams including front-end, QA, and product
  • Contribute to system design, performance optimisation, and code quality
  • Participate in code reviews and promote clean, maintainable coding standards
  • Troubleshoot and resolve complex technical issues

Key Requirements

  • Strong commercial experience with C# and .NET Framework
  • Deep understanding of backend development principles and architecture
  • Strong experience working with SQL and relational databases
  • Proven experience in a Lead or Senior Developer position
  • Experience building scalable, high-performance applications
  • Strong understanding of software design patterns and best practices
  • Excellent problem-solving and communication skills

Desirable Skills

  • Experience with modern .NET (Core / .NET 6+)
  • Exposure to cloud platforms (Azure preferred)
  • Experience working in an Agile environment

Additional Information

  • This role is fully onsite in Central London
  • Candidates must already be UK-based and have the right to work in the UK (no sponsorship available)
  • Opportunity to join a well-established software business with a strong technical team

If you are a hands-on Lead Developer looking for your next challenge in a fast-paced environment, please apply or get in touch for more information.

Senior Software Engineer
Edison Hill Search
London
Hybrid
Senior
£75,000 - £85,000

Senior Software Engineer (Backend) Series A eCommerce x Fintech Meaningful equity Buying clothes online still isn t a great experience. Sizing is inconsistent, returns are costly, and customers are often left guessing. Yet despite all the innovation in eCommerce, this problem remains largely unsolved. We re working with a high-growth, well-funded Series A startup that s changing that enabling *Try Before You Buy* experiences for leading fashion retailers. The product is live, gaining traction, and now entering a critical phase of growth, including expansion into the US. To support that, they re rebuilding and scaling key parts of their platform. This is where you come in. You ll join a small, experienced engineering team and work directly with the CTO on the systems that sit at the heart of the product. This isn t about maintaining legacy code or picking up tickets. It s about building, improving, and scaling a platform that directly impacts customer experience and revenue. The environment is backend-leaning, built around Node.js, TypeScript and MongoDB, with an API-first, event-driven approach. But more important than the stack is the mindset engineers here are trusted to take ownership, think in systems, and deliver end-to-end. You ll be given the space to focus, the autonomy to make decisions, and the responsibility to get things into production quickly and properly. What they re looking for is someone who has seen scale or at least understands what it takes to get there. Someone who has worked in a startup or high-growth environment, where ambiguity is normal and ownership isn t optional. You ll likely be strongest on the backend, comfortable designing and building production systems, and thoughtful about performance, trade-offs, and long-term maintainability. You don t need to know everything, but you do need to be curious, pragmatic, and capable of figuring things out. If you ve had exposure to eCommerce, payments, or marketplace platforms, that s helpful but not essential. What makes this opportunity stand out is timing. The team is still small, but not at zero. The product is live, but not finished. The business has funding, traction, and a clear direction but plenty left to build. There s a genuine opportunity here to shape both the platform and your own role as the team grows over the next months. And importantly, you ll be part of that journey in a meaningful way, with equity that reflects early-stage impact and upside. The package includes a salary up to £85,000, flexible holiday, hybrid working (one day in the office per week), and a range of additional benefits but the real value here is the chance to build something that matters, in a team where your contribution is visible from day one. If you re an engineer who enjoys building real products, solving meaningful problems, and working in an environment where ownership and impact matter more than process, this is worth a conversation. Apply or get in touch for a confidential discussion. EHS Partners Limited, Edison Hill Search & Edison Hill Scale are operating and advertising as an Employment Agency for permanent positions and as an Employment Business for interim / contract / temporary positions. EHS Partners Limited are an Equal Opportunities employer and we encourage applicants from all backgrounds. Please apply below at your earliest convenience.

Senior Software Developers
BrightBox Group
London
Fully remote
Senior
£450/day - £500/day
+1

Senior Software Developer (Contract)
Rate: Up to 500 per day (Inside IR35)
Duration: Initial 3-month contract (starting ASAP)
Location: Remote (UK-based)

A client of ours is seeking experienced Senior Software Developers to join their team on an initial 3-month contract.

Key Responsibilities

  • Design, develop, and maintain scalable software solutions
  • Collaborate with cross-functional teams to deliver high-quality products
  • Contribute to architecture decisions and best practices
  • Work within cloud-based environments and modern development frameworks

Required Skills & Experience

  • Strong experience with Java and Spring Boot
  • Working knowledge of Kotlin and/or Node.js
  • Hands-on experience with AWS
  • Familiarity with Amazon EKS and associated tooling
  • Experience with Terraform or other Infrastructure as Code (IaC) tools
  • Government industry experience

Additional Requirements

  • Experience working within government environments is highly desirable
  • Active SC clearance, or eligibility to obtain it, is required
Solution Architect
Square One Resources
London
In office
Mid - Senior
£495/day - £525/day
+6

Job Title:Solution Architect
Location: London
Salary/Rate: £495 - £525
Start Date: 04/05/2026
Job Type: Contract

Company Introduction A global property and casualty insurance provider headquartered in Boston, Massachusetts. Founded in 1912, it operates through a network of subsidiaries and affiliates, offering a wide range of personal and commercial insurance products, including auto, home, workers compensation, and specialty lines.

Job Responsibilities/Objectives
1.Lead and manage software development projects using Java, Python, Typescript, AWS, React JS, Angular, and other technologies.
2.Collaborate with cross-functional teams to define project scope, objectives, and deliverables
3.Create the high-level design (or solution architecture documents) for the business requirements
4.Proficient using architectural principles and patterns, variety of solution types, detailed design patterns, best practices, integration choices etc

Required Skills/Experience
1.Strong experience within the Insurance domain (London Market experience is highly desirable).
2.Proven expertise in software architecture, design, and hands-on development.
3.Strong technical background in .NET, Java, Python, TypeScript, AWS, React, and Angular.
4.Demonstrated experience managing full project life cycles from concept to delivery.

Desirable Skills/Experience
Although not essential, the following skills are desired by the client:
1.Experience with microservices architecture and event-driven design (eg, Kafka, messaging systems)
2.Knowledge of DevOps practices and CI/CD pipelines (eg, Jenkins, GitHub Actions, Azure DevOps)
3.Familiarity with containerization and orchestration tools (Docker, Kubernetes)
4.Exposure to cloud architecture best practices, particularly AWS Well-Architected Framework

If you are interested in this opportunity, please apply now with your updated CV in Microsoft Word/PDF format.

Disclaimer
Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies.
Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.

Frequently asked questions
Haystack offers a variety of Tech Lead positions in London across multiple industries including fintech, health tech, e-commerce, and startups. Roles range from software development leads to engineering managers specializing in different tech stacks.
While some employers prefer candidates with local experience, many Tech Lead job listings on Haystack are open to remote candidates or those willing to relocate to London. Be sure to check the specific job requirements for each listing.
Common sought-after skills include strong leadership and communication abilities, expertise in programming languages like JavaScript, Python, or Java, experience with cloud platforms (AWS, Azure), and a solid understanding of software development methodologies such as Agile or Scrum.
Tailor your CV to highlight leadership experience and technical expertise relevant to the job description. Include measurable achievements, demonstrate your ability to manage teams, and showcase familiarity with the specific technologies or frameworks listed.
Yes, many London-based companies offer remote or hybrid work arrangements for Tech Lead positions. Haystack allows you to filter job listings based on work location preferences to find roles that match your desired working style.