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Backend Engineer Jobs in London
Overview
Looking for Backend Engineer jobs in London? Discover top IT opportunities tailored for backend developers on Haystack. Whether you're skilled in Java, Python, or Node.js, explore the latest backend engineering roles with leading tech companies in London and take your career to the next level. Start your search now and find your perfect backend developer job in London today!
Staff Engineer (Oracle MOM)
TJX Europe
Watford
In office
Senior - Leader
Private salary
RECENTLY POSTED

TJX Companies

At TJX Companies, every day brings new opportunities for growth, exploration, and achievement. You’ll be part of our vibrant team that embraces diversity, fosters collaboration, and prioritizes your development. Whether you’re working in our four global Home Offices, Distribution Centers or Retail Stores-TJ Maxx, Marshalls, Homegoods, Homesense, Sierra, Winners, and TK Maxx, you’ll find abundant opportunities to learn, thrive, and make an impact. Come join our TJX family-a Fortune 100 company and the world’s leading off-price retailer.

Job Description:
Staff Engineer (Oracle MOM)

Who we are
The Oracle Retail Solution Delivery team develops the software and systems that support TJX’s core financial Oracle MOM suite applications including Stock Ledger, Sales Audit and Markdowns. This role leverages your experience with Oracle Technologies to deliver our scalable global applications. Our team is looking for people with a passion for technology, intellectual curiosity, and a willingness to try new things that drive better solutions and help the MOM ART achieve high-value results for our customers. We want creative people that are familiar with the challenges of working within a large organization with many stakeholders as well as the hands-on challenges of designing, developing, and
deploying software using Oracle technologies. A strong background of technical and functional achievements with the MOM suite with a commensurate detailed knowledge of the strengths/weaknesses of the on-prom suite is expected. A solid awareness of the ORACLE SaaS Merchandise Foundation, Price Hub & Sales Audit offerings a plus.

Responsibilities include;

  • Providing analysis to both technical and non-technical audiences.
  • Presentation skills with a high degree of comfort with both large and small audiences
  • Demonstrate a substantial Oracle Retail, Retail domain design level of knowledge (SaaS & ONPREM)
  • Demonstrated expertise in designing and implementing Oracle retail modules
  • (ONPREM/SaaS) customizations within MFCS
  • Demonstrate Expertise working on a wide range of Integration patterns
  • Ability to define effective Architectural and Design guard rails that drive efficient design and development processes

Demonstrated hands-on success;

  • in programming using: Java, Pro C and PL/SQL
  • in scripting languages using: JavaScript and shell script
  • in database query language such as: Oracle - performance, EXA, etc.
  • 9 + years of experience as an Engineer in a Retail domain or related occupation
  • Experience must include experience in agile software development
  • Demonstrated technical thought leadership in customer facing situations
  • Experience with industry standards for enterprise integration patterns

Benefits include Associate discount; 401(k) match; medical/dental/vision; HSA; health care FSA; life insurance; short/long-term disability; paid holidays/vacation /sick/bereavement/parental leave; EAP; incentive programs for management; auto/home insurance discounts; tuition reimbursement; scholarship program; adoption/surrogacy assistance; smoking cessation; child care/cell phone discounts; pet/legal insurance; credit union; referral bonuses. All benefits are subject to applicable plan or program terms (including eligibility terms) and may change from time to time. Contact your TJX representative for more information.

In addition to our open door policy and supportive work environment, we also strive to provide a competitive salary and benefits package. TJX considers all applicants for employment without regard to race, color, religion, gender, sexual orientation, national origin, age, disability, gender identity and expression, marital or military status, or based on any individual’s status in any group or class protected by applicable federal, state, or local law. TJX also provides reasonable accommodations to qualified individuals with disabilities in accordance with the Americans with Disabilities Act and applicable state and local law.

Address:
300 Value Way

Location:
USA Home Office Marlborough MA 300 Value Way

This position has a starting salary range of $(phone number removed) to $(phone number removed) per year. Actual starting pay is determined by a number of factors, including relevant skills, qualifications, and experience. This position is eligible for an annual incentive as well as long-term incentives.

Software Developer
Clear IT Recruitment
Borehamwood
In office
Mid - Senior
£40,000 - £45,000
RECENTLY POSTED

Job Description The main purpose of the role is to optimise and improve their systems through software development, maintenance, and assistance. The role is part of a small team responsible for the effective and efficient operation of the business through the design, development and testing of a range of exciting projects. During these projects you will be exposed to a number of different systems and technologies, providing a great environment to expand your skills. This will be achieved through the following key areas: • Systems development and management • Helpdesk support • Project work Key Accountabilities • Develop and manage IT software solutions to facilitate the business operations and realise the business strategy. • Provide 3rd line support for problems arising from the use of our software solutions. • Be involved in the full project life cycle, including planning, analysis, design, development, testing, implementing and maintenance. • Lead various projects/ initiatives, both planned and ad-hoc, ensuring fit for purpose for UK and European territories • Take ownership of projects from conception to delivery and ongoing support, working closely with our Customers and the wider I.T. Team • Capable of both contribution to strategic discussions and more tactical, practical problem solving. • Effectively use data to inform decisions which improve business performance. • Collaborate with colleagues in the I.T. team to develop improved solutions. • Ensure code conforms to established standards; maintaining the integrity and security of company systems and data. • Create and maintain systems documentation and user training materials. • Assist in infrastructure projects and day to day running of the IT estate Experience & skills required • T-SQL for creation of complex queries and stored procedures • Worked in and understood a retail, wholesale or distributed company Beneficial Skill-set • Sybase SQL Anywhere database management • Use of REST APIs to interface with other systems • Knowledge of JSON queries. Should you have any questions or wish to apply please do not hesitate to contact Clear IT Recruitment Limited. Please Note: Due to the number of applications we receive we may be unable to respond to every application directly. If you have not heard from us within 3 working days please assume your application has been unsuccessful

Senior Software Engineer
Platform Recruitment
London
Remote or hybrid
Senior
£100,000 - £190,000
RECENTLY POSTED

Title: Senior Software Engineer (Compilers)

Company: HPC & AI

Location: London (primarily remote)

Compensation: Up to 190,000

Company:

An advanced HPC R&D firm, looking to expand the UK compiler team. Most of the team are ex-Big-Tech, ex-FAANG or ex-Chip firms. They joined because they get more flexibility and have more challenging/interesting work to do as the team is significantly smaller, with highly technical leadership. If you want to work alongside some of the brightest, most enthusiastic people in the industry, this may be worth exploring.

Role:

Senior Software Engineer position with an emphasis on AI Compiler development. You will be a significant hire and will own much of the development of a cutting-edge compiler development project. Significant hires have already been made in the team to support this role.

Mostly LLVM based, it is important you also have experience working with GPUs to an extent.

About you:

  • 6 years+ as a compiler engineer
  • Strong C++ programming skills
  • Experience with LLVM, MLIR, Triton or other compilers
  • Experience with GPU architectures

Full details are available. Please don’t hesitate to get in touch.

Junior Software Developer
Platform Recruitment
London
Remote or hybrid
Junior
£40,000 - £65,000
RECENTLY POSTED

Junior Software Developer - 65,000

Title: Junior Software Developer (C++)

Client: High Performance Systems

Location: London, Cambridge or Remote (from the UK)

Package: Up to 65,000

This is a fantastic opportunity for any genuinely passionate graduates/junior engineers with a track record of extra-curricular/personal coding projects to join a high-performance team with a culture of knowledge sharing and collective growth.

The business are well reputed for growing graduates internally, and for providing ultra-low-latency solutions using C++.

The role:

  • Write high-performance C++ code.
  • Low-latency networking.
  • Work on live projects from day one with a team to support you.
  • You will have a dedicated mentor with expertise in software development to coach you into becoming the best engineer you can be.
  • There is a culture of hands-off management - you will be given trust and autonomy from the offset with no micromanagement.
  • Friendly and collaborative culture.

Requirements:

  • Computer Science or related degree
  • Must have a GitHub/extensive examples of personal programming projects (C/C++ preferred)
  • Genuine interest in technology!
  • You will stand out if you have low-level personal projects (e.g., compilers, networks, OS )
  • You will not be considered if you do not have a portfolio/code examples to share

If you are interested learning more, please get in touch.

Senior Golang Developer - Kubernetes - Financial Services
Rothstein Recruitment Ltd
London
In office
Senior
£130,000
RECENTLY POSTED
+11

Excellent opportunity opens for an experienced Developer strong on Golang with experience in AWS and Kubernetes to join a highly regarded Financial Services entity’s London office. You will act as the team lead and play a key role in building mission-critical financial applications that power trading, investment, and risk management systems across the firm.

If you are passionate about working in a dynamic, fast-paced environment and are eager to apply your technical expertise to the financial services industry, this is the role for you.

Key Responsibilities:

  • Design, develop, and maintain high-performance Back End services using GoLang to support financial applications and services, including trading platforms, investment systems, and risk management tools.
  • Build and deploy cloud-based solutions using Amazon Web Services (AWS), including services such as EC2, S3, RDS, DynamoDB, and Lambda to create scalable, reliable, and secure infrastructure.
  • Implement and manage containerized applications using Kubernetes, ensuring seamless orchestration, scaling, and resilience in a cloud environment.
  • Write clean, efficient, and well-documented code while following best practices for financial systems development, focusing on performance and security.
  • Collaborate with other development teams, business analysts, and stakeholders to define and refine requirements, and ensure that applications meet financial regulatory standards and business needs.
  • Optimize the performance of Back End services, ensuring low-latency responses and high availability, critical for financial services.
  • Implement CI/CD pipelines, automated testing, and monitoring systems to ensure the reliability and stability of production systems.
  • Proactively identify issues and bottlenecks in existing systems and propose solutions to improve the system’s performance and scalability.
  • Stay updated with new tools, technologies, and industry trends in cloud computing, containerization, and financial systems to continuously improve development practices and outcomes.

Ideal Skills:

  • Proven experience (2+ years) in GoLang Back End development, with a strong focus on performance optimization and building scalable systems for high-volume, high-frequency financial applications.
  • Strong experience working with Amazon Web Services (AWS), including EC2, S3, RDS, DynamoDB, Lambda, and other cloud-native technologies.
  • Hands-on experience with Kubernetes for deploying, managing, and scaling containerized applications in a cloud environment.
  • Solid understanding of financial systems and services, particularly in areas such as trading platforms, investment management, and risk analytics.
  • Experience in building microservices architectures and working with APIs (RESTful, gRPC, etc.) to integrate various systems.
  • Strong knowledge of containerization (Docker) and continuous integration/deployment (CI/CD) practices.
  • Experience with database systems (relational and NoSQL) and working with financial data.
  • Familiarity with DevOps practices and tools to streamline the development life cycle, such as infrastructure-as-code (eg, Terraform or CloudFormation).
  • Ability to troubleshoot and resolve issues in production environments, ensuring uptime and performance in high-pressure, mission-critical scenarios.
  • Excellent communication skills to collaborate effectively with cross-functional teams and stakeholders in a fast-paced financial environment.
  • Experience with serverless computing (AWS Lambda, etc.) to create efficient and scalable solutions.
  • Knowledge of financial industry regulations and standards, particularly around data security and privacy.
  • Familiarity with event-driven architectures or message queues (eg, Kafka, RabbitMQ) for Real Time data processing.
  • Experience with automated testing frameworks and continuous delivery tools like Jenkins, GitLab CI, or CircleCI.
  • Understanding of performance monitoring and observability tools such as CloudWatch, Prometheus, or Datadog.

Interested? Please Apply!

Golang Go AWS Kubernetes Terraform Bank Banking Finance Financial Services Crypto Blockchain Web3 Trading Exchange Digital Assets Hybrid Flexible Developer Software Engineer Backend Developer Golang Engineer Kafka Apache Kafka RabbitMQ AWS Lambda Cloud Platform

Junior Software Developer
Platform Recruitment
London
Remote or hybrid
Junior
£40,000 - £65,000
RECENTLY POSTED

Junior Software Developer - £65,000 Title: Junior Software Developer (C++) Client: High Performance Systems Location: London, Cambridge or Remote (from the UK) Package: Up to £65,000 This is a fantastic opportunity for any genuinely passionate graduates/junior engineers with a track record of extra-curricular/personal coding projects to join a high-performance team with a culture of knowledge sharing and collective growth. The business are well reputed for growing graduates internally, and for providing ultra-low-latency solutions using C++. The role: * Write high-performance C++ code. * Low-latency networking. * Work on live projects from day one with a team to support you. * You will have a dedicated mentor with expertise in software development to coach you into becoming the best engineer you can be. * There is a culture of hands-off management - you will be given trust and autonomy from the offset with no micromanagement. * Friendly and collaborative culture. Requirements: * Computer Science or related degree * Must have a GitHub/extensive examples of personal programming projects (C/C++ preferred) * Genuine interest in technology! * You will stand out if you have low-level personal projects (e.g., compilers, networks, OS…) * You will not be considered if you do not have a portfolio/code examples to share If you are interested learning more, please get in touch

Spotlight
Senior Software Engineer
Opencast
Multiple locations
Hybrid
Senior - Leader
£59,001 - £72,000

Ready to work somewhere that cares more about how you build software than how fast you can ship it?

At Opencast, we don’t measure developers by the number of tickets you complete. We care about engineering craft, clean design and thoughtful problem-solving.

Opencast consultants deliver in complex environments, pairing often and working with others who take pride in doing things properly: TDD, emerging design, refactoring and leaving code better than they found it. We build software we are proud of, and our clients trust us not just to code but to think, challenge and guide. If you value simple and robust solutions and want a role where your judgment matters as much as your keyboard, you will fit right in.

The role

Software developers at Opencast care about building products right and combine their own experience and approach with our company values. They are tech agnostic, have expertise in agile methodologies, extreme programming practices and use industry-leading programming languages to deliver agile transformation.

Our approach to software development is collaborative, focused on keeping things simple, and we use test driven development and pair programming as best practice.

Working with clients and key stakeholders is a crucial part of a consultancy role. Our developers are inclusive team players that listen, collaborate, can positively challenge and manage expectations when needed but most of all are always willing to teach and help others. Leaving a client with improved ways of working, working technology and a good experience from discovery through to live is the priority.

The role is varied, technical, never confined to any one provider or solution and there are always opportunities for learning and development.

Requirements

Due to the nature of this role, applicants must either currently hold active Security Check (SC) Clearance or be eligible to obtain it.

Eligibility typically requires UK citizenship and continuous residence in the UK for the past five years, with no single absence exceeding 28 consecutive days.

Experience in delivering digital services for the UK government is highly valuable for many of our projects. Therefore, familiarity with the GDS toolkit will be beneficial.

Technical Skills

  • Expertise in Java or Scala is required
  • Experience in other languages such as Kotlin, Ruby or Javascript is also valuable
  • Deep understanding of programming paradigm, code design, testing, accessibility, performance and security
  • Proven ability to apply different testing tools and methods in practice
  • Knowledge or experience of delivering complex services to Government Digital Service (GDS) standards
  • Being comfortable with new technology, t-shaped and comfortable with ongoing learning and development is key to success.
  • Experience with agile methodology

A senior consultant in software development at Opencast is responsible for:

  • Driving the elaboration of their team’s backlog
  • Setting testing strategies to match industry standards
  • Being a technical expert in their team (or acting as the team lead)
  • Leading the technical representation in a project discovery
  • Mentoring and coaching others to help them achieve their full potential
  • Demonstrating leadership within Opencast communities of practice

Salary

£59,001 - £72,000

What we offer

A competitive package including a 7% employer pension contribution, share options and a discretionary bonus. You’ll also benefit from flexible working hours (aligned to client commitments), 25 days’ holiday, and access to 3 annual “life happens” days to support unexpected situations. We also offer wellbeing support, ongoing professional development, volunteering opportunities and the chance to be part of a genuinely supportive team.

Where you’ll work

This role requires regular on-site attendance across our HQ, hub offices, client sites and home. Applicants must be able to commute to offices and client sites as part of their normal working arrangements, as travel is essential to fulfilling the responsibilities of the role.

We include you

We welcome candidates from all identities, attributes, ways of thinking and backgrounds to thrive in a career at Opencast. Our aim is for the diversity of our people to be reflected in the solutions we deliver, to help create a fairer society for all.

Interview

Interviews will be conducted via Microsoft Teams. We’re happy to make adjustments to support your needs.

Want to know more?

Visit our website for more details.

Spotlight
Software Engineer
Opencast
Multiple locations
Hybrid
Mid
£47,000 - £55,000

Ready to work somewhere that cares more about how you build software than how fast you can ship it?

At Opencast, we don’t measure developers by the number of tickets you complete. We care about engineering craft, clean design and thoughtful problem-solving.

Opencast consultants deliver in complex environments, pairing often and working with others who take pride in doing things properly: TDD, emerging design, refactoring and leaving code better than they found it. We build software we are proud of, and our clients trust us not just to code but to think, challenge and guide. If you value simple and robust solutions and want a role where your judgment matters as much as your keyboard, you will fit right in.

The role

Software developers at Opencast care about building products right and combine their own experience and approach with our company values. They are tech agnostic, have expertise in agile methodologies, eXtreme programming practices and use industry-leading programming languages to deliver agile transformation.

Our approach to software development is collaborative, focused on keeping things simple, and we use test driven development and pair programming as best practice.

Working with clients and key stakeholders is a crucial part of a consultancy role. Our developers are inclusive team players that listen, collaborate, can positively challenge and manage expectations when needed but most of all are always willing to teach and help others. Leaving a client with improved ways of working, working technology and a good experience from discovery through to live is the priority.

The role is varied, technical, never confined to any one provider or solution and there are always opportunities for learning and development.

Requirements

Due to the nature of this role, applicants must either currently hold active Security Check (SC) Clearance or be eligible to obtain it.

Eligibility typically requires UK citizenship and continuous residence in the UK for the past five years, with no single absence exceeding 28 consecutive days.

Experience in delivering digital services for the UK government is highly valuable for many of our projects. Therefore, familiarity with the GDS toolkit will be beneficial.

Technical Skills

  • Expertise in Java or Scala is required
  • Experience in other languages such as Kotlin, Ruby or Javascript is also valuable
  • Understanding of Object Oriented Programming
  • In depth knowledge of concepts and uses of testing
  • Knowledge or experience of delivering complex services to Government Digital Service (GDS) standards
  • Being comfortable with new technology, t-shaped and comfortable with ongoing learning and development is key to success
  • Experience with agile methodology

A consultant in software development at Opencast is responsible for:

  • Delivering in the upkeep of their team’s backlog
  • Collaborating with the teams testing effort
  • Leading on the implementation of user stories
  • Embracing mobbing and pairing
  • Working with others in a collaborative, multi-disciplinary environment
  • Contributing to Opencast’s communities of practice

Salary

£47,000 - £55,000

What we offer

A competitive package including a 7% employer pension contribution, share options and a discretionary bonus. You’ll also benefit from flexible working hours (aligned to client commitments), 25 days’ holiday, and access to 3 annual “life happens” days to support unexpected situations. We also offer wellbeing support, ongoing professional development, volunteering opportunities and the chance to be part of a genuinely supportive team.

Where you’ll work

This role requires regular on-site attendance across our HQ, hub offices, client sites and home. Applicants must be able to commute to offices and client sites as part of their normal working arrangements, as travel is essential to fulfilling the responsibilities of the role.

We include you

We welcome candidates from all identities, attributes, ways of thinking and backgrounds to thrive in a career at Opencast. Our aim is for the diversity of our people to be reflected in the solutions we deliver, to help create a fairer society for all.

Interview

Interviews will be conducted via Microsoft Teams. We’re happy to make adjustments to support your needs.

Want to know more?

Visit our website for more details.

Spotlight
Senior Software Engineer (contract)
Opencast
Multiple locations
Hybrid
Senior
£450/day - £600/day
+4

Ready to work somewhere that cares more about how you build software than how fast you can ship it?

At Opencast, we don’t measure developers by the number of tickets you complete. We care about engineering craft, clean design and thoughtful problem-solving.

Opencast consultants deliver in complex environments, pairing often and working with others who take pride in doing things properly: TDD, emerging design, refactoring and leaving code better than they found it. We build software we are proud of, and our clients trust us not just to code but to think, challenge and guide. If you value simple and robust solutions and want a role where your judgment matters as much as your keyboard, you will fit right in.

The role

We’re looking for Contractors in Software Development (Senior level or Technical Lead) to help our major clients transform.

Software developers at Opencast care about building products right and combine their own experience and approach with our company values. They are tech agnostic, have expertise in agile methodologies, extreme programming practices and use industry-leading programming languages to deliver agile transformation.

Our approach to software development is collaborative, focused on keeping things simple, and we use test driven development and pair programming as best practice.

Working with clients and key stakeholders is a crucial part of a consultancy role. Our developers are inclusive team players that listen, collaborate, can positively challenge and manage expectations when needed but most of all are always willing to teach and help others. Leaving a client with improved ways of working, working technology and a good experience from discovery through to live is the priority.

Contractors at Opencast follow the same principles as permanent consultants. The roles are varied, technical, and never confined to any one provider or solution.

Requirements

Due to the nature of this role, applicants must either currently hold active Security Check (SC) Clearance or be eligible to obtain it.

Eligibility typically requires UK citizenship and continuous residence in the UK for the past five years, with no single absence exceeding 28 consecutive days.

As attendance at client sites is a routine part of the role’s working pattern and involves occasional travel, travel expenses are not covered.

Experience in delivering digital services for the UK government is highly valuable for many of our projects. Therefore, familiarity with the GDS toolkit will be beneficial.

Technical Skills

  • Expertise in Java and/or Scala is required
  • Experience in other languages such as Javascript, Typescript, Kotlin, Python or Ruby is also valuable
  • Experience in a technical leadership role
  • Deep understanding of programming paradigm, code design, testing, accessibility, performance and security
  • Proven ability to apply different testing tools and methods in practice
  • Knowledge or experience of delivering complex services to Government Digital Service (GDS) standards
  • Being comfortable with new technology, t-shaped and comfortable with ongoing learning and development is key to success
  • Experience with agile methodology

A senior level contractor in software development at Opencast is responsible for:

  • Driving the elaboration of their team’s backlog
  • Setting testing strategies to match industry standards
  • Being a technical expert in their team (or acting as the team lead)
  • Leading the technical representation in a project discovery
  • Acting as a technical lead in the team, enabling them to achieve their full potential

Salary

£450 - £600 per day (working inside IR35)

Where you’ll work

This role requires regular on-site attendance across our HQ, hub offices, client sites and home. Applicants must be able to commute to offices and client sites as part of their normal working arrangements, as travel is essential to fulfilling the responsibilities of the role.

We include you

We welcome candidates from all identities, attributes, ways of thinking and backgrounds to thrive in a career at Opencast. Our aim is for the diversity of our people to be reflected in the solutions we deliver, to help create a fairer society for all.

Interview

Interviews will be conducted via Microsoft Teams. We’re happy to make adjustments to support your needs.

Want to know more?

Visit our website for more details.

Senior Site Reliability Engineer
Stratospherec Ltd
London
Fully remote
Senior
£80,000 - £90,000
+6

Senior DevOps Engineer / Senior Site Reliability Engineer

Fully Remote working for candidates based in the UK Salary to £90k + Benefits

We are looking for a Senior DevOps Engineer that has strong C# code knowledge combined with strong knowledge of DevOps tools like Kubernetes (EKS or AKS) and Azure or AWS Cloud platforms. We are looking for a DevOps Engineer with a strong understanding of C# code combined with experience of monitoring tools like DataDog, Grafana and Prometheus to join a growing global Cloud Infrastructure team supporting SaaS products.

Our client are a Global Digital SaaS Software Company have a fantastic fully remote opportunity for an experienced Senior DevOps Engineer to join their UK Cloud Infrastructure team.

Site Reliability Engineers at this company are responsible for keeping the SaaS products running properly. Using concepts of software and systems engineering, they work to improve the reliability of all cloud systems while keeping levels of manual work low. DevOps are expected to be experienced in software engineering principals, operational discipline, and automation.

The Cloud and DevOps team work on a fully remote basis and work in conjunction with their US and Australian teams as well. This company are a market leader in Student community management software, this company s unique SaaS platform is an essential platform in the life of millions of University students across the globe.

In this role, you will apply your Software Engineering experience to enhance system performance and reliability, as well as building internal systems and capabilities that eliminate manual work through automation. You’ll be joining our Platforms teams with globally-dispersed Site Reliability and Platform Engineers in a “follow the sun” model to operate our products on a multi-region cloud platform.

Role Responsibilities:

  • Provide technical leadership and mentoring within the team through knowledge sharing sessions, pair programming, code reviews and solution design
  • Identify and implement technical solutions to improve platform reliability, including the creation of mitigation strategies and operational playbooks.
  • Implement and maintain monitoring/alerting/logging systems to identify and respond to incidents
  • Ensure scalability and efficiency of cloud infrastructure and systems to handle traffic and data growth
  • Conduct performance tests to identify and remediate bottlenecks
  • Develop and maintain platform solutions, automate infrastructure provisioning, configuration, and management tasks using Infrastructure as Code.
  • Monitor, review and tune databases to ensure high availability and performance
  • Collaborate with product engineering teams to design/build fit-for-purpose and observable software

Required Skills and Experience:

  • Proven experience in a SR DevOps / Site Reliability Engineering role and having strong code development experience in C# or similar OO development language.
  • Experience of supporting .Net applications as a DevOps Engineer is a big bonus in this role
  • Production experience operating containerization technologies - ideally with Kubernetes and/or Docker. Strong preference for AKS or EKS experience as well.
  • Proficiency with one or more public cloud providers such as Azure, AWS or GCP
  • Proficiency using Infrastructure as Code (IaC) tools such as Terraform (preferred), Ansible, or CloudFormation.
  • Experience with monitoring, observability and logging tools such as DataDog, Prometheus, Grafana, or similar.
  • Proven track record of maintaining highly-available and performant production environments.
  • Ability to identify and implement effective mitigation strategies and operational playbooks.

Useful / Bonus Skills to have:

  • Experience in CI/CD tooling: Azure DevOps/GitHub Actions, Octopus Deploy
  • Relevant certifications in cloud platforms (e.g., Microsoft Certified: Azure Solutions Architect) and DevOps practices (e.g., Certified Kubernetes Administrator) are a plus
  • Experience in database management/performance tuning, particularly MSSQL.

Employee benefits:

  • Opportunity to be a part of a 30+ year well-established, high-performance SaaS company.
  • Excellent Company Pension scheme and Life Insurance,
  • Excellent holiday allowance.
  • A supportive team environment with emphasis on learning and development opportunities
  • Working with a team of caring, high-performing, and passionate people who have fun supporting our vision, innovation, and continuous improvement.

This Senior Site Reliability Engineer role is working for a market leading global software company and this job is part of a large program of change and improvement in their Cloud SaaS products over the coming years. If you are looking for an interesting SRE role with a forward-thinking global organisation, then this would be a tremendous career opportunity to consider.

Please apply with your CV to find out more.

Junior Software Engineer
Haystack - Partnerships
London
Fully remote
Junior
£35,000 - £55,000

Haystack is working with a direct employer on this opportunity

Junior Full-Stack Software Engineer (React / TypeScript)

💰 £35k - £55k DOE

📍 Hybrid – London or Remote (UK)

We’re working with a high-growth SaaS startup that’s scaling fast and looking for a Junior Full-Stack Engineer to join their product team.

This is a chance to work in an environment where ideas move quickly, code ships daily, and your work directly impacts thousands of users. You’ll collaborate with experienced engineers, product designers, and founders who care deeply about great code, great culture, and building something that genuinely changes how people work.

What You’ll Do

  • Build and maintain modern, responsive web applications using React + TypeScript.
  • Work on Node.js microservices and contribute to scalable backend APIs.
  • Collaborate with product and design teams to turn concepts into working features.
  • Write clean, testable, and maintainable code across the full stack.
  • Participate in code reviews, sprints, and product demos in a fast-paced, startup environment.
  • Get hands-on exposure to AWS, Docker, GraphQL, and CI/CD pipelines.

What You’ll Bring

  • 1+ year of experience (commercial or project-based) with React and TypeScript.
  • Basic understanding of Node.js and MongoDB.
  • Passion for building products end-to-end and learning modern frameworks.
  • Curiosity, creativity, and a startup mindset — you enjoy solving real problems with real code.
  • A collaborative, team-first attitude and eagerness to learn from senior engineers.

Why It’s a Great Move

🚀 Work directly with founders and engineers shaping the next big product in their industry.

🧠 Access to mentorship, code reviews, and a clear growth pathway.

🏡 Flexible hybrid working (office HQ in Newcastle, remote welcome).

📚 Personal development budget and the latest dev tools.

❤️ Culture built on trust, ownership, and speed — no bureaucracy, just great engineering.

If you’re a hands-on developer ready to learn fast, ship fast, and grow with a company that’s going places, we’d love to hear from you.

📩 Apply now and join one of the UK’s most exciting early-stage tech teams.

Scala Developer
Haystack - Partnerships
London
Fully remote
Mid - Senior
£70,000 - £100,000

Haystack is working with a direct employer on this opportunity.

Company

We are using AI Agents to transform customer experience for ecommerce brands. With a proprietary approach to agentic AI, we have a unique opportunity to become the undisputed leader in our industry. We’re looking for excellent candidates to join our dedicated, thoughtful, and hardworking team to help us achieve that goal. We are a global company with offices in London, New York, and people across the world.

Our customers include some of the biggest names in retail including On, Rapha, Air Up, Holland & Barrett, AllSaints, Honeylove, and Clarins.

Role

We are looking for an experienced software engineer to help us build our product. You will be working on the platform and backend services of the product and also the middle layer that sits between third party customer support tools and our proprietary AI platform. We value autonomy, excellence, pragmatism and impact.

Responsibilities include:

  • Building microservices for our no-code platform, analytics, admin console, data management functionality and others
  • Designing and implementing maintainable and scalable architecture for consuming and providing APIs
  • Integrating with 3rd party systems

Required Experience

  • Scala (3+ years of real, hands-on experience in Scala in a professional environment)
  • Functional programming and hands-on experience with functional programming libraries
  • Experience developing HTTP RESTful APIs
  • Excellent knowledge of SQL and relational databases (PostgreSQL)
  • Knowledge of Terraform (hands-on experience), Docker, AWS
  • Experience building and deploying microservices-based architectures
  • We use a functional Scala stack, primarily built on the Typelevel ecosystem, including: http4s, Circe, Cats, Cats Effect, FS2, Monix, and Slick.

Interview Process

  • Our interview process is designed to be clear, fair, and human — just like how we work day to day.
  • Intro Call (40 mins) — A relaxed chat to learn more about you and share what we’re building.
  • Technical Stage — Show us how you think and solve problems, including a take-home challenge.
  • Culture Stage — We’ll explore how you collaborate, communicate, and align with our team values.
  • Final Chat — Meet a senior team member to discuss long-term goals and mutual fit.
  • We keep things efficient and most candidates complete all stages within 2–3 weeks.

Benefits

🚀 Thrive in a dynamic start-up culture

💰 £80k - £100k annual salary depending on experience

📈 Stock options

🏝️ 34 days off — 25 annual + 8 public + your birthday!

🎳 Quarterly team socials & perks

💪 Stay fit with a $210 monthly fitness stipend or Third Space membership

🎉 Celebrate your birthday with a day off!

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

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Frequently asked questions
Our job board features a wide range of Backend Engineer positions in London, including roles in startups, scale-ups, and large enterprises across various industries such as fintech, e-commerce, and healthcare.
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