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Overview
Looking for top Backend Engineer jobs? Discover the latest backend developer opportunities on Haystack, your go-to IT job board. Whether you specialize in Java, Python, Node.js, or Ruby, find the perfect backend engineering role to advance your tech career today. Start browsing backend developer jobs now!
Senior Software Developer
Spectrum IT Recruitment
Southampton
Hybrid
Senior
£65,000 - £70,000
RECENTLY POSTED
+4

C#, ASP.Net, Azure, REST API’s

Hybrid - 2 days per week in the Southampton Office

Join a global tech leader where innovation, high performance, and career growth are at the heart of everything they do. This is your chance to make a real impact as a Software Developer, working on mission-critical systems in a cutting-edge environment.

This is great opportunity to join a global business, benefiting from corporate benefits, continuous professional development and an opportunity to work on large programmes of work in public and private sectors.

Skills Required:

Solid experience developing ASP.NET web applications in C# using Visual Studio/Visual Studio Code
Experience creating RESTful APIs and ensuring API extensibility
Cloud experience (Azure, AWS)
Azure DevOps
Experience of unit and automated testing using tools such as NUnit, Jasmine and Selenium
Good knowledge of SOLID principlesDesirable Skills:

Containers (docker, K8s)
Security best practice (OWASP top ten)
OpenIDConnect/Identity server
Micro service architecture
MS SQL Server
Azure DevOps, TeamCity
Infrastructure as Code (Bicep, ARM templates, Terraform)

Benefits

* Medical Cover

* Death in Service

* Hybrid Working

* Shopping Vouchers

* GP Helplines

Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy

Dynamics 365 CRM Developer
Vistry Group PLC
Cheltenham
Hybrid
Mid - Senior
Private salary
RECENTLY POSTED

In a Nutshell…

We have an exciting opportunity for a Dynamics 365 CRM Developer to join our team within Vistry Services, at our Cheltenham office. As our Dynamics 365 CRM Developer, you will be responsible for designing, developing, customising, and extending Microsoft Dynamics 365 Customer Engagement and related Power Platform solutions. Working under the direction of the Dynamics Lead, you will deliver high quality enhancements, integrations, and technical support that improve system performance, business processes, and user experience.

We value in-person collaboration and team culture, but we’re also committed to supporting flexible working where possible. We encourage you to raise any specific requirements during the interview process so we can explore how this could be accommodated.

Let’s cut to the chase, what’s in it for you…

Competitive basic salary and annual bonus
Salary sacrifice car scheme available to all employees
Up to 39 days annual leave plus bank holidays
2 Volunteering days per annum
Private medical insurance, with employee paid cover
Enhanced maternity, paternity and adoption leave
Competitive pension scheme through salary sacrifice
Life assurance at 4 x your annual salary
Share save and share incentive schemes
Christmas company shutdown
Employee rewards portal with many more benefits…In return, what we would like from you…

Behave in line with our company values - Integrity, Caring and Quality
Relevant Microsoft certifications (e.g. Dynamics 365, Power Platform)
Hands on development experience with Dynamics 365 and Dataverse
Strong understanding of Dynamics 365 modules, workflows, Power Automate, and integrations
Analytical, clear communicator, proactive problem solver
Willingness to travel occasionallyDesirable…

Degree in IT, Computer Science or related field
Experience in large-scale digital transformation programmes
Knowledge of Azure Services, Dataverse APIs, or DevOps
Experience leading small teams or vendors
Full UK driving licenceMore about the Dynamics 365 CRM Developer role…

Delivery of high quality customisations and enhancements within agreed timescales
Reduction in system issues through stable, well engineered solutions
Adherence to development standards, security, and governance frameworks
Positive stakeholder feedback and increased user adoption
Successful implementation of integrations, automations, and feature releases
Accurate documentation and effective knowledge handover
Develop, configure, and customise Dynamics 365 modules to meet business requirements.
Build and enhance workflows, JavaScript components, Power Automate flows, dashboards, and model driven apps.
Support the Dynamics Lead in evaluating and prioritising change requests and system improvements.
Develop and maintain integrations between Dynamics 365, Dataverse, Azure services, and other business applications.
Write clean, efficient, scalable code following established patterns and best practices.
Perform technical testing, debugging, and deployment of enhancements and updates.
Support troubleshooting of complex Dynamics issues, providing second or third line support where required.
Maintain technical documentation including solution designs, mappings, and release notes.
Ensure compliance with security protocols, data governance, and development lifecycle processes.
Contribute to continuous improvement of development standards, tools, and methodologies.
Collaborate with the Dynamics Lead and wider teams to drive innovation and maximise platform capabilities.Finally, let’s tell you a bit more about us…

We build more than homes, we’re making Vistry. Being a responsible developer and award-winning employer means we live each day through our ethos - doing the right thing. Our behaviours reflect this, as well as our values of integrity, caring and quality. Shaping all we do; they empower us to develop sustainable communities across affordable and private housing. We work in a partnership-led way, and you’ll recognise our renowned brands Bovis Homes, Linden Homes and Countryside Homes. Together with Vistry Works, our manufacturing operation, and the functional support of Vistry Services, we’re a proud UK Green Building Council member, UK top five housebuilder with a five-star House Builders Federation (HBF) customer satisfaction rating, and winner of many awards including Top Employer, Global Top Inspiring Workplaces, and Best for Talent Attraction and Outreach.

Join us in making Vistry.

#LI-WS1

CRM Developer
DCS Recruitment Limited
Rugeley
Hybrid
Senior
£70,000 - £75,000
RECENTLY POSTED

Senior CRM Developer - Microsoft Dynamics 365

Salary: £75,000 + Benefits
Staffordshire (Hybrid - 1 day a month)
Consultancy Environment

Are you an experienced CRM Developer with deep expertise in Microsoft Dynamics 365? Do you enjoy working in a fast‑paced consultancy where no two projects are the same? This senior role offers the opportunity to drive high‑impact digital transformation programmes for a wide range of clients.

About the Role

As a Senior CRM Developer, you’ll be responsible for designing, developing, and delivering custom solutions across the Microsoft Dynamics 365 and Power Platform ecosystem. You’ll work closely with clients to understand their requirements, translate them into technical designs, and deliver quality solutions that enhance business processes and user experience.

This is a senior, client‑facing role with the autonomy to lead development workstreams and contribute to solution architecture.

Key Responsibilities

Lead the development of Dynamics 365 CE/CRM customisations, plugins, workflows, and integrations
Build solutions across Power Platform, including PowerApps, Power Automate, and Dataverse
Translate client requirements into scalable, secure technical designs
Integrate Dynamics 365 with external systems using APIs and Azure services
Contribute to presales conversations, estimations, and technical scoping
Provide technical guidance to junior developers and support project teams
Stay on top of Microsoft roadmap updates and best practices

Essential Skills & Experience

Extensive hands‑on experience with Microsoft Dynamics 365 CE / CRM
Skilled in C#, .NET, JavaScript, and modern development frameworks
Strong expertise in plugins, custom workflow activities, business rules, and form scripting
Experience with Power Platform (Canvas/Model-Driven Apps, Power Automate, Dataverse)
Knowledge of Azure Functions, Logic Apps, API Management, or similar integration tools
Ability to work in a consultancy or multi‑project environment
Excellent communication and client‑facing skills
Microsoft certifications (PL‑400, MB‑400, PL‑600, AZ‑900) desirable

What’s on Offer

£75,000 base salary
Hybrid working with flexibility
Exposure to varied and challenging client projects
Continuous training and professional development
Support for Microsoft certifications
Clear progression pathways in a growing consultancy

DCS Recruitment and all associated companies are committed to creating a working environment where diversity is celebrated and everyone is treated fairly, regardless of gender, gender identity, disability, ethnic origin, religion or belief, sexual orientation, marital or transgender status, age, or nationality

Java Software Engineer into Architect
Computer Futures
Binfield
Fully remote
Mid - Senior
£450/day
RECENTLY POSTED

Hiring: Java Software Engineer

UK-Based | Remote | 12‑month contract | 450 per day

I’m currently supporting the search for a highly capable Java Software Engineer looking to transition into Architecture to join a major transformation programme, leading the migration from on‑prem services into Azure.

This isn’t a junior role in experience - we’re looking for someone with high-level architectural capability, strong communication skills, and the confidence to guide and oversee the work of experienced engineers.

What You’ll Be Doing

Supporting the Senior Architect across a large-scale cloud migration
Shaping data pipelines, data flows, and system-wide design
Providing architectural oversight to senior developers
Working across Java, Python and large data environments (design > coding)
Bringing a strong, assertive technical voice to ensure delivery stays on track

What we’re looking for:

✔ Strong Java engineering experience
✔ Exposure to cloud migration (Azure ideal)
✔ Knowledge of Python or big‑data environments is a bonus
✔ Confident communicator who can work across multiple technical teams

Please click to find out more about our Key Information Documents. Please note that the documents provided contain generic information. If we are successful in finding you an assignment, you will receive a Key Information Document which will be specific to the vendor set-up you have chosen and your placement.

To find out more about Computer Futures please visit

Computer Futures, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy | Registered office | 8 Bishopsgate, London, EC2N 4BQ, United Kingdom | Partnership Number | OC(phone number removed) England and Wales

Salesforce Developer
Charles Simon Associates Ltd
Multiple locations
Fully remote
Mid - Senior
£65,000 - £70,000
RECENTLY POSTED

Salesforce Developer – (Development, Apex, LWC, SalesCloud, ServiceCloud, Salesforce) – Permanent – Remote

Charles Simon Associates are currently recruiting for a Salesforce Developer one of our key clients who are a fast growing organisation where Salesforce sits at the core of the business. This is a great opportunity to join a small, highly effective Salesforce team and play a key role in delivering an ambitious product roadmap.

The successful candidate will take ownership of programmatic development within the Salesforce platform, working closely with the Salesforce Administrator and Product team to deliver new features, integrations and platform enhancements.

Location: Remote

Salary: Up to £70,000 per annum D.O.E

Skills/Requirements for the Salesforce Developer:

* Previous experience as a Salesforce Developer, a minimum of 5 years commercial experience

* Hands-on development using Apex, Triggers and Lightning Web Components (LWC)

* Experience working with Sales Cloud and Service Cloud

* Experience building and maintaining Salesforce integrations using APIs

* Experience working with Flows and Salesforce automation tools

* Strong understanding of Salesforce best practices and development standards

* Experience working with Jira and Agile / Kanban environments

* Ability to gather requirements and collaborate with business stakeholders

* Comfortable writing and reviewing technical specifications

Start date is ASAP for the Salesforce Developer

The Salesforce Developer will be responsible for:

* Developing and maintaining Apex classes, triggers and Lightning Web Components

* Working alongside the Salesforce Administrator to ensure best practice across the platform

* Taking ownership of release cycles, implementing and deploying new platform updates

* Building and maintaining Salesforce APIs and integrations with third-party systems

* Collaborating closely with product teams and stakeholders to deliver platform improvements

* Championing good engineering practices and development standards

* Communicating progress clearly across the team, including updating Jira boards

* Supporting the ongoing development and optimisation of the Salesforce CRM platform

About You:

* Enjoy working in a collaborative, agile team environment

* Comfortable working in a Kanban or Agile delivery model

* Proactive and resourceful with a problem-solving mindset

* Strong communicator who is comfortable engaging with stakeholders directly

* Able to work independently while contributing to team objectives

Please send an up-to-date copy of your CV to be considered for the Salesforce Developer

Salesforce Developer – (Development, Apex, LWC, SalesCloud, ServiceCloud, Salesforce) – Permanent – Remote

C#/.Net Developer/Software Engineer
MLR Associates
Woking
Hybrid
Senior - Leader
£45,000 - £65,000
RECENTLY POSTED
  • Global Award Winning Technology Brand
  • SaaS - Platform based Products
  • .Net C# Vue.JS HTML CSS AWS SQL
  • Woking Surrey/Hybrid Working
  • £45-55k salary + £10k bonus

Our client a global technology leader is currently looking for a .NET Developer to work with the dev team to guide the provision of Software Development for in-house award winning products.

Reporting to the Head of Development and working closely with all levels of the business, this role will be responsible for:-

  • Software Development Lifecycle: Manage all aspects of the SDLC to deliver Strategic objectives and maintain exceptional standard of software
  • Hands on Full Stack Architecture and Code development/coding
  • Leadership: Provide leadership and guidance to coach, motivate, and lead team of Software Engineers
  • Collaboration: work closely with Senior Stakeholders across the business to align goals and deliver the product vision
  • People Growth: support team to enable personal and technical progression
  • Continuous Improvement: spearhead improvement in process & practices to elevate Product Development
  • Resource Allocation: provide support where needed for the projects that move the organisation forwards.
  • Client Focus: Craft and implement development practices that meet client and business needs.

Beneficial Skills/Experience:

  • .NET 8
  • Vue.JS
  • Strong knowledge of HTML and CSS
  • CQRS/Mediator pattern
  • Microservices
  • AWS
Software Developer
Skills for Care
Multiple locations
Fully remote
Mid
£52,575
RECENTLY POSTED
+1

Job Title: Software Developer Hours: 36 hours (full time) Job Status: Fixed Term contract until 31 March 2027 Location: Home based with the expectation of travel within area and nationally where required Salary: £52,575.15?per annum Closing Date: 23.59pm on Wednesday 25 March 2026 Interview Date(s): 14 April 2026 Skills for Care the strategic workforce development and planning body for adult social care in England. We work with employers, Government and partners to ensure social care has the right people, skills and support required to deliver the highest quality care and support now and in the future. Find out more by looking at . Internally we call this role Digital Specialist (Developer).  The above job title is being used for external advertising purposes. Skills for Care has an exciting opportunity for a Software Developer to join our Workforce Intelligence team. The successful candidate will join our multi-disciplinary team working on our Adult Social Care Workforce Data Set (ASC-WDS) service. The service is a GDS assessed service, now in live running. The team follows Agile user-centered methods, working in 2-week sprints to develop and deploy as often as possible. You will be part of a team that provides a valued service to the care sector and to the Department of Health and Social Care. You should have experience with the most used technologies in our tech stack: Angular and Typescript for the front end SASS and the GDS design system for styling NodeJS with an Express API for the backend Postgres database Terraform for Infrastructure as Code Working in an Agile environment Our code is open source and we use Git and GitHub for source control. Shortlisted candidates will be asked to complete an online technical test as the first stage in the recruitment process, followed by a virtual (Teams) interview if successful at the first stage. If you are interested in this role, please access the full job description for further information and we look forward to receiving your application. At Skills for Care, we are committed to creating a culture of Belonging, where all of our People are able to contribute to their full potential. All our People are expected to contribute towards the achievement of our aspirations for equality, equity, diversity and inclusion. To find out more please check our (https://(url removed)/About-us/Equality-diversity-and-inclusion/Equality-diversity-and-inclusion.aspx). At Skills for Care, we want our People to be representative of the society we support, this includes all equality characteristics such as age, ethnicity, disability, sexual orientation, gender reassignment, religion or belief. This lived experience from a diverse group of people helps us with all the work that we do and ultimately supports the social care sector to provide the best quality care. We encourage applications from, but not limited to, people from minoritised ethnic backgrounds, people who identify as LGBTQ+ and people with disabilities. Candidates will always be selected based on experience and potential. --------------------------------------------------------------------------------------------------------------------------- Information about reasonable adjustments We want all applicants to be able to fully participate in our selection processes. We welcome requests for adjustments to our recruitment and selection processes from applicants with disabilities, impairments, or health conditions, and will always consider support available in the recruitment process. Please contact our People Team via email ((url removed)) to discuss any adjustments that you may need

Graduate Software Developer (Remote) C# / Cloud Training
S Merrick LTD
Multiple locations
Fully remote
Graduate
£24,000
RECENTLY POSTED
+3

Graduate Software Developer Fully Remote (UK) Tech Stack: C#, SQL Server, PHP, Azure, MVC Salary: £25,000 + Bonus Important: Applicants must already hold a completed First-Class Computer Science degree. Applications cannot be considered from candidates who: Are still studying or graduating in 2026 Require visa sponsorship now or in the future Hold a Student Visa or Graduate/PSW Visa Candidates must have full UK working rights . Start Your Career in Software Development A well-established financial services technology company is looking for a talented Computer Science graduate to join its development team. This is an excellent opportunity to begin your career in software development while receiving structured training in C#, PHP, SQL Server and Microsoft Azure . The role is fully remote, allowing you to work anywhere in the UK while collaborating closely with an experienced Agile development team. From day one you will work alongside developers who will mentor and support your technical development as you contribute to building real production systems used across the organisation. Technologies You Will Work With C# PHP SQL Server MVC frameworks jQuery CSS Microsoft Azure What We Are Looking For We are looking for graduates who enjoy solving technical problems and want to build a career in software development. Candidates should have: First-Class Computer Science degree Strong understanding of Object-Oriented Programming Programming experience with languages such as C#, Java, PHP, C++ or Python Good SQL or database querying skills Interest in cloud technologies such as Azure or AWS Strong communication skills and the ability to work effectively in a remote team Responsibilities Developing applications using C#, PHP and SQL Server Supporting the design and development of internal business systems Writing clean, maintainable and scalable code Working within an Agile development team Participating in testing, code reviews and technical discussions Learning modern cloud development practices using Microsoft Azure Full training and mentoring will be provided. What We Offer £25,000 starting salary Performance bonus scheme Salary review after probation Fully remote working anywhere in the UK Structured graduate training programme Dedicated time for learning and certifications Supportive engineering team and mentoring Health plan and home-office equipment If you are a First-Class Computer Science graduate looking to start your career in software development while working with experienced developers, we would love to hear from you. Please apply with your CV for the Graduate Software Developer Remote position. TPBN1\_UKTJ

Senior Software Engineer / Data Platform Engineer
Hays Technology
London
Remote or hybrid
Senior
£700/day - £750/day
RECENTLY POSTED

Your new company Working for a globally renowned financial organisation Your new role We're looking for a Senior Software/ Data Platform Engineer to help evolve a large‑scale financial data platform. The environment includes both long‑standing enterprise systems and modern AWS cloud services. The platform handles high‑volume structured data and supports internal systems and customer‑facing products. A big part of the role involves working with large SQL Server environments, so strong SQL skills are essential. You'll help modernise core systems, improve performance and reliability, and build scalable backend and data services. This role suits engineers who are comfortable working across legacy and modern architectures and who have strong experience designing and building reliable APIs and data services. What you'll need to succeed Great professional experience as a Senior Software/ Data Platform Engineer in financial services. Strong SQL Server expertise (queries, stored procedures, indexing, performance tuning) Experience with large relational datasets Backend development experience in Python or C# Some experience with designing API's Experience working in AWS environments Experience with complex enterprise or legacy systems Strong analytical and problem-solving skillsDesirable: You've modernising legacy systems Building data pipelines or ETL processes Using AI-assisted development tools Experience in financial or market data environments What you'll get in return Flexible working options available. What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. 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)

Principal Embedded Software Engineer IoT & Full-Stack
Gerrell & Hard
Bicester
Hybrid
Senior
Private salary
RECENTLY POSTED

Location: Hybrid / Bicester

Type: Permanent

Salary: Competitive, market-based

TUAL Technology is an innovative, VC-backed start-up based in Bicester, developing PowerUp a high-power EV charging solution designed for grid-constrained sites. By integrating battery storage, smart energy management, and ultra-fast DC charging, TUAL delivers seamless electrification where traditional grid capacity falls short. Working with enterprise customers across Europe, TUAL is transforming the productivity and profitability of electric commercial vehicle fleets through a portfolio of intelligent, software-defined, cloud and IoT-enabled charging solutions.

The Role Were looking for a hands-on Lead Software Engineer to own the design and delivery of our IoT and cloud software platform. Youll connect our ultra-fast chargers, manage data and remote control functions, and ensure security and scalability across our systems. Youll work directly with the VP Product and VP Power Electronics, shaping architecture, integrations and performance turning ideas into real, working solutions. ________________________________________ What Youll Do Build IoT and cloud software for charger connectivity and monitoring Create telemetry and data pipelines (PLC, CAN) Enable secure remote control and bi-directional communication (MQTT/WebSockets) Deliver OTA firmware updates and REST APIs (OCPP/OCPI) Develop secure, scalable cloud infrastructure (AWS IoT, Azure, etc.) Collaborate closely with hardware and IoT partners to integrate systems end-to-end ________________________________________ Your Background 5+ years experience in IoT software, cloud integration or embedded systems Strong skills in PLC, CAN, Modbus or similar protocols Proficiency in API and cloud development (AWS/Azure, MQTT, WebSockets) Knowledge of secure firmware updates and encryption (TLS, AES) Comfortable working autonomously in a fast-moving start-up environment Background in EV charging, energy storage or industrial automation is a plus ________________________________________ Why Join This is a chance to build the full IoT and cloud platform behind PowerUp from architecture to deployment. Youll shape a core technology in a growing, well-funded start-up tackling real-world challenges in electrification.

TPBN1_UKTJ

DevOps Engineer AWS / Python / Cloud Platform
Essential Consulting
Sheffield
Hybrid
Mid - Senior
Private salary
RECENTLY POSTED

We are supporting a Tier 1 financial institution in hiring a DevOps Engineer to join a specialist engineering team responsible for a cloud resilience platform used to protect critical applications running in public cloud environments.

  • Sheffield (Hybrid 3 days onsite)
  • Competitive day rate (Inside IR35)
  • Initial 6 month contract

This platform enables applications to recover from severe but plausible cyber events such as ransomware attacks and plays an important role in the organisations wider cloud security and resilience strategy.

The successful contractor will join an established DevOps and software engineering team responsible for building, scaling and operating the platform across AWS and GCP environments.

This role will suit a DevOps engineer with strong coding capability, ideally someone who originally came from a software engineering background.

Key Responsibilities

  • Supporting the build and maintenance of platform environments across AWS and GCP
  • Managing CI/CD pipelines and deployment automation
  • Supporting software releases through controlled enterprise production environments
  • Helping onboard internal applications onto the platform
  • Working closely with software engineers to support application lifecycle and deployment automation
  • Maintaining infrastructure and platform environments as adoption grows
  • Ensuring deployments comply with governance and release control frameworks
  • Supporting operational stability as the platform scales across regions

Key Requirements

  • Must have significant Tier 1 banking experience
  • Strong DevOps engineering background
  • Strong experience working with AWS cloud environments
  • Exposure to GCP is beneficial
  • Strong coding capability, ideally with Python
  • Experience working in environments where software engineering and DevOps overlap
  • Experience building and maintaining CI/CD pipelines
  • Comfortable working within regulated or enterprise environments
  • Strong collaboration skills and ability to work closely with engineering teams

Highly Desirable

  • Experience supporting internally built engineering platforms
  • Exposure to Go-based systems or environments

Location

This role is Sheffield based, with 3 days per week required onsite, this is a firm requirement therefore candidates should ideally live within a commutable distance of Sheffield.

Salesforce Developer
Ventula Consulting
Farnborough
Hybrid
Mid - Senior
£550/day
RECENTLY POSTED

Salesforce Developer/Technical Specialist - Automotive - £550 pd Inside IR35

Our client within the automotive sector is seeking an experienced Salesforce Developer/CRM Technical Specialist to support a major CRM transformation programme.

This role will work closely with the CRM SME on the data migration from Legacy CRM platforms and the build of new services within a modern, cloud-based IT landscape.

The successful candidate will be a hands-on technical specialist with strong database knowledge and proven experience delivering end-to-end CRM solutions across development, testing, and rollout.

Key Skills:

Strong database expertise, including:

  • Oracle
  • PostgreSQL
  • Proven experience delivering end-to-end CRM/application development
  • Hands-on experience with data migration and Legacy system decommissioning
  • Experience working with CRM platforms (Siebel experience highly beneficial)

Solid understanding of modern integration architectures, including:

  • AWS
  • APIs
  • Kafka integrations
  • Experience integrating cloud services with Legacy/on-prem Oracle environments
  • Automotive experience ideally

Rate: £550 per day Inside IR35

Duration: 3 months initially

Location: Hybrid/Farnborough (2 days per week on site)

This is an excellent opportunity to join a high-profile transformation programme within a globally recognised automotive environment, working on modern cloud-led architecture and large-scale CRM change.

Software Engineer
Convergence Group Ltd
Solihull
Hybrid
Mid - Senior
£65,000
RECENTLY POSTED
+1

At Convergence Group, we’ve spent over 20 years quietly powering some of the UK’s most complex networks – and now we’re growing fast. We’re looking for a Full Stack Software Engineer with strong C# skills to help us design and build the next generation of software that powers our business.

What it’s like here

The pace and intensity are higher than most environments in our sector. The workload is typically around 30% greater than many people will have experienced elsewhere - not because we are chaotic, but because we are ambitious and constantly building. We grow organically and through acquisition, continuously integrating, improving and raising the bar. The landscape evolves, priorities shift, and expectations rise. If you prefer a predictable, static environment, this probably won’t feel comfortable. If you are energised by growth, movement and high standards, it can be deeply rewarding.

Your strengths will have a bigger platform here - and you will be stretched behaviourally more than in most environments. We value respectful honesty: anyone can challenge an idea, hierarchy doesn’t protect thinking and getting it right matters more than being right. Ego doesn’t perform well here; curiosity, learning and ownership do. We hire people who are already strong at their craft - the stretch at Convergence Group is navigating pace, complexity and constant evolution. This environment isn’t for everyone, but for the right person it offers an exceptional opportunity for impact, growth and accelerated development.

What you’ll be doing as our Software Engineer

Build and maintain high-quality, scalable web applications using C#, JavaScript, web development frameworks and libraries (e.g. React, Next.js, Blazor), and Azure services.

Design intuitive front-end experiences and robust back-end logic with seamless client-server integration.

Implement new features using frameworks, databases and API integration and management.

Ensure software quality with unit, integration, and automated testing.

Collaborate in Agile environments (e.g. Scrum or Kanban) - participating in standups, sprint planning, and delivery.

Troubleshoot, debug, and resolve application issues.

Engage in code reviews and QAT to maintain standards, knowledge sharing, and continuous learning.

Drive improvements across the SDLC: tools, pipelines, architecture, and documentation.

What we’re looking for

A minimum of 5 years’ experience of C#

Strong knowledge of JavaScript, HTML/CSS, and modern frameworks (React, Blazor, Next.js).

Experience working knowledge of Azure cloud services and SQL databases.

A solid grasp of CI/CD pipelines and automated testing frameworks.

Comfort with Agile methodologies (Scrum or Kanban) and working in fast-moving teams.

Effective communicator who can translate complex technical ideas to both developers and stakeholders.

Excellent attention to detail.

Experience in producing & consuming technical documentation e.g user stories, database schemas, system guides.

Bonus points for experience with IT service management tools like ServiceNow or working within a fast-paced SME environment.

What you’ll get

Salary: £55,000 - £65,000 for experienced A players.

Time off: 33 days holiday, including bank holidays (and yes, it gets better).

Benefits: Private Medical, enhanced Pension, Income Protection & Life Assurance.

Work-life balance: flexible core hours + hybrid working with 3 days a week in the Solihull office.

Dog friendly office - yes really!

Who are Convergence Group?

At Convergence Group, we break free from corporate red tape as a privately-owned company, driving bold innovation without the constraints of private equity or external bankers. Experts in Wan, Lan, WiFi and Security solutions we stand out by revolutionising infrastructure management – making it seamless so our customers can focus on what matters most. With rapid growth ahead, we need exceptional talent who bring the right skills, attitude, and drive to shape the future with us.

Where A-Players Come to Make a Difference

If you’re a C# Software Engineer who thrives on tackling complex systems, writing clean, maintainable code, and collaborating with a smart, high-performing team, we want to hear from you. Join us and take ownership of solutions that shape the future of connectivity, in an environment where your skills, curiosity, and drive will be stretched — and rewarded. Apply now to make an impact and grow your career with Convergence Group.

TPBN1_UKTJ

Senior Software Engineer C# .Net - Hedge Fund
client server
London
In office
Senior
£100,000
RECENTLY POSTED

Senior Software Engineer / Developer (C# .Net) London onsite to £150k

Join a global hedge fund specialising in sports trading as a Senior Software Engineer, working on high-performance, real-time trading systems. You’ll own greenfield projects, partner directly with quants and strategy teams and build low-latency backend components and APIs with C# .Net, plus occasional frontend work in React.

What you’ll do:

Design and develop real-time trading and pricing systems

Lead greenfield feature builds with significant business impact

Build backend services, APIs and trading engine components in C#

Collaborate closely with strategy, quant and engineering teams

Tech: C# .Net, ASP.Net, SQL / Oracle, JavaScript, React

Location:

You’ll be based in plush City office on a fulltime basis, Monday to Friday.

About you:

You have expertise with C# .Net, ASP.Net development

You have a strong knowledge of databases (SQL or Oracle)

You’re comfortable with JavaScript / React

You have a thorough knowledge of Computer Science fundamentals such as OOP, Design Patterns, Data Structures, Algorithms

You are collaborative with excellent communication and stakeholder management skills

You are degree educated in Computer Science or similar technical discipline

What’s in it for you:

As a Senior Software Engineer / Developer you will receive a competitive package:

Salary to £150k

Bonus paid every six months based on personal performance (10-25%)

Professional development

Pension

Health Insurance

Gym membership

Social events, free fruit, snacks, coffee etc.

Apply now to find out more about this Senior Software Engineer / Developer (C# .Net) opportunity.

At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We’re an equal opportunities employer whose people come from all walks of life and will never discriminate based on race, colour, religion, sex, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. The clients we work with share our values.

TPBN1_UKTJ

Senior AI Engineer
Adria Solutions Ltd
Manchester
Hybrid
Senior
£70,000 - £85,000
RECENTLY POSTED

We re looking for a hands-on Senior AI Engineer to build real-world AI systems that deliver measurable impact across customer journeys and internal operations. This role is all about turning emerging AI capabilities-LLMs, agentic systems, ML models, workflows, and AI services-into robust, production-ready solutions.

What You ll Do

  • Design, build, and integrate AI applications into end-to-end workflows.
  • Embed agentic AI into customer and operational processes with reliability, resilience, and safe fallback behavior.
  • Collaborate with Product, Engineering, Data, and Operations to take AI solutions from concept to production.
  • Establish best practices for orchestration, testing, monitoring, and operational safeguards.
  • Evaluate emerging AI capabilities and translate them into practical, high-value implementations.

What We re Looking For

  • Strong software engineering background (Python), with experience delivering production AI or ML-integrated systems.
  • Hands-on experience with LLMs, AI services, or agentic AI frameworks.
  • Practical understanding of AI production concerns: latency, resilience, observability, safety, and maintainability.
  • Systems thinker who collaborates effectively across teams and communicates clearly.
  • Passion for applied AI and agentic systems, with a focus on turning capabilities into tangible outcomes.

Bonus if you have: AWS AI/ML experience, building autonomous workflows, regulated industry exposure, or contributions to the AI community.

Benefits:

  • Training and development budgets
  • A culture of collaboration and growth so your career can become what you want it to be.
  • Hybrid working balance of remote working and on-site to suit your work/life balance.

Join us and help shape the future of AI-driven systems in a fast-moving, hands-on environment.

Interested? Please Click Apply Now Senior AI Engineer (Agentic AI) Applied AI in Production

Senior AI Engineer (Agentic AI) Applied AI in Production

Contract Algo Trading Java Developer - eTrading, low latency, Java APIs, Multithreading, FIX
Scope AT Limited
London
Hybrid
Mid - Senior
Private salary
RECENTLY POSTED

Our Investment Banking client is looking for an Algo trading Java developer to join the team to work on new initiatives and support for business critical algorithmic trading engines. The team provides innovative solutions for low touch, low latency trading, which includes FIX connectivity, low latency market connectivity, smart order routing, algorithmic trading and internal crossing.

The requirement is for a core Java developer. The team is working on a number of algorithmic engines that support benchmark algos, smart order routing and internal crossing.

The main responsibilities of this role include:

  • Delivery of key functional changes to the ETT strategy engines
  • Delivery of core framework-level changes
  • Interaction with quantitative trading group/quantitative traders to capture core requirements
  • In depth understanding of core Java API’s (collections, concurrency, NIO etc.)
  • Have an understanding of and experience with multithreaded systems, working knowledge of the Java garbage collector, familiar with low latency I/O.
  • Understanding of and experience with design patterns (Observer, Factory, Singleton etc.)
  • Development practices - Must be able to use test driven development and be familiar with UML and OO design.
  • Understanding of benchmark algo and/or smart routing strategies (VWAP, TWAP, Arrival Price etc.)
  • Demonstrable experience of Front Office system design and architecture (algo trading plant and topology)
  • Business Knowledge - Understanding of equities and/or derivatives markets.
  • Knowledge of FIX (heartbeating, login, sequence numbers, message types etc.)

Initial 12 month contract, hybrid working, inside IR35 role

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Senior Full Stack Developer (Python/Vue.js)
Quast Ltd
Yorkshire
Hybrid
Senior
£50,000 - £75,000
RECENTLY POSTED

Location: Hybrid - Leeds City Centre (LS1 5JL). Predominantly remote with occasional attendance for workshops and sprint events.

Salary: £50,000 - £75,000 depending on experience

Employment Type: Permanent

About the Opportunity

Our client is a global leader in enterprise digital and cloud transformation, operating across more than 40 countries. They are expanding a UK technology team delivering large-scale digital services across the public sector, including major health and government programmes.

We are looking for a Senior Full Stack Developer who enjoys solving complex technical problems and working within collaborative Agile delivery teams.

You’ll work across the stack - Python on the Back End, Vue.js on the Front End, and AWS infrastructure supporting modern cloud-native services.

This role suits engineers who can take ownership of delivery, work comfortably within complex environments, and support less experienced developers within the team.

Role Overview

You will contribute to the design, development and optimisation of modern digital services used within the UK public sector.

Working within Agile teams, you’ll collaborate closely with developers, architects, testers and delivery managers to deliver high-quality software within complex client environments.

Key Responsibilities

  • Design, build and maintain robust Back End services and APIs using Python
  • Develop responsive Front End applications using Vue.js (React experience also valuable)
  • Work within AWS environments to deploy and maintain cloud-based services
  • Contribute to CI/CD pipelines and automated testing practices
  • Participate actively in Agile ceremonies including sprint planning and retrospectives
  • Collaborate with both technical and non-technical stakeholders across delivery teams
  • Support junior developers through mentoring and code review

Skills & Experience

Essential

  • Strong commercial experience developing Back End systems using Python
  • Commercial experience with a modern JavaScript framework (Vue.js or React)
  • Hands-on experience working within AWS environments
  • Experience contributing to CI/CD pipelines and modern development practices
  • Experience working within Agile software delivery teams
  • Strong communication skills and ability to operate within client-facing environments

Desirable

  • Experience delivering technology within the UK public sector
  • Experience working on health sector programmes or NHS-related projects
  • Experience working within complex enterprise or government technology environments
  • Exposure to event-driven architectures or modernisation of Legacy platforms
Oracle EBS HCM Technical Consultant
Qualient Technology Solutions UK Limited
Yorkshire
Hybrid
Senior
Private salary
RECENTLY POSTED
TECH-AGNOSTIC ROLE

We are Looking for Oracle EBS HCM Technical Consultant based in leeds, UK/Canary Wharf, UK which is Hybrid.

Experience: 8-10 Years

Job Summary

We are looking for an experienced Oracle EBS HCM Technical Consultant with strong expertise in Oracle E-business Suite HCM modules and deep technical skills in Oracle PL/SQL, Custom Forms, Reports, and Fast Formulas. The ideal candidate will have hands-on experience in developing, customizing, and supporting Oracle EBS HCM solutions.

Key Responsibilities

  • Design, develop, and support technical solutions within Oracle EBS HCM modules.
  • Develop complex PL/SQL packages, procedures, functions, triggers, and performance tuning.
  • Build and maintain Custom Forms and Oracle Reports using Oracle Developer Suite.
  • Develop and maintain Fast Formulas for payroll, benefits, and HR processes.
  • Work on data conversions, interfaces, and integrations with external systems.
  • Provide technical support for HR modules, troubleshooting issues and resolving defects.
  • Collaborate with functional consultants to translate business requirements into technical specifications.
  • Ensure adherence to coding standards, documentation, and best practices.

Required Skills

  • Strong experience in Oracle EBS HCM modules such as:
  • Core HR
  • Payroll
  • Absence Management
  • Benefits, etc
  • Expertise in Oracle PL/SQL development.
  • Experience in Oracle Forms and Oracle Reports development.
  • Strong knowledge of Fast Formula development and customization.
  • Experience with EBS APIs, Open Interfaces, and Concurrent Programs.
  • Understanding of HR and Payroll business processes.
  • Ability to troubleshoot and optimize existing code and processes.
Backend Software Engineer - Python
Opus Resourcing Ltd
Reading
Hybrid
Junior - Mid
£50,000 - £75,000
RECENTLY POSTED

Software engineer with sound Back End Python skills is required to join the R&D, product-centric engineering team in Reading, Berkshire, for a world-leading company specialising in secure video collaboration technology, where software quality, collaboration, and continuous improvement are central to everything they do. The role is based in Reading, UK, and involves working closely with teams across the UK and Europe, with occasional travel.

Location: Reading, with some office presence to be part of the team. Salary Circa £50-75k + Bens + Stock

Key skills required for the Software Engineer role - Python/Distributed Systems

  • Strong commercial experience Circa 2-5 years developing performant Back End systems in Python OR C OR C++ OR Rust
  • Experience or strong interest in asynchronous and network programming
  • Exposure to some of distributed systems, networking and Client Server architectures
  • Comfortable working in Linux-based development environments
  • Interest in learning systems programming languages such as C, C++ or Rust
  • Familiarity with virtualisation platforms (VMware, KVM, Hyper-V) and/or cloud environments (AWS, Azure, GCP)
  • A quality-driven mindset, with experience in unit, integration, and system testing
  • Excellent written and spoken English, with the ability to discuss complex technical concepts clearly
  • Bachelor’s degree in Computer Science or a related STEM subject from a red brick University (or equivalent experience)

What you’ll do as a Software Engineer - Python/Distributed Systems

  • Collaborate with a highly skilled, globally distributed engineering team
  • Design, build, and maintain core components of a Real Time video platform
  • Contribute to distributed systems used by hundreds of thousands of users worldwide
  • Solve complex, meaningful technical challenges in a production environment
  • Continuously improve software quality through testing, automation, and best practices

Why this role as a Software Engineer - Python/Distributed Systems?

  • Engineering-led culture - strong focus on software quality, test automation, and clean design
  • Growth mindset - ongoing learning and development opportunities, working with cutting-edge distributed systems
  • Inclusive, people-first environment - diverse perspectives are actively encouraged and valued
  • Real ownership - your work is visible, impactful, and tied directly to product success
  • Purpose-driven technology - enabling secure, seamless communication for critical use cases worldwide

Backgrounds could include security, telecoms, video, networking, media, and Real Time or distributed systems, including Client Server systems.

Opus Resourcing acts as an employment agency with respect to permanent employment.

Apply now or message us for more details. Referrals always welcome!

Geospatial Software Engineer
ISR Recruitment Ltd
London
Remote or hybrid
Mid - Senior
Private salary
RECENTLY POSTED
+5

The Opportunity:

You’ll join an experienced, collaborative consultancy team delivering greenfield, enterprise-scale digital services for high-profile public and private sector clients.

This opportunity is ideal for a practical, adaptable Geospatial Software Engineer who enjoys working across disciplines and solving complex problems and challenges that will have a real-world impact.

Collaboration sits at the heart of how our client operates, so you’ll be partnering closely with colleagues across Software Engineering, User-Centred Design, Delivery Management, Data Science and Live Services to deliver outcomes that genuinely make a difference in today’s society.

As a consultancy, they are technology-agnostic by design, focusing on choosing the right tools for each problem, rather than forcing one stack everywhere.

Their teams regularly work with .NET, Java, Python, Node.js, AWS and Azure, giving you genuine scope to broaden your skills and develop your career across a range of languages and platforms.

Many of their projects also involve Geographic Information Systems (GIS) and open-source geospatial technologies, helping clients unlock the value of location-based data through mapping, spatial analysis and data-driven decision making.

Skills and Experience:

Essential

  • 3+ years’ experience in a Full Stack Engineering role
  • Strong development skills in .NET, Java or Python, alongside modern JavaScript frameworks/libraries
  • Experience working in Agile environments (Scrum, Kanban, TDD)
  • Solid understanding of architectural and design patterns, including microservices and serverless
  • Hands-on experience designing and delivering solutions on AWS or Azure
  • Experience working with GIS systems or geospatial data, and familiarity with tools such as Leaflet, OpenLayers, QGIS, GeoServer, PostGIS, etc.
  • A collaborative mindset and experience working in multi-disciplinary teams

Desirable

  • Experience working in a consultancy environment
  • Exposure to public sector projects
  • Familiarity with CI/CD tooling (eg Jenkins, Terraform)
  • Awareness of the Digital Service Standard and Technology Code of Practice, particularly in geospatial or public sector contexts

Role and Responsibilities:

This is a varied role suited to someone who enjoys the pace, responsibility and collaboration of consultancy.

You will be involved with the following types of activity:

  • Design and deliver high-quality solutions: building, enhancing and maintaining software, infrastructure and deployment pipelines that are robust, secure and scalable. Projects may include solutions involving geospatial data, GIS platforms and open-source mapping tools.
  • Work collaboratively across disciplines: partnering with Senior and Lead Engineers, Delivery Managers, Designers and Data Scientists to shape solutions, contribute to technical documentation and deliver against agreed plans.
  • Apply standards and best practice: follow established engineering approaches, contribute accurate technical estimates and proactively identify and escalate risks or issues.
  • Communicate clearly and build relationships: present ideas, prototypes and progress updates to stakeholders, while building strong working relationships with colleagues, clients and partner organisations.

Applications:

Please contact Edward here at ISR to learn more about our client and how they are leading the way in developing the next generation of technical solutions through innovation and transformational technology?

Graduate Software Developer - C#/SQL - Remote
Scott-Merrick
Multiple locations
Fully remote
Graduate
£25,000
RECENTLY POSTED
+1

Graduate Software Developer - Fully Remote (UK)
Tech Stack: C#, SQL Server, PHP, Azure, MVC
Salary: £25,000 + Bonus

Important: Applicants must already hold a completed First-Class Computer Science degree.

Applications cannot be considered from candidates who:

  • Are still studying or graduating in 2026
  • Require visa sponsorship now or in the future
  • Hold a Student Visa or Graduate/PSW Visa

Start Your Career in Software Development

A well-established financial services technology company is looking for a talented Computer Science graduate to join its development team.This is an excellent opportunity to begin your career in software development while receiving structured training in C#, PHP, SQL Server and Microsoft Azure.

The role is fully remote, allowing you to work anywhere in the UK while collaborating closely with an experienced Agile development team. From day one you will work alongside developers who will mentor and support your technical development as you contribute to building real production systems used across the organisation.

Key Technologies you will be trained in:

  • C#:
  • PHP
  • SQL Server
  • MVC frameworks
  • jQuery
  • CSS
  • Microsoft Azure

Requirements:

  • A First-Class Computer Science degree
  • Strong understanding of Object-Oriented Programming
  • Programming experience with languages such as C#, Java, PHP, C++ or Python
  • Good SQL or database querying skills
  • Interest in cloud technologies such as Azure or AWS
  • Strong communication skills and the ability to work effectively in a remote team

Responsibilities:

  • Developing applications using C#, PHP and SQL Server
  • Supporting the design and development of internal business systems
  • Writing clean, maintainable and scalable code
  • Working within an Agile development team
  • Participating in testing, code reviews and technical discussions
  • Learning modern cloud development practices using Microsoft Azure

Full training and mentoring will be provided.

Benefits - As well as a great training program, you will be offered:

  • £25,000 starting salary, Performance bonus scheme, Salary review after probation, Fully remote working anywhere in the UK, Dedicated time for learning and certifications, Supportive engineering team and mentoring, Health plan and home-office equipment.

If you are a First-Class Computer Science graduate looking to start your career in software development while working with experienced developers, we would love to hear from you.

Please apply with your CV for the Graduate Software Developer - Remote position.

Frequently asked questions
Haystack features a wide range of Backend Engineer positions, including roles in startups, mid-sized companies, and large enterprises, covering various industries such as finance, healthcare, e-commerce, and more.
Common programming languages for Backend Engineer roles on Haystack include Java, Python, Ruby, Go, Node.js, and C#. Job postings typically specify the preferred languages and frameworks.
Yes, Haystack allows you to filter Backend Engineer job listings based on remote, hybrid, or on-site work options to help you find roles that match your work location preferences.
Absolutely. Haystack includes Backend Engineer job listings for various experience levels, including entry-level, mid-level, and senior positions, making it easier for candidates at all stages to find suitable roles.
To apply for Backend Engineer jobs, simply create an account on Haystack, upload your resume, and submit applications directly through the platform. Some listings may also redirect you to the employer's application portal.