Date posted
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Locations
7 Contract API jobs in Portsmouth + 20 miles
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Senior Software Developer
Senior Software Developer
Spectrum It Recruitment Limited
Southampton (SO14)
£65000 - £70000 per annum + Bonus & Benefits
Experience creating RESTful APIs and ensuring API extensibility
Experience creating RESTful APIs and ensuring API extensibility
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Gauging and sampling shore tanks in accordance with API, IP, company or other procedures.
Gauging and sampling shore tanks in accordance with API, IP, company or other procedures.
PREMIUM
Backend API development, ideally with Express, Nest.js or similar
Backend API development, ideally with Express, Nest.js or similar
NEW
Application Support Engineer
Application Support Engineer
Spectrum It Recruitment Limited
Fareham (PO14)
£30000 - £35000 per annum + Benefits
Hybrid Working - Fareham, Hampshire £30,000 - £35,000 - We're looking for a driven Application Support Engineer to join my client and help deliver exceptional support for business-critical applications. If you enjoy problem-solving, working with clients, and collaborating with developers to deliver real solutions-this could be the role for you. What You'll Be Doing * Providing technical support and resolving application issues within agreed SLAs * Troubleshooting and managing client tickets from start to resolution * Working closely with stakeholders, analysts, and developers * Communicating clearly with clients and delivering excellent customer service * Gathering requirements for system changes (RFCs) and supporting their delivery * Testing, documenting, and supporting application updates * Assisting with debugging and implementing improvements (training provided)
Hybrid Working - Fareham, Hampshire £30,000 - £35,000 - We're looking for a driven Application Support Engineer to join my client and help deliver exceptional support for business-critical applications. If you enjoy problem-solving, working with clients, and collaborating with developers to deliver real solutions-this could be the role for you. What You'll Be Doing * Providing technical support and resolving application issues within agreed SLAs * Troubleshooting and managing client tickets from start to resolution * Working closely with stakeholders, analysts, and developers * Communicating clearly with clients and delivering excellent customer service * Gathering requirements for system changes (RFCs) and supporting their delivery * Testing, documenting, and supporting application updates * Assisting with debugging and implementing improvements (training provided)
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QA Engineer (Junior-Mid Level) Location: Fareham, Hampshire (Full-Time, On-Site) Salary: £30,000 - £40,000 - I'm partnering with a fast-growing pet-tech business building smart, connected products used by hundreds of thousands of pet owners globally. As they scale, they're looking to hire a QA Engineer to play a key role in ensuring the quality and reliability of their products. The Opportunity - This role is well-suited to a junior to mid-level QA Engineer looking to develop in a product-focused environment. You'll work across mobile (Flutter), web applications, and internal tools, with a strong emphasis on manual testing and a clear pathway into automation or development. You'll collaborate closely with engineering and design teams, contributing directly to the quality of features before they reach end users. Key Responsibilities
QA Engineer (Junior-Mid Level) Location: Fareham, Hampshire (Full-Time, On-Site) Salary: £30,000 - £40,000 - I'm partnering with a fast-growing pet-tech business building smart, connected products used by hundreds of thousands of pet owners globally. As they scale, they're looking to hire a QA Engineer to play a key role in ensuring the quality and reliability of their products. The Opportunity - This role is well-suited to a junior to mid-level QA Engineer looking to develop in a product-focused environment. You'll work across mobile (Flutter), web applications, and internal tools, with a strong emphasis on manual testing and a clear pathway into automation or development. You'll collaborate closely with engineering and design teams, contributing directly to the quality of features before they reach end users. Key Responsibilities
Principal Software Engineer - Python
Principal Software Engineer - Python
Parent TEST TJ Company 1
Chandler's Ford, Eastleigh (SO53), SO53 3QB
65000
Title:Principal Software Engineer Python - Department:Procode IT - Location:Hybrid Commutable distance of either Chandlers Ford or Oxford - Salary:Circa £65k +DiscretionaryBonus Scheme - Sponsorship:Unfortunately, we are unable to offer sponsorship for this role - Ifyou'rea Principal Software Engineer, who enjoys architecting complex systems, owning technical decisions, and crafting Python-powered solutions that make a real impact to customers, then this might be the role for you! Step into a role where your technical vision truly shapes the future! About us - We are a leading UK technology company delivering transformative, data driven solutions for the energy sector and beyond. With two decades of experience, we help organisations unlock the power of smart data to improve efficiency, reduce cost to serve, and enhance customer experience.
Title:Principal Software Engineer Python - Department:Procode IT - Location:Hybrid Commutable distance of either Chandlers Ford or Oxford - Salary:Circa £65k +DiscretionaryBonus Scheme - Sponsorship:Unfortunately, we are unable to offer sponsorship for this role - Ifyou'rea Principal Software Engineer, who enjoys architecting complex systems, owning technical decisions, and crafting Python-powered solutions that make a real impact to customers, then this might be the role for you! Step into a role where your technical vision truly shapes the future! About us - We are a leading UK technology company delivering transformative, data driven solutions for the energy sector and beyond. With two decades of experience, we help organisations unlock the power of smart data to improve efficiency, reduce cost to serve, and enhance customer experience.
NEW
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You will have extensive experience across user acceptance testing, regression, end-to-end and API testing, as well as working with data at a SQL level where required.
You will have extensive experience across user acceptance testing, regression, end-to-end and API testing, as well as working with data at a SQL level where required.
84 exact matches jobs are outside your preferred location
Senior Full Stack Developer (TypeScript / Vue.js / C# / .NET) Fully Remote (UK-based) Contract Outside IR35 - Long-Term Contract - Competitive Day Rate - Were working with a well-established organisation undergoing a major platform transformation programme, and theyre looking to add an experienced Full Stack Developer to the team. This role will suit someone who enjoys owning features end-to-end, with strong frontend expertise while remaining comfortable working across APIs, databases, and backend services in a modern environment. What Youll Be Doing * Developing and enhancing customer-facing platforms and transactional systems * Building modern applications using Vue.js and TypeScript * Working closely with product, QA, and engineering teams to deliver new features * Investigating and resolving production issues across frontend, APIs, and databases
Senior Full Stack Developer (TypeScript / Vue.js / C# / .NET) Fully Remote (UK-based) Contract Outside IR35 - Long-Term Contract - Competitive Day Rate - Were working with a well-established organisation undergoing a major platform transformation programme, and theyre looking to add an experienced Full Stack Developer to the team. This role will suit someone who enjoys owning features end-to-end, with strong frontend expertise while remaining comfortable working across APIs, databases, and backend services in a modern environment. What Youll Be Doing * Developing and enhancing customer-facing platforms and transactional systems * Building modern applications using Vue.js and TypeScript * Working closely with product, QA, and engineering teams to deliver new features * Investigating and resolving production issues across frontend, APIs, and databases
Champion the use of strategic platforms such as ENSEK Ignition and shared integration/API frameworks.
Champion the use of strategic platforms such as ENSEK Ignition and shared integration/API frameworks.
PREMIUM
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Solutions Architect (Business Systems)
Solutions Architect (Business Systems)
Dignity Funerals Limited
Boyn Hill, Maidenhead (SL6), SL6 5AA
Up to £75,000 per annum
Drive modern integration approaches (API-first, event-driven, cloud-native)
Drive modern integration approaches (API-first, event-driven, cloud-native)
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QA Engineer Automation
QA Engineer Automation
Halian Technology Limited
Maidenhead Thicket, Maidenhead (SL6)
Up to £400 per day
API testing and backend validation
API testing and backend validation
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Connectivity: Design PL/SQL interfaces to handle RESTful API operations.
Connectivity: Design PL/SQL interfaces to handle RESTful API operations.
FEATURED
Experience with REST API design and MCP integration patterns
Experience with REST API design and MCP integration patterns
Experience in creating front end and API automated test projects
Experience in creating front end and API automated test projects
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Developer C#, .NET
Developer C#, .NET
Gold Group
East Grinstead (RH19)
£47500.00 - £52000.00 per annum + + benefits, Hybrid WFH
ASP.NET MVC4 / ASP.NET Core (MVC / API)
ASP.NET MVC4 / ASP.NET Core (MVC / API)
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AI Software Engineer, Firebase, GCP, COR7557B
AI Software Engineer, Firebase, GCP, COR7557B
Corriculo Ltd
Reading, Berkshire, RG1
£75k - 100k per year + Stock Options
Building on Firebase, using Claude API and leading LLMs, the AI Software Engineer will build the end-to-end architecture, security, performance and integration.
Building on Firebase, using Claude API and leading LLMs, the AI Software Engineer will build the end-to-end architecture, security, performance and integration.
Build and manage secure API bridges to link platforms and allow them to share data efficiently.
Build and manage secure API bridges to link platforms and allow them to share data efficiently.
FEATURED
The business develops and operates a suite of high-traffic digital products, including web, mobile, and API-driven services used by millions of users globally.
The business develops and operates a suite of high-traffic digital products, including web, mobile, and API-driven services used by millions of users globally.
Build and maintain test automation frameworks covering UI, API, and service-level validation * Solid API and UI automation experience (e.g. Playwright, Cypress, or similar)
Build and maintain test automation frameworks covering UI, API, and service-level validation * Solid API and UI automation experience (e.g. Playwright, Cypress, or similar)
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QA Engineering Lead SaaS
QA Engineering Lead SaaS
Client Server
Underhill Park, Reigate (RH2), RH2
£100000 - £130000 per annum + bonus + benefits
You have experience with C# test automation frameworks at all levels (unit, integration, API/system)
You have experience with C# test automation frameworks at all levels (unit, integration, API/system)
NEWPREMIUM
Senior Full Stack Engineer - Role Type: Permanent - Location: Maidenhead (Hybrid - 3 days a week) Here at Dignity Funerals, a purpose-driven organisation committed to supporting families at life's most important moments, we're looking for a Senior Full Stack Engineer to help shape and deliver the next generation of digital experiences. This is a role for a hands-on technical leader who thrives on solving complex challenges while elevating those around them. You'll play a key role in driving engineering excellence, mentoring others, and shaping the future of our tech landscape. What you'll be doing * Own & deliver complex, scalable solutions across the full stack * Drive technical direction - influence architecture, tooling, and long-term strategy * Code with impact - tackling ambiguous problems with high-quality, maintainable solutions
Senior Full Stack Engineer - Role Type: Permanent - Location: Maidenhead (Hybrid - 3 days a week) Here at Dignity Funerals, a purpose-driven organisation committed to supporting families at life's most important moments, we're looking for a Senior Full Stack Engineer to help shape and deliver the next generation of digital experiences. This is a role for a hands-on technical leader who thrives on solving complex challenges while elevating those around them. You'll play a key role in driving engineering excellence, mentoring others, and shaping the future of our tech landscape. What you'll be doing * Own & deliver complex, scalable solutions across the full stack * Drive technical direction - influence architecture, tooling, and long-term strategy * Code with impact - tackling ambiguous problems with high-quality, maintainable solutions
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Permanent - Location: Home / Andover (onsite 2 days a week) Salary: £100,000 - £120,000 (+ benefits) Skills: Technical Architecture, Azure/AWS, DevOps, Secure Development, Microservices, APIs, SC Clearance - We are looking to recruit an SC Cleared Technical Architect for a leading technology consultancy. This is a high-impact role, working across the full delivery lifecycle to design and deliver complex, secure, and scalable solutions aligned to business and technical strategy. Location: Andover (2 days per week onsite) Clearance: Active SC required - Key Responsibilities * Own the technical design of large and complex systems * Provide architecture governance and technical leadership across delivery teams * Collaborate with multi-disciplinary teams to ensure solutions meet business and technical needs * Define and apply architecture principles, standards and best practice
Permanent - Location: Home / Andover (onsite 2 days a week) Salary: £100,000 - £120,000 (+ benefits) Skills: Technical Architecture, Azure/AWS, DevOps, Secure Development, Microservices, APIs, SC Clearance - We are looking to recruit an SC Cleared Technical Architect for a leading technology consultancy. This is a high-impact role, working across the full delivery lifecycle to design and deliver complex, secure, and scalable solutions aligned to business and technical strategy. Location: Andover (2 days per week onsite) Clearance: Active SC required - Key Responsibilities * Own the technical design of large and complex systems * Provide architecture governance and technical leadership across delivery teams * Collaborate with multi-disciplinary teams to ensure solutions meet business and technical needs * Define and apply architecture principles, standards and best practice
NEW
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Closing date: 23rd June 2026 - Location: RG7 4PR, located between Reading and Basingstoke, with free onsite parking. Package: £61,460 - £95,000 (depending on your suitability, qualifications, and level of experience) Working pattern: AWE operates a 9-day working fortnight. We will consider flexible working requests so that your work may fit in with your lifestyle. Just let us know your preferred working pattern on your application. Ready to play your part? At AWE, it's not just a job, it's far more than that. Our shared purpose is to help keep the nation safe. Could this role be the opportunity for you to play your part? * Lead AWE's enterprise AI delivery, turning prototypes into secure, scalable AI solutions that drive innovation and efficiency across the organisation. * Lead a cross-functional AI engineering team, providing technical and team leadership for enterprise AI ...
Closing date: 23rd June 2026 - Location: RG7 4PR, located between Reading and Basingstoke, with free onsite parking. Package: £61,460 - £95,000 (depending on your suitability, qualifications, and level of experience) Working pattern: AWE operates a 9-day working fortnight. We will consider flexible working requests so that your work may fit in with your lifestyle. Just let us know your preferred working pattern on your application. Ready to play your part? At AWE, it's not just a job, it's far more than that. Our shared purpose is to help keep the nation safe. Could this role be the opportunity for you to play your part? * Lead AWE's enterprise AI delivery, turning prototypes into secure, scalable AI solutions that drive innovation and efficiency across the organisation. * Lead a cross-functional AI engineering team, providing technical and team leadership for enterprise AI ...
FEATURED
Description - Join us, be part of more. We're so much more than an energy company. We're a family of brands revolutionising how we power the planet. We're energisers. One team of 21,000 colleagues that's energising a greener, fairer future by creating an energy system that doesn't rely on fossil fuels, whilst living our powerful commitment to igniting positive change in our communities. Here, you can find more purpose, more passion, and more potential. That's why working here is #MoreThanACareer. We do energy differently - we do it all. We make it, store it, move it, sell it, and mend it. Centrica, Technology is a core driver of how we deliver our strategy. You'll join a team modernising our platforms, strengthening cyber and operational resilience, and advancing a product-led way of working that brings engineers, data specialists and business experts together to deliver ...
Description - Join us, be part of more. We're so much more than an energy company. We're a family of brands revolutionising how we power the planet. We're energisers. One team of 21,000 colleagues that's energising a greener, fairer future by creating an energy system that doesn't rely on fossil fuels, whilst living our powerful commitment to igniting positive change in our communities. Here, you can find more purpose, more passion, and more potential. That's why working here is #MoreThanACareer. We do energy differently - we do it all. We make it, store it, move it, sell it, and mend it. Centrica, Technology is a core driver of how we deliver our strategy. You'll join a team modernising our platforms, strengthening cyber and operational resilience, and advancing a product-led way of working that brings engineers, data specialists and business experts together to deliver ...
PREMIUM
Senior AI Engineer (LLMs, Python & Java)
Senior AI Engineer (LLMs, Python & Java)
Halian Technology Limited
Bracknell (RG12)
£95,000 per annum Bonus and benefits
Bracknell (Hybrid) What if you could own and build the AI capability from the ground up in a scaling, purpose-driven tech company? Were hiring the first dedicated AI Engineer to join a fast-growing (~280 people) Healthtech organisation making a real-world impact. This is a rare opportunity to shape the AI strategy, design production-grade systems, and bring cutting-edge LLM-powered solutions into a live product environment. The Role - Youll sit at the intersection of AI, backend engineering, and cloud systems, designing and deploying intelligent features that directly impact users. * Design and implement LLM-based applications (RAG pipelines, agents, copilots) * Build scalable backend services using Python and Java * Integrate AI into existing cloud-native SaaS platforms * Own the full lifecycle: experimentation ? prototyping ? production
Bracknell (Hybrid) What if you could own and build the AI capability from the ground up in a scaling, purpose-driven tech company? Were hiring the first dedicated AI Engineer to join a fast-growing (~280 people) Healthtech organisation making a real-world impact. This is a rare opportunity to shape the AI strategy, design production-grade systems, and bring cutting-edge LLM-powered solutions into a live product environment. The Role - Youll sit at the intersection of AI, backend engineering, and cloud systems, designing and deploying intelligent features that directly impact users. * Design and implement LLM-based applications (RAG pipelines, agents, copilots) * Build scalable backend services using Python and Java * Integrate AI into existing cloud-native SaaS platforms * Own the full lifecycle: experimentation ? prototyping ? production