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2 Contract API jobs in Portsmouth + 20 miles
Senior Developer – Enterprise Reporting & Applications
Senior Developer – Enterprise Reporting & Applications
Subsea Craft Limited
Portsmouth, Hampshire
£55,000 - £60,000 a year
Express.js for API and service development
Express.js for API and service development
AI is changing how software is built - join a team leveraging its capabilities. Full Stack Developer - AI-first approach Location - Onsite in Southampton, Hampshire. Tech - JavaScript, TypeScript, AI (Claude. This is your opportunity to join a growing digital technology specialist as a Full Stack Developer using AI daily to improve speed, quality and customer outcomes. This role is ideal for someone who is comfortable moving between frontend, backend, data, and web, and who is already using AI tools as part of their day-to-day development workflow. You'll be working in a pragmatic, collaborative environment where developers take ownership of features from concept through to deployment, and where modern tooling and AI-assisted development are actively encouraged. What You'll Be Doing Building and maintaining features end-to-end, from UI through to APIs, databases, and ...
AI is changing how software is built - join a team leveraging its capabilities. Full Stack Developer - AI-first approach Location - Onsite in Southampton, Hampshire. Tech - JavaScript, TypeScript, AI (Claude. This is your opportunity to join a growing digital technology specialist as a Full Stack Developer using AI daily to improve speed, quality and customer outcomes. This role is ideal for someone who is comfortable moving between frontend, backend, data, and web, and who is already using AI tools as part of their day-to-day development workflow. You'll be working in a pragmatic, collaborative environment where developers take ownership of features from concept through to deployment, and where modern tooling and AI-assisted development are actively encouraged. What You'll Be Doing Building and maintaining features end-to-end, from UI through to APIs, databases, and ...
197 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
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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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API Creation and Integration
API Creation and Integration
FEATURED
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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
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Software Programme Manager
Software Programme Manager
System Recruitment
Lymington (SO41), SO41 9AZ
£350 - £550 per day + open to negotiation
Key Skills: Software, Technical Programme Manager, Software Developer, Software Engineer, C, Linux, API, VM/Docker, OnPrem/Cloud, * API definition, consistency, suitability and validation
Key Skills: Software, Technical Programme Manager, Software Developer, Software Engineer, C, Linux, API, VM/Docker, OnPrem/Cloud, * API definition, consistency, suitability and validation
FEATURED
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Oracle Technical Change Consultant - Financial Systems
Oracle Technical Change Consultant - Financial Systems
Cadence Resourcing Limited
Reading (RG1)
£550 - £600 per day + Outside IR35
The contract requires a solid understanding of database schema and API structures for core financial modules: General Ledger (GL), Accounts Payable (AP), Accounts Receivable (AR), Fixed Assets (FA), and Cash Management (CE).
The contract requires a solid understanding of database schema and API structures for core financial modules: General Ledger (GL), Accounts Payable (AP), Accounts Receivable (AR), Fixed Assets (FA), and Cash Management (CE).
FEATURED
Senior Software Developer C and Linux
Senior Software Developer C and Linux
System Recruitment
Waterford, Lymington (SO41), SO41 9AZ
£250 - £350 per day
Key Skills: Software Developer, Software Engineer, C, Linux, Autotools, LDAP, Active Directory, Terraform, OpenTofu, API
Key Skills: Software Developer, Software Engineer, C, Linux, Autotools, LDAP, Active Directory, Terraform, OpenTofu, API
FEATURED
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
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MERITUS are recruiting for an SC Cleared Technical Architect / Solution Architect to join our client delivering secure, large-scale technology programmes within the Defence and Central Government sector. As a Technical Architect, you will lead the design and assurance of complex, secure systems across major government programmes. You will ensure architectural integrity across the full delivery lifecycle, working closely with engineering, delivery, and security teams to design scalable, compliant, cloud-based solutions. * Lead technical design of large-scale, complex systems * Define and govern solution architecture and technical designs * Ensure alignment with security, performance, scalability, and compliance standards * Work closely with engineering, delivery, and business stakeholders * Provide technical governance, assurance, and risk evaluation
MERITUS are recruiting for an SC Cleared Technical Architect / Solution Architect to join our client delivering secure, large-scale technology programmes within the Defence and Central Government sector. As a Technical Architect, you will lead the design and assurance of complex, secure systems across major government programmes. You will ensure architectural integrity across the full delivery lifecycle, working closely with engineering, delivery, and security teams to design scalable, compliant, cloud-based solutions. * Lead technical design of large-scale, complex systems * Define and govern solution architecture and technical designs * Ensure alignment with security, performance, scalability, and compliance standards * Work closely with engineering, delivery, and business stakeholders * Provide technical governance, assurance, and risk evaluation
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Server Infrastructure Engineer
Server Infrastructure Engineer
CBSbutler Holdings Limited
Blandford Forum (DT11)
£550 - £600 per day + Outside IR35
+9 months + +On site in Blandford +SC cleared role +Outside IR35 +£550 - £600 a day - We are seeking a skilled and motivated Server Infrastructure Engineer to support the management, maintenance, and assurance of secure testbed environments that enable critical digital development, integration, and innovation activities within the Defence sector. Working as part of a specialist engineering team, you will be responsible for maintaining both on-premise and cloud-hosted infrastructure environments, ensuring secure, reliable, and continuous support for development activities, testing, exercises, and emerging AI capabilities. This is an exciting opportunity for an infrastructure professional with Defence CIS experience who enjoys working across server technologies, cloud platforms, virtualisation, networking, and cyber security. Key Responsibilities
+9 months + +On site in Blandford +SC cleared role +Outside IR35 +£550 - £600 a day - We are seeking a skilled and motivated Server Infrastructure Engineer to support the management, maintenance, and assurance of secure testbed environments that enable critical digital development, integration, and innovation activities within the Defence sector. Working as part of a specialist engineering team, you will be responsible for maintaining both on-premise and cloud-hosted infrastructure environments, ensuring secure, reliable, and continuous support for development activities, testing, exercises, and emerging AI capabilities. This is an exciting opportunity for an infrastructure professional with Defence CIS experience who enjoys working across server technologies, cloud platforms, virtualisation, networking, and cyber security. Key Responsibilities
Location: Farnborough (3 days per week onsite) Contract Length: Initial 3-month contract - IR35 Status: Outside IR35 - Security Clearance: All candidates must be eligible for security clearance prior to appointment. We are seeking an experienced Senior Software Engineer with strong geospatial data experience to join a high-performing engineering team delivering advanced data-driven and navigation-focused solutions within a complex operational environment. This role is suited to a hands-on software engineer with experience designing and developing scalable applications and services that work with geospatial datasets, spatial databases, and mapping technologies. Experience within the maritime domain and optimisation-based problem solving would be highly beneficial. Key Responsibilities * Design, develop, and maintain scalable software applications and services
Location: Farnborough (3 days per week onsite) Contract Length: Initial 3-month contract - IR35 Status: Outside IR35 - Security Clearance: All candidates must be eligible for security clearance prior to appointment. We are seeking an experienced Senior Software Engineer with strong geospatial data experience to join a high-performing engineering team delivering advanced data-driven and navigation-focused solutions within a complex operational environment. This role is suited to a hands-on software engineer with experience designing and developing scalable applications and services that work with geospatial datasets, spatial databases, and mapping technologies. Experience within the maritime domain and optimisation-based problem solving would be highly beneficial. Key Responsibilities * Design, develop, and maintain scalable software applications and services
FEATURED
Core Tech: Node.js, API Integration, Microservices, Microsoft Azure Cloud - Drive a culture of technical pride, ensuring robust API design, secure cloud deployment practices, and insightful code reviews. You will be equally comfortable discussing API design with frontend and mobile engineers as you are discussing business value and roadmap priorities with Senior Executives (C-suite/CxO level) to help them achieve their business ambitions.
Core Tech: Node.js, API Integration, Microservices, Microsoft Azure Cloud - Drive a culture of technical pride, ensuring robust API design, secure cloud deployment practices, and insightful code reviews. You will be equally comfortable discussing API design with frontend and mobile engineers as you are discussing business value and roadmap priorities with Senior Executives (C-suite/CxO level) to help them achieve their business ambitions.
We are proud of our market leading integrations estate, and our Open API capabilities, and continue to build on these with our * Open API for customers, ecosystem partners and Advice firms * Propose and lead on business and partnership models (license, tiered API, embedded UX, or per-event pricing)
We are proud of our market leading integrations estate, and our Open API capabilities, and continue to build on these with our * Open API for customers, ecosystem partners and Advice firms * Propose and lead on business and partnership models (license, tiered API, embedded UX, or per-event pricing)
Proficient in Go and/or Python and experienced with modern observability tooling; bonus points for containers/IoT OS, ACL-as-code patterns, and carrier/router API integrations.
Proficient in Go and/or Python and experienced with modern observability tooling; bonus points for containers/IoT OS, ACL-as-code patterns, and carrier/router API integrations.
InfoSum is the worlds leading data collaboration platform, providing solutions to the worlds largest enterprises to allow collaboration across data sources and deliver richer customer experiences that prioritize consumer privacy. Our vision is to unlock datas limitless potential, by enabling the worlds data to be connected but never shared. As a people-first organization, we can offer you the personal and professional flexibility needed to get the job done, grow with us, and help challenge the status quo. If you want to work with a business that encourages collaboration, and champions the idea that the sum is greater than its parts, then we want to hear from you. The Engineering department at InfoSum is dedicated to delivering high-quality, innovative software solutions that meet the needs of our customers and drive the success of our organization.
InfoSum is the worlds leading data collaboration platform, providing solutions to the worlds largest enterprises to allow collaboration across data sources and deliver richer customer experiences that prioritize consumer privacy. Our vision is to unlock datas limitless potential, by enabling the worlds data to be connected but never shared. As a people-first organization, we can offer you the personal and professional flexibility needed to get the job done, grow with us, and help challenge the status quo. If you want to work with a business that encourages collaboration, and champions the idea that the sum is greater than its parts, then we want to hear from you. The Engineering department at InfoSum is dedicated to delivering high-quality, innovative software solutions that meet the needs of our customers and drive the success of our organization.
InfoSum is the worlds leading data collaboration platform, providing solutions to the worlds largest enterprises to allow collaboration across data sources and deliver richer customer experiences that prioritize consumer privacy. Our vision is to unlock datas limitless potential, by enabling the worlds data to be connected but never shared. As a people-first organization, we can offer you the personal and professional flexibility needed to get the job done, grow with us, and help challenge the status quo. If you want to work with a business that encourages collaboration, and champions the idea that the sum is greater than its parts, then we want to hear from you. The Engineering department at InfoSum is dedicated to delivering high-quality, innovative software solutions that meet the needs of our customers and drive the success of our organization.
InfoSum is the worlds leading data collaboration platform, providing solutions to the worlds largest enterprises to allow collaboration across data sources and deliver richer customer experiences that prioritize consumer privacy. Our vision is to unlock datas limitless potential, by enabling the worlds data to be connected but never shared. As a people-first organization, we can offer you the personal and professional flexibility needed to get the job done, grow with us, and help challenge the status quo. If you want to work with a business that encourages collaboration, and champions the idea that the sum is greater than its parts, then we want to hear from you. The Engineering department at InfoSum is dedicated to delivering high-quality, innovative software solutions that meet the needs of our customers and drive the success of our organization.
Roke, Roke Manor, Romsey, Hampshire, United Kingdom Job Description Posted Tuesday, 12 May 2026, 19:00 - Great ideas come from different minds. Thats why we bring together engineers, scientists, analysts, and creatives from every background and give them the trust, tools, and freedom to make a difference. What connects us is the mission: solving meaningful problems and building capability that protects what matters most. And as the challenges evolve, so do we working on the technologies that will shape tomorrow, not just today. About Roke - The Opportunity - Roke are now looking for a passionate DevSecOps Engineer with Software Development experience to become an aggregated part of our Defence Information Advantage team. Innovation is at the core of what we do. You will be encouraged to contribute to Rokes innovation process by devising ideas for products/ techniques, developing ...
Roke, Roke Manor, Romsey, Hampshire, United Kingdom Job Description Posted Tuesday, 12 May 2026, 19:00 - Great ideas come from different minds. Thats why we bring together engineers, scientists, analysts, and creatives from every background and give them the trust, tools, and freedom to make a difference. What connects us is the mission: solving meaningful problems and building capability that protects what matters most. And as the challenges evolve, so do we working on the technologies that will shape tomorrow, not just today. About Roke - The Opportunity - Roke are now looking for a passionate DevSecOps Engineer with Software Development experience to become an aggregated part of our Defence Information Advantage team. Innovation is at the core of what we do. You will be encouraged to contribute to Rokes innovation process by devising ideas for products/ techniques, developing ...
This is not a generic SAP support role. If you have spent time in enterprise SAP environments and you want to go deeper, debugging real production issues, working alongside product engineers, and building expertise in a product used by some of the world's most complex organisations, this is worth reading. As an L2 Support Analyst at Basis Technologies, you sit at the technical heart of the customer experience. You take the hard cases, the ones that require real root cause analysis, ABAP debugging, and transport management expertise, and you solve them. You work directly with customers' technical teams, and when a defect needs escalating, you hand it to L3 Engineering with your analysis already done. Product depth, not project breadth. If you have come from a consultancy or SI background, you will know what it feels like to move on before you fully understand what you built.
This is not a generic SAP support role. If you have spent time in enterprise SAP environments and you want to go deeper, debugging real production issues, working alongside product engineers, and building expertise in a product used by some of the world's most complex organisations, this is worth reading. As an L2 Support Analyst at Basis Technologies, you sit at the technical heart of the customer experience. You take the hard cases, the ones that require real root cause analysis, ABAP debugging, and transport management expertise, and you solve them. You work directly with customers' technical teams, and when a defect needs escalating, you hand it to L3 Engineering with your analysis already done. Product depth, not project breadth. If you have come from a consultancy or SI background, you will know what it feels like to move on before you fully understand what you built.
Monitoring and optimising API development and managing calls and consumption cost
Monitoring and optimising API development and managing calls and consumption cost
Monitoring and optimising API development and managing calls and consumption cost
Monitoring and optimising API development and managing calls and consumption cost
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The ideal candidate will be an experienced Python developer with a strong understanding of modern backend engineering principles, cloud-native development, and API design.
The ideal candidate will be an experienced Python developer with a strong understanding of modern backend engineering principles, cloud-native development, and API design.
The ideal candidate will be an experienced Python developer with a strong understanding of modern backend engineering principles, cloud-native development, and API design.
The ideal candidate will be an experienced Python developer with a strong understanding of modern backend engineering principles, cloud-native development, and API design.
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IoT Hub, Device Provisioning Service (DPS) Azure Functions, Event Grid, MQTT Azure SQL, Storage, App Services API Management Strong understanding of modularization, domain boundaries, and API patterns Proven ability to convert requirements into structured architecture outputs Experience in large-scale enterprise environments Strong technical review and architectural governance capability Excellent communication skills to align engineering, product, field, security, and management Fluent English language skills, written and spoken (project language) Architecture Specifications Target architectures for incoming requirements Modularization and domain boundary recommendations API and integration design proposals 2.
IoT Hub, Device Provisioning Service (DPS) Azure Functions, Event Grid, MQTT Azure SQL, Storage, App Services API Management Strong understanding of modularization, domain boundaries, and API patterns Proven ability to convert requirements into structured architecture outputs Experience in large-scale enterprise environments Strong technical review and architectural governance capability Excellent communication skills to align engineering, product, field, security, and management Fluent English language skills, written and spoken (project language) Architecture Specifications Target architectures for incoming requirements Modularization and domain boundary recommendations API and integration design proposals 2.