Date posted
Commute time
Locations
Type of Company
Job types
Salaries
Locations
Locations
Salaries
Date posted
Type of Company
Job types
Locations
142 Permanent API jobs in Sunbury-On-Thames + 20 miles
689 exact matches jobs are outside your preferred location
)
Strong application security knowledge (OWASP Top 10, API security).
Strong application security knowledge (OWASP Top 10, API security).
NEW
Strong application security knowledge (OWASP Top 10, API security).
Strong application security knowledge (OWASP Top 10, API security).
NEW
)
Data Integration Engineer
Data Integration Engineer
Anson Mccade
Basingstoke, Hampshire
GBP 700.00 per week;GBP 70,000.00 per year;GBP 85,000.00 per year
Strong understanding of API design and integration techniques (REST, Webhooks, GraphQL).
Strong understanding of API design and integration techniques (REST, Webhooks, GraphQL).
PREMIUM
)
API integration
API integration
NEW
)
Strong application security background (OWASP Top 10, API security).
Strong application security background (OWASP Top 10, API security).
NEW
)
Writing automation scripts in Postman or Ready API * Experience with writing automation scripts in Postman or Ready API
Writing automation scripts in Postman or Ready API * Experience with writing automation scripts in Postman or Ready API
NEW
)
Solid understanding of backend architecture, distributed systems and API design.
Solid understanding of backend architecture, distributed systems and API design.
NEW
.NET Framework Version 4.5 or above including strong WCF\ Web API experience
.NET Framework Version 4.5 or above including strong WCF\ Web API experience
NEW
)
.NET Framework Version 4.5 or above including strong WCF\ Web API experience
.NET Framework Version 4.5 or above including strong WCF\ Web API experience
NEW
)
Data Platform Lead
Data Platform Lead
Pertemps Thames Water
Reading, Berkshire
Up to £100,000 per annum depending on experience.
Wide range of strong platform support and technical skills. (i.e. Azure DevOps, API creation, PowerShell, Python, SQL)
Wide range of strong platform support and technical skills. (i.e. Azure DevOps, API creation, PowerShell, Python, SQL)
NEWFEATURED
)
As a Digital Product Owner youll work with a Senior Product Manager to continually improve Heathrows digital proposition, which could include product ownership of the newly introduced My Heathrow platform and commercial B2B API portal. * Deliver innovative digital experiences to a global audience to improve conversion, revenue and third-party developers using the commercial B2B API portal. * API product experience will be a further advantage.
As a Digital Product Owner youll work with a Senior Product Manager to continually improve Heathrows digital proposition, which could include product ownership of the newly introduced My Heathrow platform and commercial B2B API portal. * Deliver innovative digital experiences to a global audience to improve conversion, revenue and third-party developers using the commercial B2B API portal. * API product experience will be a further advantage.
NEW
)
We are looking for a Software Engineer with a strong foundation in API development and C# to join our data engineering team in a highly regulated industry. Were seeking candidates with over 5 years of relevant experience, a solid understanding of software system design, and a strong command of C# and modern API development patterns. Experience with authentication, authorization, and secure API communication (OAuth2, JWT, etc.). Familiarity with API gateways, microservice architecture, and asynchronous messaging patterns (e.g., queues, event buses).
We are looking for a Software Engineer with a strong foundation in API development and C# to join our data engineering team in a highly regulated industry. Were seeking candidates with over 5 years of relevant experience, a solid understanding of software system design, and a strong command of C# and modern API development patterns. Experience with authentication, authorization, and secure API communication (OAuth2, JWT, etc.). Familiarity with API gateways, microservice architecture, and asynchronous messaging patterns (e.g., queues, event buses).
NEWPREMIUM
)
Proficient in hands-on development, coding, and API design.
Proficient in hands-on development, coding, and API design.
NEW
)
Developer, .NET, C#, AI Code, Remote, COR7355
Developer, .NET, C#, AI Code, Remote, COR7355
Corriculo Ltd
Oxford, Oxfordshire
£40k - 50k per year + Remote Working
A Developer with experience in .NET, C#, and JavaScript is urgently required to join a dynamic and innovative team in a leading organisation working on a fully remote basis. This is an excellent opportunity to contribute to technological developments, streamline processes, and enhance operational efficiency. The Role - As a Developer, you will work closely with the Senior Developer to design and implement internal tools and solutions. Collaborating with various departments, you’ll support development-related queries and build integrations with third-party platforms via APIs. This role is central to improving workflows, enabling innovative practices, and contributing to the company’s technology strategy. The Company - Our client is a forward-thinking organisation committed to technological advancement and efficiency.
A Developer with experience in .NET, C#, and JavaScript is urgently required to join a dynamic and innovative team in a leading organisation working on a fully remote basis. This is an excellent opportunity to contribute to technological developments, streamline processes, and enhance operational efficiency. The Role - As a Developer, you will work closely with the Senior Developer to design and implement internal tools and solutions. Collaborating with various departments, you’ll support development-related queries and build integrations with third-party platforms via APIs. This role is central to improving workflows, enabling innovative practices, and contributing to the company’s technology strategy. The Company - Our client is a forward-thinking organisation committed to technological advancement and efficiency.
NEW
)
AWS Solutions Architect - AI Startup
AWS Solutions Architect - AI Startup
Oscar Associates (UK) Limited
London
£70000 - £75000 per annum + benefits
Join a fast-moving AI startup as our AWS Solutions Architect, where you'll design cloud systems that power cutting-edge AI products. Not just another Architect - forward thinking, we want a creative builder who can scale, secure, and optimise our AWS environment like a pro. * Design and implement AWS architectures for AI workloads * Optimise for speed, scalability, and cost - thinking ahead * Advise on best practices for pipelines, data storage, and APIs * Work side by side with engineering team - devs, data, devops, and CTO to bring big ideas to life * AWS expert with a knack for creative solutions * Loves the startup hustle: agile, fast, hands-on * Infrastrcuture as Code, working in a Devops environment * Confident communicator who can make complex simple - If you want to build the cloud backbone of tomorrow's AI products, get in touch for more info. Keywords -
Join a fast-moving AI startup as our AWS Solutions Architect, where you'll design cloud systems that power cutting-edge AI products. Not just another Architect - forward thinking, we want a creative builder who can scale, secure, and optimise our AWS environment like a pro. * Design and implement AWS architectures for AI workloads * Optimise for speed, scalability, and cost - thinking ahead * Advise on best practices for pipelines, data storage, and APIs * Work side by side with engineering team - devs, data, devops, and CTO to bring big ideas to life * AWS expert with a knack for creative solutions * Loves the startup hustle: agile, fast, hands-on * Infrastrcuture as Code, working in a Devops environment * Confident communicator who can make complex simple - If you want to build the cloud backbone of tomorrow's AI products, get in touch for more info. Keywords -
FEATURED
Job title: Lead Integration Developer - Location: London, UK - Job type: Contract (Inside IR35) About the Role As a Lead Integration Developer, you will be responsible for designing, developing, and maintaining integration solutions across various platforms, including Guidewire InsuranceSuite and other core systems. You will lead a team of developers, collaborate with stakeholders, and ensure the delivery of integration projects that meet business and technical requirements. What will you do? * Lead the design and implementation of integration solutions using APIs, web services, and messaging systems. * Collaborate with business analysts and architects to define integration requirements and strategies. * Develop and maintain integration components using technologies such as Java, REST/JSON, XML, and Enterprise Messaging Systems.
Job title: Lead Integration Developer - Location: London, UK - Job type: Contract (Inside IR35) About the Role As a Lead Integration Developer, you will be responsible for designing, developing, and maintaining integration solutions across various platforms, including Guidewire InsuranceSuite and other core systems. You will lead a team of developers, collaborate with stakeholders, and ensure the delivery of integration projects that meet business and technical requirements. What will you do? * Lead the design and implementation of integration solutions using APIs, web services, and messaging systems. * Collaborate with business analysts and architects to define integration requirements and strategies. * Develop and maintain integration components using technologies such as Java, REST/JSON, XML, and Enterprise Messaging Systems.
NEW
)
About the Role. Application and Data integrations are the beating heart at the centre of all the client's applications - allowing the sharing of data between systems & interoperability of their platforms. This Integrations Analyst Developer will be working within their solution development team, working with the team to design, test and build new integrations and maintain existing integrations on their Boomi platform using a variety of integration techniques. This is a hybrid role, currently with 2 day per week onsite at their building in East London. About You. * You will need strong technical expertise in data integration using the Boomi platform within a large scale organisation, analytical and problem solving skills, the ability to collaborate effectively with cross-functional teams, and stakeholder management.
About the Role. Application and Data integrations are the beating heart at the centre of all the client's applications - allowing the sharing of data between systems & interoperability of their platforms. This Integrations Analyst Developer will be working within their solution development team, working with the team to design, test and build new integrations and maintain existing integrations on their Boomi platform using a variety of integration techniques. This is a hybrid role, currently with 2 day per week onsite at their building in East London. About You. * You will need strong technical expertise in data integration using the Boomi platform within a large scale organisation, analytical and problem solving skills, the ability to collaborate effectively with cross-functional teams, and stakeholder management.
)
Were looking for Web Development Team Manager to lead PIBs centralised web platforms, overseeing a large multi-brand estate of more than 100 websites across Europe. Youll help shape and deliver our web platform strategy driving architecture, development, operations, and security while ensuring our WordPress, WP Engine, and Sitecore solutions are robust, scalable, and aligned to business goals. On joining us youll bring with you; * Proven experience leading web development or platform engineering teams across a multi-site, multi-brand environments * Hands-on expertise with WordPress, WP Engine, and Sitecore, including governance, deployment, optimisation, and security * A strong technical background and practical understanding of modern web stacks, architecture principles, APIs, and integrations
Were looking for Web Development Team Manager to lead PIBs centralised web platforms, overseeing a large multi-brand estate of more than 100 websites across Europe. Youll help shape and deliver our web platform strategy driving architecture, development, operations, and security while ensuring our WordPress, WP Engine, and Sitecore solutions are robust, scalable, and aligned to business goals. On joining us youll bring with you; * Proven experience leading web development or platform engineering teams across a multi-site, multi-brand environments * Hands-on expertise with WordPress, WP Engine, and Sitecore, including governance, deployment, optimisation, and security * A strong technical background and practical understanding of modern web stacks, architecture principles, APIs, and integrations
NEW
)
Position: AI Engineer / AI Agent / Backend AI Engineer - Location: Remote - Work Type: Contract - We're looking for an AI Engineer to design and deliver scalable AI/ML systems and agentic applications. You'll work on LLMs, RAG pipelines, model deployment, and cloud-native solutions that drive real-world impact. * Strong coding skills in Java / TypeScript /Python * Experience with LLMs, NLP, and ML frameworks (Hugging Face, PyTorch, TensorFlow, LangChain) * Cloud & DevOps expertise (AWS/Azure, Docker, Kubernetes, CI/CD pipelines) * Knowledge of microservices, APIs, distributed systems - Why join us? * Work on cutting-edge AI innovation * Collaborative, cross-functional environment * Competitive salary + growth opportunities - We encourage you to apply or send me your updated resume to nandiraju . b @ randstad . co. uk
Position: AI Engineer / AI Agent / Backend AI Engineer - Location: Remote - Work Type: Contract - We're looking for an AI Engineer to design and deliver scalable AI/ML systems and agentic applications. You'll work on LLMs, RAG pipelines, model deployment, and cloud-native solutions that drive real-world impact. * Strong coding skills in Java / TypeScript /Python * Experience with LLMs, NLP, and ML frameworks (Hugging Face, PyTorch, TensorFlow, LangChain) * Cloud & DevOps expertise (AWS/Azure, Docker, Kubernetes, CI/CD pipelines) * Knowledge of microservices, APIs, distributed systems - Why join us? * Work on cutting-edge AI innovation * Collaborative, cross-functional environment * Competitive salary + growth opportunities - We encourage you to apply or send me your updated resume to nandiraju . b @ randstad . co. uk
NEWFEATURED
)
Up to £640 per day (Inside IR35) London / Remote - 6 months - My client is an instantly recognisable consultancy who urgently requires a Lead Full Stack Developer to join a business-critical programme. * Proven experience working as a Lead Java Developer within the public sector * Active Security Clearance (SC) * Java (8/11/17+): Expert-level programming and deep understanding of the language and its core libraries * Spring Boot: Expert in building RESTful APIs and microservices * AWS: Strong experience with core AWS services (EC2, S3, Lambda, IAM, etc.) * Kafka / Messaging Systems: Expertise in building event-driven architectures * SQL: Strong experience with relational databases and query optimization * REST / JSON APIs: Designing, developing, and consuming scalable APIs * Docker: Proficiency in containerizing applications for local and cloud environments
Up to £640 per day (Inside IR35) London / Remote - 6 months - My client is an instantly recognisable consultancy who urgently requires a Lead Full Stack Developer to join a business-critical programme. * Proven experience working as a Lead Java Developer within the public sector * Active Security Clearance (SC) * Java (8/11/17+): Expert-level programming and deep understanding of the language and its core libraries * Spring Boot: Expert in building RESTful APIs and microservices * AWS: Strong experience with core AWS services (EC2, S3, Lambda, IAM, etc.) * Kafka / Messaging Systems: Expertise in building event-driven architectures * SQL: Strong experience with relational databases and query optimization * REST / JSON APIs: Designing, developing, and consuming scalable APIs * Docker: Proficiency in containerizing applications for local and cloud environments
NEW
Position: Backend Engineer - Location: Remote (UK) Work Type: Contract - Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
Position: Backend Engineer - Location: Remote (UK) Work Type: Contract - Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
NEWFEATURED
)
Contract Java Developer (Inside IR35) | SC Cleared - We are seeking a highly skilled Contract Java Developer with active SC Clearance to join a critical project on a long-term contract. This is a crucial role for a candidate who can hit the ground running and contribute to a significant public sector programme. Key Information * IR35 Status: Inside IR35 * Duration: 6-12 month initial contract * Location: Remote, with required travel to London once a month. * Security Clearance: You must hold an active SC Clearance. The Role - You will be a key member of a development team, responsible for designing and implementing high-performance back-end services. This role requires deep technical expertise and a proactive approach to problem-solving. You will be working with a modern tech stack to deliver a new solution for a high-profile client. Required Skills & Experience
Contract Java Developer (Inside IR35) | SC Cleared - We are seeking a highly skilled Contract Java Developer with active SC Clearance to join a critical project on a long-term contract. This is a crucial role for a candidate who can hit the ground running and contribute to a significant public sector programme. Key Information * IR35 Status: Inside IR35 * Duration: 6-12 month initial contract * Location: Remote, with required travel to London once a month. * Security Clearance: You must hold an active SC Clearance. The Role - You will be a key member of a development team, responsible for designing and implementing high-performance back-end services. This role requires deep technical expertise and a proactive approach to problem-solving. You will be working with a modern tech stack to deliver a new solution for a high-profile client. Required Skills & Experience
FEATURED
Overview - We are seeking an experienced PHP developer to join our development team. The role involves building and maintaining web applications that integrate with our core quote and sales engines. The successful candidate will have strong PHP and MySQL expertise, with the ability to write efficient, well-structured code without over-reliance on heavy frameworks. Key Responsibilities - Develop and maintain PHP applications that integrate with our back-end systems. Design and optimise MySQL databases, including complex queries and schema design for performance and scalability. Implement APIs for third-party website integration. Work across both back-end and front-end as needed (HTML, CSS, JavaScript). Ensure code quality, efficiency, and security best practices. Collaborate with team members to deliver reliable and maintainable solutions. Essential Skills & Experience
Overview - We are seeking an experienced PHP developer to join our development team. The role involves building and maintaining web applications that integrate with our core quote and sales engines. The successful candidate will have strong PHP and MySQL expertise, with the ability to write efficient, well-structured code without over-reliance on heavy frameworks. Key Responsibilities - Develop and maintain PHP applications that integrate with our back-end systems. Design and optimise MySQL databases, including complex queries and schema design for performance and scalability. Implement APIs for third-party website integration. Work across both back-end and front-end as needed (HTML, CSS, JavaScript). Ensure code quality, efficiency, and security best practices. Collaborate with team members to deliver reliable and maintainable solutions. Essential Skills & Experience
NEW
)
Location: Hybrid Working London Office/Remote - Reporting to: Engineering Manager - We are seeking innovative Linux Systems Engineer to help shape the next generation of secure endpoint solutions. This role is open to both experienced engineers ready to tackle complex challenges and mid-level engineers eager to learn, grow, and innovate. You will work at the intersection of Linux internals, networking, virtualisation, and security, building solutions for high-profile clients. The work you do will contribute to endpoint technologies that will set the direction for the next decadejust as todays established solutions set the standard a decade ago. * Linux OS Development: Design, develop, and maintain Linux-based operating systems with a strong emphasis on security, performance, and reliability. * System & Security Engineering: Work with Linux distributions, kernel-level
Location: Hybrid Working London Office/Remote - Reporting to: Engineering Manager - We are seeking innovative Linux Systems Engineer to help shape the next generation of secure endpoint solutions. This role is open to both experienced engineers ready to tackle complex challenges and mid-level engineers eager to learn, grow, and innovate. You will work at the intersection of Linux internals, networking, virtualisation, and security, building solutions for high-profile clients. The work you do will contribute to endpoint technologies that will set the direction for the next decadejust as todays established solutions set the standard a decade ago. * Linux OS Development: Design, develop, and maintain Linux-based operating systems with a strong emphasis on security, performance, and reliability. * System & Security Engineering: Work with Linux distributions, kernel-level
NEW
)
About the Business - Quilter plc is a leading wealth management business, helping to enable brighter financial futures for every generation. Quilter oversees £126.3 billion in customer investments (as of August 2025). It has an adviser and customer offering spanning financial advice, investment platforms, multi-asset investment solutions, and discretionary fund management. The business is comprised of two segments: Affluent and High Net Worth. Affluent encompasses the financial planning business, Quilter Financial Planning, the Quilter Investment Platform and Quilter Investors, the multi-asset investment solutions business. High Net Worth includes the discretionary fund management business, Quilter Cheviot, together with Quilter Cheviot Financial Planning offering a highly personalised service to private clients, charities, trustees, and professional partners.
About the Business - Quilter plc is a leading wealth management business, helping to enable brighter financial futures for every generation. Quilter oversees £126.3 billion in customer investments (as of August 2025). It has an adviser and customer offering spanning financial advice, investment platforms, multi-asset investment solutions, and discretionary fund management. The business is comprised of two segments: Affluent and High Net Worth. Affluent encompasses the financial planning business, Quilter Financial Planning, the Quilter Investment Platform and Quilter Investors, the multi-asset investment solutions business. High Net Worth includes the discretionary fund management business, Quilter Cheviot, together with Quilter Cheviot Financial Planning offering a highly personalised service to private clients, charities, trustees, and professional partners.
NEW