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17 Permanent API jobs in Henley-On-Thames + 20 miles
231 exact matches jobs are outside your preferred location
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Implement and champion advanced integration patterns, including microservices, API-led connectivity, event-driven architectures, and pub/sub models, to deliver resilient, future-proof solutions. * Proficiency in Azure Integration Services: Logic Apps, API Management, Service Bus, Event Grid. * Solid understanding of integration patterns: pub/sub, event-driven, API-led connectivity, request/response, batch. * Awareness of security best practices: OAuth2, JWT, TLS, API security.
Implement and champion advanced integration patterns, including microservices, API-led connectivity, event-driven architectures, and pub/sub models, to deliver resilient, future-proof solutions. * Proficiency in Azure Integration Services: Logic Apps, API Management, Service Bus, Event Grid. * Solid understanding of integration patterns: pub/sub, event-driven, API-led connectivity, request/response, batch. * Awareness of security best practices: OAuth2, JWT, TLS, API security.
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Experience creating RESTful APIs and ensuring API extensibility?
Experience creating RESTful APIs and ensuring API extensibility?
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Systems Engineer - Enterprise Technology
Systems Engineer - Enterprise Technology
Randstad Digital
EC1, City of London
£250000 - £350000 per annum
Proficiency with the administration, integration, and API capabilities of SaaS platforms such as Okta, Google Workspace, Atlassian products, and Slack. * Familiarity with authentication and provisioning methods like SAML, OIDC, SCIM, and non-standard API-based workflows.
Proficiency with the administration, integration, and API capabilities of SaaS platforms such as Okta, Google Workspace, Atlassian products, and Slack. * Familiarity with authentication and provisioning methods like SAML, OIDC, SCIM, and non-standard API-based workflows.
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Large Language API's (from 2021) * Assisting with the maintenance and iteration of a FastAPI-based web API hosted on AWS.
Large Language API's (from 2021) * Assisting with the maintenance and iteration of a FastAPI-based web API hosted on AWS.
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Experience with AWS, Kubernetes, Service Mesh, and API Security (including authentication and authorization).
Experience with AWS, Kubernetes, Service Mesh, and API Security (including authentication and authorization).
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Experience with AWS, Kubernetes, Service Mesh, API gateways, and API Security (authentication and authorization).
Experience with AWS, Kubernetes, Service Mesh, API gateways, and API Security (authentication and authorization).
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Global Claims, IT Solutions Leader
Global Claims, IT Solutions Leader
MARSH CORPORATE SERVICES LIMITED
The City, EC3R 5BU
Discretionary Bonus, Pension Scheme & Private Healthcare
Being a cross-functional collaborator interfacing with MMC Enterprise Technology partners, Marsh-Operations, and Transformation Office will come naturally to you building a new set of reusable IT Microservices connected via a well-defined API structure.
Being a cross-functional collaborator interfacing with MMC Enterprise Technology partners, Marsh-Operations, and Transformation Office will come naturally to you building a new set of reusable IT Microservices connected via a well-defined API structure.
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Experience with API development and integration
Experience with API development and integration
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Senior Technical Business Analyst
Senior Technical Business Analyst
REC SOLUTIONS LIMITED
The City, EC4
Competitive base salary plus bonus and benefits
Technical documentation Produce and maintain detailed technical and functional documentation, including API specifications, configuration workflows, and integration guides. * Proven ability to produce and maintain high-quality technical documentation and API specifications suitable for both engineering and client consumption.
Technical documentation Produce and maintain detailed technical and functional documentation, including API specifications, configuration workflows, and integration guides. * Proven ability to produce and maintain high-quality technical documentation and API specifications suitable for both engineering and client consumption.
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Familiarity with API Security, Container Security, AWS Cloud Security
Familiarity with API Security, Container Security, AWS Cloud Security
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iPaaS Platform & Integration Engineer
iPaaS Platform & Integration Engineer
Informed Recruitment Limited
MK3, Milton Keynes, MK3 6EB
£50000 - £65000 per annum + Excellent Benefits
API & Web Services - REST/RESTFul, SOAP, XML, JSON
API & Web Services - REST/RESTFul, SOAP, XML, JSON
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We employ a micro front-end (MFE) architecture on the web, and agentic workflows with API-first services behind it, to integrate risk insights seamlessly across workflows and surfaces. * Design, develop, and operate secure, scalable APIs/microservices in Python (FastAPI) or Java (Spring Boot), following API-first principles * Experience building and consuming APIs; strong grasp of REST/gRPC and API
We employ a micro front-end (MFE) architecture on the web, and agentic workflows with API-first services behind it, to integrate risk insights seamlessly across workflows and surfaces. * Design, develop, and operate secure, scalable APIs/microservices in Python (FastAPI) or Java (Spring Boot), following API-first principles * Experience building and consuming APIs; strong grasp of REST/gRPC and API
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The Digital Engineering team is responsible for providing unified digital experience to our clients that interact with Transaction Banking products via different interfaces such as Banking as a Service API, client portal, Files and SWIFT network. * Experience with Microservice architectures and REST API * Open API Familiarity with experience in building external API using REST and Webhooks
The Digital Engineering team is responsible for providing unified digital experience to our clients that interact with Transaction Banking products via different interfaces such as Banking as a Service API, client portal, Files and SWIFT network. * Experience with Microservice architectures and REST API * Open API Familiarity with experience in building external API using REST and Webhooks
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Proficient in hands-on development, coding, and API design.
Proficient in hands-on development, coding, and API design.
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Manages all technical/API integrations as required to ensure activity is personalised, timely and relevant; and tracked effectively.
Manages all technical/API integrations as required to ensure activity is personalised, timely and relevant; and tracked effectively.
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Location: Esher (two days WFH) Must have Right to Work in the UK (cannot provide sponsorship) This person will contribute directly to the organisations digital transformation roadmap by embedding automation and AI into our operations and business. This will involve building AI-powered conversational agents and automating business processes using Microsoft Power Platform tools like Power Apps, Power Automate, and Power Virtual Agents (part of Microsoft Copilot Studio). * Chatbot Development: Design, build, and implement AI chatbots using Power Virtual Agents/Copilot Studio to streamline interactions and automate tasks. * Process Automation: Create automated workflows and processes using Power Automate to improve efficiency and reduce manual tasks, often incorporating AI capabilities. * Application Development: Develop intelligent business applications with Power Apps,
Location: Esher (two days WFH) Must have Right to Work in the UK (cannot provide sponsorship) This person will contribute directly to the organisations digital transformation roadmap by embedding automation and AI into our operations and business. This will involve building AI-powered conversational agents and automating business processes using Microsoft Power Platform tools like Power Apps, Power Automate, and Power Virtual Agents (part of Microsoft Copilot Studio). * Chatbot Development: Design, build, and implement AI chatbots using Power Virtual Agents/Copilot Studio to streamline interactions and automate tasks. * Process Automation: Create automated workflows and processes using Power Automate to improve efficiency and reduce manual tasks, often incorporating AI capabilities. * Application Development: Develop intelligent business applications with Power Apps,
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we are hiring forTechnical Data Architect - location: Central London - Type : Permanent - Hybrid role (2-3 days from client location) We are seeking a highly skilled TechnicalData Architect- with expertise in Databricks, PySpark, and modern data engineering practices. The ideal candidate will lead the design, development, and optimization of scalable data pipelines, while ensuring data accuracy, consistency, and performance across the enterprise Lakehouse platform. This role requires strong leadership, technical depth, and the ability to collaborate with cross-functional teams. Key Responsibilities - Lead the design, development, and maintenance of scalable, high-performance data pipelines on Databricks. Architect and implement data ingestion, transformation, and integration workflows using PySpark, SQL, and Delta Lake.
we are hiring forTechnical Data Architect - location: Central London - Type : Permanent - Hybrid role (2-3 days from client location) We are seeking a highly skilled TechnicalData Architect- with expertise in Databricks, PySpark, and modern data engineering practices. The ideal candidate will lead the design, development, and optimization of scalable data pipelines, while ensuring data accuracy, consistency, and performance across the enterprise Lakehouse platform. This role requires strong leadership, technical depth, and the ability to collaborate with cross-functional teams. Key Responsibilities - Lead the design, development, and maintenance of scalable, high-performance data pipelines on Databricks. Architect and implement data ingestion, transformation, and integration workflows using PySpark, SQL, and Delta Lake.
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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
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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.
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Backend Engineer - Scale Systems with Real Impact ?? Tired of tinkering at the edges? Want to actually shape the backbone of a platform that's transforming how the world's biggest enterprises run their tech? This is one of those rare roles where you get in early, build the foundations, and watch your work scale across global businesses. We're working with a high-growth London startup on a mission to reinvent enterprise software. Their AI-driven platform is already saving household-name customers millions in IT costs, shaving months off ERP project timelines, and making sense of the mess that legacy systems leave behind. SAP is just the beginning - they're building a whole new category of Enterprise System Intelligence. The Role * Build core systems capable of handling tens of millions of lines of code and large-scale LLM workloads.
Backend Engineer - Scale Systems with Real Impact ?? Tired of tinkering at the edges? Want to actually shape the backbone of a platform that's transforming how the world's biggest enterprises run their tech? This is one of those rare roles where you get in early, build the foundations, and watch your work scale across global businesses. We're working with a high-growth London startup on a mission to reinvent enterprise software. Their AI-driven platform is already saving household-name customers millions in IT costs, shaving months off ERP project timelines, and making sense of the mess that legacy systems leave behind. SAP is just the beginning - they're building a whole new category of Enterprise System Intelligence. The Role * Build core systems capable of handling tens of millions of lines of code and large-scale LLM workloads.
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Software Engineer C#
Software Engineer C#
Leidos Innovations UK Limited
Whiteley, PO15 7AA
From £45,000 to £65,000 per annum Excellent benefits
Software Engineer - Join our UK Team who are committed to a Mission! At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers success. We empower our teams in the UK to address some of the most complex problems in defence, government, safety and security, and transportation. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business. Leidos heritage companies pioneered the development of air traffic control systems in the United States more than 50 years ago. Today our systems handle 75 per cent of the air traffic in the U.S. and approximately 60 per cent of the worlds air traffic. When it comes to air traffic safety and efficiency, our proven track record and industry-leading in
Software Engineer - Join our UK Team who are committed to a Mission! At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers success. We empower our teams in the UK to address some of the most complex problems in defence, government, safety and security, and transportation. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business. Leidos heritage companies pioneered the development of air traffic control systems in the United States more than 50 years ago. Today our systems handle 75 per cent of the air traffic in the U.S. and approximately 60 per cent of the worlds air traffic. When it comes to air traffic safety and efficiency, our proven track record and industry-leading in
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Senior Software Engineer Full Stack JavaScript
Senior Software Engineer Full Stack JavaScript
Client Server
W6, West London
£85000 - £100000 per annum
Senior Software Engineer / Developer (Full Stack JavaScript) London to £100k - Opportunity to progress your career in a senior, hands-on Software Engineer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets, the company has been established 10 years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Senior Software Engineer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and future proof the business. You'll work across the full tech stack using JavaScript and Vue.js on the front end, there's a range of other tech in the stack (TypeScrip
Senior Software Engineer / Developer (Full Stack JavaScript) London to £100k - Opportunity to progress your career in a senior, hands-on Software Engineer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets, the company has been established 10 years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Senior Software Engineer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and future proof the business. You'll work across the full tech stack using JavaScript and Vue.js on the front end, there's a range of other tech in the stack (TypeScrip
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Our Purpose - Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary - Overview - We are looking for a software engineer to join an award winning team with a proven track record of combining data science techniques with an intimate knowledge of payments data to aid Financial Institutions in their fight against money laundering and fraud. Headquartered in The City of London, we craft bespoke services that help our clien
Our Purpose - Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary - Overview - We are looking for a software engineer to join an award winning team with a proven track record of combining data science techniques with an intimate knowledge of payments data to aid Financial Institutions in their fight against money laundering and fraud. Headquartered in The City of London, we craft bespoke services that help our clien
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Job Description - Job Type: Perm - Location: London. Flexible working: All our roles are open to part-time, job-share and other types of flexibility. We will discuss what is important to you and balancing this with business requirements during the recruitment process. You can read more about Phoenix Flex here. Salary and benefits: Up tp £100,000 plus bonus 16% - 32%, private medical cover, 38 days annual leave, excellent pension, 12x salary life assurance, career breaks, income protection, 3x volunteering days and much more - Closing Date: 29th October - Were Phoenix Group, were a long-term savings and retirement business. We offer a range of products across our market-leading brands, Standard Life, SunLife, Phoenix Life and ReAssure. Around 1 in 5 people in the UK has a pension with us. Were a FTSE 100 organisation that is tackling key issues such as transitioning ou
Job Description - Job Type: Perm - Location: London. Flexible working: All our roles are open to part-time, job-share and other types of flexibility. We will discuss what is important to you and balancing this with business requirements during the recruitment process. You can read more about Phoenix Flex here. Salary and benefits: Up tp £100,000 plus bonus 16% - 32%, private medical cover, 38 days annual leave, excellent pension, 12x salary life assurance, career breaks, income protection, 3x volunteering days and much more - Closing Date: 29th October - Were Phoenix Group, were a long-term savings and retirement business. We offer a range of products across our market-leading brands, Standard Life, SunLife, Phoenix Life and ReAssure. Around 1 in 5 people in the UK has a pension with us. Were a FTSE 100 organisation that is tackling key issues such as transitioning ou
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Are you passionate about using artificial intelligence to make a real-world impact? Our client is seeking an ambitious AI Software Engineer to help design and deliver innovative AI solutions for some of the worlds leading organisations. In this exciting role, youll play a key part in the technical delivery of AI applications for clients and help shape the future of their charity-focused product, Chat2Impact. Youll work closely with clients and their internal teams to bring ideas to life from concept through to deployment helping businesses and charities use AI for good. This is a 4 day a week role (Mon-Thurs), with a competitive salary up to £70k (Pro Rata). * Take ownership of the technical implementation of AI solutions across diverse client projects. * Collaborate with the Innovation Lead and clients to shape, design and explain potential solutions.
Are you passionate about using artificial intelligence to make a real-world impact? Our client is seeking an ambitious AI Software Engineer to help design and deliver innovative AI solutions for some of the worlds leading organisations. In this exciting role, youll play a key part in the technical delivery of AI applications for clients and help shape the future of their charity-focused product, Chat2Impact. Youll work closely with clients and their internal teams to bring ideas to life from concept through to deployment helping businesses and charities use AI for good. This is a 4 day a week role (Mon-Thurs), with a competitive salary up to £70k (Pro Rata). * Take ownership of the technical implementation of AI solutions across diverse client projects. * Collaborate with the Innovation Lead and clients to shape, design and explain potential solutions.
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Related Jobs
Locations
- The City, City (EC3)
- The City, City (EC4)
- Canary Wharf
- Datchet Common
- Euston
- Holborn
- Mayfair
- Shoreditch
- Southwark
- Thames View Industrial Park
- City of London
- Southampton
- Reading
- Central London
- West End
- East London
- Northampton
- Cheltenham
- Fareham
- Milton Keynes
- London
- Hampshire
- Berkshire
- Surrey
- Northamptonshire
- Buckinghamshire
- Gloucestershire
- Hertfordshire
- Oxfordshire
- Bedfordshire
- South East
- East Midlands
- Midlands
- South West