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        41 Permanent API jobs in Grazeley + 20 miles

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        Transaction Banking - Software Engineering - Associate - London

        Goldman Sachs
        London
        Competitive
        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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        NEW
        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.
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        NEW
        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.
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        NEW

        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 -
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        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.
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        NEW
        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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        NEW
        A leading technical consultancy is seeking a Full Stack Integration Developer for an Outside IR35 contract. This hybrid role (London-based) offers and requires SC Clearance. You'll play a key role in a large-scale digitisation program, developing and integrating modern web applications within an Azure ecosystem. While primarily hands-on, you'll also contribute to architectural design and strategy. * Application Development: Build and maintain scalable web applications using .NET (C#, ASP.NET Core) and Azure Functions. * Front-End Development: Develop modern UIs using NextJS and other JavaScript frameworks. * Integration & Backend: Work with Azure Service Bus, Event Grid, and Static Web Apps. Design and optimize SQL Server databases, stored procedures, and APIs. * DevOps & Infrastructure: Create and manage CI/CD pipelines using Azure DevOps, GitHub Actions, or Jenkins.
        A leading technical consultancy is seeking a Full Stack Integration Developer for an Outside IR35 contract. This hybrid role (London-based) offers and requires SC Clearance. You'll play a key role in a large-scale digitisation program, developing and integrating modern web applications within an Azure ecosystem. While primarily hands-on, you'll also contribute to architectural design and strategy. * Application Development: Build and maintain scalable web applications using .NET (C#, ASP.NET Core) and Azure Functions. * Front-End Development: Develop modern UIs using NextJS and other JavaScript frameworks. * Integration & Backend: Work with Azure Service Bus, Event Grid, and Static Web Apps. Design and optimize SQL Server databases, stored procedures, and APIs. * DevOps & Infrastructure: Create and manage CI/CD pipelines using Azure DevOps, GitHub Actions, or Jenkins.
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        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.
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        Full Stack Engineer / Developer (JavaScript Vue.js Python) London to £100k - Do you enjoy working with a range of programming languages? You could be progressing your career in a senior, hands-on Full Stack 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 Full Stack 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 en
        Full Stack Engineer / Developer (JavaScript Vue.js Python) London to £100k - Do you enjoy working with a range of programming languages? You could be progressing your career in a senior, hands-on Full Stack 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 Full Stack 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 en
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        NEWPREMIUM
        Hawkrose is delighted to announce we are hiring for the role of Senior Software Developer. In this role, the successful candidate will be responsible for the delivery of exciting projects and products across our Civil Aviation, Defence and Public Sector industry verticals. The successful candidate will be given the autonomy to set their own direction of work, and will work closely with the Head of Development to establish best practice across the Hawkrose development function. The role requires a mixture of home and office working with the expectation that the successful candidate will manage their own time and location to best deliver for our customers. Required Skills - The successful candidate will be a full stack software engineer with experience of enterprise grade software development and an agile development environment.
        Hawkrose is delighted to announce we are hiring for the role of Senior Software Developer. In this role, the successful candidate will be responsible for the delivery of exciting projects and products across our Civil Aviation, Defence and Public Sector industry verticals. The successful candidate will be given the autonomy to set their own direction of work, and will work closely with the Head of Development to establish best practice across the Hawkrose development function. The role requires a mixture of home and office working with the expectation that the successful candidate will manage their own time and location to best deliver for our customers. Required Skills - The successful candidate will be a full stack software engineer with experience of enterprise grade software development and an agile development environment.
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        NEW
        Role: Full Stack Software Engineer (UK-based, early-stage startup) £60,000 - £80,000 per annum | No Sponsorship | x3 week in office - Backed by technology start up accelerator and VC - Join a mission-driven AI startup transforming how medical and healthcare organisations collaborate. Using machine learning and advanced recommendation systems, the team helps to matchmake some of the leading Medical and Pharmaceuticalbusinesses with their extensive network of professionals. This allows them to engage seamlessly all while reducing operational costs so resources can focus on changing lives. This is the chance to work on cutting-edge AI technology at an early stage with real influence on product and architecture to help medical organisations do more with their resources while changing lives and impact clients across the US and FTSE markets.
        Role: Full Stack Software Engineer (UK-based, early-stage startup) £60,000 - £80,000 per annum | No Sponsorship | x3 week in office - Backed by technology start up accelerator and VC - Join a mission-driven AI startup transforming how medical and healthcare organisations collaborate. Using machine learning and advanced recommendation systems, the team helps to matchmake some of the leading Medical and Pharmaceuticalbusinesses with their extensive network of professionals. This allows them to engage seamlessly all while reducing operational costs so resources can focus on changing lives. This is the chance to work on cutting-edge AI technology at an early stage with real influence on product and architecture to help medical organisations do more with their resources while changing lives and impact clients across the US and FTSE markets.
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        NEWFEATURED

        Full Stack Engineer

        MATCHED GROUP LIMITED
        City of London, London, EC4M 5SB
        From £75,000 to £85,000 per annum
        Tech: AWS, NodeJS, TypeScript, JavaScript, ReactJS - Why?start-up financial services, revolutionising the industry - Location: Hybrid - 1/2 days in the office (Central London) Our Client - A new UK-based financial services provider is launching credit card, personal loans and insurance offerings aimed at delivering fair, flexible, and user-friendly financial products to consumers. The organisation is committed to empowering individuals by enhancing their understanding and control of personal finance through clarity, intelligence, and technology. Full StackEngineer-Responsibilities * Design, develop, and maintain advanced applications. * Collaborate with cross-functional teams to define, design, and ship new features. * Optimize components for maximum performance across a vast array of web- capable devices and browsers.
        Tech: AWS, NodeJS, TypeScript, JavaScript, ReactJS - Why?start-up financial services, revolutionising the industry - Location: Hybrid - 1/2 days in the office (Central London) Our Client - A new UK-based financial services provider is launching credit card, personal loans and insurance offerings aimed at delivering fair, flexible, and user-friendly financial products to consumers. The organisation is committed to empowering individuals by enhancing their understanding and control of personal finance through clarity, intelligence, and technology. Full StackEngineer-Responsibilities * Design, develop, and maintain advanced applications. * Collaborate with cross-functional teams to define, design, and ship new features. * Optimize components for maximum performance across a vast array of web- capable devices and browsers.
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        NEW

        JavaScript Developer - Hybrid Remote

        VERTECH GROUP (UK) LTD
        N7, North London
        From £80,000 to £100,000 per annum + Benefits
        JavaScript Developer - Location: 3-4 days per wk from home / 1-2 days in London - Salary: Circa 80k 100k + Benefits - JavaScript Developer required byrequired by fast-growing, revolutionary tech company! This is a varied, challenging role in a talented team where youll be responsible for developing scalable backend services that bring their AI vision to life. You dont need to be a machine learning researcher but you do need to know how to integrate modern AI capabilities into productions * At least 4 years backend development experience * Solid expertise in Node.js * Experience integrating LLM APIs and open-source models into production systems * Hands-on work implementing Retrieval-Augmented Generation (RAG) pipelines * Experience designing and optimizing agentic AI workflows - Tremendous opportunity offering plenty of scope for career progression in a friendly, inno
        JavaScript Developer - Location: 3-4 days per wk from home / 1-2 days in London - Salary: Circa 80k 100k + Benefits - JavaScript Developer required byrequired by fast-growing, revolutionary tech company! This is a varied, challenging role in a talented team where youll be responsible for developing scalable backend services that bring their AI vision to life. You dont need to be a machine learning researcher but you do need to know how to integrate modern AI capabilities into productions * At least 4 years backend development experience * Solid expertise in Node.js * Experience integrating LLM APIs and open-source models into production systems * Hands-on work implementing Retrieval-Augmented Generation (RAG) pipelines * Experience designing and optimizing agentic AI workflows - Tremendous opportunity offering plenty of scope for career progression in a friendly, inno
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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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        NEWFEATURED

        Java Developer - Active SC

        Hays
        London
        £600.0 - £640.0 per day + up to £640 pd (Inside IR35)
        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
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        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.
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        NEWFEATURED

        Backend Engineer - London Onsite

        LJ Recruitment Limited
        EC1, City of London
        £60000 - £75000 per annum
        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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        NEWFEATURED

        Java Developer

        Eligo Recruitment Limited
        Southwark, SE1
        £500 - £650 per day
        Contract Back-End Java Engineer Remote up to £650 per day - 12-month contract (with potential extension) Are you an experienced Back-End Java Engineer with proven experience in the gambling industry? This is a fantastic opportunity to work on large-scale, high-traffic platforms for a well-known operator, delivering critical back-end services in a modern, distributed environment. This is a fully remote contract (UKbased), initially for 12 months with strong potential to extend. Key Requirements * You have strong commercial experience with Java and frameworks such as Spring/Spring Boot. * You bring solid cloud experience (preferably AWS) and are confident working with Kubernetes and Docker. * Youre skilled with messaging systems and APIs (Kafka, ActiveMQ, JMS, REST, CometD). * You have hands-on experience with databases (DB2, MongoDB, MySQL). * You understand caching te
        Contract Back-End Java Engineer Remote up to £650 per day - 12-month contract (with potential extension) Are you an experienced Back-End Java Engineer with proven experience in the gambling industry? This is a fantastic opportunity to work on large-scale, high-traffic platforms for a well-known operator, delivering critical back-end services in a modern, distributed environment. This is a fully remote contract (UKbased), initially for 12 months with strong potential to extend. Key Requirements * You have strong commercial experience with Java and frameworks such as Spring/Spring Boot. * You bring solid cloud experience (preferably AWS) and are confident working with Kubernetes and Docker. * Youre skilled with messaging systems and APIs (Kafka, ActiveMQ, JMS, REST, CometD). * You have hands-on experience with databases (DB2, MongoDB, MySQL). * You understand caching te
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        Senior Java Software Engineer

        Run-Time Group Ltd
        SW19, South West London
        From £70,000 to £85,000 per annum
        Job Title: Mid-Senior Java Engineer - Location:London (Hybrid - 2-3 days in-office) Salary:Up to £85,000 per annum + Benefits - Sector:Financial Services - We are seeking aSenior-Level Java Engineerto join a dynamic financial technology team in London. You will play a key role in developing, maintaining, and enhancing high-performance, scalable financial applications. This is a fantastic opportunity for an ambitious developer with experience in Java and a passion for the financial sector. The role follows a hybrid working model, with 2-3 days per week in the office. * Design, develop, and maintain high-quality Java-based applications for financial services. * Collaborate with cross-functional teams to deliver robust and scalable software solutions. * Ensure code quality, security, and performance standards are met.
        Job Title: Mid-Senior Java Engineer - Location:London (Hybrid - 2-3 days in-office) Salary:Up to £85,000 per annum + Benefits - Sector:Financial Services - We are seeking aSenior-Level Java Engineerto join a dynamic financial technology team in London. You will play a key role in developing, maintaining, and enhancing high-performance, scalable financial applications. This is a fantastic opportunity for an ambitious developer with experience in Java and a passion for the financial sector. The role follows a hybrid working model, with 2-3 days per week in the office. * Design, develop, and maintain high-quality Java-based applications for financial services. * Collaborate with cross-functional teams to deliver robust and scalable software solutions. * Ensure code quality, security, and performance standards are met.
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        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
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        FEATURED

        Java Quantitative Developer Low Latency

        James Joseph Associates Limited
        EC2N, City of London
        From £150,000 to £175,000 per annum Circa 50-100% Bonus + Pension + Be
        Our client is a leading and well-established player in the Digital Asset and Cryptocurrency Quantitative/Algorithmic trading industry. The business is going from strength to strength, they are currently going through a period of exponential growth and are enjoying record profits The business is actively expanding as there is additional headcount for a number trade platform specialist Java Development with a focus on either/or Quantitative Development or low-latency performance optimization. You will be working on greenfield projects to build out and enhance their low latency trading systems. Working in a fast-paced trading environment as a Quant Developer, where you will collaborate closely with expert traders, quantitative analysts, and engineering specialists to craft and fine-tune trading strategies across both spot and derivative markets.
        Our client is a leading and well-established player in the Digital Asset and Cryptocurrency Quantitative/Algorithmic trading industry. The business is going from strength to strength, they are currently going through a period of exponential growth and are enjoying record profits The business is actively expanding as there is additional headcount for a number trade platform specialist Java Development with a focus on either/or Quantitative Development or low-latency performance optimization. You will be working on greenfield projects to build out and enhance their low latency trading systems. Working in a fast-paced trading environment as a Quant Developer, where you will collaborate closely with expert traders, quantitative analysts, and engineering specialists to craft and fine-tune trading strategies across both spot and derivative markets.
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        Software Engineer Full Stack TypeScript

        Client Server
        South Kensington, SW7
        £65000 - £75000 per annum + benefits
        Software Engineer / Developer (TypeScript) London to £75k - Opportunity to progress your career at a Tech for Good company that is enabling life changing education to be accessed by students around the world. As a Software Engineer you will design and develop large, distributed, scalable web based systems, working within a modern cloud (AWS) microservices based environment; you'll be primarily using Typescript and Node for backend development, but will also have exposure to React on the frontend. You'll work across multiple teams and product streams in a collaborative environment that values code quality. The company are passionate about providing excellent education to hundreds of thousands of students around the world and support a number of causes and cutting edge research projects that improve the way people learn via real-time, live streaming technology as well a
        Software Engineer / Developer (TypeScript) London to £75k - Opportunity to progress your career at a Tech for Good company that is enabling life changing education to be accessed by students around the world. As a Software Engineer you will design and develop large, distributed, scalable web based systems, working within a modern cloud (AWS) microservices based environment; you'll be primarily using Typescript and Node for backend development, but will also have exposure to React on the frontend. You'll work across multiple teams and product streams in a collaborative environment that values code quality. The company are passionate about providing excellent education to hundreds of thousands of students around the world and support a number of causes and cutting edge research projects that improve the way people learn via real-time, live streaming technology as well a
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        NEWPREMIUM
        £260 Per Day - Fully Remote - 12 Month Contract - We’re looking for a Quality Engineer who’s passionate about building robust, reliable software and embedding quality into every stage of the development lifecycle. You might come from a testing or development background, but you’ll have a solid grasp of modern QA practices, automation, and cloud-native architectures. You’ll be confident in spotting issues early, designing test strategies that scale, and collaborating with engineers to deliver high-quality solutions for our customers. What you’ll do * Shape and execute test strategies with QA and engineering teams * Bring testing earlier into the SDLC to catch issues sooner * Use a mix of manual, exploratory and automated testing where it makes sense * Build and maintain automated tests that run reliably in CI/CD
        £260 Per Day - Fully Remote - 12 Month Contract - We’re looking for a Quality Engineer who’s passionate about building robust, reliable software and embedding quality into every stage of the development lifecycle. You might come from a testing or development background, but you’ll have a solid grasp of modern QA practices, automation, and cloud-native architectures. You’ll be confident in spotting issues early, designing test strategies that scale, and collaborating with engineers to deliver high-quality solutions for our customers. What you’ll do * Shape and execute test strategies with QA and engineering teams * Bring testing earlier into the SDLC to catch issues sooner * Use a mix of manual, exploratory and automated testing where it makes sense * Build and maintain automated tests that run reliably in CI/CD
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        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.
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        Frequently Asked Questions

        How many permanent API jobs are there in Grazeley?
        There are 41 permanent API jobs within 20 miles of Grazeley available on CWJobs right now.

        Where in Grazeley are these permanent jobs?
        You can find permanent jobs in The City, City (EC3), Southwark, The City, City (EC2).

        What other similar jobs are there to permanent API jobs in Grazeley?
        As well as permanent API jobs in Grazeley, you can find permanent IT, Software Development, Testing, amongst many others.