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        14 Permanent API jobs in Bicester + 20 miles

        256 exact matches jobs are outside your preferred location

        SwapAgent Senior Test Automation Engineer

        London Stock Exchange
        London
        Competitive
        Looking to hire an Automation Test Engineer, the role spans the automation of low-level business functional tests through to mid-level system integration tests. The successful candidate will have to co-ordinate with Operations Change Business Analysis team, Development teams, and Project managers, as well as testing teams. The successful candidate will have an excellent QA background with experience of a variety of automation test tools, technologies and have business domain expertise and experience of delivery in complex fast moving environments. Excellent communication skills will be vital in this role. The role will report to the Test Manager and work day to day with the Test Lead. Required Skills and Experience * Extensive automation testing experience in Investment Banking IT, preparing and executing automated tests on a Financial platforms.
        Looking to hire an Automation Test Engineer, the role spans the automation of low-level business functional tests through to mid-level system integration tests. The successful candidate will have to co-ordinate with Operations Change Business Analysis team, Development teams, and Project managers, as well as testing teams. The successful candidate will have an excellent QA background with experience of a variety of automation test tools, technologies and have business domain expertise and experience of delivery in complex fast moving environments. Excellent communication skills will be vital in this role. The role will report to the Test Manager and work day to day with the Test Lead. Required Skills and Experience * Extensive automation testing experience in Investment Banking IT, preparing and executing automated tests on a Financial platforms.
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        LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. Its how weve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services and our open-access model we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.
        LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. Its how weve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services and our open-access model we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.
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        FTSE Russell | LSEG Technology - FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a junior software engineer to be part a dynamic team building the distribution capabilities of our index products to the financial community worldwide.
        FTSE Russell | LSEG Technology - FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a junior software engineer to be part a dynamic team building the distribution capabilities of our index products to the financial community worldwide.
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        FTSE Russell | LSEG Technology - FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a senior software engineer to be part a dynamic team of software engineers building all distribution capabilities of our index products to the financial community wor
        FTSE Russell | LSEG Technology - FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a senior software engineer to be part a dynamic team of software engineers building all distribution capabilities of our index products to the financial community wor
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        Hybrid: London (1-2 days per week in the office) Paying up to £70,000 + benefits - Permanent - Experis are delighted to be supporting a well-established and reputable organisation as they continue to strengthen and modernise their digital client-facing capabilities. We are assisting them in the search for a Seismic Developer, a key role within the Brand & Digital Services division, responsible for designing and developing advanced Seismic LiveDoc solutions that enhance client experience, streamline document creation, and enable front-office teams to work more efficiently. This is a fantastic opportunity for someone with deep Seismic expertise who enjoys building automated, scalable, and visually polished documentation solutions. You'll join an experienced team of Seismic specialists in a highly collaborative environment, supporting a well-embedded and strategically im
        Hybrid: London (1-2 days per week in the office) Paying up to £70,000 + benefits - Permanent - Experis are delighted to be supporting a well-established and reputable organisation as they continue to strengthen and modernise their digital client-facing capabilities. We are assisting them in the search for a Seismic Developer, a key role within the Brand & Digital Services division, responsible for designing and developing advanced Seismic LiveDoc solutions that enhance client experience, streamline document creation, and enable front-office teams to work more efficiently. This is a fantastic opportunity for someone with deep Seismic expertise who enjoys building automated, scalable, and visually polished documentation solutions. You'll join an experienced team of Seismic specialists in a highly collaborative environment, supporting a well-embedded and strategically im
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        FEATURED
        Location: London - 1x a month - Salary: Up to £120,000 (D.O.E) + benefits - Fruition Group are partnering with a high-growth Insurtech unicorn that's scaling its engineering function. This is a unique chance to work across both proven, revenue-generating products and greenfield initiatives that are reshaping the future of insurance. It's an ideal role for a driven Lead Engineer who thrives in ambitious environments and wants to make a tangible impact. As a Lead Backend Engineer, you'll take ownership of designing and scaling cloud-native backend systems. You'll work primarily with Python (FastAPI) and play a key role in shaping the architecture of microservices that support millions of users. Beyond hands-on development, you'll provide technical leadership, mentor team members, and influence strategic engineering decisions.
        Location: London - 1x a month - Salary: Up to £120,000 (D.O.E) + benefits - Fruition Group are partnering with a high-growth Insurtech unicorn that's scaling its engineering function. This is a unique chance to work across both proven, revenue-generating products and greenfield initiatives that are reshaping the future of insurance. It's an ideal role for a driven Lead Engineer who thrives in ambitious environments and wants to make a tangible impact. As a Lead Backend Engineer, you'll take ownership of designing and scaling cloud-native backend systems. You'll work primarily with Python (FastAPI) and play a key role in shaping the architecture of microservices that support millions of users. Beyond hands-on development, you'll provide technical leadership, mentor team members, and influence strategic engineering decisions.
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        Location: London - 1x a month - Salary: Up to £95,000 (D.O.E) + benefits - Fruition Group working with a leading Insurtech unicorn on a mission to transform the insurance industry. Their products have already generated millions in revenue, and now they're investing heavily in new innovations that will shape the sector for years to come. This is an exciting opportunity for a motivated Senior Engineer who wants to grow in a high-performing, forward-thinking business. As a Senior Backend Engineer, you'll play a central role in building and scaling the systems that power their insurance platform. You'll focus on developing Python-based cloud microservices (FastAPI preferred), contributing to the architecture of resilient, high-performance systems, and collaborating with a cross-functional team to deliver features at pace.
        Location: London - 1x a month - Salary: Up to £95,000 (D.O.E) + benefits - Fruition Group working with a leading Insurtech unicorn on a mission to transform the insurance industry. Their products have already generated millions in revenue, and now they're investing heavily in new innovations that will shape the sector for years to come. This is an exciting opportunity for a motivated Senior Engineer who wants to grow in a high-performing, forward-thinking business. As a Senior Backend Engineer, you'll play a central role in building and scaling the systems that power their insurance platform. You'll focus on developing Python-based cloud microservices (FastAPI preferred), contributing to the architecture of resilient, high-performance systems, and collaborating with a cross-functional team to deliver features at pace.
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        Lead PHP Developer

        Rise Technical Recruitment Limited
        Swindon (SN1)
        £55000.00 - £65000.00 per annum + Bonus + Progression
        Swindon (Hybrid - 3 days per-week) £55,000 - £65,000 + Bonus + Progression + Pension - An excellent opportunity awaits a Software Developer with strong PHP experience to join a growing technology-first business. The role offers technical variety, ownership and clear progression opportunities. This company is an established but expanding B2B business, with technology as its key differentiator they're looking to further grow and diversify their SaaS solutions offering. In this role, you'll take ownership of both new and existing systems, maintaining legacy code where needed while leading the design and development of new solutions. You'll work closely with the Head of Software to align on technical direction, while taking the hands-on lead in building and improving Laravel-based applications, managing APIs and third-party integrations.
        Swindon (Hybrid - 3 days per-week) £55,000 - £65,000 + Bonus + Progression + Pension - An excellent opportunity awaits a Software Developer with strong PHP experience to join a growing technology-first business. The role offers technical variety, ownership and clear progression opportunities. This company is an established but expanding B2B business, with technology as its key differentiator they're looking to further grow and diversify their SaaS solutions offering. In this role, you'll take ownership of both new and existing systems, maintaining legacy code where needed while leading the design and development of new solutions. You'll work closely with the Head of Software to align on technical direction, while taking the hands-on lead in building and improving Laravel-based applications, managing APIs and third-party integrations.
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        PREMIUM
        Were looking for an enthusiastic Senior/Staff Software Engineer who knows about graphics and GPU drivers, has a curious mind, and a passion for making high-impact products to join the Customer Engineering Team at ARMs GPU Group! In this role you will work on flagship devices with the world's most successful mobile companies. Take the skills you have developed in early engineering career and see them used in a wider business context. Be part of and be well supported by a team of experts! * Developing the high-level graphics APIs of our Mali driver: Vulkan, OpenCL, OpenGL ES, EGL. * Working with some of the biggest names in the consumer electronics space on their latest and greatest platforms. * Integrate and optimise our software into their flagship devices to show the world what Mali can do. * Experienced with graphics APIs such as Vulkan, OpenGL ES, and EGL (Khronos)
        Were looking for an enthusiastic Senior/Staff Software Engineer who knows about graphics and GPU drivers, has a curious mind, and a passion for making high-impact products to join the Customer Engineering Team at ARMs GPU Group! In this role you will work on flagship devices with the world's most successful mobile companies. Take the skills you have developed in early engineering career and see them used in a wider business context. Be part of and be well supported by a team of experts! * Developing the high-level graphics APIs of our Mali driver: Vulkan, OpenCL, OpenGL ES, EGL. * Working with some of the biggest names in the consumer electronics space on their latest and greatest platforms. * Integrate and optimise our software into their flagship devices to show the world what Mali can do. * Experienced with graphics APIs such as Vulkan, OpenGL ES, and EGL (Khronos)
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        Senior ML Engineer

        Oscar Associates (UK) Limited
        London
        £70000 - £90000 per annum
        Senior Machine Learning Engineer - Salary: £70,000-£90,000 - Location: London (Hybrid) The Opportunity - We're looking for a Senior Machine Learning Engineer to help design, build, and deliver next-generation AI systems. You will work across LLMs, retrieval-augmented generation (RAG), and modern agent frameworks to transform large, unstructured data into meaningful insights and production-ready capabilities. This is a hands-on role within a growing AI team, offering the chance to shape architecture, build scalable pipelines, and ship features that directly impact users. Responsibilities * Develop, integrate, and fine-tune LLMs for natural-language understanding, reasoning, and workflow automation. * Build agentic/LLM-driven workflows for multi-step decision making across diverse data sources. * Architect and deliver ML features such as pattern recognition, entity extr
        Senior Machine Learning Engineer - Salary: £70,000-£90,000 - Location: London (Hybrid) The Opportunity - We're looking for a Senior Machine Learning Engineer to help design, build, and deliver next-generation AI systems. You will work across LLMs, retrieval-augmented generation (RAG), and modern agent frameworks to transform large, unstructured data into meaningful insights and production-ready capabilities. This is a hands-on role within a growing AI team, offering the chance to shape architecture, build scalable pipelines, and ship features that directly impact users. Responsibilities * Develop, integrate, and fine-tune LLMs for natural-language understanding, reasoning, and workflow automation. * Build agentic/LLM-driven workflows for multi-step decision making across diverse data sources. * Architect and deliver ML features such as pattern recognition, entity extr
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        AI Specialist

        Barker Ross Group
        West Bridge, Leicester (LE1), LE1 1QG
        £30,000 per annum
        Barker Ross is a £50m+ recruitment business supplying industrial, warehouse, food manufacturing and construction staff across the UK. Were serious about using AI and automation to make life easier for our consultants and better for our clients and this role sits right at the heart of that. The role - Youll be the in-house AI & automation go-to owning, improving and expanding how we use AI across the business. * Designing and building AI-powered workflows to save time for sales, ops and back-office teams * Creating and maintaining automations between our CRM, job boards, marketing tools and reporting systems * Developing prompts, templates and tools to help consultants write better adverts, emails and messages faster * Working with the MD and leadership team to identify process bottlenecks and turn them into automated solutions
        Barker Ross is a £50m+ recruitment business supplying industrial, warehouse, food manufacturing and construction staff across the UK. Were serious about using AI and automation to make life easier for our consultants and better for our clients and this role sits right at the heart of that. The role - Youll be the in-house AI & automation go-to owning, improving and expanding how we use AI across the business. * Designing and building AI-powered workflows to save time for sales, ops and back-office teams * Creating and maintaining automations between our CRM, job boards, marketing tools and reporting systems * Developing prompts, templates and tools to help consultants write better adverts, emails and messages faster * Working with the MD and leadership team to identify process bottlenecks and turn them into automated solutions
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        Cloud Native Engineer (AWS)

        Sanderson Government and Defence
        Cheltenham (GL50), GL50
        £50000 - £115000 per annum + Bonuses
        Cloud Native Engineer (Software, DevOps, Architecture) - National Security - Location: Cheltenham, UK (Hybrid) Software: to £90,000 - DevOps: to £100,000 - Architect: to £115,000 - About the Opportunity * Software Engineering (Java, full stack, microservices) * DevOps / Platform Engineering (Kubernetes, automation, cloud) * Solution & Cloud Architecture (distributed systems, event-driven design) You'll work hands-on building secure, scalable systems; shaping technical direction; and contributing to a collaborative engineering culture focused on simplicity, resilience, and impact. If you enjoy modern cloud-native tech, solving meaningful problems, and being part of a growing consultancy shaping its identity-this is the place to do it. Key Responsibilities (Responsibilities vary slightly but share the same cloud-native foundation.) Software Engineering
        Cloud Native Engineer (Software, DevOps, Architecture) - National Security - Location: Cheltenham, UK (Hybrid) Software: to £90,000 - DevOps: to £100,000 - Architect: to £115,000 - About the Opportunity * Software Engineering (Java, full stack, microservices) * DevOps / Platform Engineering (Kubernetes, automation, cloud) * Solution & Cloud Architecture (distributed systems, event-driven design) You'll work hands-on building secure, scalable systems; shaping technical direction; and contributing to a collaborative engineering culture focused on simplicity, resilience, and impact. If you enjoy modern cloud-native tech, solving meaningful problems, and being part of a growing consultancy shaping its identity-this is the place to do it. Key Responsibilities (Responsibilities vary slightly but share the same cloud-native foundation.) Software Engineering
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        FEATURED
        Define and govern API-led connectivity and enterprise integration patterns * Deep understanding of MuleSoft architecture, integration patterns, and API-led design
        Define and govern API-led connectivity and enterprise integration patterns * Deep understanding of MuleSoft architecture, integration patterns, and API-led design
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        NEWFEATURED

        Solution Architect

        Henderson Scott
        North West London, London, NW1 7AW
        £70000.00 - £75000.00 per annum + Highly Remote, 30 days AL+BH
        Maintain and enforce standards for API design, integration patterns, data schemas (including Medallion architecture), and security (RBAC, data classification).
        Maintain and enforce standards for API design, integration patterns, data schemas (including Medallion architecture), and security (RBAC, data classification).
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        FEATURED
        The successful applicant will have comprehensive expertise in Microsoft Azure services, Web API, Azure App Service, .NET Core, and Visual Studio. * Design and implement scalable cloud solutions utilizing Azure App Service, Web API, and .NET Core. * Define architecture patterns for microservices, API management, and integration with enterprise systems. * Utilize Azure Functions, Azure Logic Apps, Azure API Management, and Azure Storage to develop robust applications. * Expertise in Microsoft Azure services, including App Service, Functions, API Management, Storage, and Networking. * Strong knowledge of .NET Core, Web API, C#, and Visual Studio.
        The successful applicant will have comprehensive expertise in Microsoft Azure services, Web API, Azure App Service, .NET Core, and Visual Studio. * Design and implement scalable cloud solutions utilizing Azure App Service, Web API, and .NET Core. * Define architecture patterns for microservices, API management, and integration with enterprise systems. * Utilize Azure Functions, Azure Logic Apps, Azure API Management, and Azure Storage to develop robust applications. * Expertise in Microsoft Azure services, including App Service, Functions, API Management, Storage, and Networking. * Strong knowledge of .NET Core, Web API, C#, and Visual Studio.
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        The Service is one of the fastest growing streams in the LCH business lines and is looking to build on recent successes and further increase market share through modernising and enhancing our external facing application and API by delivering powerful and scalable functionality to meet evolving market demands.
        The Service is one of the fastest growing streams in the LCH business lines and is looking to build on recent successes and further increase market share through modernising and enhancing our external facing application and API by delivering powerful and scalable functionality to meet evolving market demands.
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        Microservices architecture, API-first approach, containerisation (Docker/Kubernetes), CI/CD pipelines * Knowledge of integration patterns, API gateways, and cloud-native deployments
        Microservices architecture, API-first approach, containerisation (Docker/Kubernetes), CI/CD pipelines * Knowledge of integration patterns, API gateways, and cloud-native deployments
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        Frequently Asked Questions

        How many permanent API jobs are there in Bicester?
        There are 14 permanent API jobs within 20 miles of Bicester available on CWJobs right now.

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