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        43 Part Time API jobs in South East + 20 miles

        Quantitative Engineer

        London Stock Exchange
        London
        Competitive
        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 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 hands-on dynamic software development leader to drive a team of software engineers building robust equity index capabilities and indexes.
        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 hands-on dynamic software development leader to drive a team of software engineers building robust equity index capabilities and indexes.
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        Role Summary - LSEGs ambition is to be one of the worlds greatest companies and best places to work. To achieve this, we are on a journey of building a world class engineering function supporting our Customer Data Master (CDM) Platform team. The team has embarked on a journey to provide internal teams and platform teams with a fully managed customer data master platform. The role will take part in the definition of the CDM strategy and execution of the CDM engineering strategy and deliver the technology capability, in line with the Corporate Engineering (CE) strategy which includes evolving our current master data capability. What youll be doing * Lead a senior engineering team (5 growing to ~10 across Reltio and data integration) to design, build and run the Customer MDM platform as a durable product with clear ownership.
        Role Summary - LSEGs ambition is to be one of the worlds greatest companies and best places to work. To achieve this, we are on a journey of building a world class engineering function supporting our Customer Data Master (CDM) Platform team. The team has embarked on a journey to provide internal teams and platform teams with a fully managed customer data master platform. The role will take part in the definition of the CDM strategy and execution of the CDM engineering strategy and deliver the technology capability, in line with the Corporate Engineering (CE) strategy which includes evolving our current master data capability. What youll be doing * Lead a senior engineering team (5 growing to ~10 across Reltio and data integration) to design, build and run the Customer MDM platform as a durable product with clear ownership.
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        Are you an Engineer with a background in C++? Are you a Software Engineer looking for a new challenge or to join global multi billion dollar company? If so I'd like to speak with you! An exciting opportunity has arisen for a Software Developer - C++ based in Isle of Wight to join a market leading technology organisation. Due to continued growth they are seeking a Software Developer - C++ in their Isle of Wight office to be responsible for research, design, implementation and testing of software products and solutions. The Software Developer C++ will directly report to the Software Engineer Manager. * Develop easy-to-use web applications * Control automated testing, and manage their deployments * Collaborate with front-end and back-end teams to ensure front-end design integrate with the back-end systems * Writing front-end code * Rewrite front-end web pages
        Are you an Engineer with a background in C++? Are you a Software Engineer looking for a new challenge or to join global multi billion dollar company? If so I'd like to speak with you! An exciting opportunity has arisen for a Software Developer - C++ based in Isle of Wight to join a market leading technology organisation. Due to continued growth they are seeking a Software Developer - C++ in their Isle of Wight office to be responsible for research, design, implementation and testing of software products and solutions. The Software Developer C++ will directly report to the Software Engineer Manager. * Develop easy-to-use web applications * Control automated testing, and manage their deployments * Collaborate with front-end and back-end teams to ensure front-end design integrate with the back-end systems * Writing front-end code * Rewrite front-end web pages
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        FEATURED
        As a Senior Engineer in the Staines-upon-Thames based Graphics Research Team, you will play a key role in developing high-performance graphics solutions for mobile devices. You will integrate solutions with new hardware platforms optimise the Android OS graphics stack, benchmark systems against competitors to ensure the best possible graphics on the market. This is a fantastic opportunity to shape the future of mobile graphics and contribute to the next generation of mobile devices, while working with state-of-the-art technology. Key Responsibilities for the Senior Engineer * Innovate and optimise real-time rendering pipelines for exceptional performance. * Implement features and extensions for the Android Graphics stack (e.G., SurfaceFlinger, SKIA, HWUI). * Analyse graphics workloads, identify bottlenecks, and improve performance and power efficiency.
        As a Senior Engineer in the Staines-upon-Thames based Graphics Research Team, you will play a key role in developing high-performance graphics solutions for mobile devices. You will integrate solutions with new hardware platforms optimise the Android OS graphics stack, benchmark systems against competitors to ensure the best possible graphics on the market. This is a fantastic opportunity to shape the future of mobile graphics and contribute to the next generation of mobile devices, while working with state-of-the-art technology. Key Responsibilities for the Senior Engineer * Innovate and optimise real-time rendering pipelines for exceptional performance. * Implement features and extensions for the Android Graphics stack (e.G., SurfaceFlinger, SKIA, HWUI). * Analyse graphics workloads, identify bottlenecks, and improve performance and power efficiency.
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        FEATURED
        This means writing high-quality code, solving complex problems in live production, and tackling challenges that impact over 2 billion people worldwide. Our PEs are embedded in teams across the spectrum from products like Instagram, WhatsApp, Oculus, and Videos to critical backend services such as Storage, Cache, and Networking. The team brings together diverse levels of experience and backgrounds. Working alongside some of the best engineers in the industry, youll contribute to code and systems that go into production and are used by millions every day. In Production Engineering at Meta, we navigate uncharted waters daily solving problems at a scale few others face. * Own the end-to-end reliability and scalability of the platforms, services, and products built on top of Metas underlying infrastructure and network
        This means writing high-quality code, solving complex problems in live production, and tackling challenges that impact over 2 billion people worldwide. Our PEs are embedded in teams across the spectrum from products like Instagram, WhatsApp, Oculus, and Videos to critical backend services such as Storage, Cache, and Networking. The team brings together diverse levels of experience and backgrounds. Working alongside some of the best engineers in the industry, youll contribute to code and systems that go into production and are used by millions every day. In Production Engineering at Meta, we navigate uncharted waters daily solving problems at a scale few others face. * Own the end-to-end reliability and scalability of the platforms, services, and products built on top of Metas underlying infrastructure and network
        more
        This means writing high-quality code, solving complex problems in live production, and tackling challenges that impact over 2 billion people worldwide. Our PEs are embedded in teams across the spectrum from products like Instagram, WhatsApp, Oculus, and Videos to critical backend services such as Storage, Cache, and Networking. The team brings together diverse levels of experience and backgrounds. Working alongside some of the best engineers in the industry, youll contribute to code and systems that go into production and are used by millions every day. In Production Engineering at Meta, we navigate uncharted waters daily solving problems at a scale few others face. * Own back-end services like our container fleet management systems, front-end services like Chat and Newsfeed, infrastructure components like our Memcache infrastructure, and everything in between
        This means writing high-quality code, solving complex problems in live production, and tackling challenges that impact over 2 billion people worldwide. Our PEs are embedded in teams across the spectrum from products like Instagram, WhatsApp, Oculus, and Videos to critical backend services such as Storage, Cache, and Networking. The team brings together diverse levels of experience and backgrounds. Working alongside some of the best engineers in the industry, youll contribute to code and systems that go into production and are used by millions every day. In Production Engineering at Meta, we navigate uncharted waters daily solving problems at a scale few others face. * Own back-end services like our container fleet management systems, front-end services like Chat and Newsfeed, infrastructure components like our Memcache infrastructure, and everything in between
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        Most functionality is written by the API or integrations team but we need a strong developer that can do both.
        Most functionality is written by the API or integrations team but we need a strong developer that can do both.
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        NEWFEATURED
        Design and implement complex data flows, API integrations, and background processing systems that handle high-volume operations reliably while maintaining system performance and data integrity * RESTful API design and implementation
        Design and implement complex data flows, API integrations, and background processing systems that handle high-volume operations reliably while maintaining system performance and data integrity * RESTful API design and implementation
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        Senior Test Engineer

        Department for Energy Security & Net Zero
        London
        £42,385 - £51,540 a year
        Lead the design and implementation of comprehensive quality strategies across platforms like Salesforce, Azure, and AWS, including test approaches (unit, integration, API, UI, performance, security, accessibility) and automation frameworks using C#, Python, Apex, and TypeScript. Proven test automation skills using tools like Selenium, Playwright, Cypress, pytest, xUnit/NUnit, or Jest for functional, integration, API, and end-to-end testing.
        Lead the design and implementation of comprehensive quality strategies across platforms like Salesforce, Azure, and AWS, including test approaches (unit, integration, API, UI, performance, security, accessibility) and automation frameworks using C#, Python, Apex, and TypeScript. Proven test automation skills using tools like Selenium, Playwright, Cypress, pytest, xUnit/NUnit, or Jest for functional, integration, API, and end-to-end testing.
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        NEW
        About the Opportunity - Join Contentfuls AI Platform team as a Senior Engineering Manager - AI Platform (f/m/d) and play a pivotal role in shaping the next generation of AI-powered, developer-friendly platform capabilities. Our AI Platform teams are building the trusted foundation that enables Contentful and our customers to confidently deliver AI-enabled experiences. * Empowering customers and internal teams to build accurate, trustworthy, and governed agentic solutions that are easy and intuitive to adopt. * Providing enterprise-ready access to LLMs that enables product teams across Contentful to deliver secure, scalable, and reliable AI-powered features. This is an excellent opportunity for a technical manager who thrives at the intersection of product development, platform engineering, and cross-functional collaboration.
        About the Opportunity - Join Contentfuls AI Platform team as a Senior Engineering Manager - AI Platform (f/m/d) and play a pivotal role in shaping the next generation of AI-powered, developer-friendly platform capabilities. Our AI Platform teams are building the trusted foundation that enables Contentful and our customers to confidently deliver AI-enabled experiences. * Empowering customers and internal teams to build accurate, trustworthy, and governed agentic solutions that are easy and intuitive to adopt. * Providing enterprise-ready access to LLMs that enables product teams across Contentful to deliver secure, scalable, and reliable AI-powered features. This is an excellent opportunity for a technical manager who thrives at the intersection of product development, platform engineering, and cross-functional collaboration.
        more
        At Capgemini Invent, we believe difference drives change. As inventive transformation consultants, we blend our strategic, creative and scientific capabilities, collaborating closely with clients to deliver cutting-edge solutions. Join us to drive transformation tailored to our client's challenges of today and tomorrow. Informed and validated by science and data. Superpowered by creativity and design. All underpinned by technology created with purpose. Our C#/.NET Full Stack Engineers are responsible for creating the visions of our clients and driving better business outcomes. They are tasked with building cutting-edge digital solutions for our clients, combining a clear understanding of business value and a consultative approach to make the difference. They will be able to work on a vast variety of projects and get exposure to a variety of technology such as (but not
        At Capgemini Invent, we believe difference drives change. As inventive transformation consultants, we blend our strategic, creative and scientific capabilities, collaborating closely with clients to deliver cutting-edge solutions. Join us to drive transformation tailored to our client's challenges of today and tomorrow. Informed and validated by science and data. Superpowered by creativity and design. All underpinned by technology created with purpose. Our C#/.NET Full Stack Engineers are responsible for creating the visions of our clients and driving better business outcomes. They are tasked with building cutting-edge digital solutions for our clients, combining a clear understanding of business value and a consultative approach to make the difference. They will be able to work on a vast variety of projects and get exposure to a variety of technology such as (but not
        more
        Please note - This program starts in July 2026 - VIAVI (NASDAQ: VIAV) is a global provider of network test, monitoring and assurance solutions for telecommunications, cloud, enterprises, first responders, military, aerospace, and railway. VIAVI is also a leader in light management technologies for 3D sensing, anti-counterfeiting, consumer electronics, industrial, automotive, government and aerospace applications. We are the people behind the products that help keep the world connected at home, school, work, at play, and everywhere in between. VIAVI employees are passionate about supporting customer success and we welcome people who bring their best every day to the company to question, to collaborate and to push for solutions that will delight our customers. Program Overview - Kick-start your professional adventure in our R&D Excellence Centers by joining multiple exp
        Please note - This program starts in July 2026 - VIAVI (NASDAQ: VIAV) is a global provider of network test, monitoring and assurance solutions for telecommunications, cloud, enterprises, first responders, military, aerospace, and railway. VIAVI is also a leader in light management technologies for 3D sensing, anti-counterfeiting, consumer electronics, industrial, automotive, government and aerospace applications. We are the people behind the products that help keep the world connected at home, school, work, at play, and everywhere in between. VIAVI employees are passionate about supporting customer success and we welcome people who bring their best every day to the company to question, to collaborate and to push for solutions that will delight our customers. Program Overview - Kick-start your professional adventure in our R&D Excellence Centers by joining multiple exp
        more

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        What is the average salary for API in South East?

        Average salary per year
        £67,499

        The average salary for a API in South East is £67,499. API in South East salaries range from £52,499 to £82,499.

        Frequently Asked Questions

        How many part time API jobs are there in South East?
        There are 43 part time API jobs within 20 miles of South East available on JustEngineers right now.

        Where in South East are these part time jobs?
        You can find part time jobs in London, Kent, Berkshire.

        What other similar jobs are there to part time API jobs in South East?
        As well as part time API jobs in South East, you can find part time Engineering, Software Development, Management, amongst many others.