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        560 API jobs in London + 20 miles

        Golang Developer Kafka API - Start-up

        Client Server
        EC2A, City of London, EC2A 4EB
        £90000 - £110000 per annum + benefits
        Golang Developer / Backend Software Engineer (Go Kafka API) London / WFH to £110k Do you have a deep knowledge of Go / Golang combined with software architecture and design skills? You could be progressing your career as a Golang Developer at a start-up payments technology company that is revolutionising the payments industry to Africa, improving speed, cost and reliability. As a Golang Developer you'll focus on backend system design, event driven architecture and APIs with a focus on scalability and reliability. You'll join a small, collaborative, Agile team working on 2 week sprints, you'll be a key part of tech discussions and decision making. You'll join colleagues in the London, Canary Wharf offices four days a week. * You're an experience backend focussed Software Engineer with strong commercial Go / Golang development experience
        Golang Developer / Backend Software Engineer (Go Kafka API) London / WFH to £110k Do you have a deep knowledge of Go / Golang combined with software architecture and design skills? You could be progressing your career as a Golang Developer at a start-up payments technology company that is revolutionising the payments industry to Africa, improving speed, cost and reliability. As a Golang Developer you'll focus on backend system design, event driven architecture and APIs with a focus on scalability and reliability. You'll join a small, collaborative, Agile team working on 2 week sprints, you'll be a key part of tech discussions and decision making. You'll join colleagues in the London, Canary Wharf offices four days a week. * You're an experience backend focussed Software Engineer with strong commercial Go / Golang development experience
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        NEWPREMIUM
        Staff Software Engineer / Developer (Java Kotlin AWS API) Hybrid WFH to £110k Would you like to progress your career in an impactful hands-on Software Engineer role working on Tech for Good? You could be joining a HealthTech Start-up, founded by two highly successful, Cambridge University educated management consultants, that is aiming to improve patient and social care for all by using complex technology to improve access to patient records, enabling collaboration between healthcare providers and improving nursing and medical care. As a Staff Software Engineer you will collaborate with the CTO on the overall design and architecture of the products' tech stack, working on Greenfield applications. The tech stack is based on Kotlin, SpringBoot and AWS backend with TypeScript, React and Next.js on the front end.
        Staff Software Engineer / Developer (Java Kotlin AWS API) Hybrid WFH to £110k Would you like to progress your career in an impactful hands-on Software Engineer role working on Tech for Good? You could be joining a HealthTech Start-up, founded by two highly successful, Cambridge University educated management consultants, that is aiming to improve patient and social care for all by using complex technology to improve access to patient records, enabling collaboration between healthcare providers and improving nursing and medical care. As a Staff Software Engineer you will collaborate with the CTO on the overall design and architecture of the products' tech stack, working on Greenfield applications. The tech stack is based on Kotlin, SpringBoot and AWS backend with TypeScript, React and Next.js on the front end.
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        NEWPREMIUM

        Senior Developer / Consultant C# .Net

        Client Server
        Welham Green, AL9
        £70000 - £80000 per annum + benefits
        Are you an experienced Senior Developer / Consultant with strong C# skills? You could be progressing your career with at a growing Software Consultancy / MSP. As a Senior Developer / Consultant you will work with a long established client to help them modernise and transform legacy systems to modern microservices, cloud based solutions to support business growth. You'll collaborate with the client to understand their business needs and take a lead role in developing and delivering solutions, working closely with architects to align and evolve software designs and implementations with business strategies and requirements. You'll have a focus on backend C# .Net Core but will have exposure across the full tech stack. There's a remote first policy however, this client does require onsite presence at the Hatfield office three times per month.
        Are you an experienced Senior Developer / Consultant with strong C# skills? You could be progressing your career with at a growing Software Consultancy / MSP. As a Senior Developer / Consultant you will work with a long established client to help them modernise and transform legacy systems to modern microservices, cloud based solutions to support business growth. You'll collaborate with the client to understand their business needs and take a lead role in developing and delivering solutions, working closely with architects to align and evolve software designs and implementations with business strategies and requirements. You'll have a focus on backend C# .Net Core but will have exposure across the full tech stack. There's a remote first policy however, this client does require onsite presence at the Hatfield office three times per month.
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        NEWPREMIUM

        Mulesoft Technical Lead

        LA International Computer Consultants Ltd
        Lambeth, SE1 7ND
        £700 - £765 per day
        Required: Mulesoft Technical Lead Location: Remote Duration: 12 month initial contract IR35 Status: Inside Working with the Project Manager, architects, clients & other stakeholders to implement MuleSoft APIs. This role will require knowledge of MuleSoft's Anypoint Studio & Anypoint Platform, which includes Design Center, Runtime Manager, API Manager, Exchange, etc. You must be capable of understanding business requirements, working with stakeholders & implementing complex integrations. Responsibilities: Designing & developing integration solutions using MuleSoft Anypoint Platform. Building & maintaining integration flows using MuleSoft's Anypoint Studio. Creating & implementing custom connectors and modules. Collaborating with other developers & stakeholders to understand business requirements & translate them into integration solutions.
        Required: Mulesoft Technical Lead Location: Remote Duration: 12 month initial contract IR35 Status: Inside Working with the Project Manager, architects, clients & other stakeholders to implement MuleSoft APIs. This role will require knowledge of MuleSoft's Anypoint Studio & Anypoint Platform, which includes Design Center, Runtime Manager, API Manager, Exchange, etc. You must be capable of understanding business requirements, working with stakeholders & implementing complex integrations. Responsibilities: Designing & developing integration solutions using MuleSoft Anypoint Platform. Building & maintaining integration flows using MuleSoft's Anypoint Studio. Creating & implementing custom connectors and modules. Collaborating with other developers & stakeholders to understand business requirements & translate them into integration solutions.
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        NEW

        Senior React Native Developer

        Connexa
        EC1, City of London
        £11000 - £100000 per annum + + Bonus
        Our client, a fast-growing FinTech organisation delivering innovative digital financial solutions, is seeking a highly skilled Senior React Native Developer to join their dynamic technology team. This is a key opportunity to play a leading role in the development and launch of a major new mobile app scheduled for release in September 2025. The successful candidate will have extensive experience in React Native development, combined with a passion for delivering seamless mobile experiences across iOS and Android platforms. * Take ownership of mobile app design, development, and optimisation using React Native. * Drive the delivery of a high-performance, scalable mobile app with outstanding user experience. * Collaborate closely with Product Managers, Designers, Developers, and key stakeholders to deliver business-critical solutions.
        Our client, a fast-growing FinTech organisation delivering innovative digital financial solutions, is seeking a highly skilled Senior React Native Developer to join their dynamic technology team. This is a key opportunity to play a leading role in the development and launch of a major new mobile app scheduled for release in September 2025. The successful candidate will have extensive experience in React Native development, combined with a passion for delivering seamless mobile experiences across iOS and Android platforms. * Take ownership of mobile app design, development, and optimisation using React Native. * Drive the delivery of a high-performance, scalable mobile app with outstanding user experience. * Collaborate closely with Product Managers, Designers, Developers, and key stakeholders to deliver business-critical solutions.
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        NEWFEATURED

        Product Manager - Post Trade

        SG Technology
        EC1A, City of London
        £90,000 per annum Plus Bonus & Benefits
        My client, a leading global investment bank, is seeking an experienced Product Manager to position technology as a strategic asset and to shape how a growing product organisation supports worldwide business growth. Reporting to the Lead Product Manager for Investments, the successful candidate will own the alignment and product development of the banks investment-operations proposition, covering custody, IBOR, ABOR, trade capture, dealing and settlements across multiple asset classes. Working within a long-standing Agile team, the Product Manager will integrate and modernise critical post-trade platforms, delivering innovative, scalable solutions while cultivating a strong partnership between technology and the global business. Key Responsibilities
        My client, a leading global investment bank, is seeking an experienced Product Manager to position technology as a strategic asset and to shape how a growing product organisation supports worldwide business growth. Reporting to the Lead Product Manager for Investments, the successful candidate will own the alignment and product development of the banks investment-operations proposition, covering custody, IBOR, ABOR, trade capture, dealing and settlements across multiple asset classes. Working within a long-standing Agile team, the Product Manager will integrate and modernise critical post-trade platforms, delivering innovative, scalable solutions while cultivating a strong partnership between technology and the global business. Key Responsibilities
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        NEW

        Software Engineer

        Platform Recruitment Limited
        EC1, City of London
        Up to £90,000 per annum
        Title: Software Engineer Company: HPC / AI Location: London (hybrid) Package: Up to £90,000 A next-generation and scientifically-led HPC team have opened up an opportunity for an experienced Software Engineer with C++ and GPU expertise to join a team of exceptionally talented developers. You will have the opportunity to shape the developmental trajectory of the business by working on high-performance greenfield projects. This is a fantastic chance for an experienced C++ engineer with proven experience in a video or high-performance environment to join a world-class team of engineers developing truly novel solutions. * C++ is your strongest language * Ideally experience in Video or Audio Processing * Experience writing performance-critical software * Exposure to GPU technology (Vulkan API, OpenGL, OpenCL, CUDA etc.,) * Relevant degree Full details are available.
        Title: Software Engineer Company: HPC / AI Location: London (hybrid) Package: Up to £90,000 A next-generation and scientifically-led HPC team have opened up an opportunity for an experienced Software Engineer with C++ and GPU expertise to join a team of exceptionally talented developers. You will have the opportunity to shape the developmental trajectory of the business by working on high-performance greenfield projects. This is a fantastic chance for an experienced C++ engineer with proven experience in a video or high-performance environment to join a world-class team of engineers developing truly novel solutions. * C++ is your strongest language * Ideally experience in Video or Audio Processing * Experience writing performance-critical software * Exposure to GPU technology (Vulkan API, OpenGL, OpenCL, CUDA etc.,) * Relevant degree Full details are available.
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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 asustainableeconomy where everyone can prosper. We support a wide range of digital payments choices, making transactionssecure, 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 The Global Open Banking and API team is responsible for developing and building the future of open banking and a developer-first approach that propels innovation with fintech and other partners, in support of realizing Mastercards multi-rail potential.
        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build asustainableeconomy where everyone can prosper. We support a wide range of digital payments choices, making transactionssecure, 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 The Global Open Banking and API team is responsible for developing and building the future of open banking and a developer-first approach that propels innovation with fintech and other partners, in support of realizing Mastercards multi-rail potential.
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        NEW
        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build asustainableeconomy where everyone can prosper. We support a wide range of digital payments choices, making transactionssecure, 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 We work to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible. Using secure data and networks, partnerships, and passion, our innovations and solutions help individuals, financial institutions, governments, and businesses realize their greatest potential.
        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build asustainableeconomy where everyone can prosper. We support a wide range of digital payments choices, making transactionssecure, 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 We work to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible. Using secure data and networks, partnerships, and passion, our innovations and solutions help individuals, financial institutions, governments, and businesses realize their greatest potential.
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        NEW

        Technical Product Manager

        Tech 4
        E1, East London
        £75,000 per annum + excellent benefits
        Highly successful and fast growing organisation has an exciting opportunity for a Technical Product Manager. Are you passionate about technology, customer service, and defining product requirements? They're seeking a Technical Product Manager to join our dynamic Product Team and help them remain at the forefront of the healthcare sector! As their Technical Product Manager, and working closely with content experts, you will be responsible for understanding customer needs, defining product requirements, and working closely with cross-functional teams to deliver high-quality data products and APIs. Your technical expertise and customer-centric approach will be critical in ensuring the success and satisfaction of their customers. * Experience working with APIs, including RESTful APIs, and familiarity with API security measures like OAuth, API keys, and encryption.
        Highly successful and fast growing organisation has an exciting opportunity for a Technical Product Manager. Are you passionate about technology, customer service, and defining product requirements? They're seeking a Technical Product Manager to join our dynamic Product Team and help them remain at the forefront of the healthcare sector! As their Technical Product Manager, and working closely with content experts, you will be responsible for understanding customer needs, defining product requirements, and working closely with cross-functional teams to deliver high-quality data products and APIs. Your technical expertise and customer-centric approach will be critical in ensuring the success and satisfaction of their customers. * Experience working with APIs, including RESTful APIs, and familiarity with API security measures like OAuth, API keys, and encryption.
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        Dynamics CRM Solution Architect

        Norton Blake
        City of London, London
        £100000 - £1000000 per annum
        My client, a leading professional services company are currently looking to bring on a Solution Architect who has some strong experience working within Dynamics CRM. The successful candidate will be tasked with designing and implementing scalable, high-performance systems, with a primary focus on Dynamics 365 but knowledge of other platforms (like Salesforce) would be desirable. The ideal candidate should also possess a comprehensive background in designing and implementing scalable, loosely coupled architectural solutions that support flexibility, maintainability, and rapid evolution of systems. This includes a deep understanding of modular design principles, service-oriented and microservices architectures, and the ability to decouple system components to reduce interdependencies and improve fault tolerance. * Architectural Design.
        My client, a leading professional services company are currently looking to bring on a Solution Architect who has some strong experience working within Dynamics CRM. The successful candidate will be tasked with designing and implementing scalable, high-performance systems, with a primary focus on Dynamics 365 but knowledge of other platforms (like Salesforce) would be desirable. The ideal candidate should also possess a comprehensive background in designing and implementing scalable, loosely coupled architectural solutions that support flexibility, maintainability, and rapid evolution of systems. This includes a deep understanding of modular design principles, service-oriented and microservices architectures, and the ability to decouple system components to reduce interdependencies and improve fault tolerance. * Architectural Design.
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        Global Claims IT Leader

        MARSH CORPORATE SERVICES LIMITED
        The City, EC3R 5BU
        Pension Scheme, Private Health Insurance & life insurance
        Join Our Team as Claims IT Leader at Marsh McLennan We are seeking a talented individual to join our team at Marsh McLennan as Claims IT Leader. This role will be based in London and is a hybrid position, requiring at least one day a week in the office. You will have the responsibility of overseeing current global claims platform roll-outs, ensuring that all deliverables are implemented on time and within budget. This will involve closely monitoring the progress of these roll-outs and taking necessary actions to ensure their successful completion. * Define the claims roadmap, you will regularly review new claims capability requests. This includes evaluating whether existing platforms and solutions are still suitable for their intended purpose. If necessary, you will propose the addition of new technologies to enhance the claims capabilities.
        Join Our Team as Claims IT Leader at Marsh McLennan We are seeking a talented individual to join our team at Marsh McLennan as Claims IT Leader. This role will be based in London and is a hybrid position, requiring at least one day a week in the office. You will have the responsibility of overseeing current global claims platform roll-outs, ensuring that all deliverables are implemented on time and within budget. This will involve closely monitoring the progress of these roll-outs and taking necessary actions to ensure their successful completion. * Define the claims roadmap, you will regularly review new claims capability requests. This includes evaluating whether existing platforms and solutions are still suitable for their intended purpose. If necessary, you will propose the addition of new technologies to enhance the claims capabilities.
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        NEWPREMIUM
        This is an exciting opportunity to join a global leader in fuel storage and distribution that's committed to driving a sustainable, green energy future. You'll join a people-focused business that values inclusion, development, and innovation. We're seeking a Mechanical Engineer with strong experience in piping, tanks, valves, and rotating equipment, ideally within COMAH-regulated environments. You'll act as the technical authority for mechanical systems, ensuring design integrity, regulatory compliance, and equipment optimisation across terminals and pipeline infrastructure. This is a flexible role with regular travel across North West Europe. * Lead on mechanical scope (valves, piping, pumps, rotating machinery). * Ensure engineering design complies with API, EN, EEMUA, ASME standards.
        This is an exciting opportunity to join a global leader in fuel storage and distribution that's committed to driving a sustainable, green energy future. You'll join a people-focused business that values inclusion, development, and innovation. We're seeking a Mechanical Engineer with strong experience in piping, tanks, valves, and rotating equipment, ideally within COMAH-regulated environments. You'll act as the technical authority for mechanical systems, ensuring design integrity, regulatory compliance, and equipment optimisation across terminals and pipeline infrastructure. This is a flexible role with regular travel across North West Europe. * Lead on mechanical scope (valves, piping, pumps, rotating machinery). * Ensure engineering design complies with API, EN, EEMUA, ASME standards.
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        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for overseeing the technical integrations and overall system architecture supporting the Workday platform. Working in thePeople Applicationsdepartment, you willensure seamless operation of integrations, monitor technical performance, and manage the adoption of system releases.
        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for overseeing the technical integrations and overall system architecture supporting the Workday platform. Working in thePeople Applicationsdepartment, you willensure seamless operation of integrations, monitor technical performance, and manage the adoption of system releases.
        more
        NEW
        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for overseeing the technical integrations and overall system architecture supporting the Workday platform. Working in thePeople Applicationsdepartment, you willensure seamless operation of integrations, monitor technical performance, and manage the adoption of system releases.
        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for overseeing the technical integrations and overall system architecture supporting the Workday platform. Working in thePeople Applicationsdepartment, you willensure seamless operation of integrations, monitor technical performance, and manage the adoption of system releases.
        more
        PREMIUM
        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for overseeing the technical integrations and overall system architecture supporting the Workday platform. Working in thePeople Applicationsdepartment, you willensure seamless operation of integrations, monitor technical performance, and manage the adoption of system releases.
        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for overseeing the technical integrations and overall system architecture supporting the Workday platform. Working in thePeople Applicationsdepartment, you willensure seamless operation of integrations, monitor technical performance, and manage the adoption of system releases.
        more
        NEW
        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for overseeing the technical integrations and overall system architecture supporting the Workday platform. Working in thePeople Applicationsdepartment, you willensure seamless operation of integrations, monitor technical performance, and manage the adoption of system releases.
        Company Description At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description Join our team and youll be responsible for overseeing the technical integrations and overall system architecture supporting the Workday platform. Working in thePeople Applicationsdepartment, you willensure seamless operation of integrations, monitor technical performance, and manage the adoption of system releases.
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        Rust Developer

        Tiro Partners
        City of London, London
        £65000 - £80000 per annum + bonus, hybrid working
        Senior Rust Developer (x3) | Permanent | London (2 days/week hybrid) | Iconic Brand in Retail & Hospitality We are working with household name that's leading a digital transformation in the retail and restaurant industry. Looking to hire 3 Mid / Senior Rust Developers to build high-performce, scalable systems that support millions of real-time transactions every day. Location: Hybrid - 2 days per week in our central London HQ Type: Full-time, Permanent Salary: £60,000 - £85,000 per annum + benefits Domain: Retail / Hospitality / Consumer Tech Tech Stack: Rust, Cloud (AWS/GCP), Microservices, Event-driven architecture * Work for a globally recognised consumer brand with a strong tech investment roadmap * Use Rust daily to build real-world systems at scale, in production * Collaborate with experienced engineers in a modern cloud-native, DevOps-led culture
        Senior Rust Developer (x3) | Permanent | London (2 days/week hybrid) | Iconic Brand in Retail & Hospitality We are working with household name that's leading a digital transformation in the retail and restaurant industry. Looking to hire 3 Mid / Senior Rust Developers to build high-performce, scalable systems that support millions of real-time transactions every day. Location: Hybrid - 2 days per week in our central London HQ Type: Full-time, Permanent Salary: £60,000 - £85,000 per annum + benefits Domain: Retail / Hospitality / Consumer Tech Tech Stack: Rust, Cloud (AWS/GCP), Microservices, Event-driven architecture * Work for a globally recognised consumer brand with a strong tech investment roadmap * Use Rust daily to build real-world systems at scale, in production * Collaborate with experienced engineers in a modern cloud-native, DevOps-led culture
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        FEATURED

        .Net Developer - Hybrid Remote

        VERTECH GROUP (UK) LTD
        KT14, West Byfleet
        From £55,000 to £65,000 per annum + Benefits
        .Net Developer Location: Flexible Hybrid Home / Byfleet Salary: Circa 55k 65k + Benefits .Net Developer required by fast-growing, technology-led company! This is a diverse, challenging role in a talented team where youll be responsible for developing a variety of complex projects * At least 3yrs development experience * Skills in C#, VB.Net * ASP.Net, Blazor, WPF * RESTful APIs Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where youll be able to keep up to date with emerging technologies and enjoy a healthy work/life balance! Apply now for FULL details!
        .Net Developer Location: Flexible Hybrid Home / Byfleet Salary: Circa 55k 65k + Benefits .Net Developer required by fast-growing, technology-led company! This is a diverse, challenging role in a talented team where youll be responsible for developing a variety of complex projects * At least 3yrs development experience * Skills in C#, VB.Net * ASP.Net, Blazor, WPF * RESTful APIs Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where youll be able to keep up to date with emerging technologies and enjoy a healthy work/life balance! Apply now for FULL details!
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        FEATURED

        Senior Penetration Tester

        COMPUTACENTER (UK) LIMITED
        SE1, South East London
        Unspecified
        Life on the team Computacenter is growing our penetration testing capability and we are looking for an experienced penetration tester to support the delivery of vulnerability assessment and penetration testing services to Computacenter and our customers delivered services. As a highly skilled and motivated Penetration Tester, you will join our dynamic Cybersecurity team. In this role, you will be responsible for identifying vulnerabilities in systems, applications, and networks through a variety of penetration testing methodologies. Your expertise will play a critical role in strengthening our security posture and safeguarding our valuable assets from cyber threats. We are keen to develop our own people and will look at individuals, you will be involved in so many business projects whilst working with passionate Cyber Security Professionals.
        Life on the team Computacenter is growing our penetration testing capability and we are looking for an experienced penetration tester to support the delivery of vulnerability assessment and penetration testing services to Computacenter and our customers delivered services. As a highly skilled and motivated Penetration Tester, you will join our dynamic Cybersecurity team. In this role, you will be responsible for identifying vulnerabilities in systems, applications, and networks through a variety of penetration testing methodologies. Your expertise will play a critical role in strengthening our security posture and safeguarding our valuable assets from cyber threats. We are keen to develop our own people and will look at individuals, you will be involved in so many business projects whilst working with passionate Cyber Security Professionals.
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        Senior Java Developer

        Develop
        London
        £80000 - £90000 per annum + Bonus, pension
        A brand new Senior Java Developer position is coming up with a well known name in the fintech space, working specifically in their payments team. This is a permanent position with a salary of up to £90k, and will be hybrid with 1 day a week in Central London. I'm looking to speak with Engineers from a solid Java background, who are looking to on a new challenge in a challenging yet rewarding environment. Prior experience of payments is not essential, but will be beneficial. * Java 17+ * Springboot * Microservices * API integration * Docker / Kubernetes * Terraform - desirable * AWS There will be a 2 stage interview process for this position. If interested, please apply with your updated CV asap. Unfortunately no sponsorship will be provided with this position.
        A brand new Senior Java Developer position is coming up with a well known name in the fintech space, working specifically in their payments team. This is a permanent position with a salary of up to £90k, and will be hybrid with 1 day a week in Central London. I'm looking to speak with Engineers from a solid Java background, who are looking to on a new challenge in a challenging yet rewarding environment. Prior experience of payments is not essential, but will be beneficial. * Java 17+ * Springboot * Microservices * API integration * Docker / Kubernetes * Terraform - desirable * AWS There will be a 2 stage interview process for this position. If interested, please apply with your updated CV asap. Unfortunately no sponsorship will be provided with this position.
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        NEW
        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build asustainableeconomy where everyone can prosper. We support a wide range of digital payments choices, making transactionssecure, 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 Mastercard Checkout Services focuses on making payments simpler, more efficient, and more secure. We are building highly scalable digital payment experiences through our products such as Click to Pay, Secure Card on File Tokenization and Token Authentication Service.
        Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build asustainableeconomy where everyone can prosper. We support a wide range of digital payments choices, making transactionssecure, 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 Mastercard Checkout Services focuses on making payments simpler, more efficient, and more secure. We are building highly scalable digital payment experiences through our products such as Click to Pay, Secure Card on File Tokenization and Token Authentication Service.
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        NEW

        Head of Technology & Networks

        Deerfoot Recruitment Solutions
        London
        £65000 - £75000 per annum
        65-75K with benefits A leading European workplace media company is seeking a Head of Technology & Networks to lead its UK technical operations. This is a hands-on leadership role focused on digital infrastructure, CMS management, installations, programmatic advertising support, and vendor coordination. You'll drive technical strategy, lead a high-performing Networks team, and ensure the reliability and innovation of content delivery systems across multiple locations. * Lead digital infrastructure, CMS (e.g. Broadsign), and media hardware operations * Oversee installations, troubleshooting, and vendor partnerships * Support programmatic advertising and system integrations * Improve processes and ensure platform performance and uptime * Collaborate across content, operations, and commercial teams * Strong experience in DOOH, AV, or digital signage tech
        65-75K with benefits A leading European workplace media company is seeking a Head of Technology & Networks to lead its UK technical operations. This is a hands-on leadership role focused on digital infrastructure, CMS management, installations, programmatic advertising support, and vendor coordination. You'll drive technical strategy, lead a high-performing Networks team, and ensure the reliability and innovation of content delivery systems across multiple locations. * Lead digital infrastructure, CMS (e.g. Broadsign), and media hardware operations * Oversee installations, troubleshooting, and vendor partnerships * Support programmatic advertising and system integrations * Improve processes and ensure platform performance and uptime * Collaborate across content, operations, and commercial teams * Strong experience in DOOH, AV, or digital signage tech
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        FEATURED

        Data Architect

        Anson Mccade
        EC1, City of London, EC4M 7JH
        GBP 100,000.00 - 125,000.00 per year;GBP 95,000.00 - 115,000.00 per ye
        £100,000 - 125,000 GBP Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Role: Data Architect Salary: £95,000 - £115,000 DOE Additional Package: 10% Bonus, Extensive Benefits Package Location: London (Hybrid) Are you a Data Architect looking for your next challenge? If you're passionate about building best-in-class data models and shaping enterprise-wide architecture, this could be the role for you. You'll be joining a forward-thinking engineering team working on cutting-edge analytics and streaming solutions. The environment is collaborative, technically ambitious, and offers real scope to lead the future of data architecture. This is a fantastic opportunity for a Data Architect who thrives in technically deep roles and enjoys working with both analytical and real-time data.
        £100,000 - 125,000 GBP Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Role: Data Architect Salary: £95,000 - £115,000 DOE Additional Package: 10% Bonus, Extensive Benefits Package Location: London (Hybrid) Are you a Data Architect looking for your next challenge? If you're passionate about building best-in-class data models and shaping enterprise-wide architecture, this could be the role for you. You'll be joining a forward-thinking engineering team working on cutting-edge analytics and streaming solutions. The environment is collaborative, technically ambitious, and offers real scope to lead the future of data architecture. This is a fantastic opportunity for a Data Architect who thrives in technically deep roles and enjoys working with both analytical and real-time data.
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        PREMIUM
        £90,000 - 115,000 GBP 10% Bonus, Pension, Healthcare Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Location: London (Hybrid) Salary: Up to £115,000 (Depending on experience) We're hiring a Data Architect for a global consultancy with a strong UK presence. This one sits squarely in engineering-not delivery-and is all about deep technical expertise. If you live and breathe data modelling, real-time integrations, and scalable architecture, this is your playground. Why this role? You'll be the go-to for designing and assuring data models across analytical and streaming domains. Think conceptual to physical modelling, real-time pipelines, and shaping the standards that others follow. You'll work closely with engineers, architects, and product teams to make sure data is structured, scalable, and future-proof.
        £90,000 - 115,000 GBP 10% Bonus, Pension, Healthcare Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Location: London (Hybrid) Salary: Up to £115,000 (Depending on experience) We're hiring a Data Architect for a global consultancy with a strong UK presence. This one sits squarely in engineering-not delivery-and is all about deep technical expertise. If you live and breathe data modelling, real-time integrations, and scalable architecture, this is your playground. Why this role? You'll be the go-to for designing and assuring data models across analytical and streaming domains. Think conceptual to physical modelling, real-time pipelines, and shaping the standards that others follow. You'll work closely with engineers, architects, and product teams to make sure data is structured, scalable, and future-proof.
        more
        PREMIUM

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        What is the average salary for API in London?

        Average salary per year
        £72,499

        The average salary for a API in London is £72,499. API in London salaries range from £62,499 to £87,499.

        Frequently Asked Questions

        How many API jobs are there in London?
        There are 560 API jobs within 20 miles of London available on Jobsite right now.

        Where in London are these jobs?
        You can find jobs in City of London, Central London, West End.

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

        How many temporary and part-time API jobs are available in London?
        There are 2 temporary API jobs and 23 part-time API jobs available in London at the moment.