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        Last 14 days
        223

        139 Part Time API jobs in London + 20 miles

        Backend Software Engineer Java Kotlin AWS

        Client Server
        Shoreditch, EC2A 2AP
        £100000 - £120000 per annum
        Backend Software Engineer / Developer (Java Kotlin AWS API) Hybrid WFH to £110k Would you like to progress your career in an impactful hands-on Backend 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 Backend 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.
        Backend Software Engineer / Developer (Java Kotlin AWS API) Hybrid WFH to £110k Would you like to progress your career in an impactful hands-on Backend 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 Backend 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
        Hybrid: Two days in our client's London office and three days working from home. On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. By Wednesday, you could be writing a PHP 8.2 script to automate image processing for a new exhibition launch. Friday afternoon? Testing out an AI tool to help curators search archive materials faster. That’s the reality of life as a Backend Integration Developer here. No two weeks look the same. The mix of backend software development, systems integration, and cloud infrastructure work means you’ll constantly be learning, solving problems, and collaborating with colleagues from across the organisation. This is a fantastic opportunity for a technically adaptable developer to join a nationally respected cultural institution with an ambitious digital vision.
        Hybrid: Two days in our client's London office and three days working from home. On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. By Wednesday, you could be writing a PHP 8.2 script to automate image processing for a new exhibition launch. Friday afternoon? Testing out an AI tool to help curators search archive materials faster. That’s the reality of life as a Backend Integration Developer here. No two weeks look the same. The mix of backend software development, systems integration, and cloud infrastructure work means you’ll constantly be learning, solving problems, and collaborating with colleagues from across the organisation. This is a fantastic opportunity for a technically adaptable developer to join a nationally respected cultural institution with an ambitious digital vision.
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        PREMIUM
        Hybrid: Two days in our client's London office and three days working from home. On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. By Wednesday, you could be writing a PHP 8.2 script to automate image processing for a new exhibition launch. Friday afternoon? Testing out an AI tool to help curators search archive materials faster. That’s the reality of life as a Backend Integration Developer here. No two weeks look the same. The mix of backend software development, systems integration, and cloud infrastructure work means you’ll constantly be learning, solving problems, and collaborating with colleagues from across the organisation. This is a fantastic opportunity for a technically adaptable developer to join a nationally respected cultural institution with an ambitious digital vision.
        Hybrid: Two days in our client's London office and three days working from home. On Monday morning, you might be refining an API connection between a collections database and a public-facing platform. By Wednesday, you could be writing a PHP 8.2 script to automate image processing for a new exhibition launch. Friday afternoon? Testing out an AI tool to help curators search archive materials faster. That’s the reality of life as a Backend Integration Developer here. No two weeks look the same. The mix of backend software development, systems integration, and cloud infrastructure work means you’ll constantly be learning, solving problems, and collaborating with colleagues from across the organisation. This is a fantastic opportunity for a technically adaptable developer to join a nationally respected cultural institution with an ambitious digital vision.
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        NEWFEATURED
        Senior JavaScript Developer / Engineer (Web API Vue.js) London to £100k Do you have expertise with JavaScript combined with an engineering, problem-solving mindset? You could be progressing your career in a senior, hands-on Senior JavaScript Developer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets, the company has been established 10 years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Senior JavaScript Developer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and future proof the business.
        Senior JavaScript Developer / Engineer (Web API Vue.js) London to £100k Do you have expertise with JavaScript combined with an engineering, problem-solving mindset? You could be progressing your career in a senior, hands-on Senior JavaScript Developer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets, the company has been established 10 years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Senior JavaScript Developer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and future proof the business.
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        NEWPREMIUM

        Full Stack Developer

        Understanding Recruitment
        East London, London, E1 6BD
        Remote Working
        Location: Fully Remote I'm partnered with a well known UK charity who are hiring for a full stack developer to join the team. Key skills for this role are knowledge of .Net, C#, Entity Framework, SQL server, API's and a experience in full stack positions and also an approachable manner in order to gather requirements from teams within the business. The Full Stack Developer will be supporting a key organisational project working on an in-house tool allowing partner organisations to work more efficiently. - .Net Core C#, Entity Framework, LINQ, Razor Pages experience - Strong experience with API's and integration - Good communication skills and a self starter .Net / C# / Integration Developer Apply now for immediate consideration regarding this excellent opportunity! Understanding Recruitment is acting as an employment agency for this vacancy
        Location: Fully Remote I'm partnered with a well known UK charity who are hiring for a full stack developer to join the team. Key skills for this role are knowledge of .Net, C#, Entity Framework, SQL server, API's and a experience in full stack positions and also an approachable manner in order to gather requirements from teams within the business. The Full Stack Developer will be supporting a key organisational project working on an in-house tool allowing partner organisations to work more efficiently. - .Net Core C#, Entity Framework, LINQ, Razor Pages experience - Strong experience with API's and integration - Good communication skills and a self starter .Net / C# / Integration Developer Apply now for immediate consideration regarding this excellent opportunity! Understanding Recruitment is acting as an employment agency for this vacancy
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        NEW

        Applications Support Analyst

        Kudos Partners
        Datchet Common, SL3
        £70,000 per annum plus 12% bonus - generous benefits package
        Location:West of London | Hybrid (1 day in office) Salary:Competitive + Benefits + Flexible Working Why Join? * Hybrid working only 1 day per week in the office * Established FinTech company with a collaborative, supportive culture * Key role in supporting high-profile web and mobile applications (including BigCommerce) * Exposure to Azure, APIs, D365, and cutting-edge digital solutions Were seeking anexperienced Applications Support Analystto join our growing FinTech team. Thisbusiness-criticalrole will lead the support for a new digital platform, ensuring smooth operation and exceptional service for internal stakeholders. * Deliver 2nd and 3rd line support for digital applications, resolving issues within SLAs * Minimise downtime and drive continuous improvement across web/mobile platforms
        Location:West of London | Hybrid (1 day in office) Salary:Competitive + Benefits + Flexible Working Why Join? * Hybrid working only 1 day per week in the office * Established FinTech company with a collaborative, supportive culture * Key role in supporting high-profile web and mobile applications (including BigCommerce) * Exposure to Azure, APIs, D365, and cutting-edge digital solutions Were seeking anexperienced Applications Support Analystto join our growing FinTech team. Thisbusiness-criticalrole will lead the support for a new digital platform, ensuring smooth operation and exceptional service for internal stakeholders. * Deliver 2nd and 3rd line support for digital applications, resolving issues within SLAs * Minimise downtime and drive continuous improvement across web/mobile platforms
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        NEW
        WEB DEVELOPER (CUSTOM DASHBOARDS & DATA INTEGRATION) Digimasters Ltd was founded in 2017 as a digital transformation consultancy focused on technology, business process optimisation and data analytics. Digimasters works across all industries and provides experience in organisations of all sizes. Primarily based in London, UK, we work in many regions including the US, EU, APAC and the Middle East. Digimasters takes on additional talent during large programmes of work. For our engagements with clients in Architecture, Engineering, and Construction (AEC), as well as other sectors, we have several roles supporting the delivery of technology, business change, and data programmes. Were looking for a skilled Web Developer to join the Digimasters team, specialising in building custom dashboards and web applications that integrate seamlessly with enterprise data sources.
        WEB DEVELOPER (CUSTOM DASHBOARDS & DATA INTEGRATION) Digimasters Ltd was founded in 2017 as a digital transformation consultancy focused on technology, business process optimisation and data analytics. Digimasters works across all industries and provides experience in organisations of all sizes. Primarily based in London, UK, we work in many regions including the US, EU, APAC and the Middle East. Digimasters takes on additional talent during large programmes of work. For our engagements with clients in Architecture, Engineering, and Construction (AEC), as well as other sectors, we have several roles supporting the delivery of technology, business change, and data programmes. Were looking for a skilled Web Developer to join the Digimasters team, specialising in building custom dashboards and web applications that integrate seamlessly with enterprise data sources.
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        NEW
        6 Month contract 40 hours per week Inside IR35 Hybrid 1 office day London Farringdon office address: 47-53 Charterhouse St, London, EC1M 6PB We are seeking a talented and motivated Frontend Developer with strong expertise in TypeScript to join our growing development team. In this role, you will work on building high-quality, scalable, and responsive web applications using React and TypeScript. You will collaborate closely with cross-functional teams to deliver exceptional user experiences, optimize performance, and contribute to the overall architecture of our platform. Initially it will be a six-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being based in their London office. It is a full-time role, 40 hours per week. * Develop and maintain scalable and responsive web applications using React.js and TypeScript.
        6 Month contract 40 hours per week Inside IR35 Hybrid 1 office day London Farringdon office address: 47-53 Charterhouse St, London, EC1M 6PB We are seeking a talented and motivated Frontend Developer with strong expertise in TypeScript to join our growing development team. In this role, you will work on building high-quality, scalable, and responsive web applications using React and TypeScript. You will collaborate closely with cross-functional teams to deliver exceptional user experiences, optimize performance, and contribute to the overall architecture of our platform. Initially it will be a six-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being based in their London office. It is a full-time role, 40 hours per week. * Develop and maintain scalable and responsive web applications using React.js and TypeScript.
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        NEW

        Data Analyst SQL - Finance

        Client Server
        Tattenham Corner, KT18
        £50000 - £60000 per annum + benefits
        Data Analyst Epsom / WFH to £60k Are you a business focussed Data Analyst with strong commercial acumen? You could be progressing your career at an independent Building Society that specialise in savings and mortgages, within a friendly and supportive team environment. As a Data Analyst you'll work closely with the business to understand data requirements and convey these to the technical team, you'll collaborate with Business Analysts and Product Managers with a focus on projects within finance and treasury initially.
        Data Analyst Epsom / WFH to £60k Are you a business focussed Data Analyst with strong commercial acumen? You could be progressing your career at an independent Building Society that specialise in savings and mortgages, within a friendly and supportive team environment. As a Data Analyst you'll work closely with the business to understand data requirements and convey these to the technical team, you'll collaborate with Business Analysts and Product Managers with a focus on projects within finance and treasury initially.
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        NEWPREMIUM

        Front End Engineer React - Hedge Fund

        Client Server
        Victoria, SW1
        £70000 - £95000 per annum + bonus + benefits
        Front End Engineer / Developer (React v19 TypeScript) London / WFH to £95k Are you a Front End technologist looking for an opportunity to progress your career in a hands-on role with lots of learning opportunities? You could be joining a Hedge Fund with complex work and substantial bonus earning potential. As a Front End Engineer you'll join a globally distributed team to develop engaging and simple user interfaces across all internal business systems. You'll collaborate with UX and Product teams, actively participating in all stages of a project, through product design, development, implementation, testing and maintenance. You'll join colleagues in the impressive Central London office with flexibility to work from home twice a week. * You have strong Front End development skills with React (they're using v19) and TypeScript
        Front End Engineer / Developer (React v19 TypeScript) London / WFH to £95k Are you a Front End technologist looking for an opportunity to progress your career in a hands-on role with lots of learning opportunities? You could be joining a Hedge Fund with complex work and substantial bonus earning potential. As a Front End Engineer you'll join a globally distributed team to develop engaging and simple user interfaces across all internal business systems. You'll collaborate with UX and Product teams, actively participating in all stages of a project, through product design, development, implementation, testing and maintenance. You'll join colleagues in the impressive Central London office with flexibility to work from home twice a week. * You have strong Front End development skills with React (they're using v19) and TypeScript
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        NEWPREMIUM
        Job Role:Senior Full-Stack PHP Developer Working Hours:5 days per week Job Type:Permanent Salary:£70,000 - £85,000 depending on experience Location:London Remote: 4 days remote - 1 day on-site in London office - Postcode NW6 About the Company Our client is a rapidly growing platform that connects individuals with industry professionals for special events. By offering unique opportunities, the platform allows professionals in the field to achieve higher earnings while enjoying enhanced flexibility and a better work-life balance. Role Overview This is an exciting opportunity to join a high-growth, early-stage startup. As a Full-Stack Developer, youll work closely with the founders and engineers in a tight-knit, London-based team. Youll have a direct impact on the companys expansion into new international markets, shaping the future of the business.
        Job Role:Senior Full-Stack PHP Developer Working Hours:5 days per week Job Type:Permanent Salary:£70,000 - £85,000 depending on experience Location:London Remote: 4 days remote - 1 day on-site in London office - Postcode NW6 About the Company Our client is a rapidly growing platform that connects individuals with industry professionals for special events. By offering unique opportunities, the platform allows professionals in the field to achieve higher earnings while enjoying enhanced flexibility and a better work-life balance. Role Overview This is an exciting opportunity to join a high-growth, early-stage startup. As a Full-Stack Developer, youll work closely with the founders and engineers in a tight-knit, London-based team. Youll have a direct impact on the companys expansion into new international markets, shaping the future of the business.
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        NEW

        Senior Salesforce Developer

        167 Solutions Ltd
        SW1, South West London
        From £75,000 to £90,000 per annum
        Senior Salesforce Consultant / Senior Salesforce Developer / Senior Salesforce Programmer Location: Hybrid (London / UK 23 days onsite) Salary: £75,000 - £90,000 Plus Benefits We are hiring on behalf of our client for a Senior Salesforce Consultant to play a key role in an exciting organisation-wide Salesforce transformation. This role offers the opportunity to work across Sales Cloud, Service Cloud, Experience Cloud, and Marketing Cloud in a collaborative hybrid environment. Key Responsibilities * Lead end-to-end delivery across Sales Cloud, Service Cloud, Experience Cloud, and Marketing Cloud, from requirements gathering and solution design to configuration, development, testing, and deployment. * Deliver technical solutions in Salesforce including custom metadata, Lightning components, Apex code, APIs, and declarative automation.
        Senior Salesforce Consultant / Senior Salesforce Developer / Senior Salesforce Programmer Location: Hybrid (London / UK 23 days onsite) Salary: £75,000 - £90,000 Plus Benefits We are hiring on behalf of our client for a Senior Salesforce Consultant to play a key role in an exciting organisation-wide Salesforce transformation. This role offers the opportunity to work across Sales Cloud, Service Cloud, Experience Cloud, and Marketing Cloud in a collaborative hybrid environment. Key Responsibilities * Lead end-to-end delivery across Sales Cloud, Service Cloud, Experience Cloud, and Marketing Cloud, from requirements gathering and solution design to configuration, development, testing, and deployment. * Deliver technical solutions in Salesforce including custom metadata, Lightning components, Apex code, APIs, and declarative automation.
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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.
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        PREMIUM
        6 Month Contract Fully Remote Rate: £520 - £540 per day (Inside IR35) Skills: C#.Net, XML / JSON API's, SC & NPPV3 Clearance We are looking for an experienced Software Engineer to join a high-profile public sector project. You will play a key role in designing, building, and maintaining software solutions in a secure environment, working closely with stakeholders to deliver robust, high-quality applications. This role requires active SC and NPPV3 clearance from day one. This is a fully remote UK based role. Key Responsibilities * Design, develop, and maintain applications using C# and .NET Framework/.NET 6+ * Work with XML/JSON APIs for integration and data exchange * Develop and execute automated tests with MSTest * Collaborate with stakeholders to gather and analyse requirements * Ensure software is secure, scalable, and maintainable Essential Skills
        6 Month Contract Fully Remote Rate: £520 - £540 per day (Inside IR35) Skills: C#.Net, XML / JSON API's, SC & NPPV3 Clearance We are looking for an experienced Software Engineer to join a high-profile public sector project. You will play a key role in designing, building, and maintaining software solutions in a secure environment, working closely with stakeholders to deliver robust, high-quality applications. This role requires active SC and NPPV3 clearance from day one. This is a fully remote UK based role. Key Responsibilities * Design, develop, and maintain applications using C# and .NET Framework/.NET 6+ * Work with XML/JSON APIs for integration and data exchange * Develop and execute automated tests with MSTest * Collaborate with stakeholders to gather and analyse requirements * Ensure software is secure, scalable, and maintainable Essential Skills
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        Senior Software Developer

        Tech 4
        E10, East London
        From £64,000 to £70,000 per annum + excellent benefits
        Highly successful and fast growing organisation has an exciting opportunity for a Senior Software Developer (PYTHON/AWS/REACT). They are looking for a talented individual who will design, implement, and maintain their publishing software, systems, and customer-facing digital products. Requirements * Design and implement systems and software to meet requirements using appropriate tools and methods. * Promote the creation of high-quality code by commitment to practices such as test-driven development, pair programming and code review. * Be responsible for the technical development of all stages of software creation, including testing; ensure that implementation meets security, performance, and safety requirements. * Suggest improvements to the code base, development processes, tooling and working practices.
        Highly successful and fast growing organisation has an exciting opportunity for a Senior Software Developer (PYTHON/AWS/REACT). They are looking for a talented individual who will design, implement, and maintain their publishing software, systems, and customer-facing digital products. Requirements * Design and implement systems and software to meet requirements using appropriate tools and methods. * Promote the creation of high-quality code by commitment to practices such as test-driven development, pair programming and code review. * Be responsible for the technical development of all stages of software creation, including testing; ensure that implementation meets security, performance, and safety requirements. * Suggest improvements to the code base, development processes, tooling and working practices.
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        Senior Full Stack Engineer

        Searchworks Ltd
        Shoreditch, E1
        From £70,000 to £80,000 per annum
        Our client is a fast-growing and well-funded proptech companyon a mission to simplify the stressful process of selling your home. Backed by top-tier investors and operating at the heart of the property market, theyre building a platform that brings clarity, insight, and ease to one of lifes most complex transactions. Theyre looking for aFull Stack Developerwho thrives in ambiguity, loves shipping impactful products, and wants to help shape the future of property tech. If you enjoy solving problems across both frontend and backend, and want to work in a product-first, user-focused environment, this could be the role for you. Employment Type: Full-Time Level:MidSenior (Full Stack Engineer) Industry:Property Technology Functions:Full Stack Development | Product Engineering | Software Delivery * Proven experience withJavaScript/Node.jsin a full stack role
        Our client is a fast-growing and well-funded proptech companyon a mission to simplify the stressful process of selling your home. Backed by top-tier investors and operating at the heart of the property market, theyre building a platform that brings clarity, insight, and ease to one of lifes most complex transactions. Theyre looking for aFull Stack Developerwho thrives in ambiguity, loves shipping impactful products, and wants to help shape the future of property tech. If you enjoy solving problems across both frontend and backend, and want to work in a product-first, user-focused environment, this could be the role for you. Employment Type: Full-Time Level:MidSenior (Full Stack Engineer) Industry:Property Technology Functions:Full Stack Development | Product Engineering | Software Delivery * Proven experience withJavaScript/Node.jsin a full stack role
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        Lead Java Developer

        Halian Technology Limited
        London
        From £82,400 to £92,400 per annum
        One of the UKs most iconic omni-channel retailers is looking for aLead Java Developerto join their expanding digital engineering function. This position requires deep expertise in Kotlin or modern Java, strong architectural understanding of microservices, and a passion for technical leadership and mentoring. Experience working within ecommerce, mobile, or customer-facing digital platforms is highly desirable. This role is a remote position. Youll have the opportunity to work across a modern engineering environment, collaborate with agile product teams, and contribute to a high-traffic platform used by millions of customers. Design, build, and maintain scalable, high-performance services using Kotlin or Java Provide technical leadership and mentoring to other engineers in the team Contribute to solution architecture and strategic technical direction
        One of the UKs most iconic omni-channel retailers is looking for aLead Java Developerto join their expanding digital engineering function. This position requires deep expertise in Kotlin or modern Java, strong architectural understanding of microservices, and a passion for technical leadership and mentoring. Experience working within ecommerce, mobile, or customer-facing digital platforms is highly desirable. This role is a remote position. Youll have the opportunity to work across a modern engineering environment, collaborate with agile product teams, and contribute to a high-traffic platform used by millions of customers. Design, build, and maintain scalable, high-performance services using Kotlin or Java Provide technical leadership and mentoring to other engineers in the team Contribute to solution architecture and strategic technical direction
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        NEW
        London - Hybrid (1x day per month) Salary: Up to £120k DOE + Benefits About Us Our client is a Insurtech Unicorn looking to expand their engineering team. With the opportunity to work on existing products which have generated millions in revenue to something new changing the landscape of the insurance world, this is the perfect opportunity for a results driven and growth focused Senior engineer looking to start an ambitious business. The Role We're seeking a Lead Backend Engineer to drive the architecture, development, and scaling of cloud-native microservices using Python-especially FastAPI. You'll lead a cross-functional team building resilient backend systems that support millions of users, with a direct impact on product and business outcomes.
        London - Hybrid (1x day per month) Salary: Up to £120k DOE + Benefits About Us Our client is a Insurtech Unicorn looking to expand their engineering team. With the opportunity to work on existing products which have generated millions in revenue to something new changing the landscape of the insurance world, this is the perfect opportunity for a results driven and growth focused Senior engineer looking to start an ambitious business. The Role We're seeking a Lead Backend Engineer to drive the architecture, development, and scaling of cloud-native microservices using Python-especially FastAPI. You'll lead a cross-functional team building resilient backend systems that support millions of users, with a direct impact on product and business outcomes.
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        Senior Backend Engineer London - Hybrid (1x day a month) Salary: Up to £95k DOE About Us Our client is a Insurtech Unicorn looking to expand their engineering team. With the opportunity to work on existing products which have generated millions in revenue to something new changing the landscape of the insurance world, this is the perfect opportunity for a results driven and growth focused Senior engineer looking to start an ambitious business. The Role We're looking for a Backend Engineer with strong Python skills and experience building scalable cloud-based microservices, ideally with FastAPI. You'll work in a cross-functional team delivering reliable, performant services that power our core insurance platform. What You'll Do * Design, build, and maintain Python microservices (FastAPI) in production * Own features end-to-end: design, build, test, deploy, monitor
        Senior Backend Engineer London - Hybrid (1x day a month) Salary: Up to £95k DOE About Us Our client is a Insurtech Unicorn looking to expand their engineering team. With the opportunity to work on existing products which have generated millions in revenue to something new changing the landscape of the insurance world, this is the perfect opportunity for a results driven and growth focused Senior engineer looking to start an ambitious business. The Role We're looking for a Backend Engineer with strong Python skills and experience building scalable cloud-based microservices, ideally with FastAPI. You'll work in a cross-functional team delivering reliable, performant services that power our core insurance platform. What You'll Do * Design, build, and maintain Python microservices (FastAPI) in production * Own features end-to-end: design, build, test, deploy, monitor
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        London (Hybrid 1x Per week) Salary: Up to £100k + Benefits About Us Our client is a Insurtech Unicorn looking to expand their engineering team. With the opportunity to work on existing products which have generated millions in revenue to something new changing the landscape of the insurance world, this is the perfect opportunity for a results driven and growth focussed Senior engineer looking to start an ambitious business. The Role We're seeking a Lead Fullstack Engineer to own the frontend architecture and elevate the B2C user experience across our digital products. This is a high-impact role requiring technical vision, hands-on expertise, and leadership to drive innovation in a rapidly evolving environment. As part of a cross-functional, agile team, you will shape the frontend roadmap, champion best practices, and foster a culture of engineering excellence.
        London (Hybrid 1x Per week) Salary: Up to £100k + Benefits About Us Our client is a Insurtech Unicorn looking to expand their engineering team. With the opportunity to work on existing products which have generated millions in revenue to something new changing the landscape of the insurance world, this is the perfect opportunity for a results driven and growth focussed Senior engineer looking to start an ambitious business. The Role We're seeking a Lead Fullstack Engineer to own the frontend architecture and elevate the B2C user experience across our digital products. This is a high-impact role requiring technical vision, hands-on expertise, and leadership to drive innovation in a rapidly evolving environment. As part of a cross-functional, agile team, you will shape the frontend roadmap, champion best practices, and foster a culture of engineering excellence.
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        Junior Presales Engineer, UK (German & English)

        Optibus Transportation Limited
        The City, EC2M 5TQ
        From £39,000 to £45,000 per annum Salary displays OTE, which is 80% &
        Optibusis a unified software platform revolutionizing public transportation planning, scheduling, and operations in over 7,000 cities worldwide. Using AI, ML, and optimization algorithms, it empowers agencies to design more efficient, equitable, and sustainable transit networks, enhancing passenger access, reducing emissions, and improving driver conditions. With offices globally and a team of 350+ employees, Optibus fosters a collaborative culture centered on innovation, determination, and impact. As the first unicorn in public transportation technology, Optibus is driving the modernization of mass transit to make it the preferred choice for cities and passengers alike. We are looking for a Junior Presales Engineer to join our global Revenue team!
        Optibusis a unified software platform revolutionizing public transportation planning, scheduling, and operations in over 7,000 cities worldwide. Using AI, ML, and optimization algorithms, it empowers agencies to design more efficient, equitable, and sustainable transit networks, enhancing passenger access, reducing emissions, and improving driver conditions. With offices globally and a team of 350+ employees, Optibus fosters a collaborative culture centered on innovation, determination, and impact. As the first unicorn in public transportation technology, Optibus is driving the modernization of mass transit to make it the preferred choice for cities and passengers alike. We are looking for a Junior Presales Engineer to join our global Revenue team!
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        NEW
        Senior Backend Engineer London - Hybrid (1x day a week) Salary: Up to £80k DOE About Us Our client is a Insurtech Unicorn looking to expand their engineering team. With the opportunity to work on existing products which have generated millions in revenue to something new changing the landscape of the insurance world, this is the perfect opportunity for a results driven and growth focused Senior engineer looking to start an ambitious business. The Role We're looking for a Backend Engineer with strong Python skills and experience building scalable cloud-based microservices, ideally with FastAPI. You'll work in a cross-functional team delivering reliable, performant services that power our core insurance platform. What You'll Do * Design, build, and maintain Python microservices (FastAPI) in production * Own features end-to-end: design, build, test, deploy, monitor
        Senior Backend Engineer London - Hybrid (1x day a week) Salary: Up to £80k DOE About Us Our client is a Insurtech Unicorn looking to expand their engineering team. With the opportunity to work on existing products which have generated millions in revenue to something new changing the landscape of the insurance world, this is the perfect opportunity for a results driven and growth focused Senior engineer looking to start an ambitious business. The Role We're looking for a Backend Engineer with strong Python skills and experience building scalable cloud-based microservices, ideally with FastAPI. You'll work in a cross-functional team delivering reliable, performant services that power our core insurance platform. What You'll Do * Design, build, and maintain Python microservices (FastAPI) in production * Own features end-to-end: design, build, test, deploy, monitor
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        Role: ServiceNow Developer Salary/Rate: £600-700 Location: hybrid multiple locations available Contract Duration: 12 months We are currently looking for a ServiceNow Developer for our government client. This ServiceNow Developer role is hybrid, based between 2 days per week on site and the remainder of the week working remotely. Office locations include most major towns, with London being a preference. The contract for the ServiceNow Developer position is for 12-months with potential to extend, operating inside IR35. Security Clearance: Security Check ('SC Clearance') This role is inside IR35 - Due to the service of the role, it will now be based on an Umbrella solution. * Proficiency in JavaScript: Core scripting language used in ServiceNow. * Experience with ServiceNow platform: Including modules like ITSM, ITOM, HRSD, CSM, and CMDB.
        Role: ServiceNow Developer Salary/Rate: £600-700 Location: hybrid multiple locations available Contract Duration: 12 months We are currently looking for a ServiceNow Developer for our government client. This ServiceNow Developer role is hybrid, based between 2 days per week on site and the remainder of the week working remotely. Office locations include most major towns, with London being a preference. The contract for the ServiceNow Developer position is for 12-months with potential to extend, operating inside IR35. Security Clearance: Security Check ('SC Clearance') This role is inside IR35 - Due to the service of the role, it will now be based on an Umbrella solution. * Proficiency in JavaScript: Core scripting language used in ServiceNow. * Experience with ServiceNow platform: Including modules like ITSM, ITOM, HRSD, CSM, and CMDB.
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        Job Title: Solutions Architect – CRM Job Type- Permanent Location: London (remote/Hybrid) Industry- Real Estate Consultancy Salary- up to £90K p/a Our client, a leading real estate consultancy is undergoing a major transformation to enhance their delivery of innovative solutions and services. They are looking for a skilled Solutions Architect to lead the design and delivery of scalable, high-performance CRM systems, primarily using Microsoft Dynamics 365 (experience with platforms like Salesforce is also valued). This role sits within the Chief Technology Office and supports fast, iterative delivery across value streams. You'll work closely with Product Owners, Business Analysts, and Engineering teams to ensure solutions are resilient, scalable, and aligned with business and technical goals.
        Job Title: Solutions Architect – CRM Job Type- Permanent Location: London (remote/Hybrid) Industry- Real Estate Consultancy Salary- up to £90K p/a Our client, a leading real estate consultancy is undergoing a major transformation to enhance their delivery of innovative solutions and services. They are looking for a skilled Solutions Architect to lead the design and delivery of scalable, high-performance CRM systems, primarily using Microsoft Dynamics 365 (experience with platforms like Salesforce is also valued). This role sits within the Chief Technology Office and supports fast, iterative delivery across value streams. You'll work closely with Product Owners, Business Analysts, and Engineering teams to ensure solutions are resilient, scalable, and aligned with business and technical goals.
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        Job Title: Principal Software Engineer (Cloud Applications) Location: Hybrid / Remote (Hemel Hempstead) Salary: £100,000 per annum Job Type: Full Time, Permanent Eckoh is a market leader of Customer Engagement Security Solutions, supporting an international client base from our offices in the U.S. and the U.K. Eckoh is owned by Bridgepoint one of the world's leading private asset growth investors, with over $75 billion of assets under management. Our mission is to set the standard for secure interactions between consumers and the world's leading brands. Our innovative products build trust and deliver value through exceptional experiences. What do we do? Eckoh's Customer Engagement Security Solutions help our clients to take payments and transact securely with their customers through all engagement channels.
        Job Title: Principal Software Engineer (Cloud Applications) Location: Hybrid / Remote (Hemel Hempstead) Salary: £100,000 per annum Job Type: Full Time, Permanent Eckoh is a market leader of Customer Engagement Security Solutions, supporting an international client base from our offices in the U.S. and the U.K. Eckoh is owned by Bridgepoint one of the world's leading private asset growth investors, with over $75 billion of assets under management. Our mission is to set the standard for secure interactions between consumers and the world's leading brands. Our innovative products build trust and deliver value through exceptional experiences. What do we do? Eckoh's Customer Engagement Security Solutions help our clients to take payments and transact securely with their customers through all engagement channels.
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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 part time API jobs are there in London?
        There are 139 part time API jobs within 20 miles of London available on Jobsite right now.

        Where in London are these part time jobs?
        You can find part time jobs in South East London, City of London, Central London.

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