Date posted
Commute time
Locations
Type of Company
Job types
Salaries
Locations
Locations
Salaries
Date posted
Type of Company
Job types
Locations
- The City, City (EC4)
- Southwark
- Piccadilly
- Shoreditch
- The City, City (EC3)
- Shadwell
- Camden
- Covent Garden
- Drybridge Hill
- Dublin
- City of London
- Cambridge
- Central London
- West End
- South East London
- East London
- Loughton
- South West London
- West London
- North London
- London
- Cambridgeshire
- Essex
- Hertfordshire
- Suffolk
- Kent
- Surrey
- Bedfordshire
- Buckinghamshire
- South East
- East Anglia
13 Permanent API jobs in Chelmsford + 20 miles
Knowledge of development using the Microsoft Graph API enhancing interconnectivity across applications.
Knowledge of development using the Microsoft Graph API enhancing interconnectivity across applications.
Knowledge of development using the Microsoft Graph API enhancing interconnectivity across applications.
Knowledge of development using the Microsoft Graph API enhancing interconnectivity across applications.
)
Software Automation QA
Software Automation QA
Profile 29
Loughton (IG10), IG10
From £50,000 to £60,000 per annum + benefits (see advert)
Conduct comprehensive testing of various API's used by affiliates and other third-party service providers
Conduct comprehensive testing of various API's used by affiliates and other third-party service providers
Software Automation QA
Software Automation QA
Profile 29
Loughton (IG10), IG10
From £50,000 to £60,000 per annum + benefits (see advert)
Conduct comprehensive testing of various API's used by affiliates and other third-party service providers
Conduct comprehensive testing of various API's used by affiliates and other third-party service providers
Software Automation QA
Software Automation QA
Profile 29
Loughton (IG10), IG10
From £50,000 to £60,000 per annum + benefits (see advert)
Conduct comprehensive testing of various API's used by affiliates and other third-party service providers
Conduct comprehensive testing of various API's used by affiliates and other third-party service providers
Senior Full Stack Web Developer
Senior Full Stack Web Developer
Profile 29
Loughton (IG10), IG10
From £80,000 to £100,000 per annum + benefits (see advert)
As a member of their team, you will have the opportunity to work on their public-facing API and back-office websites in a Test-Driven Agile environment.
As a member of their team, you will have the opportunity to work on their public-facing API and back-office websites in a Test-Driven Agile environment.
Software Automation QA
Software Automation QA
Profile 29
Loughton (IG10), IG10
From £50,000 to £60,000 per annum + benefits (see advert)
Conduct comprehensive testing of various API's used by affiliates and other third-party service providers
Conduct comprehensive testing of various API's used by affiliates and other third-party service providers
)
.NET Developer
.NET Developer
Octad Recruitment Consultants (Octad Ltd )
Wickford (SS11)
From £35,000 to £60,000 per annum Good Benefits
Were looking for a talented .NET Windows Developerto help build, modernise, and support business-critical Windows applications for this fantastic Software Consultancy. If you enjoy C#, SQL Server, system integrations, and transforming legacy code into clean, modern.NET solutions, this is a great opportunity to make a real impact. Work with:C#, .NET / .NET Core, WinForms/WPF, SQL Server, REST APIs, Azure Ideal for:Developers who love problem-solving, clean architecture, and delivering production-ready software. If youre ready to take on meaningful technical challenges in a supportive, forward-thinking team, wed love to hear from you if you have 3 years commercial experience. This role is hybrid with Monday and Wednesday in the office
Were looking for a talented .NET Windows Developerto help build, modernise, and support business-critical Windows applications for this fantastic Software Consultancy. If you enjoy C#, SQL Server, system integrations, and transforming legacy code into clean, modern.NET solutions, this is a great opportunity to make a real impact. Work with:C#, .NET / .NET Core, WinForms/WPF, SQL Server, REST APIs, Azure Ideal for:Developers who love problem-solving, clean architecture, and delivering production-ready software. If youre ready to take on meaningful technical challenges in a supportive, forward-thinking team, wed love to hear from you if you have 3 years commercial experience. This role is hybrid with Monday and Wednesday in the office
)
Junior Software Engineer
Junior Software Engineer
Platform Recruitment Limited
Loughton (IG10)
From £40,000 to £50,000 per annum
Job Title:Junior Software Engineer - Location:North London - Salary:up to £50,000 - This is a superb opportunity for a graduate or junior engineer looking to land their dream job. Its a rare chance to join a team working on groundbreaking robotic automation systems,a true crossroads between robotics, software, and hardware - If youre genuinely passionate about robotics and want to build your career alongside a talented, ambitious team, wed love to hear from you. The Role - Youll play a key role by joining the team early in its growth, working closely with the two founding engineers. Youll have the opportunity to expand your skill set by building backend services in C# and .NET, gaining exposure to REST APIs and NoSQL databases, and working at the intersection of software and hardware integration - Requirements * C#/is your main language * Exposure to ASP.NET
Job Title:Junior Software Engineer - Location:North London - Salary:up to £50,000 - This is a superb opportunity for a graduate or junior engineer looking to land their dream job. Its a rare chance to join a team working on groundbreaking robotic automation systems,a true crossroads between robotics, software, and hardware - If youre genuinely passionate about robotics and want to build your career alongside a talented, ambitious team, wed love to hear from you. The Role - Youll play a key role by joining the team early in its growth, working closely with the two founding engineers. Youll have the opportunity to expand your skill set by building backend services in C# and .NET, gaining exposure to REST APIs and NoSQL databases, and working at the intersection of software and hardware integration - Requirements * C#/is your main language * Exposure to ASP.NET
Our client, a prominent player in the Defence & Security sector, is currently looking for an Applications Support Engineer to join their dynamic team based in Harlow (Hybrid). This position is a Fixed Term Contract for 12 months, offering full-time hours of 37 hours per week. The successful applicant must be SC eligible. The Applications Support Engineer will become part of the wider Data and BI Product Family, initially focusing on technical deployment and application support for a major financial planning transformation. This role involves a close working relationship with programme teams and Digital Technology functions such as Architecture, Security, and Operations. Strong technical troubleshooting skills and hands-on experience with financial planning platforms are essential. * Support the initial deployment, configuration, and technical validation of the new ...
Our client, a prominent player in the Defence & Security sector, is currently looking for an Applications Support Engineer to join their dynamic team based in Harlow (Hybrid). This position is a Fixed Term Contract for 12 months, offering full-time hours of 37 hours per week. The successful applicant must be SC eligible. The Applications Support Engineer will become part of the wider Data and BI Product Family, initially focusing on technical deployment and application support for a major financial planning transformation. This role involves a close working relationship with programme teams and Digital Technology functions such as Architecture, Security, and Operations. Strong technical troubleshooting skills and hands-on experience with financial planning platforms are essential. * Support the initial deployment, configuration, and technical validation of the new ...
Web Integration Analyst
Web Integration Analyst
BENEFACT GROUP PLC T/A ECCLESIASTICAL INSURANCE GROUP PLC
South Ockendon, Essex
£30,000 - £35,000 a year
Understanding of web applications, back-office systems, and third-party API integration.
Understanding of web applications, back-office systems, and third-party API integration.
Web Developer
Web Developer
BENEFACT GROUP PLC T/A ECCLESIASTICAL INSURANCE GROUP PLC
South Ockendon, Essex
£30,000 - £35,000 a year
Understanding of web applications, back-office systems, and third-party API integration.
Understanding of web applications, back-office systems, and third-party API integration.
Application Support Engineer - 12 months' Fixed Term Contract
Application Support Engineer - 12 months' Fixed Term Contract
RTX Technologies
Harlow, London
Competitive
2026-03-10 - United Kingdom - Harlow, Essex - Hybrid - Job Title: Application Support Engineer - Grade: P3 - Function: DT - Location: Harlow (Hybrid) Clearance: SC Eligible - Duration: Fixed Term Contract 12 months - Hours: Full Time 37 hours per week - Raytheon UK - At Raytheon UK, we take immense pride in being a leader in defence and aerospace technology. As an employer, we are dedicated to fuelling innovation, nurturing talent, and fostering a culture of excellence. Joining our team means being part of an organisation that shapes the future of national security whilst investing in your growth and personal development. We provide a collaborative environment, abundant opportunities for professional development, and a profound sense of purpose in what we do. Together, we are not just advancing technology; we're building a community committed to safeguarding a safer and more connected world.
2026-03-10 - United Kingdom - Harlow, Essex - Hybrid - Job Title: Application Support Engineer - Grade: P3 - Function: DT - Location: Harlow (Hybrid) Clearance: SC Eligible - Duration: Fixed Term Contract 12 months - Hours: Full Time 37 hours per week - Raytheon UK - At Raytheon UK, we take immense pride in being a leader in defence and aerospace technology. As an employer, we are dedicated to fuelling innovation, nurturing talent, and fostering a culture of excellence. Joining our team means being part of an organisation that shapes the future of national security whilst investing in your growth and personal development. We provide a collaborative environment, abundant opportunities for professional development, and a profound sense of purpose in what we do. Together, we are not just advancing technology; we're building a community committed to safeguarding a safer and more connected world.
332 exact matches jobs are outside your preferred location
)
Technical Product Manager API SaaS
Technical Product Manager API SaaS
Client Server
Shoreditch, East London (E1), EC2A
£95000 - £130000 per annum + benefits
You'll be embedded within delivery teams, UX and engineering and utilise your knowledge of software development to make trade-offs, steward the delivery process and close the gaps in requirements including producing technical documentation along with wireframes and API scaffolding where appropriate. Apply now to find out more about this Technical Product Manager (API SaaS) opportunity.
You'll be embedded within delivery teams, UX and engineering and utilise your knowledge of software development to make trade-offs, steward the delivery process and close the gaps in requirements including producing technical documentation along with wireframes and API scaffolding where appropriate. Apply now to find out more about this Technical Product Manager (API SaaS) opportunity.
PREMIUM
Software Engineer / Developer (Java Kafka API) London / WFH to £90k
Software Engineer / Developer (Java Kafka API) London / WFH to £90k
PREMIUM
)
Solution Architect
Solution Architect
I3 Resourcing Limited
The City, City of London (EC3), EC3V 3ND
£100000 - £120000 per annum + + bonus + benefits
Experience with API-led, microservices, and integration architectures
Experience with API-led, microservices, and integration architectures
)
This is an excellent opportunity for a senior engineer with strong scripting and API skills who wants to design intelligent solutions, streamline operations, and help create reusable automation packages that can later be rolled out to customers. * Designing and implementing automation workflows using Python, REST API integrations, Microsoft Graph API, Power Automate, JavaScript, and PowerShell. * Working on API-driven solutions and integrations with emerging technologies, including links into OpenAI and other modern automation capabilities. * Strong practical understanding of API integrations and how to connect multiple systems in a secure, stable way. * Working knowledge of Microsoft Graph API, Power Automate, JavaScript and/or PowerShell.
This is an excellent opportunity for a senior engineer with strong scripting and API skills who wants to design intelligent solutions, streamline operations, and help create reusable automation packages that can later be rolled out to customers. * Designing and implementing automation workflows using Python, REST API integrations, Microsoft Graph API, Power Automate, JavaScript, and PowerShell. * Working on API-driven solutions and integrations with emerging technologies, including links into OpenAI and other modern automation capabilities. * Strong practical understanding of API integrations and how to connect multiple systems in a secure, stable way. * Working knowledge of Microsoft Graph API, Power Automate, JavaScript and/or PowerShell.
FDE, Forward Deployed Engineer, TypeScript, Node.JS, API's, FinTech, London, Terraform
FDE, Forward Deployed Engineer, TypeScript, Node.JS, API's, FinTech, London, Terraform
Forward Deployed Engineer - Remote - InsureTech
Forward Deployed Engineer - Remote - InsureTech
Transparent Technology
London
£110000 - £150000 per annum + + bens + shares
Senior Forward Deployed Engineer | Python, JavaScript, SQL, APIs, System Design | £110k-£150k + Equity | Fully Remote (UK) Build and deliver AI-powered systems directly into enterprise environments. This is a rare opportunity to join a well-funded, high-growth AI company building an AI-native platform transforming how enterprise workflows are delivered at scale. With strong global backing and rapid expansion across the UK, Europe, and beyond, they are redefining how complex, data-driven decisions are made in real-world environments. As a Senior Forward Deployed Engineer, you'll operate at the intersection of software engineering, system design, and customer delivery, working directly with enterprise clients to implement, configure, and extend a production-grade AI platform. This is not a pure backend role, you'll be a key technical partner, translating complex ...
Senior Forward Deployed Engineer | Python, JavaScript, SQL, APIs, System Design | £110k-£150k + Equity | Fully Remote (UK) Build and deliver AI-powered systems directly into enterprise environments. This is a rare opportunity to join a well-funded, high-growth AI company building an AI-native platform transforming how enterprise workflows are delivered at scale. With strong global backing and rapid expansion across the UK, Europe, and beyond, they are redefining how complex, data-driven decisions are made in real-world environments. As a Senior Forward Deployed Engineer, you'll operate at the intersection of software engineering, system design, and customer delivery, working directly with enterprise clients to implement, configure, and extend a production-grade AI platform. This is not a pure backend role, you'll be a key technical partner, translating complex ...
)
Senior Full Stack Engineer
Senior Full Stack Engineer
RSMB
Covent Garden, Central London (WC2), WC2B
Up to £85k, based on experience
RSMB is seeking an experienced and highly capable Senior Full Stack Engineer to play a central role in the design, development, and evolution of our expanding product suite, including Barb Ads Hub, NMO XCM, and our Data Fusion platform. You will join the team based in London (Hybrid – 2 days per week in the office). Youwill join us on a full-time, permanent basis, and in return, you will receive a competitive salary of up to £85,000 per annum, based on experience. RSMB is a leading company specialising in media measurement solutions. We work with a wide range of clients delivering both long-term contracts like Barb (UK TV audience measurement) and RAJAR (Radio audience measurement), and ad hoc projects. We are proud that we have been a Barb TV audience measurement contractor since 1989 and a RAJAR contractor since 2007.
RSMB is seeking an experienced and highly capable Senior Full Stack Engineer to play a central role in the design, development, and evolution of our expanding product suite, including Barb Ads Hub, NMO XCM, and our Data Fusion platform. You will join the team based in London (Hybrid – 2 days per week in the office). Youwill join us on a full-time, permanent basis, and in return, you will receive a competitive salary of up to £85,000 per annum, based on experience. RSMB is a leading company specialising in media measurement solutions. We work with a wide range of clients delivering both long-term contracts like Barb (UK TV audience measurement) and RAJAR (Radio audience measurement), and ad hoc projects. We are proud that we have been a Barb TV audience measurement contractor since 1989 and a RAJAR contractor since 2007.
PREMIUM
Python AI Engineer - PropTech - London (onsite)
Python AI Engineer - PropTech - London (onsite)
Transparent Technology
London
£71000 - £130000 per annum + bens + equity
Lead Python Engineer | AI, Python, FastAPI, Django, Microservices, APIs, Cloud | London | up to £130k + Equity - Build AI-powered systems that automate real-world workflows at scale. This is an opportunity to join a fast-growing AI startup building an AI-driven platform automating up to 80% of property management workflows, transforming how compliance, maintenance, and tenant communication are handled across the UK property sector. As a Lead Python Engineer, you'll design and build scalable backend systems, APIs, and AI-driven applications, working at the intersection of software engineering, automation, and AI integration. You'll play a key role in developing systems that directly impact end users, while helping shape engineering practices and mentoring other developers in a high-growth environment.
Lead Python Engineer | AI, Python, FastAPI, Django, Microservices, APIs, Cloud | London | up to £130k + Equity - Build AI-powered systems that automate real-world workflows at scale. This is an opportunity to join a fast-growing AI startup building an AI-driven platform automating up to 80% of property management workflows, transforming how compliance, maintenance, and tenant communication are handled across the UK property sector. As a Lead Python Engineer, you'll design and build scalable backend systems, APIs, and AI-driven applications, working at the intersection of software engineering, automation, and AI integration. You'll play a key role in developing systems that directly impact end users, while helping shape engineering practices and mentoring other developers in a high-growth environment.
)
Graduate Software Engineer
Graduate Software Engineer
RedTech Recruitment Ltd
Cambridge (CB22)
£35,000 – £40,000 per annum + benefits
A fantastic opportunity for a Graduate Software Engineer to join a highly innovative, research-driven technology start-up working on complex, cutting-edge systems. This organisation is building advanced platforms at the intersection of AI, algorithms, and next-generation software, and is looking for high-calibre graduates to join their growing engineering team. You will gain exposure across the full stack, working closely with experienced engineers and researchers in a deeply technical environment. Location: Cambridge on-site 5 days a week - Salary: £35,000 £40,000 per annum + benefits * Minimum of a 2.1 degree from a leading university in Computer Science or a closely related subject * Minimum of AAB at A Level or equivalent qualifications * Strong academic background, ideally from universities such as Bristol, Warwick, Manchester, Cambridge or similar
A fantastic opportunity for a Graduate Software Engineer to join a highly innovative, research-driven technology start-up working on complex, cutting-edge systems. This organisation is building advanced platforms at the intersection of AI, algorithms, and next-generation software, and is looking for high-calibre graduates to join their growing engineering team. You will gain exposure across the full stack, working closely with experienced engineers and researchers in a deeply technical environment. Location: Cambridge on-site 5 days a week - Salary: £35,000 £40,000 per annum + benefits * Minimum of a 2.1 degree from a leading university in Computer Science or a closely related subject * Minimum of AAB at A Level or equivalent qualifications * Strong academic background, ideally from universities such as Bristol, Warwick, Manchester, Cambridge or similar
Mid to Senior Front-End Developer
Mid to Senior Front-End Developer
RedTech Recruitment Ltd
Cambridge (CB22)
Up to £70,000 per annum + benefits
A fantastic opportunity for a Mid to Senior Front-End Developer to join a highly innovative, research-driven technology start-up working on cutting-edge systems. This organisation is building advanced platforms at the intersection of AI, complex algorithms, and next-generation software systems. With strong funding secured and ambitious growth plans, they are looking to bring on an experienced Front-End Developer to take ownership of user-facing applications and help shape the future of their product suite. Location: Cambridge on-site 5 days a week - Salary: Up to £70,000 per annum + benefits * Strong commercial experience in front-end development using either React or Angular * Proven ability to take front-end applications from early prototype through to production deployment * Solid understanding of modern front-end architecture, state management, and tooling
A fantastic opportunity for a Mid to Senior Front-End Developer to join a highly innovative, research-driven technology start-up working on cutting-edge systems. This organisation is building advanced platforms at the intersection of AI, complex algorithms, and next-generation software systems. With strong funding secured and ambitious growth plans, they are looking to bring on an experienced Front-End Developer to take ownership of user-facing applications and help shape the future of their product suite. Location: Cambridge on-site 5 days a week - Salary: Up to £70,000 per annum + benefits * Strong commercial experience in front-end development using either React or Angular * Proven ability to take front-end applications from early prototype through to production deployment * Solid understanding of modern front-end architecture, state management, and tooling
)
Senior Product Engineer, Full Stack - Energy
Senior Product Engineer, Full Stack - Energy
MFK Recruitment Ltd
Piccadilly, Central London (W1), W1S 4NS
From £70,000 to £95,000 per annum
£70,000 to £95,000 - Permanent - London, hybrid - The opportunity - Our client is hiring a Senior Product Engineer, Full Stack, to help build the next generation of customer-facing software in the energy market. Operating in a complex, high-value sector, the business is combining technology, data, and product thinking to modernise an area of the energy industry that has historically been underserved by great software. We have already placed 3 people into the business and are pleased to be supporting them again on this important hire. This is a genuinely exciting opportunity for a frontend-strong engineer who wants real ownership, autonomy, and the chance to build products from scratch. They are looking for someone with strong React and TypeScript capability, alongside solid backend exposure across Python, APIs, and databases.
£70,000 to £95,000 - Permanent - London, hybrid - The opportunity - Our client is hiring a Senior Product Engineer, Full Stack, to help build the next generation of customer-facing software in the energy market. Operating in a complex, high-value sector, the business is combining technology, data, and product thinking to modernise an area of the energy industry that has historically been underserved by great software. We have already placed 3 people into the business and are pleased to be supporting them again on this important hire. This is a genuinely exciting opportunity for a frontend-strong engineer who wants real ownership, autonomy, and the chance to build products from scratch. They are looking for someone with strong React and TypeScript capability, alongside solid backend exposure across Python, APIs, and databases.
Graduate AI Analyst (People Operations)
Graduate AI Analyst (People Operations)
RedTech Recruitment Ltd
Newham, Cambridge (CB2), CB2 3BZ
£35,000 – £45,000 per annum + excellent benefits
A fantastic opportunity for a Graduate AI Analyst (People Operations) to join a cutting-edge deep-tech company based in Cambridge. This organisation is undergoing rapid growth and is now looking to transform its internal operations through AI, automation, and smarter systems. This is a unique opportunity for a highly bright, technically-minded graduate who is equally confident, engaging, and people-focused. You will be joining the People team, so this role requires someone who can build strong relationships across the business, communicate complex ideas clearly, and bring an approachable, proactive energy to every interaction. Alongside this, you will have the autonomy to research, implement, and optimise AI tools and processes, with clear scope for the role to evolve into a broader AI-focused position as the company builds out its internal capabilities.
A fantastic opportunity for a Graduate AI Analyst (People Operations) to join a cutting-edge deep-tech company based in Cambridge. This organisation is undergoing rapid growth and is now looking to transform its internal operations through AI, automation, and smarter systems. This is a unique opportunity for a highly bright, technically-minded graduate who is equally confident, engaging, and people-focused. You will be joining the People team, so this role requires someone who can build strong relationships across the business, communicate complex ideas clearly, and bring an approachable, proactive energy to every interaction. Alongside this, you will have the autonomy to research, implement, and optimise AI tools and processes, with clear scope for the role to evolve into a broader AI-focused position as the company builds out its internal capabilities.
Related Jobs
Locations
- The City, City (EC4)
- Southwark
- Piccadilly
- Shoreditch
- The City, City (EC3)
- Shadwell
- Camden
- Covent Garden
- Drybridge Hill
- Dublin
- City of London
- Cambridge
- Central London
- West End
- South East London
- East London
- Loughton
- South West London
- West London
- North London
- London
- Cambridgeshire
- Essex
- Hertfordshire
- Suffolk
- Kent
- Surrey
- Bedfordshire
- Buckinghamshire
- South East
- East Anglia