Date posted
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Locations
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Date posted
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Job types
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- The City, City (EC3)
- Shoreditch
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9 Contract API jobs in Chelmsford + 20 miles
)
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
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
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.
)
Delphi Developer
Delphi Developer
Octad Recruitment Consultants (Octad Ltd )
Wickford (SS11)
From £50,000 to £70,000 per annum Good Benefits
We are seeking an experienced Delphi / SQL Developerto join our client's growing development team and work on large-scale, business-critical enterprise applications used by global clients. This is a senior technical role focused on maintaining, enhancing, and modernising a complex Delphi-based system with a strong SQL Server backend. If you enjoy solving complex problems, working with mature codebases, and contributing to long-term system stability, this role will suit you perfectly. Key Responsibilities * Maintain, support, and enhance existing Delphi enterprise applications. * Diagnose and resolve complex defects, performance issues, and system bottlenecks. * Work closely with business users to translate requirements into technical solutions. * Produce clear documentation for updates, fixes, and new features. * Participate in sprint planning, estimation, and code reviews.
We are seeking an experienced Delphi / SQL Developerto join our client's growing development team and work on large-scale, business-critical enterprise applications used by global clients. This is a senior technical role focused on maintaining, enhancing, and modernising a complex Delphi-based system with a strong SQL Server backend. If you enjoy solving complex problems, working with mature codebases, and contributing to long-term system stability, this role will suit you perfectly. Key Responsibilities * Maintain, support, and enhance existing Delphi enterprise applications. * Diagnose and resolve complex defects, performance issues, and system bottlenecks. * Work closely with business users to translate requirements into technical solutions. * Produce clear documentation for updates, fixes, and new features. * Participate in sprint planning, estimation, and code reviews.
.NET Developer
.NET Developer
Octad Recruitment Consultants (Octad Ltd )
Wickford (SS11)
From £35,000 to £55,000 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
Collaborate with internal stakeholders and external agencies to identify and map available data sources - through webhooks, API endpoints, and platform integrations - and determine how data can be used to power personalised communications.
Collaborate with internal stakeholders and external agencies to identify and map available data sources - through webhooks, API endpoints, and platform integrations - and determine how data can be used to power personalised communications.
616 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 - £120000 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
)
Workplace Platform Engineer (DocuSign & 365 & API)
Workplace Platform Engineer (DocuSign & 365 & API)
Morson Edge
City of London, London, EC1A 1AA
Market related
We are seeking a Platform Engineer to join the Modern Workplace team at a leading banking client. This team is focused on delivering a flexible, efficient, and seamless digital workplace experience, enabling colleagues to collaborate and perform effectively using enterprise tools such as Microsoft 365 and DocuSign. The successful candidate will be a key contributor to the Productivity Applications portfolio, responsible for configuring, maintaining, and enhancing platforms that support a high-performing digital workplace. Key Responsibilities * Configure, develop, and maintain solutions across the Productivity Applications platform * Contribute to the design and implementation of new digital workplace capabilities * Manage the end-to-end lifecycle of platform solutions, ensuring continuous improvement * Support business-as-usual changes and incremental enhancements
We are seeking a Platform Engineer to join the Modern Workplace team at a leading banking client. This team is focused on delivering a flexible, efficient, and seamless digital workplace experience, enabling colleagues to collaborate and perform effectively using enterprise tools such as Microsoft 365 and DocuSign. The successful candidate will be a key contributor to the Productivity Applications portfolio, responsible for configuring, maintaining, and enhancing platforms that support a high-performing digital workplace. Key Responsibilities * Configure, develop, and maintain solutions across the Productivity Applications platform * Contribute to the design and implementation of new digital workplace capabilities * Manage the end-to-end lifecycle of platform solutions, ensuring continuous improvement * Support business-as-usual changes and incremental enhancements
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.
)
Automation Engineer – Storage & Platform (Python / CI/CD / APIs)
Automation Engineer – Storage & Platform (Python / CI/CD / APIs)
Essential Consulting
South East London (SE1)
Unspecified Competitive Daily Rate - Inside IR35
Engineering API integrations between systems (REST APIs, authentication, error handling, retries, idempotency) * Hands-on experience with API integration and automation
Engineering API integrations between systems (REST APIs, authentication, error handling, retries, idempotency) * Hands-on experience with API integration and automation
)
Senior Developer / Architect
Senior Developer / Architect
Young's Employment Services Ltd
West London (W6)
circ £75,000 - £90,000 + Bens
Azure cloud-native AKS / Container Apps, Service Bus, API Management, Blob Storage, Azure DevOps
Azure cloud-native AKS / Container Apps, Service Bus, API Management, Blob Storage, Azure DevOps
Hands-on experience designing and delivering enterprise integrations using MuleSoft (Anypoint Platform), including API-led connectivity, error handling, and operational monitoring
Hands-on experience designing and delivering enterprise integrations using MuleSoft (Anypoint Platform), including API-led connectivity, error handling, and operational monitoring
)
Contract .Net Developer – Insurance claims system
Contract .Net Developer – Insurance claims system
Hireful
Central London, London
£400 per day outside IR35
We’re looking for a proactive, self-sufficient developer with strong experience in .NET, API development, microservices architecture, and database integration.
We’re looking for a proactive, self-sufficient developer with strong experience in .NET, API development, microservices architecture, and database integration.
FEATURED
)
Good understanding of API-led, integration-centric architectures and data-flow modelling * Experience with API gateways, middleware, or enterprise integration platforms
Good understanding of API-led, integration-centric architectures and data-flow modelling * Experience with API gateways, middleware, or enterprise integration platforms
PREMIUM
)
Lead Solution Architect – Endur (ETRM Gas & Power Trading)
Lead Solution Architect – Endur (ETRM Gas & Power Trading)
BP Energy
St James, South West London (SW1), WC2N 5DU
Competitive
Experience with modern architecture patterns: microservices, messaging/event-driven design, caching, and API strategy.
Experience with modern architecture patterns: microservices, messaging/event-driven design, caching, and API strategy.
)
Designing, building, testing, and deploying integration flows using SAP Integration Suite, with a focus on Cloud Integration (CPI), API Management, and Event Mesh. * Proven experience in designing and deploying integration flows within SAP BTP, especially CPI, API Management, and Event Mesh.
Designing, building, testing, and deploying integration flows using SAP Integration Suite, with a focus on Cloud Integration (CPI), API Management, and Event Mesh. * Proven experience in designing and deploying integration flows within SAP BTP, especially CPI, API Management, and Event Mesh.
FEATURED
)
Publish, configure, and manage APIs within an API Management platform * Oversee the full API lifecycle, ensuring strong governance, performance, and security * Proven experience working with API Management platforms and API lifecycle processes * Experience with Azure API Management or comparable platforms
Publish, configure, and manage APIs within an API Management platform * Oversee the full API lifecycle, ensuring strong governance, performance, and security * Proven experience working with API Management platforms and API lifecycle processes * Experience with Azure API Management or comparable platforms
• Skill in API design and security in API management ecosystem
• Skill in API design and security in API management ecosystem
PREMIUM
Full Stack Engineer - Equity
Full Stack Engineer - Equity
Dental startup
Central London (W1)
Up to £60,000 per annum Equity - Founding Engineer
You'll own the full stack database architecture, API layer, and front-end, and you'll work directly with the founder on every major decision. * Architect and build the core platform from scratch schema, API, and front-end * Strong Node.js REST API development, authentication, middleware * Third-party API and webhook integration experience
You'll own the full stack database architecture, API layer, and front-end, and you'll work directly with the founder on every major decision. * Architect and build the core platform from scratch schema, API, and front-end * Strong Node.js REST API development, authentication, middleware * Third-party API and webhook integration experience
Senior Software Developer
Senior Software Developer
Tech 4
East London (E10)
From £68,000 to £70,000 per annum + excellent benefits
Assist with the design, implementation, and testing of APIs that adhere to the Open API specification
Assist with the design, implementation, and testing of APIs that adhere to the Open API specification
)
API Spec (Swagger OpenAPI)
API Spec (Swagger OpenAPI)
FEATURED
Related Jobs
Locations
- The City, City (EC3)
- Shoreditch
- Moorgate
- St James
- Alconbury
- Camden
- Datchet Common
- Englefield Green
- Euston
- Greenwich
- City of London
- Cambridge
- Central London
- West End
- East London
- South East London
- South West London
- Loughton
- Dartford
- Kingston Upon Thames
- London
- Cambridgeshire
- Essex
- Surrey
- Kent
- Hertfordshire
- Buckinghamshire
- Bedfordshire
- Berkshire
- Suffolk
- South East
- East Anglia