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Locations
Locations
Salaries
Date posted
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5 Permanent API jobs in Chelmsford + 20 miles
354 exact matches jobs are outside your preferred location
AWS experience (Lambda, SNS, S3, EKS, API Gateway) * Bonus points for: DBT, Airflow, Atlan, Iceberg, CI/CD, API modelling
AWS experience (Lambda, SNS, S3, EKS, API Gateway) * Bonus points for: DBT, Airflow, Atlan, Iceberg, CI/CD, API modelling
PREMIUM
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Strong expertise in API integration, data modelling, ingestion, and activation
Strong expertise in API integration, data modelling, ingestion, and activation
NEW
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Cloud-savvy - Strong background in AWS, ideally with hands-on experience in serverless technologies like Lambda, API Gateway, DynamoDB, and AppSync.
Cloud-savvy - Strong background in AWS, ideally with hands-on experience in serverless technologies like Lambda, API Gateway, DynamoDB, and AppSync.
FEATURED
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Automation Lead (Power Automate)
Automation Lead (Power Automate)
Robert Half
EC1, City of London
£55000 - £65000 per annum + Bonus & Benefits
Integrate data sources including Microsoft Graph API, Dataverse, and SQL * Hands-on experience with Graph API, Dataverse, and SQL
Integrate data sources including Microsoft Graph API, Dataverse, and SQL * Hands-on experience with Graph API, Dataverse, and SQL
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API Development:Experience building data-centric APIs, especially withFastAPIon serverless platforms likeGoogle App Engine.
API Development:Experience building data-centric APIs, especially withFastAPIon serverless platforms likeGoogle App Engine.
Backend & Data Proficiency: Skilled in Python, Node.js, PostgreSQL, MongoDB, and API security. * Security & Compliance: Strong understanding of GDPR, API authentication, and observability.
Backend & Data Proficiency: Skilled in Python, Node.js, PostgreSQL, MongoDB, and API security. * Security & Compliance: Strong understanding of GDPR, API authentication, and observability.
NEW
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Software Developer-MS-Stack
Software Developer-MS-Stack
Solus Accident Repair Centres
North London, London
GBP £35,000.00/Yr. - GBP £50,000.00/Yr.
Work across a wide range of technologies, across web, mobile apps, API, backend, and databases which are currently hosted within Azure.
Work across a wide range of technologies, across web, mobile apps, API, backend, and databases which are currently hosted within Azure.
NEW
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Conduct comprehensive penetration tests: Execute internal and external network penetration tests, web application penetration tests, mobile application penetration tests, API penetration tests, cloud security assessments, and social engineering simulations.
Conduct comprehensive penetration tests: Execute internal and external network penetration tests, web application penetration tests, mobile application penetration tests, API penetration tests, cloud security assessments, and social engineering simulations.
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Senior Data Engineer
Senior Data Engineer
I3 Resourcing Limited
The City, EC3V 3ND
£70000 - £80000 per annum + + EXCELLENT BONUS + BENEFITS
Extensive experience in AWS services, e.g. EC2, S3, RDS, DynamoDB, Redshift, Lambda, API Gateway
Extensive experience in AWS services, e.g. EC2, S3, RDS, DynamoDB, Redshift, Lambda, API Gateway
Software Developer (Microsoft Stack)
Software Developer (Microsoft Stack)
Solus Accident Repair Centres
North London, London
GBP £35,000.00/Yr. - GBP £50,000.00/Yr.
Work across a wide range of technologies, across web, mobile apps, API, backend, and databases which are currently hosted within Azure.
Work across a wide range of technologies, across web, mobile apps, API, backend, and databases which are currently hosted within Azure.
NEW
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Create clear, concise and verifiable technical documentation, such as technical notes, API documents and integration guides.
Create clear, concise and verifiable technical documentation, such as technical notes, API documents and integration guides.
Implement and maintain API integrations
Implement and maintain API integrations
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Technical Agile Business Analyst/ Product Engineer
Technical Agile Business Analyst/ Product Engineer
Hays
London, EC3A 4BF
£50000.0 - £60000.0 per annum + 50000-60000
Proficient with tools such as JIRA, Confluence, Figma and an API documentation platform
Proficient with tools such as JIRA, Confluence, Figma and an API documentation platform
NEW
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Global Claims IT Leader
Global Claims IT Leader
MARSH CORPORATE SERVICES LIMITED
The City, EC3R 5BU
Pension Scheme, Private Health Insurance & life insurance
Being a cross-functional collaborator interfacing with MMC Enterprise Technology partners, Marsh-Operations, and Transformation Office will come naturally to you building a new set of reusable IT Microservices connected via a well-defined API structure.
Being a cross-functional collaborator interfacing with MMC Enterprise Technology partners, Marsh-Operations, and Transformation Office will come naturally to you building a new set of reusable IT Microservices connected via a well-defined API structure.
NEWPREMIUM
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Take a lead role in the development and support ofMicrosoft MVC and .NET web applications and C# Console and API solutions, ensuring best practices are followed throughout the software lifecycle. * Proficient in.NET (C#), JavaScript, Web API, SQL Server, and working knowledge ofHTML, CSS, XML, JSON.
Take a lead role in the development and support ofMicrosoft MVC and .NET web applications and C# Console and API solutions, ensuring best practices are followed throughout the software lifecycle. * Proficient in.NET (C#), JavaScript, Web API, SQL Server, and working knowledge ofHTML, CSS, XML, JSON.
NEW
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Build and work with modern API and microservices architectures
Build and work with modern API and microservices architectures
NEWEQUALITY BOOST
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Build and work with modern API and microservices architectures
Build and work with modern API and microservices architectures
PREMIUM
Implementation (Integration) Consultant
Implementation (Integration) Consultant
Robert Half
London
£70000 - £80000 per annum + Bonus & Benefits
Configure and test API connectivity for seamless data transmission between clients and the platform * Strong knowledge of REST APIs and API integration * Familiarity with AWS and API connectivity in cloud environments
Configure and test API connectivity for seamless data transmission between clients and the platform * Strong knowledge of REST APIs and API integration * Familiarity with AWS and API connectivity in cloud environments
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Senior Digital Developer (Vue/React, .Net Core, Azure)
Senior Digital Developer (Vue/React, .Net Core, Azure)
Stott & May Professional Search Limited
London
£70000 - £80000 per annum + Benefits
Strong experience in API design and development, including RESTful APIs and OpenAPI/Swagger standards, using tools like Postman for testing and documentation.
Strong experience in API design and development, including RESTful APIs and OpenAPI/Swagger standards, using tools like Postman for testing and documentation.
NEW
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Senior Digital Developer (Vue/React, .Net Core, Azure)
Senior Digital Developer (Vue/React, .Net Core, Azure)
Stott & May
London
£70000 - £80000 per annum + Benefits
Strong experience in API design and development, including RESTful APIs and OpenAPI/Swagger standards, using tools like Postman for testing and documentation.
Strong experience in API design and development, including RESTful APIs and OpenAPI/Swagger standards, using tools like Postman for testing and documentation.
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Good understanding of API integration and data flow between front-end and back-end.
Good understanding of API integration and data flow between front-end and back-end.
NEW
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Principal Software Engineer (Cloud Applications)
Principal Software Engineer (Cloud Applications)
Eckoh PLC
HP1, Hemel Hempstead
Up to £100000 per annum
Build cloud-native applications using AWS services such as Lambda, API Gateway, DynamoDB, SQS, and EventBridge * Solid experience with AWS application services (Lambda, API Gateway, Step Functions, DynamoDB, etc.) * Proven ability to design and build modern, API-driven systems in a scalable resilient cloud-based platform * Experience with modern front-end frameworks and API integration (React, Vue, Angular)
Build cloud-native applications using AWS services such as Lambda, API Gateway, DynamoDB, SQS, and EventBridge * Solid experience with AWS application services (Lambda, API Gateway, Step Functions, DynamoDB, etc.) * Proven ability to design and build modern, API-driven systems in a scalable resilient cloud-based platform * Experience with modern front-end frameworks and API integration (React, Vue, Angular)
NEW
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Lead Data Architect
Lead Data Architect
Anson Mccade
WC1, Central London, W C1R
GBP 75,000.00 - 83,000.00 per year;GBP 67,000.00 per year;GBP 76,000.0
£75,000 - 83,000 GBP - Hybrid WORKING - Location: Central London, Greater London - United Kingdom Type: Permanent - Locations: Leeds, Manchester, Birmingham, Bristol, Glasgow, or London (Hybrid - up to 2 days on-site per week, remainder remote) Salary: £67,000 - £76,000 (non-London) / Up to £83,000 (London) + Benefits - A respected digital consultancy is hiring a Lead Data Architect to join its growing Data Engineering practice. Known for delivering modern, human-centred services across public and private sectors, this organisation supports clients through meaningful transformation by combining data, design, and engineering. This role is ideal for experienced architects who enjoy shaping cloud-native data platforms, working in multidisciplinary teams, and embedding data governance and architectural rigour across complex service ecosystems.
£75,000 - 83,000 GBP - Hybrid WORKING - Location: Central London, Greater London - United Kingdom Type: Permanent - Locations: Leeds, Manchester, Birmingham, Bristol, Glasgow, or London (Hybrid - up to 2 days on-site per week, remainder remote) Salary: £67,000 - £76,000 (non-London) / Up to £83,000 (London) + Benefits - A respected digital consultancy is hiring a Lead Data Architect to join its growing Data Engineering practice. Known for delivering modern, human-centred services across public and private sectors, this organisation supports clients through meaningful transformation by combining data, design, and engineering. This role is ideal for experienced architects who enjoy shaping cloud-native data platforms, working in multidisciplinary teams, and embedding data governance and architectural rigour across complex service ecosystems.
PREMIUM
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Job Title: .Net Software Engineer - Location: Hybrid - 1 - 2 days per month in London - Salary: £65K + Bonus + Excellent Benefits - Why Apply? This is an excellent opportunity for a passionate and experienced Software Engineer to make a meaningful impact in a fast-growing, technology-led company based in central London. You'll contribute to high-quality software solutions within a collaborative environment that values creativity, performance, and continuous improvement. Software Engineer Responsibilities * Design and deliver scalable, maintainable, and robust software solutions aligned with engineering best practices * Collaborate closely with your team and stakeholders to solve complex technical problems * Review code and provide constructive feedback to support clean, efficient, and reliable software delivery
Job Title: .Net Software Engineer - Location: Hybrid - 1 - 2 days per month in London - Salary: £65K + Bonus + Excellent Benefits - Why Apply? This is an excellent opportunity for a passionate and experienced Software Engineer to make a meaningful impact in a fast-growing, technology-led company based in central London. You'll contribute to high-quality software solutions within a collaborative environment that values creativity, performance, and continuous improvement. Software Engineer Responsibilities * Design and deliver scalable, maintainable, and robust software solutions aligned with engineering best practices * Collaborate closely with your team and stakeholders to solve complex technical problems * Review code and provide constructive feedback to support clean, efficient, and reliable software delivery
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Senior Software Developer
Senior Software Developer
Lean People Services Limited
Luton, Bedfordshire
From £75,000 to £85,000 per annum
up to £85,000 per annum - Full Time Mon-Fri - Our Client provide remote diagnostic solutions and services to the automotive industry. They offer cutting-edge, expert diagnostics using both after-market and original equipment manufacturer tools to provide safe and accurate repairs. The company was founded in 2010 and is headquartered in Plano, TX with UK offices in Peterlee and Bedfordshire. As more automotive software technologies emerge, including autonomous driving, advanced diagnostics, vehicle connectivity, digital cockpits the Company aims to gain a first-mover advantage by developing software solutions with the help of automotive software engineers. If the idea of making an impact on a project lifecycle sounds appealing from its inception down to testing and deployment appeals to you, keep on reading!
up to £85,000 per annum - Full Time Mon-Fri - Our Client provide remote diagnostic solutions and services to the automotive industry. They offer cutting-edge, expert diagnostics using both after-market and original equipment manufacturer tools to provide safe and accurate repairs. The company was founded in 2010 and is headquartered in Plano, TX with UK offices in Peterlee and Bedfordshire. As more automotive software technologies emerge, including autonomous driving, advanced diagnostics, vehicle connectivity, digital cockpits the Company aims to gain a first-mover advantage by developing software solutions with the help of automotive software engineers. If the idea of making an impact on a project lifecycle sounds appealing from its inception down to testing and deployment appeals to you, keep on reading!