Date posted
Commute time
Locations
Type of Company
Job types
Salaries
Locations
Locations
Salaries
Date posted
Type of Company
Job types
Locations
82 API jobs in The City, City of London + 20 miles
418 exact matches jobs are outside your preferred location
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Data Engineer - Defence - Hybrid - Stevenage or Bolton
Data Engineer - Defence - Hybrid - Stevenage or Bolton
Anson Mccade
SG1, Stevenage
From £45,000 to £55,000 per annum
Experience with ETL, API, ESL or similar
Experience with ETL, API, ESL or similar
PREMIUM
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Software Developer - Active SC, Python, AWS
Software Developer - Active SC, Python, AWS
Hays
London
£400.0 - £425.0 per day + up to £425 per day (InsideIR35)
Proven experience as a software developer with data integration experience (API)
Proven experience as a software developer with data integration experience (API)
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Experience working with REST and GraphQL API's
Experience working with REST and GraphQL API's
FEATURED
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Python Backend Developer - AWS
Python Backend Developer - AWS
Infoplus Technologies UK Ltd
London
From £300 to £350 per day Max GBP 350/day Inside IR35
GraphQL, API authentication, performance management, and internationalization
GraphQL, API authentication, performance management, and internationalization
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Develop and optimise ETL pipelines, data workflows and API integrations
Develop and optimise ETL pipelines, data workflows and API integrations
Senior Laravel Full Stack PHP Developer
Senior Laravel Full Stack PHP Developer
Anonymous Recruiter
RH2, Reigate
From £60,000 to £85,000 per annum Based on experience
Experience in API integrations, database optimisation, and server-side security
Experience in API integrations, database optimisation, and server-side security
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AI Solutions Engineer - London
AI Solutions Engineer - London
Transparent Technology
London, EC1A 4RN
£70000 - £140000 per annum + + bens + shares
Especially integration with the OpenAI API GPT, Gemini, LLama, Claude etc.
Especially integration with the OpenAI API GPT, Gemini, LLama, Claude etc.
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Strong experience with RESTful API development in microservice environments
Strong experience with RESTful API development in microservice environments
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Proficiency in JavaScript, Glide API, and ServiceNow development tools.
Proficiency in JavaScript, Glide API, and ServiceNow development tools.
Strong expertise in API integration, data modelling, ingestion, and activation
Strong expertise in API integration, data modelling, ingestion, and activation
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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
D365 Finance Senior Integration Developer (remote)
D365 Finance Senior Integration Developer (remote)
Hays
London
£500.0 - £550.0 per day + c£510 per day (inside IR35)
We are currently seeking a D365 Senior Integration Developer (finance) to design and implement integrations using D365 API's (e.g. Data Management Package, REST API, OData) You will develop automation processes for data transformation, upload, import and error handling in batch or near real-time modes. Proficiency in tools like Postman, Azure Logic Apps, and scripting (e.g., C#, PowerShell) for API orchestration, along with ETL processes.
We are currently seeking a D365 Senior Integration Developer (finance) to design and implement integrations using D365 API's (e.g. Data Management Package, REST API, OData) You will develop automation processes for data transformation, upload, import and error handling in batch or near real-time modes. Proficiency in tools like Postman, Azure Logic Apps, and scripting (e.g., C#, PowerShell) for API orchestration, along with ETL processes.
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Expert-level knowledge of IAM, network security, encryption, API and application security, container security, and SIEM strategies.
Expert-level knowledge of IAM, network security, encryption, API and application security, container security, and SIEM strategies.
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Excellent development skills, with a depth of experience including C#, Java (Spring Boot, JPA/Hibernate), REST API's, observability and monitoring, queue technologies and security.
Excellent development skills, with a depth of experience including C#, Java (Spring Boot, JPA/Hibernate), REST API's, observability and monitoring, queue technologies and security.
PREMIUM
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API authentication (OAuth 2.0, Azure AD).
API authentication (OAuth 2.0, Azure AD).
NEWFEATURED
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.
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Lead integration of data from SAP (e.g., S/4HANA, BW/4HANA) and external platforms using cloud and API technologies.
Lead integration of data from SAP (e.g., S/4HANA, BW/4HANA) and external platforms using cloud and API technologies.
NEW
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Systems Integration & API Work
Systems Integration & API Work
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Loan IQ Technical Consultant - inside IR35
Loan IQ Technical Consultant - inside IR35
LA International Computer Consultants Ltd
London
£800 - £850 per day
oKnowledge of event management frameworks and API integrations.
oKnowledge of event management frameworks and 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
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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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Are you a hands-on Lead or Senior .Net Developer ready to shape architecture and guide talented developers? Want a hybrid role with 3 days WFH? This is your chance to stay close to the code while making key technical decisions that drive real business impact. You'll join a collaborative, forward-thinking team building cutting-edge products — with the support, tools, and flexibility to thrive. Role: Lead Software Developer, Senior .Net Developer, Software Engineering Manager, Senior Full Stack Developer, Lead .Net Developer, Lead Software Engineer, Senior C# Developer - Salary: £65k - £75k base + Bonus - Benefits: 5% pension, 25 days holiday, 2 wellbeing days, Christmas shutdown, private healthcare, life assurance, cinema tickets & more - Location: Milton Keynes – Hybrid (2 days a week in office) If you’ve got strong .Net (C#) experience and skills in GitHub, APIs, Pos
Are you a hands-on Lead or Senior .Net Developer ready to shape architecture and guide talented developers? Want a hybrid role with 3 days WFH? This is your chance to stay close to the code while making key technical decisions that drive real business impact. You'll join a collaborative, forward-thinking team building cutting-edge products — with the support, tools, and flexibility to thrive. Role: Lead Software Developer, Senior .Net Developer, Software Engineering Manager, Senior Full Stack Developer, Lead .Net Developer, Lead Software Engineer, Senior C# Developer - Salary: £65k - £75k base + Bonus - Benefits: 5% pension, 25 days holiday, 2 wellbeing days, Christmas shutdown, private healthcare, life assurance, cinema tickets & more - Location: Milton Keynes – Hybrid (2 days a week in office) If you’ve got strong .Net (C#) experience and skills in GitHub, APIs, Pos
NEWFEATURED
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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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API Integration Experience:Proven track record of consuming and building APIs for data exchange * Strong understanding of API development and integration (REST, GraphQL)
API Integration Experience:Proven track record of consuming and building APIs for data exchange * Strong understanding of API development and integration (REST, GraphQL)
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