Date posted
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Locations
Locations
Salaries
Date posted
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Locations
- The City, City (EC4)
- Holborn
- Southwark
- The City, City (EC3)
- Euston
- Holloway
- Shoreditch
- Victoria
- Waterloo
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5 Contract API jobs in Brookfields, Cambridge + 20 miles
175 exact matches jobs are outside your preferred location
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Senior C# .NET Developer (Hybrid)
Senior C# .NET Developer (Hybrid)
Get Staffed Online Recruitment
W1B, West London
£68 000 - £72 000 per annum
Senior C# .NET Developer - Mayfair, London - Hybrid (1 - 2 days per week in the office) £68,000 - £72,000 per annum - The Role - Our client is hiring a backend C# .NET Developer to join their engineering team in a hybrid role (1 - 2 days per week in the office). You'll help build and maintain high-performance backend systems that support searching, order processing, and background processes with a strong focus on both application logic and data access. This role is ideal for someone confident in both C#/.NET development and SQL, and who enjoys working on clean, maintainable code and performance-optimised database logic. * Designing and building backend services in C#. * Building secure, well-structured APIs with throttling and versioning. * Developing durable workflows. * Writing efficient and scalable SQL queries, stored procedures, and scripts.
Senior C# .NET Developer - Mayfair, London - Hybrid (1 - 2 days per week in the office) £68,000 - £72,000 per annum - The Role - Our client is hiring a backend C# .NET Developer to join their engineering team in a hybrid role (1 - 2 days per week in the office). You'll help build and maintain high-performance backend systems that support searching, order processing, and background processes with a strong focus on both application logic and data access. This role is ideal for someone confident in both C#/.NET development and SQL, and who enjoys working on clean, maintainable code and performance-optimised database logic. * Designing and building backend services in C#. * Building secure, well-structured APIs with throttling and versioning. * Developing durable workflows. * Writing efficient and scalable SQL queries, stored procedures, and scripts.
LCH Ltd is an international multi-asset class central counterparty clearing house (CCP), part of the London Stock Exchange Group. LCH Ltd serves a broad range of exchanges and over-the-counter trading platforms providing critical risk management services. It has a unique membership model and its customers span the globe and include major financial groups (including the majority of the major investment banks), broker-dealers and specialist commodity houses and a wide range of buy-side and real-money firms including major asset managers and large hedge funds. This role provides an opportunity to work on one of the most critical finance technology functions in the world. The LCH CCP is systematically important to the worlds financial markets which requires technology that has to be very resilient and with strong controls.
LCH Ltd is an international multi-asset class central counterparty clearing house (CCP), part of the London Stock Exchange Group. LCH Ltd serves a broad range of exchanges and over-the-counter trading platforms providing critical risk management services. It has a unique membership model and its customers span the globe and include major financial groups (including the majority of the major investment banks), broker-dealers and specialist commodity houses and a wide range of buy-side and real-money firms including major asset managers and large hedge funds. This role provides an opportunity to work on one of the most critical finance technology functions in the world. The LCH CCP is systematically important to the worlds financial markets which requires technology that has to be very resilient and with strong controls.
Node Developer Remote Working - Lynx are currently working with a large IT consultancy to help them source a Node Developer. Our client is large global Consultancy who work with enterprise clients, solving their business and technology problems using cutting edge Solutions. Design, implement, and manage backend applications and APIs using Node.js - Work with RESTful APIs and external services to enhance system capabilities and connectivity - Perform unit and integration testing, troubleshoot issues, and maintain high code reliability - Collaborating with stakeholders and leadership to understand and refine project requirements - Working on diverse projects and challenges in a consultancy capacity - Advocating for and contributing to best practices in software engineering across teams and projects - Previous experience working within a consulting organisation is essent
Node Developer Remote Working - Lynx are currently working with a large IT consultancy to help them source a Node Developer. Our client is large global Consultancy who work with enterprise clients, solving their business and technology problems using cutting edge Solutions. Design, implement, and manage backend applications and APIs using Node.js - Work with RESTful APIs and external services to enhance system capabilities and connectivity - Perform unit and integration testing, troubleshoot issues, and maintain high code reliability - Collaborating with stakeholders and leadership to understand and refine project requirements - Working on diverse projects and challenges in a consultancy capacity - Advocating for and contributing to best practices in software engineering across teams and projects - Previous experience working within a consulting organisation is essent
Node Developer Remote Working - Lynx are currently working with a large IT consultancy to help them source a Node Developer. Our client is large global Consultancy who work with enterprise clients, solving their business and technology problems using cutting edge Solutions. Design, implement, and manage backend applications and APIs using Node.js - Work with RESTful APIs and external services to enhance system capabilities and connectivity - Perform unit and integration testing, troubleshoot issues, and maintain high code reliability - Collaborating with stakeholders and leadership to understand and refine project requirements - Working on diverse projects and challenges in a consultancy capacity - Advocating for and contributing to best practices in software engineering across teams and projects - Previous experience working within a consulting organisation is essent
Node Developer Remote Working - Lynx are currently working with a large IT consultancy to help them source a Node Developer. Our client is large global Consultancy who work with enterprise clients, solving their business and technology problems using cutting edge Solutions. Design, implement, and manage backend applications and APIs using Node.js - Work with RESTful APIs and external services to enhance system capabilities and connectivity - Perform unit and integration testing, troubleshoot issues, and maintain high code reliability - Collaborating with stakeholders and leadership to understand and refine project requirements - Working on diverse projects and challenges in a consultancy capacity - Advocating for and contributing to best practices in software engineering across teams and projects - Previous experience working within a consulting organisation is essent
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FullStack Developer ( Python / Django ) – PropTech Start-up
FullStack Developer ( Python / Django ) – PropTech Start-up
Run-Time Group Ltd
E1, East London
From £75,000 to £80,000 per annum
Full-Stack Developer (Python/Django) PropTech Start-up - Location:London Area (Shoreditch) Work Model:Hybrid 3 days in office - Job Type:Full-Time - Salary: £70k - £80k - About Us - We are working with a fast-growing Prop-Tech start-up on a mission to revolutionise the property rental market by putting power into the hands of tenants. Backed by investors but already very profitable with a solid client-base, they're building cutting-edge solutions that blend technology with the property sector to create seamless, data-driven experiences. Were looking for aFull-Stack Developer (Python / Django / React)with3-5 years of experienceto join their small team. If you thrive in a fast-paced start-up environment and love building scalable, high-performance applications, wed love to hear from you. Key Responsibilities * Design, develop, and maintain full-stack applications usingP
Full-Stack Developer (Python/Django) PropTech Start-up - Location:London Area (Shoreditch) Work Model:Hybrid 3 days in office - Job Type:Full-Time - Salary: £70k - £80k - About Us - We are working with a fast-growing Prop-Tech start-up on a mission to revolutionise the property rental market by putting power into the hands of tenants. Backed by investors but already very profitable with a solid client-base, they're building cutting-edge solutions that blend technology with the property sector to create seamless, data-driven experiences. Were looking for aFull-Stack Developer (Python / Django / React)with3-5 years of experienceto join their small team. If you thrive in a fast-paced start-up environment and love building scalable, high-performance applications, wed love to hear from you. Key Responsibilities * Design, develop, and maintain full-stack applications usingP
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Front End Developer
Front End Developer
Sanderson Government and Defence
EC1, City of London
£400 - £500 per day + outside IR35
Details - Clearance required: SC Cleared - IR35 Status: Outside IR35 - Start date: 01/12/2025 - Pay rate: 400-500/d - We are forming a new Data Team to deliver a unified, user-friendly interface that consolidates dashboards, reports, and analytical outputs from across the organisation. This 'single pane of glass' will serve as the central hub for stakeholders to explore data, monitor performance, and make informed decisions. As the Front-End Developer, you will play a pivotal role in designing and building this interface from the ground up. You'll work closely with Data Analysts, Data Scientists, Engineers, and Business Analysts to understand their outputs and translate them into intuitive, dynamic visual experiences. Your work will directly influence how data is consumed and acted upon across the organisation. Responsibilities
Details - Clearance required: SC Cleared - IR35 Status: Outside IR35 - Start date: 01/12/2025 - Pay rate: 400-500/d - We are forming a new Data Team to deliver a unified, user-friendly interface that consolidates dashboards, reports, and analytical outputs from across the organisation. This 'single pane of glass' will serve as the central hub for stakeholders to explore data, monitor performance, and make informed decisions. As the Front-End Developer, you will play a pivotal role in designing and building this interface from the ground up. You'll work closely with Data Analysts, Data Scientists, Engineers, and Business Analysts to understand their outputs and translate them into intuitive, dynamic visual experiences. Your work will directly influence how data is consumed and acted upon across the organisation. Responsibilities
FEATURED
Lead Software Developer - Python / AWS / React
Lead Software Developer - Python / AWS / React
Tech 4
E1, East London
From £72,000 to £76,000 per annum + excellent benefits
Experience with AWS services (Lambda, SQS, API gateways, S3).
Experience with AWS services (Lambda, SQS, API gateways, S3).
NEW
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Experience with API management, middleware, data flow platforms?
Experience with API management, middleware, data flow platforms?
NEW
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Manual Security Tester - SC Cleared - Remote - Inside IR35
Manual Security Tester - SC Cleared - Remote - Inside IR35
The Bridge (IT Recruitment) Limited
SE1, South East London, SE1 0AA
£400 - 425 per day
Manual API testing
Manual API testing
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Senior Java Microservices AWS developer
Senior Java Microservices AWS developer
Stott & May Professional Search Limited
London
£460 - £510 per annum
As a Senior Java Microservices AWS Developer, you will be responsible for the design and development of web applications using Java and AWS Serverless Architecture (Lambda, DynamoDB, ECS Fargate, SQS, SNS, Kinesis, CloudWatch, CloudFormation, IAM, CodeBuild, Security Groups, API Gateway, ALBs, KMS, Secrets Manager, Parameter Store, and S3). Proven proficiency in AWS Serverless Architecture (Lambda, DynamoDB, ECS Fargate, SQS, SNS, Kinesis, CloudWatch, CloudFormation, IAM, CodeBuild, Security Groups, API Gateway, ALBs, KMS, Secrets Manager, Parameter Store, and S3).
As a Senior Java Microservices AWS Developer, you will be responsible for the design and development of web applications using Java and AWS Serverless Architecture (Lambda, DynamoDB, ECS Fargate, SQS, SNS, Kinesis, CloudWatch, CloudFormation, IAM, CodeBuild, Security Groups, API Gateway, ALBs, KMS, Secrets Manager, Parameter Store, and S3). Proven proficiency in AWS Serverless Architecture (Lambda, DynamoDB, ECS Fargate, SQS, SNS, Kinesis, CloudWatch, CloudFormation, IAM, CodeBuild, Security Groups, API Gateway, ALBs, KMS, Secrets Manager, Parameter Store, and S3).
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Knowledge of Microsoft licensing, environment strategies, and API limitations.
Knowledge of Microsoft licensing, environment strategies, and API limitations.
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Configure and support Axway solutions, including API management and B2B gateway. * Working knowledge of Axway technologies, particularly API management and B2B gateway.
Configure and support Axway solutions, including API management and B2B gateway. * Working knowledge of Axway technologies, particularly API management and B2B gateway.
FEATURED
Experience in using API testing tools like Postman, Insomnia
Experience in using API testing tools like Postman, Insomnia
FEATURED
Senior Security Engineer Defender PurView Sentinel
Senior Security Engineer Defender PurView Sentinel
Invitise Ltd
EC1A, City of London
Up to £500 per day Outside IR35
PowerShell scripting and use of Microsoft Graph API
PowerShell scripting and use of Microsoft Graph API
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Junior Test Automation Engineer
Junior Test Automation Engineer
Lynx Recruitment Limited
SW1W, South West London
From £35,000 to £50,000 per annum
Hands-on experience with API testing tools such as RestAssured or SoapUI
Hands-on experience with API testing tools such as RestAssured or SoapUI
Test Automation Engineer
Test Automation Engineer
Lynx Recruitment Limited
SW1W, South West London
From £50,000 to £65,000 per annum
Hands-on experience with API testing tools such as RestAssured or SoapUI
Hands-on experience with API testing tools such as RestAssured or SoapUI
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Full Stack Developer Remote
Full Stack Developer Remote
LDNY People Ltd
SE10, South East London
From £40 to £60 per hour negotiable fully remote 5 years work
Experience in REST API Design and Development.
Experience in REST API Design and Development.
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4+ years automation testing skills (Selenium, Katalon, GT-UI, GT-API). * Web services testing / API testing skills is a plus.
4+ years automation testing skills (Selenium, Katalon, GT-UI, GT-API). * Web services testing / API testing skills is a plus.
NEW
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AI (artificial intelligence) DevOps Engineer
AI (artificial intelligence) DevOps Engineer
Huxley Associates
EC1, City of London
£60000 - £90000 per annum
You'll also ensure alignment with enterprise-grade security practices, including zero trust principles, identity-aware routing, and integration with Azure API Management and Application Gateway. * API Gateway, Azure API Management (APIM), Azure Application Gateway
You'll also ensure alignment with enterprise-grade security practices, including zero trust principles, identity-aware routing, and integration with Azure API Management and Application Gateway. * API Gateway, Azure API Management (APIM), Azure Application Gateway
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Proficiency with Git workflows, LAMP stack, and REST API integrations.
Proficiency with Git workflows, LAMP stack, and REST API integrations.
NEWFEATURED
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Most functionality is written by the API or integrations team but we need a strong developer that can do both.
Most functionality is written by the API or integrations team but we need a strong developer that can do both.
NEWFEATURED
You may also be asked to support the testing of releases for our Client API and Mobile Application. * API testing - building out automated test coverage of our RESTful Client API * Collaborate with the external contractor QA resource on specific projects (e.g. automating API testing) and as an additional resource when required
You may also be asked to support the testing of releases for our Client API and Mobile Application. * API testing - building out automated test coverage of our RESTful Client API * Collaborate with the external contractor QA resource on specific projects (e.g. automating API testing) and as an additional resource when required
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Deep understanding of AWS services such as Lambda, DynamoDB, S3, API Gateway and CloudFormation
Deep understanding of AWS services such as Lambda, DynamoDB, S3, API Gateway and CloudFormation
Wallarm is the only solution that unifies best-in-class API Security and WAAP (Next-Gen WAF) capabilities to protect your entire API and web application portfolio in multi-cloud and cloud-native environments. * Recommend API security best practices, application architectures, platforms and application infrastructure required to successfully implement a complete API security solution based on Wallarm - Prior experience in API security, API management, SIEM, Software Development, DevOps, DevSecOps, or web application firewalls is preferred
Wallarm is the only solution that unifies best-in-class API Security and WAAP (Next-Gen WAF) capabilities to protect your entire API and web application portfolio in multi-cloud and cloud-native environments. * Recommend API security best practices, application architectures, platforms and application infrastructure required to successfully implement a complete API security solution based on Wallarm - Prior experience in API security, API management, SIEM, Software Development, DevOps, DevSecOps, or web application firewalls is preferred
NEW
Own end-to-end API and IDoc integration strategy and execution through go-live.
Own end-to-end API and IDoc integration strategy and execution through go-live.
Related Jobs
Locations
- The City, City (EC4)
- Holborn
- Southwark
- The City, City (EC3)
- Euston
- Holloway
- Shoreditch
- Victoria
- Waterloo
- Westminster
- City of London
- Central London
- South West London
- West End
- Cambridge
- South East London
- East London
- Ipswich
- Milton Keynes
- Northampton
- London
- Cambridgeshire
- Suffolk
- Buckinghamshire
- Northamptonshire
- Norfolk
- South East
- East Anglia
- East Midlands
- Midlands