6 api developer jobs found

Job Title: BackEnd Developer Location: Remote Day Rate: £400 per day (Outside ir35) Job Position: Contract We are looking for a strong BackEnd Contractor to help handle production issues. This includes working with the company’s clients and customer success team to identify the source of a technical problem and then fixing those problems. This role covers a lot of technologies, from UI, React, system configuration, Node.js backend code, databases, and AWS hosting. So this is a great opportunity to learn and expand all those skills. The right candidate needs to be able to hit the ground running, a good problem solver, and can prioritise what is important and get it done. Experience needed as a Back End Developer: 5+ years of Node.js development Experience using AI Tools such as Cursor, Claude Code or similar Type Script/React/Strong JavaScript skills REST API development SQL Git

Contract React Native Developer (Outside IR35) Remote | 6–8 Week Initial Project + Ongoing Retainer We’re looking for an experienced React Native Developer to support an established mobile application used across Android and iOS. This is an initial 6–8 week project focused on delivering two key enhancements to an existing production application, with the opportunity for ongoing work (approx. one week per month) for continued development and maintenance. You’ll be joining a mature product environment and working closely with backend engineers and the product team to deliver improvements to a live application. Key Responsibilities Develop and enhance features within an existing React Native mobile application Work across both Android and iOS platforms Collaborate with backend developers to integrate APIs and services Contribute to improvements within a large, production-level codebase Deliver clean, maintainable and...

We are supporting a leading Financial Services client i their search for a Python Developer - the role is fully remote and outside IR35. The role: Strong Python skills and experience building modern REST APIs (mandatory). Proficiency with FastAPI (mandatory) and familiarity with Flask (nice to have). Good understanding of data modelling, databases, and working with ORMs. Experience with async programming and high-performance Back End patterns. Knowledge of modern authentication/authorization (OAuth2, JWT, etc.). Familiarity with caching (eg, Redis) and pub/sub streaming patterns. Ability to write proper, reliable automated tests (pytest or similar).

Role: Expert .NET Developer - Cross Asset Trading System Location: Very Flexible. Can offer Remote with occasional travel to London City offices Contract: 12 months Rate: Up to £750/day (OUTSIDE IR35) About the Role: We are partnering with a leading investment bank on an ambitious programme to modernise and enhance their cross-asset trading systems. This is a technically challenging, hands-on role, ideal for an expert .NET developer with a strong SQL Server background and experience working in financial environments. Please note, you MUST have very strong low level C#, able to work through complex multithreaed performance issues. Good understanding of multi-threading, garbage collection, concurrency, the CLR is very important for this role. You will be joining a highly skilled team focused on performance, reliability, and scalability, tackling complex issues in Real Time, data-driven applications. This is purely a tech-heavy role-business knowledge is helpful but not...

Python / Vue.js Contractor Location: UK Based - 100% Remote Contract Length: 12 Months Rate: £negotiable IR35 Status: Outside IR35 We're looking for an experienced Python / Vue.js Contractor to join a long-term programme of work on a 12-month contract . This role is fully remote and open to UK-based contractors only . You'll be working on the development and enhancement of modern, scalable applications, collaborating with a distributed engineering team on business-critical systems. The Role Develop and maintain backend services using Python Build and enhance user interfaces using Vue.js Collaborate with product owners, designers, and engineers Contribute to clean, scalable, and maintainable code Participate in code reviews and technical discussions Support ongoing development across a long-term programme Required Skills & Experience Strong commercial experience with Python Solid frontend experience with Vue.js Experience...

Python / Vue.js Contractor Location: UK Based - 100% Remote Contract Length: 12 Months Rate: £negotiable IR35 Status: Outside IR35 We're looking for an experienced Python / Vue.js Contractor to join a long-term programme of work on a 12-month contract . This role is fully remote and open to UK-based contractors only . You'll be working on the development and enhancement of modern, scalable applications, collaborating with a distributed engineering team on business-critical systems. The Role Develop and maintain backend services using Python Build and enhance user interfaces using Vue.js Collaborate with product owners, designers, and engineers Contribute to clean, scalable, and maintainable code Participate in code reviews and technical discussions Support ongoing development across a long-term programme Required Skills & Experience Strong commercial experience with Python Solid frontend experience with Vue.js Experience...