1 to 25 of 49 Backend Developer Jobs in London

Senior Python Backend Developer - Python, AWS, Django Central London/Hybrid -one day in the office £75-85k + benefits Were seeking a topflight Senior Python Backend Developer with a strong software engineering background including 8-9+ years majoring in writing Backend applications using Python and Django (Rest Framework). This is a … seriously weighty, complex, technically challenging role; the successful Backend Developer will be 'red hot' on the core backend skill requirements. Demonstrably the 'go to' person in your role. The Python Backend Developer will be joining a team of 45 at a world-class healthcare scaleup. With each integration of a new hospital group there is … Proactively respond to analytics to ensure our products are robust and meet users needs Take technical ownership of areas of product Required: 8-9+ years of experience writing Backend applications using Python and Django (Rest Framework) or related frameworks, e.g. Flask, FastAPI or similar Good understanding of ORM (either Django or SQLAlchemy) Good understanding of Python Unit Testing More ❯

Senior Backend Developer (C#/.Net) | Brand New Trading Payments Desk | £130,000 + Bonus + Benefits | London Hybrid I am looking for a Senior Backend Engineer with a .Net (C#) focus for a Trading House that build cross asset trading systems. The FinTech are building from the ground up and currently expanding their team to work … on a completely greenfield build, payments platform. As a Senior Backend, your role will be to come in and build out a new Payments platform working very closely with another engineer to redesign parts of the system and lead from the front in terms of the build. Responsible for developing new features for the public website and client portal. … This Senior Backend developer role is paying up to £130,000 + bonus + benefits 📍Located in London City, St Paul's, with 3 days per week from the office 🧑.Net, C#, .Net Core Responsibilities of the Senior Backend Developer: Designing, coding, and testing all components of modern web applications. Contribute to the overall architecture and More ❯

Senior Backend Developer (C#/.Net) | Brand New Trading Payments Desk | £130,000 + Bonus + Benefits | London Hybrid I am looking for a Senior Backend Engineer with a .Net (C#) focus for a Trading House that build cross asset trading systems. The FinTech are building from the ground up and currently expanding their team to work … on a completely greenfield build, payments platform. As a Senior Backend, your role will be to come in and build out a new Payments platform working very closely with another engineer to redesign parts of the system and lead from the front in terms of the build. Responsible for developing new features for the public website and client portal. … This Senior Backend developer role is paying up to £130,000 + bonus + benefits 📍Located in London City, St Paul's, with 3 days per week from the office 🧑.Net, C#, .Net Core Responsibilities of the Senior Backend Developer: Designing, coding, and testing all components of modern web applications. Contribute to the overall architecture and More ❯

Backend Developer This role is Hybrid, 3-4 days p/w in London, Camden. This opportunity does not offer sponsorship. La Fosse are partnering with an exciting Ai Scale-Up , who are looking to extend their software development team. The successful candidate will be joining one of the core product development teams to help enhance their products … and services. As a Backend Developer, you will be helping deliver ground-breaking Ai products to market, playing a pivotal role in designing, developing, and maintaining current and new capability. Key Requirements: Python Django GraphQL Kubernetes Git Excellent educational background Compensation: This role is offering up to £85,000 + benefits. How to apply: Please apply through the More ❯

Backend Developer This role is Hybrid, 3-4 days p/w in London, Camden. This opportunity does not offer sponsorship. La Fosse are partnering with an exciting Ai Scale-Up , who are looking to extend their software development team. The successful candidate will be joining one of the core product development teams to help enhance their products … and services. As a Backend Developer, you will be helping deliver ground-breaking Ai products to market, playing a pivotal role in designing, developing, and maintaining current and new capability. Key Requirements: Python Django GraphQL Kubernetes Git Excellent educational background Compensation: This role is offering up to £85,000 + benefits. How to apply: Please apply through the More ❯

Senior Python Backend Developer - Python, AWS, Django Central London/Hybrid -one day in the office £75-85k + benefits Were seeking a topflight Senior Python Backend Developer with a strong software engineering background including 8-9+ years majoring in writing Backend applications using Python and Django (Rest Framework) click apply for full More ❯

Backend Developer Location: Hybrid - London Package: Negotiable + Benefits We are seeking a skilled and motivated Server-Side Developer to work on our Platform. It is a custom-built online quote, bind and formal documentation issuance platform, that also offers a range of analytics to assist with underwriting, portfolio analysis and product performance. You will be working … performance, and scalability. Troubleshoot and debug server issues, providing timely solutions. Implement security and data protection measures. Keep up to date with emerging trends, technologies, and best practices in backend development. About you: Experience as a Backend Developer or similar role. Proven high proficiency in ASP.NET and .NET (C#) and SQL. Experience with backend frameworks and More ❯

Backend Developer Location: Hybrid - London Package: Negotiable + Benefits We are seeking a skilled and motivated Server-Side Developer to work on our Platform. It is a custom-built online quote, bind and formal documentation issuance platform, that also offers a range of analytics to assist with underwriting, portfolio analysis and product performance. You will be working … performance, and scalability. Troubleshoot and debug server issues, providing timely solutions. Implement security and data protection measures. Keep up to date with emerging trends, technologies, and best practices in backend development. About you: Experience as a Backend Developer or similar role. Proven high proficiency in ASP.NET and .NET (C#) and SQL. Experience with backend frameworks and More ❯

Contract Backend Developer – Node.js Avanti Recruitment is working with a fast-growing London-based technology business developing smart systems for the property and compliance sector. Their platform integrates hardware and software to provide real-time insights and automated reporting across multiple environments. They’re seeking a Backend Developer with strong Node.js and GraphQL experience to help More ❯

Senior Backend Developer - Up to £700pd Inside IR35 - Full Remote One of the most recognisable financial services companies in the UK is on the hunt for Backend Engineers. They are revolutionizing the way people manage their money and would love YOU to help them on their journey! You will be responsible for building scalable, high-performance Back … and performance mindset Location - Full remote (from the UK) Duration - 6 months (Ave tenure of contractor at this client is 17 months) Rate – Up to £700pd inside IR35 Senior Backend Developer - Up to £700pd Inside IR35 - Full Remote More ❯

Senior Backend Developer - Up to £700pd Inside IR35 - Full Remote One of the most recognisable financial services companies in the UK is on the hunt for Backend Engineers. They are revolutionizing the way people manage their money and would love YOU to help them on their journey! You will be responsible for building scalable, high-performance Back … and performance mindset Location - Full remote (from the UK) Duration - 6 months (Ave tenure of contractor at this client is 17 months) Rate – Up to £700pd inside IR35 Senior Backend Developer - Up to £700pd Inside IR35 - Full Remote More ❯

Senior Backend Developer - Up to £700pd Inside IR35 - Full Remote One of the most recognisable financial services companies in the UK is on the hunt for Backend Engineers. They are revolutionizing the way people manage their money and would love YOU to help them on their journey! You will be responsible for building scalable, high-performance Back … and performance mindset Location - Full remote (from the UK) Duration - 6 months (Ave tenure of contractor at this client is 17 months) Rate – Up to £700pd inside IR35 Senior Backend Developer - Up to £700pd Inside IR35 - Full Remote More ❯

Senior Backend Developer - Up to £700pd Inside IR35 - Full Remote One of the most recognisable financial services companies in the UK is on the hunt for Backend Engineers. They are revolutionizing the way people manage their money and would love YOU to help them on their journey! You will be responsible for building scalable, high-performance Back … and performance mindset Location - Full remote (from the UK) Duration - 6 months (Ave tenure of contractor at this client is 17 months) Rate – Up to £700pd inside IR35 Senior Backend Developer - Up to £700pd Inside IR35 - Full Remote More ❯

Senior Backend Developer - Up to £700pd Inside IR35 - Full Remote One of the most recognisable financial services companies in the UK is on the hunt for Backend Engineers. They are revolutionizing the way people manage their money and would love YOU to help them on their journey! You will be responsible for building scalable, high-performance Back … and performance mindset Location - Full remote (from the UK) Duration - 6 months (Ave tenure of contractor at this client is 17 months) Rate – Up to £700pd inside IR35 Senior Backend Developer - Up to £700pd Inside IR35 - Full Remote More ❯

Lead Backend Developer Location: London - 1x a month Salary: Up to £120,000 (D.O.E) + benefits Fruition Group are partnering with a high-growth Insurtech unicorn that's scaling its engineering function. This is a unique chance to work across both proven, revenue-generating products and greenfield initiatives that are reshaping the future of insurance. It's an … ideal role for a driven Lead Engineer who thrives in ambitious environments and wants to make a tangible impact. As a Lead Backend Engineer, you'll take ownership of designing and scaling cloud-native backend systems. You'll work primarily with Python (FastAPI) and play a key role in shaping the architecture of microservices that support millions of … decisions. This is a high-impact role where your work directly drives product growth, system resilience, and platform evolution. What will I be doing: Design, develop, and optimise scalable backend services in Python, leveraging FastAPI. Lead architectural discussions with a focus on performance, scalability, and reliability. Deliver complex features end-to-end - from design through deployment and monitoring. Provide More ❯

Senior Backend Developer Location: London - 1x a month Salary: Up to £95,000 (D.O.E) + benefits Fruition Group working with a leading Insurtech unicorn on a mission to transform the insurance industry. Their products have already generated millions in revenue, and now they're investing heavily in new innovations that will shape the sector for years to come. … This is an exciting opportunity for a motivated Senior Engineer who wants to grow in a high-performing, forward-thinking business. As a Senior Backend Engineer, you'll play a central role in building and scaling the systems that power their insurance platform. You'll focus on developing Python-based cloud microservices (FastAPI preferred), contributing to the architecture of More ❯

Senior Backend Developer Location: London - 1x a month Salary: Up to £95,000 (D.O.E) + benefits Fruition Group working with a leading Insurtech unicorn on a mission to transform the insurance industry. Their products have already generated millions in revenue, and now they're investing heavily in new innovations that will shape the sector for years to come. More ❯

Lead Backend Developer Location: London - 1x a month Salary: Up to £120,000 (D.O.E) + benefits Fruition Group are partnering with a high-growth Insurtech unicorn that's scaling its engineering function. This is a unique chance to work across both proven, revenue-generating products and greenfield initiatives that are reshaping the future of insurance click apply for More ❯

Senior Backend Developer (Python) Kings Cross, London- Onsite 2/3 days a week 6 month contract Inside of IR35 £750 - £800 per day My client is seeking a highly skilled software engineer to join its AI/ML team, contributing to the development of cutting-edge applications that accelerate drug discovery and enable personalised therapies. The ideal … candidate will have strong Python backend development experience, preferably with FastAPI, and be proficient in cloud-native infrastructure (Google Cloud preferred), DevOps practices, and automated testing. While a background in life sciences is a plus, a passion for improving healthcare through technology is essential. The role involves integrating AI/ML components into scalable web applications, collaborating across technical … teams, and continuously improving software quality and performance. Key responsibilities Back end development for a Python web application Integration of AI/ML components with frontend, backend, data and compute infrastructure Responsible for high quality software implementations according to best practices, including automated test suites and documentation Develop, measure, and monitor key metrics for all tools and services and More ❯

Role: Backend Software Developer Salary: £90,000 P/A + Comps Location: London (Hybrid/Flexible working) Client: Start up/Scale Up Are you a Python expert ready to build cutting-edge systems powering real-world AI innovation? Join one of London's most exciting AI startups, where we're scaling fast and solving complex problems … at the intersection of technology, data, and intelligence. We're looking for a Backend Developer who thrives in dynamic environments - someone who loves clean code, scalable architecture, and being part of a team that's pushing boundaries. What you'll do Design, build, and optimize high-performance Back End systems in Python and FastAPI Develop and maintain Back More ❯

Infastructure/Backend Developer Contract Type: 6-month initial engagementStart Date: 1st December 2025Location: Remote (UK-based)Rate: £350 per day (Inside IR35)Clearance Required: BPSS prior to start MUST HAVE NHS OR GOVERNMENT EXPERIENCE Role OverviewThe client is seeking a mid-to-senior level contractor with strong backend and infrastructure development experience. The successful candidate will … 3rd line support and develop tools to streamline support operations* Apply test-driven development and CI/CD methodologies in an Agile environment The ideal candidate will:* Have strong backend development experience, ideally with SQL and RDS* Demonstrate excellent problem-solving skills and a passion for working with data* Be comfortable working with legacy Oracle PL/SQL code More ❯

Infastructure/Backend Developer Contract Type: 6-month initial engagement Start Date: 1st December 2025 Location: Remote (UK-based) Rate: £350 per day (Inside IR35) Clearance Required: BPSS prior to start MUST HAVE NHS OR GOVERNMENT EXPERIENCE Role Overview The client is seeking a mid-to-senior level contractor with strong backend and infrastructure development experience. The … 3rd line support and develop tools to streamline support operations * Apply test-driven development and CI/CD methodologies in an Agile environment The ideal candidate will: * Have strong backend development experience, ideally with SQL and RDS * Demonstrate excellent problem-solving skills and a passion for working with data * Be comfortable working with legacy Oracle PL/SQL code More ❯

Job Title: BackEnd Technical Support Developer Location: London, UK Work Pattern: Hybrid – 3 days onsite, 2 working from home Salary: up to £50,000 per annum + on call bonus Job Position: Permanent Additional Info: This position does require you to be on call every 5th week (extra pay on top of your salary) We are looking for … a dedicated BackEnd Technical Support Developer 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. What we’re looking for from a Back End Developer: The right candidate needs to be hungry to learn, a good problem solver and can prioritise what is important and get it done. It is very much a role that is a combination of a digital detection and More ❯

Job Title: BackEnd Technical Support Developer Location: London, UK Work Pattern: Hybrid – 3 days onsite, 2 working from home Salary: up to £50,000 per annum + on call bonus Job Position: Permanent Additional Info: This position does require you to be on call every 5th week (extra pay on top of your salary) We are looking for … a dedicated BackEnd Technical Support Developer 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. What we’re looking for from a Back End Developer: The right candidate needs to be hungry to learn, a good problem solver and can prioritise what is important and get it done. It is very much a role that is a combination of a digital detection and More ❯

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. Responsibilities : Design, implement, and manage backend applications and APIs using Node.js Work with RESTful APIs and external More ❯