1 to 25 of 35 Backend Developer Jobs in London

Back End Developer (C#, .NET, SQL) We're supporting a well-backed SaaS scale-up in the learning-tech space who are hiring a Backend Developer to join their growing engineering team. If you enjoy building real features end-to-end, not just patching bugs, this … great fit. What you’ll be doing Building and maintaining backend services in C#, ASP.NET, .NET Working heavily with MS SQL and API development Contributing to new feature design, architecture discussions, and code reviews Helping shape a platform used by thousands of users Collaborating with a small, supportive team ...

Back End Developer (C#, .NET, SQL) We're supporting a well-backed SaaS scale-up in the learning-tech space who are hiring a Backend Developer to join their growing engineering team. If you enjoy building real features end-to-end, not just patching bugs, this … great fit. What you’ll be doing Building and maintaining backend services in C#, ASP.NET, .NET Working heavily with MS SQL and API development Contributing to new feature design, architecture discussions, and code reviews Helping shape a platform used by thousands of users Collaborating with a small, supportive team ...

Senior Backend Python Developer (Cloud & Microservices) Salary: Up to £90,000 Location: Hybrid, London HQ Reporting to: Head of AI and Data Science Overview Our client is hiring a Senior Backend Python Developer to build and maintain scalable backend systems supporting AI and automation projects. … successful candidate will work on cloud-based microservice architectures , helping integrate AI systems and backend infrastructure within the organisation’s technology ecosystem. Key Responsibilities Design and develop high-quality, efficient backend systems using Python . Build and maintain microservices and RESTful APIs . Integrate backend systems with ...

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 … 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 ...

Senior Backend Developer £70,000 - £80,000 GBP Performance bonus, 28 days leave + bank holidays, Private Medical Insurance Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Role: Senior Backend Engineer Salary: Up to £80k + performance bonus and benefits Location: London (Hybrid … data processing, and user experience . The environment is supportive, valuing creativity, continuous learning, and flexibility through hybrid working. They are seeking a Senior Backend Engineer to build highly scalable and maintainable services using modern technologies.. What You'll Do: Develop backend services in Python (FastAPI/Django ...

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 … 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 ...

Senior Python Backend Developer Kings Cross, London- Onsite 2/3 days a week 6 month contract Inside of IR25 £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 ...

Senior Backend Developer £70,000 - £80,000 GBP Performance bonus, 28 days leave + bank holidays, Private Medical Insurance Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Role: Senior Backend Engineer Salary: Up to £80k + performance bonus and benefits Location: London (Hybrid ...

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 ...

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 ...

division. You won't just be joining a team; you'll be the first to help build and shape it. As a Senior Backend Developer, you will: Design & Scale Core Pipelines: Architect, implement, and deploy our complex, highly-scalable data processing pipeline focused on analyzing massive amounts … Drive Company Success: Tackle complex, real-world engineering challenges that directly influence the company’s product maturity and market success. About You A seasoned backend engineer (8+ years) with strong Python experience. BSc. in Computer Science/Electrical Engineering, or equivalent. Proven expertise in large scale systems , specifically focusing ...

division. You won't just be joining a team; you'll be the first to help build and shape it. As a Senior Backend Developer, you will: Design & Scale Core Pipelines: Architect, implement, and deploy our complex, highly-scalable data processing pipeline focused on analyzing massive amounts … Drive Company Success: Tackle complex, real-world engineering challenges that directly influence the company’s product maturity and market success. About You A seasoned backend engineer (8+ years) with strong Python experience. BSc. in Computer Science/Electrical Engineering, or equivalent. Proven expertise in large scale systems , specifically focusing ...

Senior Backend Engineer | High-Growth Cybersecurity Scale-Up | Fully Remote (UK) Are you ready to build the core systems that power one of the fastest-growing cybersecurity platforms on the planet? This is your chance to join a research-driven, venture-backed security scale-up that’s trusted … funding, and scaling aggressively worldwide, they’re on a mission to reshape how organisations stay ahead of real-world cyber threats. As a Senior Backend Engineer , you’ll play a key role in building scalable, high-performance backend systems that ingest, process, and serve data on millions ...

Location: London, UK Industry: Investment Banking We’re looking for an experienced Backend Developer to join a leading investment bank and help drive innovation that empowers people and businesses across Asia, Africa, and the Middle East. This role is part of the Blade function, delivering strategic initiatives that … make a real impact. Prior banking experience is highly desirable. The Key Responsibilities As a senior developer, you’ll be driving our platform forwards and delivering quality solutions to business-critical customer requirements. Based in London, you will collaborate in a dynamic global team with fellow technologists, business analysts ...

Location: London, UK Industry: Investment Banking We’re looking for an experienced Backend Developer to join a leading investment bank and help drive innovation that empowers people and businesses across Asia, Africa, and the Middle East. This role is part of the Blade function, delivering strategic initiatives that … make a real impact. Prior banking experience is highly desirable. The Key Responsibilities As a senior developer, you’ll be driving our platform forwards and delivering quality solutions to business-critical customer requirements. Based in London, you will collaborate in a dynamic global team with fellow technologists, business analysts ...

Full-Stack Developer (Frontend & Backend) We're growing HiJob — AI Job-Matchmaking Work Ecosystem. We are seeking Full-Stack Developers (Frontend & Backend) to collaborate with us on current initiatives and contribute to new project opportunities as our ecosystem expands. Responsibilities: • Support team efforts and contribute to achieving ...

Full-Stack Developer (Frontend & Backend) We're growing HiJob — AI Job-Matchmaking Work Ecosystem. We are seeking Full-Stack Developers (Frontend & Backend) to collaborate with us on current initiatives and contribute to new project opportunities as our ecosystem expands. Responsibilities: • Support team efforts and contribute to achieving ...

Key Responsibilities AEM Development: Design, develop, and maintain AEM components, templates, workflows, and OSGi services using Java and the Sling framework. Front-End Integration: Collaborate with UX/UI teams to integrate front-end code ...

Senior Backend Software Engineer A rapidly scaling, AI-driven health-tech organisation (Series A funded) is hiring an experienced Senior Backend Engineer to help build and scale the backend infrastructure powering cutting-edge clinical knowledge tools used by hundreds of thousands of clinicians globally. This … small, highly capable team of clinician-engineers at the forefront of AI in healthcare. The Opportunity You will design, build, and optimise cloud-first backend systems, with a strong emphasis on AWS Serverless , LLM-powered workflows, and highly reliable production infrastructure. This is the chance to help define ...

Senior Backend Software Engineer A rapidly scaling, AI-driven health-tech organisation (Series A funded) is hiring an experienced Senior Backend Engineer to help build and scale the backend infrastructure powering cutting-edge clinical knowledge tools used by hundreds of thousands of clinicians globally. This … small, highly capable team of clinician-engineers at the forefront of AI in healthcare. The Opportunity You will design, build, and optimise cloud-first backend systems, with a strong emphasis on AWS Serverless , LLM-powered workflows, and highly reliable production infrastructure. This is the chance to help define ...

Key Responsibilities AEM Development: Design, develop, and maintain AEM components, templates, workflows, and OSGi services using Java and the Sling framework. Front-End Integration: Collaborate with UX/UI teams to integrate front-end code ...

Full Stack Developer (React, Next.js, Golang, GCP) | Backend Leaning | Consultancy | £450/Day Outside IR35 | Fully Remote A Full Stack React, Golang Developer is needed for an exciting long-term contract engagement with a high-growth digital consultancy who partner closely with some … remote contract offering exceptional autonomy, client exposure, and the chance to deliver meaningful product enhancements within the fraud/AML domain. This Full Stack Developer role is perfect for someone who is strong across React, Next.JS, Golang, Microservices and GCP, and who thrives in modern product-focused, problem-solving ...

Full Stack Developer (React, Next.js, Golang, GCP) | Backend Leaning | Consultancy | £450/Day Outside IR35 | Fully Remote A Full Stack React, Golang Developer is needed for an exciting long-term contract engagement with a high-growth digital consultancy who partner closely with some … remote contract offering exceptional autonomy, client exposure, and the chance to deliver meaningful product enhancements within the fraud/AML domain. This Full Stack Developer role is perfect for someone who is strong across React, Next.JS, Golang, Microservices and GCP, and who thrives in modern product-focused, problem-solving ...

Full Stack Developer (React, Next.js, Golang, GCP) | Backend Leaning | Consultancy | £450/Day Outside IR35 | Fully Remote A Full Stack React, Golang Developer is needed for an exciting long-term contract engagement with a high-growth digital consultancy who partner closely with some … remote contract offering exceptional autonomy, client exposure, and the chance to deliver meaningful product enhancements within the fraud/AML domain. 🚀 This Full Stack Developer role is perfect for someone who is strong across React, Next.JS, Golang, Microservices and GCP , and who thrives in modern product-focused, problem-solving ...

Full Stack Developer (React, Next.js, Golang, GCP) | Backend Leaning | Consultancy | £450/Day Outside IR35 | Fully Remote A Full Stack React, Golang Developer is needed for an exciting long-term contract engagement with a high-growth digital consultancy who partner closely with some … remote contract offering exceptional autonomy, client exposure, and the chance to deliver meaningful product enhancements within the fraud/AML domain. 🚀 This Full Stack Developer role is perfect for someone who is strong across React, Next.JS, Golang, Microservices and GCP , and who thrives in modern product-focused, problem-solving ...