21 of 21 Permanent Backend Developer Jobs in London

Senior Backend Python Developer - world class healthcare tech AWS, SQL, Python unit testing, TDD, CI/CD London hybrid - a day a week in the office c£70-85k negotiable Were seeking a Senior Backend Developer with a strong software engineering background including 5+ years majoring in writing Backend applications using Python and Django … Rest Framework). The Senior Backend Developer will be joining a top-flight team of 45 at a world-class healthcare scaleup to help scale a native mobile app by 10x over the next 12 months and take the app to the next level. The successful candidate will be analytical, proactive, and delivery focused. A high energy, self … of complexity. Proactively respond to analytics to ensure our products are robust and meet users needs Take technical ownership of areas of product Requirements: 5+ 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 ❯

leading professionals in the industry. If you're excited about partaking in shaping the narrative of decentralized finance, you'll feel right at home We're looking for: Senior Backend Developer The Role: As a senior Backend Developer, you will be a part of the team that works on the development of the backend components … provide the most professional trading experience for customers. These are developed and deployed using agile methodologies, to ensure the user experience remains the best in the industry. Scalability - all backend services that power Bitfinex platform must remain effortlessly smooth, responsive, and real-time for customers as the platform continues to scale to accommodate new user growth. A good example … is the Bitfinex API, the most solid, low-latency and complete in our industry. Security - Bitfinex makes Security its most important feature. The Backend Development team is responsible for building all the API services and backend processes with the highest security principles and standard, in order to protect the safety of the entire user base. What You Bring More ❯

We’re seeking a topflight Senior Backend Developer with a strong software engineering background including 5+ years majoring in writing Backend applications using Python and Django (Rest Framework). The Senior Backend Developer will be joining a top-flight team of 45 at a world-class healthcare scaleup to help scale a native mobile app … of complexity. Proactively respond to analytics to ensure our products are robust and meet users’ needs Take technical ownership of areas of product Requirements: 5+ 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 ❯

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 ❯

Are you a Back End Java Developer with experience within the iGaming and Gambling sector looking for a new and exciting challenge? BENEFITS : up to £95k depending on experience, fully remote, excellent benefits packageYou will be joining a rapidly expanding company within the iGaming sector, who are committed to providing top-tier gaming experiences to players around the world. … recognised among the top brands within our market, blending sports betting and online casino entertainment on a cutting-edge, custom-built platform. You will be a skilled Senior Java Backend Developer who is a self-motivated professional with a strong track record and a passion for excellence. You'll play a key role in developing innovative iGaming products … Your contributions will help deliver high-quality applications and services, reinforcing the company’s position as an industry leader. Core Responsibilities Work closely with the team to implement complex backend logic and platform solutions. Write clean, scalable, and maintainable code, adhering to industry best practices. Stay updated on the latest Java frameworks, libraries, and development techniques. Translate business needs More ❯

k + Benefits 2 days on site in North London 3 days remote I am recruting for a talented and driven Backend Engineer to join a dynamic team, focused on the creation and deployment of innovative software solutions. As a Backend Engineer, you will work closely with cross-functional teams, including engineering, product management, design, and quality assurance … features by working alongside engineering, product management, design, and QA teams. Promote best practices : Advocate and enforce coding standards, architectural patterns, and best practices. Your in-depth knowledge of backend technologies will help guide and support your peers, ensuring high-quality code. Automation and process improvement : Increase development efficiency, reliability, and scalability by creating automated processes that streamline workflows. … with Flask, FastAPI, or similar frameworks). Expertise in designing architectures that meet scalability, reliability, and security goals. Strong problem-solving skills, particularly in product development. Solid understanding of backend best practices, coding standards, and architectural patterns. Experience in automating builds (CI/CD), feature flags, and automated testing. Bonus Skills: Experience with message-driven systems (e.g., Google Pub More ❯

Backend Developer – Early Employee Opportunity We’re a fast-growing, funded startup building the next generation of data-driven platforms. As one of our early employees , you’ll join a small, multidisciplinary team working closely with the leadership team on the migration of our platform from v0 → v1 and the development of new features. This role offers a … clear path to grow into a senior developer or product owner as the company scales. What you’ll do: Build and expand backend applications using Python (FastAPI) Design and implement microservices and REST APIs Write clear documentation, unit tests, and end-to-end tests Work with AWS, Docker, SQLAlchemy, and SQL databases Deploy features via CI/CD More ❯

Backend Developer – Early Employee Opportunity We’re a fast-growing, funded startup building the next generation of data-driven platforms. As one of our early employees , you’ll join a small, multidisciplinary team working closely with the leadership team on the migration of our platform from v0 → v1 and the development of new features. This role offers a … clear path to grow into a senior developer or product owner as the company scales. What you’ll do: Build and expand backend applications using Python (FastAPI) Design and implement microservices and REST APIs Write clear documentation, unit tests, and end-to-end tests Work with AWS, Docker, SQLAlchemy, and SQL databases Deploy features via CI/CD More ❯

Backend Developer – Early Employee Opportunity We’re a fast-growing, funded startup building the next generation of data-driven platforms. As one of our early employees , you’ll join a small, multidisciplinary team working closely with the leadership team on the migration of our platform from v0 → v1 and the development of new features. This role offers a … clear path to grow into a senior developer or product owner as the company scales. What you’ll do: Build and expand backend applications using Python (FastAPI) Design and implement microservices and REST APIs Write clear documentation, unit tests, and end-to-end tests Work with AWS, Docker, SQLAlchemy, and SQL databases Deploy features via CI/CD More ❯

Backend Developer – Early Employee Opportunity We’re a fast-growing, funded startup building the next generation of data-driven platforms. As one of our early employees , you’ll join a small, multidisciplinary team working closely with the leadership team on the migration of our platform from v0 → v1 and the development of new features. This role offers a … clear path to grow into a senior developer or product owner as the company scales. What you’ll do: Build and expand backend applications using Python (FastAPI) Design and implement microservices and REST APIs Write clear documentation, unit tests, and end-to-end tests Work with AWS, Docker, SQLAlchemy, and SQL databases Deploy features via CI/CD More ❯

The Liberty Recruitment Group is excited to be working in partnership with a leading Tech-enabled Analytics Consultancy based in London, who are looking for a Senior Backend Developer to join their award-winning Insurance division. As part of a mixed technical team including back-end developers, testers, front-end developers and actuarial data scientists, you d be More ❯

The Liberty Recruitment Group is excited to be working in partnership with a leading Tech-enabled Analytics Consultancy based in London, who are looking for a Senior Backend Developer to join their award-winning Insurance division. As part of a mixed technical team including back-end developers, testers, front-end developers and actuarial data scientists, you’d be More ❯

SThree are pleased to announce we're recruiting for a talented Senior Java Backend Developer to join & guide our excellent team based in our fantastic office space located in 8 Bishopsgate, London. SThree are building a new candidate digital experience to manage the interactions that candidates and contractors have with SThree. The first part of this journey is More ❯

JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Opportunity: We’re supporting an innovative, fast-moving founding team. They’re building an innovative B2C platform with lots of partnerships already signed up! Very exciting opportunity to take a lot … ll work closely with the founding team to build scalable, secure, and high-performance systems that deliver an exceptional user experience. What You’ll Be Doing as a JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote 6+ years commercial … experience in Backend technologies, with majority focused on NestJS. Proven track record of start-up experience, working for cool innovative consumer b2c brands where you've taken ownership. Confidence working on huge datasets and complex API work Great communication skills and attitude to get your hands dirty across the stack and business challenges. Nice to have Full stack experience More ❯

JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Opportunity: We’re supporting an innovative, fast-moving founding team. They’re building an innovative B2C platform with lots of partnerships already signed up! Very exciting opportunity to take a lot … ll work closely with the founding team to build scalable, secure, and high-performance systems that deliver an exceptional user experience. What You’ll Be Doing as a JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote 6+ years commercial … experience in Backend technologies, with majority focused on NestJS. Proven track record of start-up experience, working for cool innovative consumer b2c brands where you've taken ownership. Confidence working on huge datasets and complex API work Great communication skills and attitude to get your hands dirty across the stack and business challenges. Nice to have Full stack experience More ❯

JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Opportunity: We’re supporting an innovative, fast-moving founding team. They’re building an innovative B2C platform with lots of partnerships already signed up! Very exciting opportunity to take a lot … ll work closely with the founding team to build scalable, secure, and high-performance systems that deliver an exceptional user experience. What You’ll Be Doing as a JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote 6+ years commercial … experience in Backend technologies, with majority focused on NestJS. Proven track record of start-up experience, working for cool innovative consumer b2c brands where you've taken ownership. Confidence working on huge datasets and complex API work Great communication skills and attitude to get your hands dirty across the stack and business challenges. Nice to have Full stack experience More ❯

JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote Opportunity: We’re supporting an innovative, fast-moving founding team. They’re building an innovative B2C platform with lots of partnerships already signed up! Very exciting opportunity to take a lot … ll work closely with the founding team to build scalable, secure, and high-performance systems that deliver an exceptional user experience. What You’ll Be Doing as a JavaScript Developer, Contractor, Backend Engineer | NestJS, API design, Postgres, TypeScript | Disruptive Heath Start-up, B2C | Rate £450-550/day (Outside) | 6-months | UK and EU remote 6+ years commercial … experience in Backend technologies, with majority focused on NestJS. Proven track record of start-up experience, working for cool innovative consumer b2c brands where you've taken ownership. Confidence working on huge datasets and complex API work Great communication skills and attitude to get your hands dirty across the stack and business challenges. Nice to have Full stack experience More ❯

Overview Zaizi is looking for a Senior Software Developer with solid technology skills, but who is also passionate about improving outcomes and the user experience. You'll be reliable in your own deliverables but also curious about and offer innovative ideas to others in a multi-disciplinary team. Our work culture is inclusive, modern, friendly, and democratic. We look More ❯

roles where your newly learned skills can be applied meaning a vast array of opportunities are now available to you. Examples of some of these are listed below: - Junior Developer Website Support Developer Junior Web Developer Content Editor Wordpress Developer Junior Software Developer Junior Front or Back End Development Development Support We have been helping More ❯

Backend Typescript Software Engineer ideally with a strong Computer Science academic background required to join a cloud services development team working on an industrial workflow and process management system that enables clients to monitor and proactively manage business process’. You will join an existing application development team in a very much hands on role, the ideal candidate will More ❯

Backend Development: Set up and maintain the backend server using Flask to support the application, ensuring scalability, security, and efficiency. More ❯