18 of 18 Backend Developer Jobs in London

Role: Backend Developer (Core Java) We are seeking an experienced Backend Developer with strong expertise in Core Java to build scalable, high-performance APIs and work effectively within large, complex codebases. The ideal candidate will have a solid foundation in system architecture and will collaborate closely … small, agile team. This role plays a critical part in developing and enhancing a microservices-based platform that supports risk management and backend operations for both corporate and retail trading. You will also contribute to shaping the technical roadmap and improving the Software Development Life Cycle (SDLC). ...

Title: Node.js Backend Developer Salary: up to £80,000 + share options Location: Fully remote (UK) Sector: Cybersecurity SaaS We’re supporting a high-growth cyber SaaS scale-up on the hire of a Node.js Backend Developer to own production APIs and serverless microservices. ...

forefront of innovation, helping organisations transform and deliver high-quality, scalable solutions that truly matter. About the Role We are looking for a Backend Developer with strong foundations in algorithms and data structures, ideally shaped by a background in competitive programming. You'll work on building scalable Back ...

Role: Java Backend Developer with Data Platform Type: 6 Months Contract Location: London, UK (Fully REMOTE) Working Model: Fully REMOTE Payrate: £450 - £550 per Day on PAYE £530 - £630 per Day on RUPAYE £650 - £750 per Day on Inside IR35 via Umbrella The Role: Join our Data Infrastructure ...

Backend Engineer, London, £55,000 - £65,000 + Benefits (including share options) A Backend Software Engineer ( Typescript, Node.js ) is needed to join an ambitious and fast-scaling technology company operating within a regulated market. This role is based in central London 4 days a week on-site. … their product suite evolves and customer demand increases, they are investing in senior engineering talent to strengthen backend capability and long-term platform resilience. This hire is central to that journey, offering meaningful equity and the opportunity to influence architectural decisions at a critical stage of growth. The Backend ...

Use your Java and AWS knowledge to build secure, scalable cloud-based services for medical researchers London with hybrid working; to £90k DoE + options and benefits This company is developing an AWS-based platform ...

Backend/Infrastructure Engineer — London I’m working with a small, high-calibre Series A product company building developer-facing software used by millions globally. They’re hiring a Backend/Infrastructure Engineer to take ownership of the systems behind the product, improve release reliability, and help … scale the platform as they enter their next stage of growth. This is roughly 2/3 backend engineering and 1/3 platform/infrastructure — so ideal for someone who enjoys building production systems, but also cares about deployment, observability, CI/CD, and making engineering teams faster. ...

fast. We are building something that genuinely matters in a market that has not changed in decades. ⸻ The Role We are looking for a Backend Developer to help build the systems that power Hyalli. You will work closely with our lead developer and founding team to design … build, and maintain the backend infrastructure behind our web and mobile platform. This is a hands-on role. You will have real ownership over technical decisions and the opportunity to shape how we build from the ground up. Location: Remote-first, UK based. Occasional travel to Manchester. ⸻ What ...

Description: As a Specialist II in Backend Development, you will leverage your expertise in Java 17/21 and Java EE library migrations to enhance and upgrade middleware systems. Your role will involve working with Oracle 19C databases and ensuring seamless SOAP/REST integration. Key Responsibilities: Develop … maintain backend systems using Java 17/21 and the Spring MVC framework. Manage and execute Java EE library migrations and middleware upgrades. Ensure efficient database management and operations with Oracle 19C. Implement and maintain SOAP/REST integrations to support system interoperability. Collaborate with cross-functional teams ...

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 … 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 ...

Lead Backend Software Developer (Contract) London, Outside IR35 £500-£600 per day This is an exciting opportunity to join a fast-moving engineering function at a pivotal moment of technical uplift. They are investing heavily in strengthening their core platforms and commercial data systems, creating a strong mandate … step in, lead, and make an immediate impact. The Company They are a growing digital gaming organisation operating across multiple markets, currently modernising their backend ecosystem. With distributed teams across the UK and Europe, they are building scalable platforms that support a variety of customer-facing and internal products. ...

Senior Developer, Back End, API, .Net SQL, NW London to £80K (office based role) A Senior Back End Developer is required to join this established financial software house based in North London. They work with some of the leading brands in retail and media, offering financial management systems … developed in house by their small dynamic team of tech professionals. Due to growth a Senior Developer is required with expertise in .NET, C#/VB, SQL Server, and SAP Business One integration. The ideal candidate should have strong skills in RESTful API development, database optimization, and Azure DevOps ...

Back end Software Developer - Data Centres Remote - Working from home £70,000 - £90,000 Overview This role focuses on developing reliable, high-performance backend services and supporting the infrastructure they run on. You’ll work primarily with Python, contributing to API development, system design, and automation, while ensuring … everything is robust, maintainable, and production-ready. You’ll be part of a collaborative, remote-first engineering team, working across the full lifecycle of backend development—from design through to deployment and ongoing improvement. What You’ll Do Build & Scale Backend Services Develop and maintain backend services ...

Searchability are partnered with a well-funded Series A startup building one of the most exciting collaborative canvas/whiteboard developer platforms in Europe. Their product enables companies to build rich multiplayer drawing, diagramming and infinite canvas experiences directly into their own applications, with customers including major global tech … brands. The business has raised over $10m in Series A funding and is scaling rapidly following strong developer adoption and product growth. They’re now looking for a Backend & Infrastructure Engineer to join their product-focused engineering team in London. This is a highly hands-on role focused ...

company is profitable, bootstrapped, and growing quickly, with a team of 30+ across London, NYC, and Sydney. The Role This is a high-ownership backend engineering role focused on building and scaling systems that power an AI-driven research platform. You’ll work across backend systems, data pipelines … internal infrastructure — partnering closely with product, commercial, and operations teams to automate workflows and improve decision-making. What You’ll Do Design and scale backend systems supporting LLM workflows, vector search, and orchestration Build data pipelines and internal platforms integrating product, CRM, and financial systems Develop automation and internal ...

Senior Backend Engineer | Mobile | Monetisation | Full Remote UK/Europe I'm working with a scaling consumer mobile platform used by millions globally that is building out a brand new Monetisation squad. This is a high-impact role sitting at the centre of subscriptions, payments, pricing and entitlement systems … effectively owning the backend services that power the company's revenue engine. Tech stack: • Node.js • TypeScript • AWS • DynamoDB What they're looking for: Strong backend engineering experience in production environments Experience building subscription, billing, payments or monetisation-related systems Background working on consumer-facing or mobile products ...

Senior Backend Engineer | Mobile | Monetisation | Full Remote UK/Europe I'm working with a scaling consumer mobile platform used by millions globally that is building out a brand new Monetisation squad. This is a high-impact role sitting at the centre of subscriptions, payments, pricing and entitlement systems … effectively owning the backend services that power the company's revenue engine. Tech stack: • Node.js • TypeScript • AWS • DynamoDB What they're looking for: Strong backend engineering experience in production environments Experience building subscription, billing, payments or monetisation-related systems Background working on consumer-facing or mobile products ...

Insight Global is searching for a Sr. Backend Engineer to join the team of our largest entertainment streaming clients. This person will join the senior level team that works on the company’s multiple partnership platforms focused on search and discovery features, billing, payment, and viewing. This person should … have experience with development using Typescript, Node.js for backend development. Experience working within a heavy AWS environment working within a serverless infrastructure. They should stay up to date on the latest technologies and comfortable in a collaborative environment. The applicant must have the following: Experience utilizing Typescript and Node.JS ...