1 to 25 of 35 Permanent Backend Developer Jobs in the UK

Backend .NET Developer (C#/Web API) Norwich, Norfolk | £38,000 | Full-Time We're recruiting a Backend .NET Developer to join a Norwich-based software business, working on the development and ongoing improvement of a data analytics platform used by businesses to access and understand … information. Working as part of a small development team and reporting to the Chief Technology Officer, you'll be responsible for building and maintaining backend services, developing APIs and integrating data from multiple sources. This is a hands-on development role with involvement in new features, system performance ...

Backend Developer (Go) Salary: Up to £61,000 per annum Contract: 12-month FTC, with potential for extension Location: London - hybrid, 2 days a week on site Our prestigious client is looking for a Backend Developer to join a growing AI and automation team, building services … native Azure platform. Your work will connect enterprise systems, automate processes and deliver practical improvements across the organisation. The role Design, build and maintain backend services, primarily in Go, with Python where appropriate. Develop REST APIs, webhooks and event-driven integrations connecting internal systems and third-party platforms. Contribute ...

Senior Backend Developer (Java/AWS) Rate: £500-£600 per day (Outside IR35) Location: London (3 days per month onsite) Duration: Initial 6-month contract Overview We're supporting a financial services client looking for a Senior Backend Developer to help deliver and optimise a suite … hands-on engineering role with significant involvement in solution design, technical direction, and code quality. What You'll Be Doing Developing scalable backend services using Java and Spring Boot Designing and building RESTful APIs and event-driven solutions Deploying and maintaining applications within AWS environments Contributing to architecture, engineering ...

Senior Backend Developer (Java/Spring Boot/AWS) Rate: £500 - £600 Outside IR35 Location: London - 3 times on site a month Duration: 6 months initial The role: I'm working with a financial services organisation that needs a Senior Backend Developer to build and maintain ...

Software Engineer, Developer, Backend – Java – Identity - IAM, Security Check out the role overview below If you are confident you have got the right skills and experience, apply today. Contract – Until End of December 2026 (Renewable) Rate: £600 per day – Inside IR35 Location:Essex based offices (between Brentwood … week The banking and finance arm of one of the world's leading manufacturing companies and a household name is seeking asoftware engineer, software developer with Backend, Back End and Identity Access Management (IAM) expertise. The Backend Software Engineer will join the Identity Management Services team ...

Software Engineer, Developer, Backend – Java – Identity - IAM, Security Contract – Until End of December 2026 (Renewable) Rate: £600 per day – Inside IR35 Location:Essex based offices (between Brentwood and Basildon) 4 days a week The banking and finance arm of one of the world’s leading manufacturing companies … household name is seeking a software engineer, software developer with Backend, Back End and Identity Access Management (IAM) expertise. The Backend Software Engineer will join the Identity Management Services team, (IAM) focusing on the core platform work that powers identity infrastructure. Main Tasks & Responsibilities: > Design and build ...

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. ...

C# Backend Developer – Hedge Fund Up to 95,000 + BonusQuant Capital is urgently looking for a C# Developer to join our high profile client. A $1billion strong Hedge fund with performance figures of 13%. They trade a number of products across but mainly … working on is porting existing systems to C# and modernising adjacent systems and applications. This would be a great opportunity for a senior developer looking for a role with a large amount of responsibility and the ability to have an input on design and architecture decisions. ...

Fully remote (UK) | £80,000-£85,000 + healthcare, pension, holiday etc We're hiring a hands-on Senior Java Backend Developer to join our health tech clients Integrations team, building secure, reliable payment capabilities for their platform, a cloud-based SaaS platform used across the UK. ...

Role: Backend Systems Developer Salary: £40,000 £60,000 Location: Liverpool Working Pattern: Hybrid Were working with an ambitious, technology-led organisation that is continuing to invest significantly in its engineering function. Theyre looking for an experienced Backend Systems Developer to join the team and play … platform. This is a great opportunity to work on business-critical systems where performance, scalability and reliability are essential. Youll be responsible for developing backend services that connect customer-facing applications with warehouse, ERP, finance and wider operational platforms, supporting the accurate and efficient movement of millions of data ...

Fully remote (UK) £80,000-£85,000 + healthcare, pension, holiday etc We're hiring a hands-on Senior Java Backend Developer to join our health tech clients Integrations team, building secure, reliable payment capabilities for their platform, a cloud-based SaaS platform used across the UK. ...

Trading Software Firm, City of London, 40 man flat Dev TeamPay: 85k, 20% Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingC# Backend Developer FintechQuant is urgently looking for a junior and senior C# Software Engineer to join our high profile client. Current challenges greenfield trading ...

handle over 6 million HTTP requests daily and process more than 1.5 million bets per hour at peak. Job Description As a Backend Developer,youllbuild the engine behind ourFollowScoresapp, turning complex data intoreal-time updates formillions of football fans. TheFollowScoresteam builds the technology behind our popular football scores … scaling the platform to reach more users and launching fresh, innovative features to keep fans at the heart of the action. The backend team manages the systems delivering data to iOS and Android apps via web sockets and REST APIs. This involves working with Golang, Redis ...

handle over 6 million HTTP requests daily and process more than 1.5 million bets per hour at peak. Job Description As a Backend Developer,youllbuild the engine behind ourFollowScoresapp, turning complex data intoreal-time updates formillions of football fans. TheFollowScoresteam builds the technology behind our popular football scores … scaling the platform to reach more users and launching fresh, innovative features to keep fans at the heart of the action. The backend team manages the systems delivering data to iOS and Android apps via web sockets and REST APIs. This involves working with Golang, Redis ...

handle over 6 million HTTP requests daily and process more than 1.5 million bets per hour at peak. Job Description As a Backend Developer, you'll build the engine behind our FollowScores app, turning complex data into real-time updates for millions of football fans. The FollowScores team … scaling the platform to reach more users and launching fresh, innovative features to keep fans at the heart of the action. The backend team manages the systems delivering data to iOS and Android apps via web sockets and REST APIs. This involves working with Golang, Redis ...

handle over 6 million HTTP requests daily and process more than 1.5 million bets per hour at peak. Job Description As a Backend Developer, you'll build the engine behind our FollowScores app, turning complex data into real-time updates for millions of football fans. The FollowScores team … scaling the platform to reach more users and launching fresh, innovative features to keep fans at the heart of the action. The backend team manages the systems delivering data to iOS and Android apps via web sockets and REST APIs. This involves working with Golang, Redis ...

Role: Backend Systems Developer Salary: £40,000 - £60,000 Location: Liverpool Working Pattern: Hybrid We're working with an ambitious, technology-led organisation that is continuing to invest significantly in its engineering function. They're looking for an experienced Backend Systems Developer to join the team ...

Backend C# Developer- Quant Fund200,000 Plus Bonus4 days in the office – some room for negotiationQuant Capital is urgently looking for a Senior Backend C# Developer to join our high profile client. Our client is a $5 billion strong systematic quant commodity trading fund with excellent … have a deep understanding of code not just the ability to read the language, expectations are high so if you are not a serious developer, don't waste your time. My client is based in LondonC# Winforms, Quant Fund, Developer, .NET, SQL VBA VS 2010 Visual studio ...

Principal Backend Engineer – JavaLocation: Glasgow (Hybrid) | Practice Area: Technology & Engineering | Type: PermanentArchitect the next generation of financial platforms. Lead with Java expertise. Deliver impact at scale. The RoleWe're looking for a Principal Backend Engineer (Java) to join our Technology & Engineering team. This leadership-level role calls … deep technical acumen, a security-first mindset, and strong coaching capabilities. You'll architect cloud-native backend systems, shape our engineering standards, and mentor teams to deliver high-performance platforms for global financial clients. This role will sit in our Scotland office, with a need to potentially work ...

looking for a Backend Engineer to take ownership of one of our core backend platform domains, helping shape the technical direction of a modern cloud-native environment built around Go, TypeScript, and AWS.This is a hands-on leadership role suited to someone who enjoys solving complex engineering problems … also mentoring developers, driving technical standards, and influencing architecture across the wider platform team. You’ll play a key role in building scalable, reliable backend services while helping establish engineering best practices and long-term technical direction.What You’ll Be DoingLead the technical direction and architecture of backend ...

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software … June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of GitLab.As a Staff Backend Engineer in the Developer Experience group, you’ll work cross-functionally to help us identify and improve the engineering experience across GitLab’s internal ...

Effective. Be Highly Aligned, Loosely Coupled. Disagree Transparently. Encourage Independent Decision-Making. Build Dream Teams. Who You Are: You'll design and build backend systems powering blockchain infrastructure and staking products across Galaxy — spanning Ethereum-based systems, staking infrastructure (native and liquid), and blockchain data systems and APIs. Liquid … roughly 60% building systems and features, 20% code review and mentorship, 20% design, architecture, and product collaboration. What You'll Do: Build and own backend systemsDesign and build APIs, services, Ethereum data pipelines and indexers, staking and validator infrastructure integrations, and monitoring and operational tooling. Own system design ...

Backend Software Engineer Term: 6 Months Pay: £888 per day Inside IR35 Location: Kings Cross London Hybrid Our client see a world in which advanced applications of Machine Learning and AI will allow us to develop novel therapies to existing diseases and to quickly respond to emerging or changing … career and development from day one. 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 ...

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 ...

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 ...