1 to 25 of 96 Permanent Backend Developer Jobs in the UK

Senior Backend Developer Jobs at SILA Linguists Company: SILA Linguists Location: Scotland We are looking for a Senior Backend developer to join SILA Linguists. Our Startup is a Language Service Provider (LSP) which has developed highly advanced and secured solutions. As a Senior developer … will be working across the full development lifecycle, working with our developers' team to provide outstanding solutions. You will help maintain and develop backend services, including our applications and websites. SILA Linguists is searching for experienced Senior Backend Developer to join our team. As a Senior Backend ...

NodeJS Backend Developer 9-Month FTC Salary negotiable DoE Remote Your new role As a NodeJS Backend Developer, you’ll take ownership of delivering backend features from initial design through to production, working as part of a fast-moving Agile SaaS team. You’ll build … another cloud platform, messaging technologies such as Kafka or RabbitMQ, gRPC and OAuth2 would be advantageous. Most importantly, you’ll be a proactive developer who takes ownership, enjoys solving problems and is focused on delivering high-quality, functioning software. In return You’ll join a fast-growing SaaS business ...

Senior .NET Backend Developer Location: York (Hybrid - 2 days per week) Salary: Competitive + Benefits We're partnering with an established technology business undergoing a significant platform modernisation programme and are looking to appoint a Senior .NET Backend Developer to play a key role in shaping … help drive technical direction, champion best practice and contribute to the evolution of a high-performing development function. The Role Design, develop and maintain backend services and APIs using C# and modern .NET/ASP.NET Core. Contribute to architectural decisions across backend services, integrations and data. Modernise legacy ...

backend developer who's just as comfortable in a Kubernetes cluster as you are in a PHP codebase, and fancies Friday afternoons off? We're looking for a Senior Backend Developer to join our growing digital team, taking on real ownership of our backend systems … rather than reporting up through layers of process. You'll report to our Head of Delivery and work closely with the rest of the backend team, but this is an individual contributor role with no direct reports. If you're comfortable in modern PHP, properly comfortable ...

looking for a Senior Backend Developer who enjoys solving complex problems and building systems that scale. You’ll be part of a tight-knit, cross-functional squad that owns its products from idea to production. You’ll have the freedom to lead and make technical decisions, the space … experiment, and the support to keep developing your skills. We’ll encourage you to grow into a T-shaped developer, with opportunities to get involved in architecture, DevOps and other areas of development. We work together in our Liverpool HQ three days a week because we value collaboration, fast ...

Senior .NET Backend Developer Location: York (Hybrid - 2 days per week) Salary: Competitive + Benefits We're partnering with an established technology business undergoing a significant platform modernisation programme and are looking to appoint a Senior .NET Backend Developer to play a key role in shaping ...

range of solutions in the fields of therapeutic procedures, hospital operations, and life sciences in more than 160 countries and regions. Position Summary The Backend Developer is a hands-on software engineering role within the Digital team, contributing to the delivery of secure, maintainable cloud services and APIs … regulated medical device and data solutions developed within OrganOx quality and software lifecycle processes. Working closely with internal stakeholders and external development partners, the Backend Developer designs, develops, tests, documents, and maintains server-side applications, APIs, databases, and cloud-based services that underpin OrganOx digital products and have ...

Backend Systems Developer - Build the integrations that keep a high-growth digital business moving. Salary: £40,000 - £60,000 Location: Hybrid (3 Days - Runcorn) About the Opportunity We're partnering with an ambitious technology-driven organisation that's investing heavily in its engineering capability. They're looking … experienced Backend Systems Developer to help build and enhance the integrations that sit at the heart of a large-scale digital platform.This is an opportunity to work on business-critical systems where reliability, scalability and performance genuinely matter. You'll be developing the services that connect customer-facing ...

About the Role Our client is actively seeking a talented and experienced Remote Software Developer (Backend) to join their engineering team. This role is focused on designing, developing, and maintaining robust, scalable, and high-performance backend systems and APIs that power their innovative applications. You will work … capacity, collaborating with a distributed team of engineers, product managers, and designers to deliver exceptional software solutions. This is an ideal opportunity for a backend specialist who is passionate about building efficient and reliable server-side logic and thrives in a flexible, remote work environment. Key Responsibilities Design, develop ...

Senior Backend Developer will be responsible for designing and implementing robust and scalable backend systems to support the company's iGaming products and services. About 5 Star iGaming Media 5 Star iGaming Media is a leading agency in the iGaming industry, providing a range of digital marketing ...

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. ...

ethical AI and privacy (GDPR compliance) make it a user‐friendly yet enterprise‐grade solution. About the Role We are looking for a Backend Developer who can independently manage, maintain, and evolve Fogsphere’s microservices codebase and proprietary libraries. You will be responsible for implementing new product features … maintaining and writing database migration scripts, identifying and fixing bugs autonomously, and ensuring high-quality, reliable backend services across our platform. This role requires strong ownership, hands‐on problem‐solving, and the ability to work within a distributed, cloud‐native environment. Key Responsibilities Develop, maintain, and optimize backend ...

Optix is modernising a large, established Windows desktop platform into a modern web product. We are looking for a senior .NET backend developer with deep engineering experience, strong architectural judgement and a practical approach to modern development tools. This is a hands-on role with significant responsibility … backend architecture and delivery. You will design .NET services and APIs, turn complex legacy behaviour into maintainable solutions, and help improve engineering practices across the team. What you'll be doing Design and implement complex backend functionality using C# and modern .NET/ASP.NET Core. Make and communicate ...

hiring a hands‐on Backend Developer to build and ship production serverless services for a fintech platform. Languages: TypeScript, Node.js (18–22) AWS: Lambda, DynamoDB, S3, SQS, EventBridge, Step Functions Frameworks/middleware: Serverless Framework, Middy Libraries: Zod (schemas/validation), Winston (logging), AWS X‐Ray (tracing), Luxon … protect releases (Mocha/Sinon), keep quality bars high, and reduce regressions. We’re ready to meet you, if... You have strong hands‐on backend engineering experience in TypeScript/Node.js. You have real AWS production experience — not “used Lambda once”, but built, operated, debugged, and fixed systems ...

BetStarters is seeking a Senior Backend Developer to design and implement robust backend systems powering our iGaming platform. The role focuses on scalable architectures, performance optimisations, and reliable services that underpin real-time gaming experiences. The ideal candidate will contribute to system design, code quality, and collaboration ...

Backend Software Engineer Manchester - 2 days in the office 6 Months Contract + Extension £72.00 per hour A global e-commerce product organisation is urgently looking for experienced Backend Engineers to help lay the technical groundwork for scaling global partner connectivity across our travel and attractions ecosystem. … streams, real-time messaging, webhooks, and complex data translations-ensuring seamless communication between external platforms and internal microservices. Responsibilities Architect, deploy, and manage distributed backend microservices powering critical third-party integrations. Create reliable, event-driven data flows to process partner product updates, availability matrices, and transactional notifications. Apply strong ...

Level Backend Developer will be responsible for designing, developing, and maintaining the backend systems that power Stakemate's iGaming platform. About Stakemate Stakemate is a fast-growing iGaming agency based in London with a team of 20 employees. Estimated Benefits Health Insurance Retirement Savings Plan Paid Time ...

Backend Java Developer – City London We are urgently looking to recruit a Java backend Developers with at least 5 years experience. Must have strong Data structures and Algorithms experience. Also experience of Spring, working with large code base, SQL, Unix etc. You should ideally have a solid ...

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 ...

Trading Software Firm, City of London, 40 man flat Dev TeamPay: 80k, 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, 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 ...

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 ...

Backend Systems Developer - Build the integrations that keep a high-growth digital business moving. Salary: £40,000 - £60,000 Location: Hybrid (3 Days - Runcorn) About the Opportunity We're partnering with an ambitious technology-driven organisation that's investing heavily in its engineering capability click apply for full ...

Backend Software Engineer - Java at Capco Location: Edinburgh (Hybrid) | Type: Permanent The Role Capco is growing our Engineering team and we're looking for experienced Backend Engineers with strong Java skills and a passion for delivering innovative solutions in financial services. If you enjoy solving complex problems, working … with cloud-native technologies, and collaborating in agile teams, we'd love to hear from you. As a Backend Engineer at Capco, you'll contribute to high-impact, client-facing projects that shape the future of financial services. You'll work alongside talented engineers, have access to industry-leading ...