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C# Developer

C# .NET Developer | Azure | Contract | London Hybrid | up to £530/day Inside IR35Enterprise Digital Transformation Programme£530 per day | Inside IR35Hybrid – 3 days onsite in LondonI’m currently working with a global technology consultancy supporting a major UK enterprise organisation on a signi ...

C# Developer

C# .NET Developer | Azure | Contract | London Hybrid | up to £530/day Inside IR35Enterprise Digital Transformation Programme£530 per day | Inside IR35Hybrid – 3 days onsite in LondonI’m currently working with a global technology consultancy supporting a major UK enterprise organisation on a signi ...

Lead Node Developer Tech Scale up

Lead Node Developer / Backend Engineer (Node.js Postgres AWS) London / WFH to £100kWould you like to join a scale-up technology company in an influential role where you can take ownership and see the business impact of what you do?You could be progressing your career as a Lead Node Develo ...

Senior Software Engineer

Python Engineer (Core Trading Platform | Front Office) £80,000-£120,000 base salary plus strong package London - Hybrid We’re hiring Python Engineers to join a front office-facing platform build within a tier-one financial services organisation - this is a green ...

AI Engineer

Job DescriptionRole SummaryWe are looking for a AI (Fullstack) Engineer to help evolve Logistics into an agent‑first, AI‑native product.This is not a traditional “add AI to an existing system” role.You will design and build LLM‑powered ...

AI Engineer

Job DescriptionRole SummaryWe are looking for a AI (Fullstack) Engineer to help evolve Logistics into an agent‑first, AI‑native product.This is not a traditional “add AI to an existing system” role.You will design and build LLM‑powered ...

Senior Backend Engineer | Node.js, TypeScript | Hybrid

A dynamic software company based in London is seeking a highly experienced Lead Backend Developer. This role involves designing and building robust backend systems using Node.js and TypeScript. You will work closely with cross-functional teams to develop high-performance APIs and manage databases. Ideal candidat ...

Senior Java Backend Engineer – Data Platform

A leading technology firm in the United Kingdom is seeking a Senior Backend Developer to support a data platform programme for a global financial services organisation. The successful candidate will design and implement backend services, ensure high levels of automated testing, and integrate with various systems ...

Backend Engineer (Kotlin/Java) Remote Healthcare SaaS

A leading healthcare technology provider is seeking a remote Backend Developer proficient in Kotlin and Java. The ideal candidate will collaborate with cross-functional teams to design backend services and APIs, ensuring quality and reliability. Candidates should have at least 5 years of relevant experience, a b ...

Platform Backend Java Engineer (Hybrid, Fixed Term)

A leading consultancy firm seeks a Backend Java Developer in Birmingham to build core backend services for data access governance. The role involves heavy lifting with Java (17/21), Spring, and SQL planning. As part of a hybrid team, you will implement policies and work on high-throughput services. Strong hands- ...

Full Stack PHP/Laravel Dev — Next.js & React Expert (6mo)

AND Digital Limited is seeking a PHP Developer to join the team in Manchester for an initial six-month contract. The role involves working 2-3 days per week on-site in Crewe. The ideal candidate will have strong experience with Next.js and Laravel, building scalable web applications across both frontend and back ...

Remote Backend Engineer (TS/Node) for AI Audio Platform

Speechify in Greater London is seeking a backend developer to design, develop, and maintain robust APIs that support its innovative text-to-speech products. The ideal candidate will have proven experience in backend development using TS/Node and be knowledgeable about cloud platforms like GCP. This position offe ...

Hybrid Senior Backend Engineer C#/.NET & Azure

A vibrant technology company in Liverpool is seeking a Senior Backend Developer who enjoys solving complex problems and building scalable systems. You’ll work on backend services with .NET 8.0 and Azure, and you'll mentor other developers. They're looking for someone with solid experience in C#, .NET, and Docker ...

Senior Backend Engineer, Subscriptions — Remote & Hybrid

Spotify is seeking an experienced backend developer to design and build scalable Java services that power its merchandising platform. The role requires at least 5 years of experience in backend systems and expertise in cloud services like GCP or AWS. The position offers flexibility in work location, whether base ...

Remote Backend Engineer (TS/Node) Cloud APIs

Speechify is looking for a backend developer to join their Platform team in Reading, UK. The role involves designing and maintaining robust APIs and collaborating with cross-functional teams to enhance user experience. Ideal candidates have proven experience with backend development in TS/Node, knowledge of GCP ...

Backend Engineer — Platform & APIs (TS/Node)

Speechify in Belfast is looking for a talented backend developer to join their Platform team. In this role, you will design, develop, and maintain APIs essential for payments, subscriptions, and other services. Applicants should have proven expertise in backend development with TypeScript/Node, and experience wi ...

Backend Engineer: B2B Integrations & APIs

tombola, based in Sunderland, is seeking a Software Developer for their backend development team. You will actively contribute to building robust backend services essential for external integrations in their B2B platform. The ideal candidate will have strong knowledge of C# and .Net, experience in building APIs, ...

Developer Support Engineer

Join to apply for the Developer Support Engineer role at Braintrust Base pay range $139,400.00/yr - $228,850.00/yr About The Company Braintrust is the AI observability platform. By connecting evals and observability in one workflow, Braintrust gives build ...

Senior Backend Architect: Build Scalable Data & API Platforms

A leading technology company in Greater London seeks a Backend Software Engineer to lead the architecture and development of high-performance backend services. The role involves designing efficient data structures, building robust APIs, and collaborating with cross-functional teams. Ideal candidates will have 6+ ...

Senior Backend Engineer, Trust Detection — Remote & Growth

Depop in Greater London is seeking a Senior Backend Engineer for its Trust Detection team. In this role, you will design and deliver backend solutions, evolve core detection services, and collaborate with ML Engineers on innovative detection systems. Ideal candidates will have strong backend fundamentals and pro ...

Java Engineer

Java Engineer Location: Belfast (Hybrid) About the Company You'll join a collaborative engineering team focused on building and improving modern, scalable applications that support global platforms and services.Please double check you have the right level of experience and qualifications by reading the full ...

Front and Backend C# Dot Net Javascript Software Developer with Umbraco

Job Description Front and Backend C# Dot Net Javascript Software Developer with UmbracoOur Client is an established leader in the travel industry.They are looking to recruit a Full Stack Dot Net Software Developer to work on a major transformation programme fo ...

Java/Spring Boot/SQL/Backend dev/developer for The Climate App!

We're on a mission to create a global movement of climate action. We make climate action easy, fun & social. We are a global network of highly skilled developers, activists and professionals all on a mission to help solve the greatest threat of humankind. We’re looking for someone who cares about p ...

Senior Mobile Engineer Architect Global, Scalable Apps

A leading fintech company in Greater London seeks a Senior Mobile Developer to architect and build user-friendly mobile experiences. You will own feature development from start to finish, working with backend teams to ensure scalable solutions. Ideal candidates have a strong React Native background, experience w ...

Senior Python Quantitative Developer Central Risk & Backtesting Platform Quant Hedge Fund

Senior Python Quantitative Developer sought by a specialist and multi-award-winning Systematic Hedge Fund in a brand-new Core team designing and implementing a greenfield centralised Python/SQL/Linux/Docker platform for Backtesting, Pricing, Risk and Performance to be used across all Funds and Investment team ...

Senior Backend Engineer .NET/Azure, Remote

A leading technology firm is seeking a Senior Software Developer specializing in backend solutions. This role will involve designing and developing robust backend services and REST APIs using C# and .NET while also engaging with SQL Server and cloud-based solutions in Azure. A strong focus on coding best practic ...

Hybrid C++/Rust Engineer — Low Latency HFT

Client Server is seeking a C++ Software Engineer/Developer in London to join a profitable High Frequency Trading firm specializing in crypto markets. In this senior, hands-on role, you will design and develop high throughput backend services for real-time risk, pricing, and trading systems using C++ and Rust. Yo ...

Backend Engineer, B2B APIs & Cloud

tombola is seeking a Software Developer for their backend team in Sunderland, focusing on building scalable backend services and APIs for external partners. The ideal candidate will have strong C# knowledge, experience with .NET, and familiarity with cloud platforms like AWS. This hybrid role involves 3 days in ...

Senior .NET Backend Lead High Performance SaaS (Hybrid)

Venn is looking for a Senior .NET Web Developer (Lead) to design high-performance backend systems and ensure optimal code quality. Based in Alderley Park with a hybrid work model, the role involves leading backend development using C# and .NET. The ideal candidate will have expertise in SQL and REST API architec ...

Software Engineer Python | Django

A software engineer with at least 2 years of backend Python/Django skills is required to join the R&D, product-focused engineering team at a world-leading European software company with circa 350 people who specialise in secure video collaboration technology. The role is hybrid-based in Reading, Be ...

Senior Software Engineer

Senior Backend Engineer (Python / Go), London (Hybrid), £100,000 - £120,000 + Bonus • Job Title: Senior Backend Engineer • Salary Range: £100,000–£120,000 + Bonus & Benefits • Location: London | Hybrid Work ...

Senior Backend Engineer — Architect Scalable Microservices

A global marketing and communications company is seeking a Senior Backend Engineer to lead the design and development of backend systems. This role involves writing high-quality code, architecting distributed services, and collaborating closely with teams. Candidates should have a strong background in Python and ...

Security‑Focused Backend Engineer

A leading technology firm in Greater London is seeking a Security & Backend Engineer to enhance its core data solutions. The ideal candidate will own backend services and ensure data and system security, balancing feature delivery with long-term hardening. You should have over 5 years of experience in operating ...

Senior Backend Engineer for Palantir Foundry Integrations

A leading UK technology firm is searching for a Backend Engineer to develop systems ensuring the usability of advanced AI in mission-critical environments. Candidates should possess over 5 years of experience in backend development using Python and have experience with Palantir Foundry. This role offers a hybrid ...

Remote Backend Engineer & AI Trainer

A leading technology consulting firm is seeking a Backend Engineering Specialist – AI Trainer to shape the evolution of AI tools. You will utilize your backend expertise to enhance AI systems and train models, collaborating in a remote environment. The ideal candidate possesses strong skills in backend technolog ...

Backend Engineer AI Driven SaaS Security Platform

A cybersecurity company in Cheltenham is looking for a Backend Engineer to contribute to the development of backend systems for their core product. This role involves building APIs and backend services, with a focus on scalability and performance. Ideal candidates will have 2–4 years of experience in software en ...

Senior Backend Engineer — AI Powered Microservices & LLMs

Weekday AI is seeking a Senior Backend Engineer to build and scale intelligent backend systems for AI-driven applications in London. You'll design robust APIs, create scalable microservices, and integrate advanced AI capabilities like Large Language Models. Collaborating with cross-functional teams, you'll focus ...

Backend Engineer, AI Platform — Build Scalable AI Tools

A tech company in Greater London is looking for a talented Backend Engineer to join their AI Platform team. The role involves designing and developing backend services for AI capabilities, ensuring reliability and scalability. Ideal candidates will have over 4 years of experience in backend engineering, particul ...

Backend Engineer Fintech APIs & Scalable Systems (Remote)

Caledonia Financial in Edinburgh is hiring backend engineers to build and maintain their core platform. You'll collaborate with product managers, frontend developers, and the engineering team to create reliable backend services and APIs. Ideal candidates have 3+ years in backend engineering, knowledge of languag ...

Senior Java Microservices Developer

India - Remote Posted: 16/03/2026 Salary: $0.00 to $100.00 per Day ID: 37189_BH Apply OR Senior Java Microservices DeveloperLocation: India | RemoteContract: Initial 6-month contract with strong likelihood of extensi ...

Senior Java Microservices Developer

India - Remote Posted: 16/03/2026 Salary: $0.00 to $100.00 per Day ID: 37189_BH Apply OR Senior Java Microservices DeveloperLocation: India | RemoteContract: Initial 6-month contract with strong likelihood of extensi ...

Senior Web Services Engineer

Contract Senior Web Services Engineer📅 3-6 Month Contract💵 Hourly Rate in USD – Negotiable🌍 Fully Remote – Open to candidates worldwideWe are seeking a Senior Web Services Engineer to join on a contract basis, working remotely with a globally distributed t ...

Senior Web Services Engineer

Contract Senior Web Services Engineer📅 3-6 Month Contract💵 Hourly Rate in USD – Negotiable🌍 Fully Remote – Open to candidates worldwideWe are seeking a Senior Web Services Engineer to join on a contract basis, working remotely with a globally distributed t ...

Lead Software Engineer

Role: Lead Python Engineer (Hands-on Team Lead) Location: London – Hybrid (3 days office / 2 days WFH) Salary: Up to130k base Industry: Fintech Platform We’re working with a profitable, <stro ...

Senior Software Engineer

Role: Lead Python Engineer (Hands-on Team Lead) Location: London – Hybrid (3 days office / 2 days WFH) Salary: Up to 130k base Industry: Fintech Platform We’re working with a profitable, <str ...

Staff Platform Engineer – Platform Engineering (UK & Ireland)

Overview Fanatics Betting & Gaming (FBG) is seeking a Staff Platform Engineer to join our Platform Engineering team based in the UK or Ireland. This position plays a critical role within the EMEA Platform Engineering organization, partnering closely with teams across the UK, Ireland, and U ...

Senior Backend Engineer – Free to Play Games (Remote)

Midnite is looking for a Senior Backend Engineer to manage backend systems for an ambitious suite of free-to-play games. The role is remote in the UK, offering a salary between £90,000 and £110,000. Responsibilities include building and maintaining backend systems, constructing APIs, and ensuring code quality an ...

Senior Backend Data Engineer: Scalable Pipelines & Analytics

Gifftid is seeking a Senior Backend Data Engineer in the United Kingdom to design and build data infrastructure that powers its platform. This role requires over 5 years of experience in backend or data engineering, strong Python programming skills, and proficiency in SQL and data modeling. Responsibilities incl ...

Lead Software Engineer

Lead Python/AI Engineer Location: London. Salary: £110,000 plus benefits. Position Overview Lead Python/AI Engineer at a London start‑up building autonomous AI systems that run real-world operations. Responsibilities Lead a small team while working directly wit ...

Backend Software Engineer C# .Net Core

Get AI-powered advice on this job and more exclusive features. This range is provided by Client Server. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Client Server Senior ...

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    Backend Developer Python Nodejs Jobs in United Kingdom Job Search Guide, Trends and Insights