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Senior Backend Engineer Fintech Leadership & Scale

A leading fintech company in Greater London is looking for a Senior Backend Software Engineer to lead the delivery of complex software features. The ideal candidate should possess strong problem-solving skills and experience in mentorship, as well as proficiency in TypeScript, Node.js, and PostgreSQL. This role ...

Senior Backend Engineer AI Driven Marketplace

A leading fashion tech startup in London is seeking a Senior Backend Software Engineer to architect transaction systems for their AI-native secondhand fashion marketplace. You'll work on scalable systems integrating AI models into ecommerce, impacting the $350B industry. The ideal candidate has 3–6 years of expe ...

Senior Rust Backend Engineer, Blockchain Platform

A leading blockchain platform in Greater London is seeking a backend engineer to design and implement high-throughput services using Rust and TypeScript. You will integrate existing systems with new blockchains and maintain systems processing over 1.2 billion operations daily. The ideal candidate has over 5 year ...

Senior Software Engineer, Backend Services & APIs

Senior Software Engineer, Backend Services & APIs LONDON, United Kingdom Job Info Job Identification 22521 Job Category Software Development Posting Date 03/31/2026, 09:15 AM Locations LONDON, United Kingdom Job Schedule Full time </ ...

Java Backend Engineer – Cloud, Microservices, Hybrid

A leading financial technology firm in Manchester is seeking a Software Engineer to join their Engine team. You will contribute to innovative platforms and internal tools, focusing on building features from the ground up. The ideal candidate should have a strong coding background in Java and a willingness to lea ...

Senior Backend Engineer — Scalable APIs & Services

A leading cybersecurity company is seeking a Senior Software Engineer to develop server-side applications and APIs for their FortiDLP platform. This role involves implementing new functionalities, maintaining existing features, and ensuring code quality. Candidates should have 3-5 years of experience in software ...

Senior Backend Engineer – Fintech Microservices Lead

A fintech SaaS company is seeking a Senior Back-end Engineer to join its high-growth team in London. This role involves leading the design of scalable microservices and developing RESTful APIs using Java 21 and Spring Boot. The ideal candidate will have over 7 years of back-end development experience with a soli ...

Senior Software Engineer, Backend Services & APIs

Senior Software Engineer, Backend Services & APIs LONDON, United Kingdom Job Info Job Identification 22521 Job Category Software Development Posting Date 03/31/2026, 09:15 AM Locations LONDON, United Kingdom Job Schedule Full time </ ...

Senior Backend Engineer: Node.js & Scalable APIs

A leading tech startup in the UK is looking for a Backend Engineer with strong Node.js programming skills to develop scalable backend services. Responsibilities include designing and maintaining RESTful APIs, optimizing database performance, and collaborating with cross-functional teams. The ideal candidate hold ...

Backend Software Engineer — Payments Platform (Hybrid)

A leading vacation rentals company in Greater Manchester seeks a passionate Software Engineer for its Payments Team. You will design and build services for transaction processing and contribute to the architecture of payment solutions. The ideal candidate will have experience in AWS services, API development, an ...

Java Backend Engineer Production Reliability & Debugging

A technology services company in the UK is seeking a 3rd Line Back End Developer. This role involves investigating and resolving live system defects, developing and deploying fixes using Java, and collaborating with other teams to improve stability. The ideal candidate should have experience in supporting produc ...

Senior Backend & Platform Engineer, Cloud Infra

A leading technology company in London is seeking a Senior Software Engineer to design and build backend services that power its systems. In this hybrid role, you will collaborate with teams to develop production-grade services, maintain CI/CD systems, and manage AWS infrastructure. Candidates should have strong ...

Senior Java Backend Engineer Cloud Security

Join an innovative startup in the cloud security sector as a Java/Golang Engineer, where you'll develop groundbreaking products and tackle complex engineering challenges. With a dynamic and collaborative work environment, this is your chance to be part of a rapidly growing company that values creativity and inno ...

Backend Software Engineer Sports Data & APIs

A leading sports data and analytics company is seeking a Software Engineer (Backend) to transform large datasets into engaging insights for data-driven decisions in sports. This role involves developing and deploying APIs, managing databases, and building ETL pipelines. The ideal candidate should have at least 3 ...

Payments Backend Engineer: Scale Global Subscriptions

A leading technology company in Greater London is seeking an experienced back-end developer for the Payments Team. You will build scalable software solutions to enhance user experience across Proton's products. Ideal candidates will have a strong background in back-end development, experience with PHP/Symfony, S ...

Payments Backend Engineer Fintech APIs (Hybrid)

A rapidly scaling fintech is seeking a Software Engineer with extensive experience in payments. This role involves designing and building scalable APIs and backend systems, collaborating across teams, and contributing to system design for financial infrastructure. The ideal candidate has proven payments experien ...

Java Backend Engineer – Incident Response & Reliability

A technology solutions firm in Greater London seeks a skilled 3rd Line Back End Developer to tackle complex issues in live systems. The role requires a strong background in Java and server environments, with responsibilities that include diagnosing defects, developing solutions, and collaborating with various te ...

Senior Backend Engineer, Games APIs & Tools

We want you to #JOINTHEREBELLION!For 30 years we've been independently developing and publishing incredible video games at our multiple studios founded by Jason & Chris Kingsley, but Rebellion is more than just games. We have our own film studio, we create board games, publish books, and ...

Senior Backend Engineer AI Infrastructure & Scale

An innovative AI company in Greater London seeks a skilled Senior Software Engineer to own significant architectural decisions. You'll develop resilient systems that support autonomous AI agents, ensuring reliability and rapid deployment. Ideal candidates will have extensive experience in production software dev ...

Java Backend Engineer Hybrid (London/Bristol)

A leading IT consultancy in the UK is seeking a Java Backend Engineer to build and maintain backend components for modern digital services. This role offers the chance to work with technologies like Java 8+, Spring Boot, and microservices in a collaborative, Agile environment. Ideal candidates will have strong e ...

Senior Backend Engineer, Remote — Adaptive Telemetry

A leading observability platform is hiring a Staff Backend Engineer for Adaptive Telemetry. In this remote role, you will drive technical strategies, ensure system reliability, and mentor engineers. Preferred candidates will have experience in distributed systems and cloud-native architectures, and proficiency i ...

Senior Backend Engineer Contacts Platform (Java)

A global technology company is seeking a Senior Software Engineer II for the Contacts Team in Greater London. The role involves driving technical solutions for recipient management in a collaborative agile environment. Candidates should possess strong Java experience and a proven record with distributed systems. ...

Backend Engineer Global Payments & Tax Infrastructure

A fintech startup in Greater London is looking for a Backend Engineer to build complex financial infrastructure from scratch. You will implement payment flows, create tax engines, and develop systems for international commerce. Ideal candidates will have experience with JVM-based languages, particularly Kotlin, ...

Platform Engineer (C#) Own & Impactful Backend

A leading online bingo platform in Sunderland is seeking a developer with 2-3 years of experience. You will contribute to platform codebases, participate in agile processes, and collaborate with teams. Strong C# skills are essential, along with a good understanding of testing methodologies. This role offers auto ...

Cloud Java Backend Engineer – Data Security

A leading global financial institution is seeking a Mid-level Java Developer in Belfast. This role involves designing, developing, and implementing microservice applications primarily in Java and Spring Boot. Candidates should have strong experience in a fast-paced environment focusing on automation and cost red ...

Remote Ready Backend Engineer Scale & Impact

A leading motor insurance provider in London is looking for a Software Engineer to join their engineering teams. You will be responsible for architecting scalable solutions, collaborating with stakeholders, and ensuring code quality. The ideal candidate has extensive backend development experience, strong commun ...

Senior Backend Engineer (Palantir Foundry Experience)

A NOTE FROM THE FOUNDERS Oxford Dynamics is at an inflection point. We operate in some of the most complex and high‑stakes environments in the world - defence, national security, AI and robotics. The decisions we make now will define not just how fast we grow, but who we become. You ...

Senior Backend Engineer — REST APIs & Microservices

A leading technology company in the United Kingdom is seeking a Software Engineer to develop robust back-end services and applications. The role involves building and integrating RESTful APIs, enhancing scalable systems, and implementing CI/CD pipelines. Candidates should have strong proficiency in Java, Python, ...

Senior Backend Software Engineer at Joinfleek.com

This job is brought to you by Jobs/Redefined, the UK's leading over-50s age inclusive jobs board. This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers. She will pick the best candidates from Jack's network. The next step is to speak to Jack. ...

Staff Backend Engineer | Go Microservices & Scale

A tech-focused company in Greater London is hiring a Staff Backend Engineer to take a leadership role in their engineering team. In this position, you'll tackle complex technical problems, influence the architecture of their backend stack, and guide engineering decisions. Ideal candidates have over 10 years of e ...

Staff Backend Architect – AI Driven Platform

A tech company specializing in AI-driven solutions is hiring a Staff Backend Engineer to take on technical leadership and shape the backend architecture. This role demands extensive experience in software engineering, particularly with distributed systems and microservices. The candidate will mentor engineers, d ...

Data Security Backend Engineer Java Citi

Job Overview Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries, operate at a scale few can match, and build systems that matter. The Mid‑l ...

Backend Engineer (Fintech) Scalable Banking Infra

A fintech company in London is seeking a Backend Engineer to enhance their financial infrastructure. You will design and implement robust systems, ensuring compliance and security in a fast-paced environment. This entry-level role offers an opportunity to contribute to impactful projects in a dynamic team. Candi ...

Senior Java Backend Engineer – Multithreading & Caching

Senior Java Developer - Multithreading/caching - sought by leading investment bank based in London - Contract *inside IR35 - umbrella* Key Responsibilities Develop and maintain high‑performance backend services for complex dat ...

Backend Engineer, Crypto Trading (Hybrid London)

A leading technology company in London is seeking a Software Engineer to design and maintain backend services for crypto trading. This role requires expertise in Go, Java, C++, C#, or Python, and offers a hybrid work environment. Ideal candidates will have problem-solving skills and a proactive mindset, along wi ...

Senior Backend Engineer, Data Lakehouse & Onboarding

A global data and AI platform is seeking an experienced backend software engineer to join their Platform Integrations team in Edinburgh. The role focuses on building robust client onboarding solutions, allowing clients to centralize and analyze their data effectively. Candidates should have extensive experience ...

Senior Go Backend Engineer — Scale Microservices

A leading technology firm in Greater London is looking for a Senior Backend Engineer to take technical ownership of key product areas. You will architect and build resilient Go services, mentor junior engineers, and lead initiatives that scale the platform to millions of users. Ideal candidates have experience w ...

Hybrid Java Backend Engineer | Spring, Microservices

A leading technology-focused organization is seeking skilled Java Software Engineers in Newcastle upon Tyne. You'll design and build scalable Java applications in an Agile environment, while also mentoring junior staff. The ideal candidate has significant experience with Java 8+, Spring, and strong collaboration ...

Backend Software Engineer Portfolio Data Workflows

Overview Addepar is a global data and AI platform empowering investment professionals to turn complex financial information into actionable intelligence. Addepar unifies portfolio, market and client data in a total portfolio view and delivers AI-powered insights within investment and client workfl ...

Go Backend Engineer DV Clearance Eligible

A leading engineering firm in Romsey seeks a skilled Backend Software Engineer to develop mission-critical solutions for National Security. You'll design, develop, and maintain high-speed software components using modern programming languages like Go. Strong DevOps skills, particularly in Docker and Kubernetes, ...

Backend Engineer, Data Platform — Hybrid (London)

A leading streaming service is looking for a Data Engineer based in London to enhance their data processing capabilities. The role involves collaborating on scalable infrastructure and designing tools to improve efficiency. Candidates should have experience in backend systems using Java and familiarity with dist ...

Backend Engineer, Portfolio Data & APIs (EU)

A global data and AI platform is seeking a Backend Software Engineer to join their team in Edinburgh. This role involves maintaining and evolving critical API services supporting their financial data ecosystem and modernizing architecture for European markets. The candidate will build scalable solutions, enhance ...

Sr. Backend Software Engineer Platform Integration

Who We Are Addepar is a global data and AI platform empowering investment professionals to turn complex financial information into actionable intelligence. Addepar unifies portfolio, market and client data in a total portfolio view and delivers AI-powered insights within investment and client wor ...

Senior Backend Engineer (Ruby on Rails)

About Wawa Fertility 17% of adults worldwide need help to have a baby - and by 2050, that number will reach nearly 50%. Yet only 2% can access fertility treatment today. That’s not a gap; it’s a canyon. And we’re building the bridge. London (Paddington) Hybrid (3 days in-o ...

Senior Backend Engineer—Java, Cloud Microservices

JPMorgan Chase is looking for a Software Engineer III to join their International Consumer Bank team in London. This role involves developing cutting-edge cloud-native applications while ensuring reliable and secure systems. Candidates should have a solid background in Java, cloud technologies, and a passion for ...

Senior Backend Engineer — AI Powered SaaS

A fast-growing tech company in the UK is looking for a Back-end Developer to work closely with the Product team and Data Scientists. The role involves designing and maintaining back-end services while ensuring high performance and reliability. The ideal candidate should have a degree in Computer Science, 3-5 yea ...

Java Backend Engineer Spring Boot & Microservices

A London-based trading company is seeking an experienced Java Engineer to join their technology team on an initial 6-month contract. The role focuses on backend development using Java and Spring Boot, building scalable services, and collaborating with various teams. Ideal candidates will have Java expertise, exp ...

Backend Engineer Remote, Scalable Systems & Impact

A circular fashion marketplace is seeking an experienced Backend Software Engineer to join their team in London. You will work with cross-functional teams, ensuring high-quality code is produced for over 1 million daily users. Responsibilities include designing solutions, collaborating with Product Managers and ...

Platform Engineer — AI Driven Backend & Pipelines

A tech startup is seeking a Software Engineer to build and maintain a shared platform that supports AI solutions. You will develop APIs, frameworks, and data services while collaborating with product engineers to enhance functionality. Candidates should have extensive experience in Python and AWS, alongside a st ...

Hybrid AWS Backend Engineer Golang/Java

A leading security technology company in Northern Ireland seeks a Backend Engineer to manage project lifecycles from design to deployment. The successful candidate will have at least 1 year of experience in Golang or Java, alongside knowledge of cloud platforms such as AWS or Azure. This role offers a hybrid wor ...

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