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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 Backend Engineer — Cloud Security & Scale

A leading recruiting agency is seeking a Senior Software Engineer (Backend) for a fast-growing cybersecurity firm in Belfast. In this role, you will own the full lifecycle of backend projects, collaborate closely with cross-functional teams, and drive technical decisions. Ideal candidates will have at least 1 ye ...

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 Financial Systems & vIBANs

A financial technology company in London seeks a Senior / Lead Engineer to build a robust collections and treasury foundation. This role involves leading architectural decisions, collaborating with PMs, and ensuring high engineering quality in financial systems. Ideal candidates should have experience in deliver ...

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 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. ...

AI Driven Backend Engineer – FinTech & Scale

A leading technology platform in the United Kingdom is seeking a Software Development Engineer to develop high-quality software solutions for investment analysis. Ideal candidates will have 4+ years of Java programming experience, strong problem-solving skills, and familiarity with financial markets. The role fo ...

Rust Backend Engineer Fintech Platform, PostgreSQL

A leading fintech SaaS company is seeking a Software Engineer specializing in Rust to join their team in London. In this role, you will design and build high-performance backend services, leveraging your skills in Rust and PostgreSQL to contribute to critical financial infrastructure. The ideal candidate will ha ...

VP Backend Engineer High Touch Trading

A leading technology firm in London is seeking talented software engineers to join their front office trading technology team. The role involves building server-side systems that drive trading workflows used by internal traders and external counterparties. The ideal candidate will have over 10 years of software ...

Senior Backend Engineer — Scale Node.js Systems

A dynamic startup in Greater London is looking for a Backend Engineer with strong Node.js expertise to help transition from Java to Node.js and build scalable backend services. The ideal candidate will have a Bachelor's degree in Computer Science and solid experience with PostgreSQL and RESTful APIs. Responsibil ...

Backend Engineer: Golang + AI Driven Ownership

A dynamic tech company in Greater London is looking for a Backend Engineer to join the Promotions team. This role emphasizes backend expertise, particularly in Golang, and the ability to take ownership of complex initiatives in ambiguous settings. Successful candidates will demonstrate strong stakeholder managem ...

Senior Backend Engineer Scalable AI Systems

A pioneering technology start-up is seeking a Senior Backend Engineer to build and scale its innovative software infrastructure in London. The successful candidate will be responsible for designing robust web applications and managing cloud-based infrastructures on Azure. Essential skills include expertise in Ku ...

Finance Backend Engineer Cloud, APIs & Microservices

A technology solutions provider is seeking a Software Engineer for Finance to design and maintain backend systems and APIs. The ideal candidate will have over 3 years of experience in backend development, particularly in cloud environments such as AWS. Responsibilities include developing scalable services, worki ...

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 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 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 ...

Backend Engineer — Event Driven Ecommerce Integrations

A leading recruitment agency is seeking a Backend Engineer for a greenfield replatforming project for a well-known retail brand in Desborough, United Kingdom. The role focuses on designing and developing event-driven integrations for a new ecommerce ecosystem using Node.js and AWS. Candidates should have a solid ...

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: 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 ...

Finance Backend Engineer Cloud, APIs & Microservices

A leading technology solutions provider in the United Kingdom is seeking a Software Engineer for Finance to design and support backend systems critical to financial workflows. The ideal candidate will have at least three years of experience developing backend applications and APIs, especially within cloud enviro ...

Principal Backend Engineer – Java, Hybrid London

A leading Fintech disruptor in Greater London is seeking a Principal Backend Engineer to lead architectural design and hands-on development. This role is crucial for driving the technical roadmap and mentoring the engineering team. The ideal candidate will work on greenfield projects, building scalable microserv ...

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 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 ...

Senior Java Backend Engineer – Spring Microservices

A global financial services company is seeking a highly skilled Senior Java Developer to join our engineering team in Northern Ireland, Belfast. This role involves designing, developing, and maintaining robust applications using modern Java technologies. The ideal candidate will contribute to the entire product ...

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 ...

Geospatial Backend Lead Engineer Hybrid (UK)

A leading iGaming company is searching for a Lead Software Engineer to build and scale its core platform services in Newcastle upon Tyne. This hybrid role requires expertise in Java and geospatial-specific skills. The successful candidate will provide technical leadership, ensure system scalability, and mentor e ...

Senior Software Engineer — Backend & Platform Architect

A leading sports and gaming marketing company in Greater London is seeking a Senior Software Engineer to enhance their product and engineering capabilities. The ideal candidate will focus on backend services and the integration of applications and data. Responsibilities include leading technical roadmaps, mentor ...

Backend Engineer – Cloud & Distributed Systems (Equity)

A stealth-mode AI laboratory in London is seeking a Software Engineer to design and develop backend infrastructure for Machine Learning workloads. The ideal candidate has 2-3 years of experience in back-end engineering, and proficiency in cloud-native technologies like AWS and Terraform. This role offers a compe ...

Senior Backend Engineer (Kotlin/GCP) Remote

A leading global consumer technology company is looking for a Senior Backend Engineer to design and build scalable backend services using Kotlin and Google Cloud Platform. The ideal candidate will thrive in ambiguous situations and have strong communication skills. Responsibilities include operating backend serv ...

Backend Engineer: Medical Imaging & Health APIs

Your role at V7: Own and maintain backend infrastructure and processes dealing with the input, output, and consumption of both radiological and pathological medical imaging scans. Build out infrastructure for import/export of annotations to standard medical imaging formats like DICOM SEG/ ...

Senior Backend Engineer, Fintech & Blockchain Platform

A scaling fintech company in Northern Ireland is seeking a Software Engineer to design and build high-performing solutions for the future of investment banking. The ideal candidate will have over 5 years of experience, strong backend coding skills, and familiarity with RESTful APIs in an Agile environment. Join ...

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