Backend Jobs in United Kingdom

Senior Backend Java Engineer - Payments/FinTech, Hybrid London

Cloud Cloud Native Java Microservices NoSQL +2 skills

Design, build, and operate cloud-native Java backend services for a payments-focused financial services company in London, working across product, architecture, and engineering. Core stack includes Spring Boot, microservices, and SQL/NoSQL databases.

IBM Computing

Backend Java Engineer - Cloud, CI/CD & APIs

IBM Consulting UK FutureNow is hiring a Backend Java Developer to design and build high-quality backend applications using Java/JEE and modern web technologies. Day to day involves building features, integrating systems, and applying DevOps practices and TDD, with BPSS/security vetting possible depending on the assignment.

Backend Java Developer - eDV Cleared

AI API Automation CI/CD Cloud +12 skills

IBM Consulting UK (FutureNow) is hiring a backend Java developer in Hursley to design, build, and maintain secure backend applications and services using Java/JEE, Spring, and web technologies, applying TDD, dependency injection, and CI/CD. The role requires UK pre-employment screening (BPSS) and potentially SC/DV security vetting.

BaseKit

Remote Backend PHP Developer

RemoteUK

Accessibility AI CI/CD Docker E-commerce +3 skills

Backend PHP developer building and maintaining BaseKit's white-label, no-code website builder platform: writing modern PHP with unit, functional and integration tests, working in Docker-based environments with CI/CD and AI-assisted development. Remote-first role with a minimum of 1 day per month in the Bristol office.

BaseKit

PHP Developer (Backend) - Remote or Hybrid

RemoteUK

Accessibility AI CI/CD Docker E-commerce +3 skills

Backend PHP developer at BaseKit, a white-label website-builder and small-business tools company. Day to day: writing modern PHP for a large codebase, adding unit/functional/integration tests in a CI/CD pipeline, working in Docker-based environments, and using AI-assisted development. Remote or hybrid, with at least 1 day per month in the Bristol office.

Randstad Technologies

Senior Java Backend Engineer | Microservices, Cloud, AI

Agile AI API CI/CD Distributed Systems +4 skills

Randstad Technologies is hiring a Senior Java Backend Engineer in Manchester to design and scale high-performance distributed systems, build microservices and REST APIs, and run modern CI/CD pipelines, while leading technical initiatives and mentoring engineers in an Agile environment using AI tools like Claude and Codex.

Academic Key

Senior Backend Engineer, AI Agents Platform

A senior backend engineer at Lightning AI (the company behind PyTorch Lightning) designs and builds backend services that orchestrate and deploy AI agents in production, covering scalable APIs, memory/state management, and long-running workflows. The role is London-based, hybrid with at least 2 days/week in office.

Senior Backend Engineer - Crypto Custody & Infra

AWS Blockchain Docker Infrastructure as Code Kubernetes

Senior Backend Engineer at Robinhood owning AWS-based crypto custody infrastructure, blockchain node operations, and wallet management services. The work centers on automating deployments with IaC, running containerized workloads on Kubernetes/Docker, integrating third-party custodians, and handling security, incident response, and on-call from the London office.

Tether Operations Limited

Remote Senior Backend Developer - Node (100% Remote UK)

Agile Blockchain C++ Fintech JavaScript +6 skills

Senior Backend Developer at Tether building and scaling backend components for its stablecoin platform, with a focus on new features, scalability, and security. Work is 100% remote (UK) and centers on Node.js/JavaScript, microservices, and databases like MySQL and MongoDB.

Tether Operations Limited

Senior Backend Developer Node.js - Remote (m/w/d)

Agile Blockchain C++ JavaScript MongoDB +3 skills

Senior Backend Developer building Tether's backend components and core services for its stablecoin platform, with a strong focus on security. Day to day involves Node.js/JavaScript development, MySQL/MongoDB work, and blockchain integration on a fully remote team using agile practices.

Sponsor Finder

Senior Backend Engineer, Context Layer — Remote

North America, UKSenior

Builds and shapes backend services that harvest business context, govern it through a certification and versioning workflow, and serve it to users and AI agents across the platform. The role is full-stack with a strong preference for Java and backend work, including APIs and integrations for AI-powered features.

Agentic AI AI API Java

Tether Operations Limited

Senior Backend Developer - Node (Remote)

Agile Blockchain C++ JavaScript MongoDB +3 skills

Senior Backend Developer building Tether's backend components and core services with Node/JavaScript, databases (MySQL, MongoDB), and blockchain integration, following agile practices and high security standards. The role is remote-friendly, supporting a globally distributed team.

iwoca

Backend Engineer - Acquisition Technology

Agentic AI AI Analytics API Data Engineering +14 skills

Join iwoca, an SME lending fintech, as the first engineer on the German side of its Acquisition Tech team. You'll build and own the Python backend behind customer acquisition — data pipelines, REST APIs, HubSpot tooling and ML models in production that power paid ads, SEO, direct mail and outbound sales.

70K – 85K £

RaptorTech Recruitment Ltd

Remote PHP Laravel Developer – Greenfield Backend Impact

Agile JavaScript Laravel MongoDB MySQL +2 skills

A PHP developer joins a growing software business in Ipswich, UK, building greenfield back-end and web app functionality with PHP, Laravel, MySQL, MongoDB and JavaScript, focused on RESTful services and Agile practices. The role is remote-friendly, pays up to £40,000, and includes 25 days holiday plus bank holidays.

Remote Junior PHP Backend Engineer - Grow with AI

UKJunior

A junior backend developer joins Multis UK Limited to work on real production systems and online marketplace projects, building PHP and SQL backends and REST APIs while using AI-assisted coding tools. The role is remote and comes with mentorship from senior developers, with room to grow into more independent work.

Remote NodeJS Backend Engineer (12-Month Contract)

UKContract

CI/CD Jest Kafka Microservices Node.js +5 skills

12-month contract backend engineer building Node.js/TypeScript services for a fast-growing SaaS company, mostly remote with one day in the Berkshire office to collect equipment. Day-to-day: owning backend features end-to-end across NestJS microservices, RabbitMQ/Kafka queues, Jest testing, CI/CD, and SQL/NoSQL databases.

Multis Uk Limited

Junior Backend Developer (PHP)

UKPart-timeJunior

AI API Azure Cloud Docker +11 skills

Junior backend developer building and maintaining PHP/SQL-based production systems and online marketplace projects: REST APIs, database work, integrations, and bug fixing, with mentorship from senior developers and use of modern AI coding tools. Fully remote role.

Nicoll Curtin

Senior Python Backend Engineer

AI Anthropic Cloud Docker Kubernetes +7 skills

Senior Python backend engineer joining a small UK team building a new AI product for real-world tasks and workflows. The role designs and operates the backend layer connecting LLMs to the product — inference pipelines, orchestration, and APIs — with focus on latency, throughput, reliability, and scaling. Remote-first within the UK; £68k–£108k plus equity.

68K – 108K £

Michael Page International

Senior Backend Engineer

Senior backend engineer at a technology-led financial services company in Central London, architecting and operating large-scale distributed systems that handle 20,000-30,000+ requests per second. Day to day involves system design, event-driven architecture, performance optimization, end-to-end ownership of services, and evaluating emerging AI-driven capabilities.

Backend Software Engineer C#/.NET AWS

AI API AWS Cloud C# +4 skills

Backend engineer rebuilding a corporate payments platform using C#/.NET Core, SQL, microservices/event-driven architecture on AWS. Day to day: design and ship APIs and backend services in a small autonomous team, modernise legacy services, mentor engineers, and use AI tools like Claude and GitHub Copilot. Hybrid: mostly home working with two office days a week (Bracknell).

40K – 70K £