26,989 Backend jobs
Server-side engineering roles — APIs, services, databases and backend systems.
Senior Backend Engineer – Lead Complex Systems (Remote UK)
Senior Staff Engineer at Monzo providing hands-on engineering leadership across multiple UK-based squads: shaping technical and product direction, leading architectural decisions, and mentoring senior engineers while delivering scalable backend systems. Based in Cardiff, London, or remote.
Staff Backend Engineer - Remote UK | Equity
Monzo is hiring a Staff Backend Engineer based in Cardiff, London or remote within the UK, to build scalable backend services and resilient distributed systems alongside cross-functional teams. Core stack includes Go/Java/C/Scala with Kubernetes, Docker, Kafka and AWS; equity is offered.
Remote Staff Backend Engineer, Developer Experience
Staff backend engineer on GitLab's Developer Experience group, scaling developer tooling and internal platforms across a globally distributed team. Day to day splits between hands-on Ruby/Go coding and designing scalable, reliable Kubernetes workflows to improve engineering productivity and platform usability.
Staff Backend Engineer - Remote with Equity
Staff Backend Engineer (L60) at Monzo building scalable backend services in a product-focused environment, working with Go, Cassandra, Kafka, Kubernetes, Docker and AWS. Role offers flexible location and hours across the UK, with equity and relocation support.
Senior Python Backend Engineer, FinTech & Microservices
Hunter Bond seeks a Senior Python Backend Engineer in London (on-site) to design, build, and maintain production-grade services for sophisticated financial platforms, tackling concurrency and scalability challenges alongside engineers and financial specialists. Core stack: Python, SQL, microservices, distributed systems.
Senior Backend Engineer, Clinical Automation – London Equity
Senior Backend Engineer (onsite, London) at Asterix Health building DoctorOS, an AI platform that augments clinicians. The role owns bots, data pipelines and backend services for clinical automation, ensuring safety and auditability and integrating with NHS GP systems, choosing between low-code RPA and code-first automation.
Senior Backend Engineer - Clinical Automation (Rpa)
Senior backend engineer who owns the automation layer connecting NHS GP systems (EMIS Web, SystmOne, Docman) to Asterix Health's DoctorOS clinical AI platform — building Python backend services and AWS/Supabase data pipelines, running and evolving RPA bots (UiPath/Playwright), and ensuring clinical safety and reliability. Onsite in Shoreditch, London.
Enterprise Java Backend Engineer | Hybrid London
SoftwareSearch is hiring a Java consultant on a hybrid, fixed-term contract in London to design and build enterprise-grade Java backends and REST APIs for client projects in regulated environments, working hands-on and collaborating closely with client teams and stakeholders.
Senior Backend Engineer
Senior backend engineer on Teya's ePOS team, building and owning a critical backend service for merchants across Europe — designing, developing and operating scalable, well-tested Java/Spring Boot microservices with Kafka, while mentoring other engineers and raising team standards.
Backend engineer for beauty and wellness businesses
Staff Backend Engineer at Fresha, an AI-powered operating system for beauty and wellness businesses, based in London. A heavily hands-on technical leadership role: owning architecture for a tribe, delivering cross-team initiatives, and driving stability, performance and scalability during a migration to microservices, with serverless, SQS, CI/CD and AI-augmented engineering workflows.
Senior Software Engineer (Java Backend)
Designs and maintains high-performance Java backend services and REST APIs for BarkleyOKRP's cross-channel advertising management tools, optimizing SQL/MySQL queries for high-throughput paid search, social, and retail media data. Remote role; GCP, BigQuery/dbt, and AI coding tools are pluses.
Senior Software Engineer (Java Backend)
We're looking for a Senior Software Engineer to join our engineering team building cross-channel management tools that turn massive, complex data streams into impactful actions across paid search, social, and retail…
Senior Backend Developer (Java/Kotlin) — REST & Microservices
Senior backend developer at Sysmatch, a Lisbon-based IT consultancy and outsourcing firm, building scalable RESTful APIs and microservices in Java and Kotlin using Clean Architecture for client projects. Day to day involves coding, code reviews, and cross-team collaboration.
Backend developer java & kotlin
Sysmatch, a Portuguese IT consultancy and outsourcing company, is hiring a backend developer with 5–8 years of experience to work on a project for an international client. The role centers on backend development in Java and Kotlin, including REST APIs, microservices, and clean architecture practices.
Desarrollador/a Backend (Node.js, TypeScript & IA Conversacional)
Backend engineer at a tech scale-up building AI-powered customer experience solutions in Madrid (hybrid). Day to day: design scalable Node.js/TypeScript services (NestJS/Express), build robust REST APIs, and integrate conversational AI (LLMs, RAG, agents) with SQL databases, Docker/Kubernetes, CI/CD, and public cloud.
Desarrollador Backend Senior Java/Spring Boot con Beneficios
Senior Java backend developer at Kairos Digital Solutions' Pamplona office, developing and maintaining banking and investment platforms using Spring Boot, microservices, and relational databases. Permanent contract with growth opportunities in the financial sector.
Backend Engineer (Ruby), Create: Change Record
Backend engineer on GitLab's Change Record team, building a trustworthy record of code changes (for humans and AI agents) into GitLab's source code platform using Ruby on Rails and GraphQL. Day to day involves shipping features, tuning performance and reliability of a critical system, Tier 2 on-call, and async collaboration across teams.