Backend Jobs in United Kingdom

There are 2,818 open Backend jobs in United Kingdom on freehire right now. 583 of them were posted recently. The skills employers ask for most often are api, cloud and java.

Salary

CurrencyPeriod25thMedian75thPostings
GBPyear£75,000£95,000£110,000215
USDyear$130,000$157,500$201,25015

From postings that disclose pay. Currencies are counted separately, never converted.

Most requested skills

  • api 38%
  • cloud 29%
  • java 28%
  • ai 26%
  • aws 24%
  • python 24%
  • microservices 18%
  • ci-cd 17%

How the work is done

  • Hybrid 513 · 18%
  • Remote 282 · 10%
  • Onsite 35 · 1%

Visa sponsorship offered in 53% of the 148 postings that state a position on it.

Seniority

  • Senior 1,261
  • Lead 192
  • Staff 131
  • Middle 70
  • Junior 45
  • Principal 38

Who is hiring

  • 1000+ employees 239
  • 501-1000 employees 140
  • 51-200 employees 126
  • 11-50 employees 73
  • 201-500 employees 20
  • 1-10 employees 8
2,818 jobs
Upwind Security
1 hour ago

Backend Software Engineer

HybridUK
United Kingdom

Backend Software Engineer at Upwind Security developing cloud security platform using Golang/Java with technologies like Kubernetes, Neo4j, ElasticSearch, Redis, and working with major cloud providers (AWS, GCP, Azure).

api api-security aws azure ci-cd +14 skills
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Roku
4 hours ago

Senior Backend Engineer — Distributed Systems (Streaming Platform)

Open 75d HybridUKSenior H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
United Kingdom

Senior backend engineer building scalable streaming services in Java/Python on AWS, optimizing discovery and browse platforms for Roku’s TV streaming ecosystem.

agentic-ai agile ai automation aws +8 skills
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On
5 hours ago

Lead Backend Engineer – POS Platforms Integration

Open 61d UKFull-timeLead
United Kingdom

Lead a backend team building and integrating POS systems with ERP, OMS, CRM, and loyalty platforms using Node.js, TypeScript, and cloud-native tools to ensure seamless retail operations.

api authentication automation aws azure +24 skills
90 000 – 120 000 £
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Apollo Research
6 hours ago

Senior Backend Engineer

UKSenior
United Kingdom

Apollo Research is hiring a Senior Backend Engineer to build infrastructure, orchestration tools, and data pipelines for conducting safety experiments on frontier AI models. The role involves collaborating with researchers to automate experiments and analyze model behavior in a high-impact AI safety environment.

ai mcp openai python
135 000 – 270 000 $
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Addepar
7 hours ago

Staff Backend Software Engineer

UKStaff H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
United Kingdom

The Staff Backend Software Engineer will lead the design and implementation of critical API services for Addepar's financial data platform in Edinburgh. The role focuses on scaling distributed systems, modernizing architecture for European expansion, and mentoring engineering teams using Java, SQL, and AWS.

ai api api-design aws design-patterns +4 skills
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GitLab Backed by Y Combinator
8 hours ago

Staff Backend Engineer, Developer Experience

Open 80d RemoteNorth America, UKFull-timeStaff H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.

Build and improve GitLab’s internal developer tools and testing infrastructure using Ruby and Go, reducing friction in CI/CD pipelines and shaping engineering culture across globally distributed teams.

ai ci-cd developer-experience devops devsecops +2 skills
131 600 – 282 000 $
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GitLab Backed by Y Combinator
8 hours ago

Staff Backend Engineer (Ruby on Rails/AI), Verify

Open 80d RemoteUKFull-timeStaff H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
United Kingdom

Build and scale GitLab’s CI backend and integrate AI agents into CI/CD workflows, improving performance, reliability, and observability for millions of jobs.

agentic-ai ai automation ci-cd data-modeling +8 skills
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GitLab Backed by Y Combinator
8 hours ago

Senior Backend Engineer (Ruby), AI Engineering: AI Coding

Open 48d RemoteUKFull-timeSenior H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
United Kingdom

Senior backend engineer builds and maintains GitLab's event and trigger system that links development lifecycle events to AI-powered workflows, using Ruby on Rails and integrating with third-party tools.

agentic-ai ai ci-cd devsecops gitlab +6 skills
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GitLab Backed by Y Combinator
8 hours ago

Senior Backend Engineer, Deployment Environments

Open 41d RemoteNorth America, UKFull-timeSenior H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.

Senior Backend Engineer at GitLab designs and improves cloud-native deployment guidance and ephemeral environments to make GitLab easier to deploy and validate across environments.

ai cloud cloud-native devsecops gitlab +1 skills
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GitLab Backed by Y Combinator
8 hours ago

Senior Backend Engineer, AI Engineering: Chat

Open 40d RemoteNorth America, UKFull-timeSenior H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.

Builds and maintains the backend AI infrastructure for GitLab Duo Chat, integrating large language models and multi-agent flows using Python, LangGraph, and Ruby on Rails to power secure, agentic chat experiences.

agentic-ai ai api data-modeling devsecops +13 skills
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GitLab Backed by Y Combinator
8 hours ago

Senior Backend Engineer (Ruby), AI Engineering: DAP Repository Flows

Open 23d RemoteUKFull-timeSenior H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
United Kingdom

Build AI-powered autonomous agents in Ruby on Rails that operate on customer codebases, streamlining onboarding and background flows for GitLab’s Duo Agent Platform.

agentic-ai ai automation devsecops gitlab +4 skills
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GitLab Backed by Y Combinator
8 hours ago

Senior Backend Engineer (Ruby), Plan: Spec-Driven Development

Open 19d RemoteUKFull-timeSenior H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
United Kingdom

Build backend systems for GitLab’s AI-driven intent-to-code workflows using Ruby on Rails, Python, PostgreSQL, and LLM APIs to turn user intent into verified, mergeable code.

agentic-ai ai api devsecops gitlab +5 skills
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GitLab Backed by Y Combinator
8 hours ago

Senior Backend Engineer (Go), Tenant Scale: Gitaly

RemoteUKFull-timeSenior H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
United Kingdom

Build GitLab’s Git data storage tier (Gitaly) using Go, focusing on distributed storage, repository management, and performance for self-managed and Dedicated customers.

ai api automation devsecops git +4 skills
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GitLab Backed by Y Combinator
8 hours ago

Senior Backend Engineer (Ruby), AI Catalog: External Agents

RemoteUKFull-timeSenior H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.
United Kingdom

Senior Backend Engineer on GitLab's External Agents team building integrations that connect GitLab agents with tools like Slack and external AI solutions such as Claude Code, using Ruby on Rails, PostgreSQL, and GraphQL/REST APIs in a monolith backend.

agentic-ai ai api backbone claude-code +13 skills
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Jack & Jill
15 hours ago

C++ Backend Engineer for AI Metal 3D Printing

UK
United Kingdom

Build the high-performance C++ backend core of an AI platform for metal 3D printing, handling high-rate sensor data ingestion, ML inference integration, and complex 3D geometry processing for aerospace/medical applications.

ai cpp machine-learning
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Gravitas Recruitment Group (Global) Ltd
15 hours ago

Senior Python Backend Engineer (Remote) - Python+Rust/Java

RemoteUKContractSenior
United Kingdom

Senior Python Backend Engineer on a 12-month contract leading the modernization of high-performance backend services, decommissioning Rails components and migrating data models using Python alongside Rust, Java, or Ruby.

java python rails ruby rust
650 – 650 £ / day
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Corevia Search
15 hours ago

Backend Engineer – AI Scaleup, London (Equity + Bonus)

On-siteUK
United Kingdom

Backend Engineer building scalable backend services, APIs, and distributed systems on cloud infrastructure in an on-site London role using Golang or similar backend languages.

api cloud distributed-systems go
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Bloc Recruitment
15 hours ago

Senior Backend Engineer — AI-Powered Private Markets Remote

UKSenior
United Kingdom

Senior Backend Engineer owning production Python/FastAPI services with Postgres and ClickHouse for an AI-powered private markets data intelligence platform, while mentoring a growing European engineering team.

ai clickhouse fastapi postgresql python
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Hunter Selection Ltd
15 hours ago

Backend .NET Developer | API & C# Expert

UK
United Kingdom

A .NET Developer building backend services and APIs within an Agile team for major UK clients, working with .NET and cloud technologies in South Bristol.

agile api cloud dotnet
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Digital Waffle
15 hours ago

Lead Backend Engineer (C++, AI) - Hybrid

UKLead
United Kingdom

Lead Backend Engineer owning the backend of Digital Waffle's platform, requiring deep C++ expertise, architecture mindset, mentoring, and focus on AI-powered development, collaborating with Product, Front End, and R&D teams in a hybrid role.

ai cpp
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