Backend Jobs in United Kingdom

AI API Node.js PostgreSQL Python +1 skills

SiaNTech is hiring a junior backend developer to build REST APIs, automations, third-party integrations, and AI tools using Python or Node.js with PostgreSQL, contributing to backend services on a small, fast-paced team.

Gazelle Global Consulting Limited

Backend Data / AWS Engineer

New HybridUKContract

API AWS CDK CI/CD CloudFormation +15 skills

Long-term contract role in London (hybrid, 2-3 days/week in office) owning a critical backend data layer: designing, securing and tuning NoSQL databases and building event-driven services on AWS (Lambda, API Gateway, SQS/SNS/EventBridge, Step Functions) using TypeScript/Node.js, Python or Java, with Terraform/CloudFormation/CDK and CloudWatch observability.

Speedrun Talent Network

Remote Backend Engineer for AI Platform & Systems

New RemoteUK

Backend engineer building integrations and reliability features for ElevenLabs' voice AI platform, scaling systems for millions of users. Day-to-day work centers on Python, API development, security, and scalable infrastructure in a remote-first setup with optional offices worldwide.

Senior Python Backend Engineer – Django, AI, AWS

New HybridUKSenior

iFindTech.ai is hiring a Senior Python Backend Engineer in London (hybrid) to build backend services, APIs, and AI-enabled production features. Day to day involves working with Python, Django, and AWS, with a focus on clean code, testing, and cross-functional collaboration.

AI API AWS Django Python

Client Server Limited

London Backend Engineer (C#/.NET) - Sports Trading, Onsite + Bonus

Backend Engineer (C#/.NET) joining a sports trading team onsite in London, building robust backend systems, APIs and data flows for high-availability trading. Core stack: C#/.NET, ASP.NET, and SQL or Oracle.

API C# .NET Oracle SQL

Carousel Consultancy

Backend Engineer - FinTech AI Platform (Hybrid/London)

AI API AWS Event Driven Architecture Express.js +4 skills

Backend engineer building scalable services for a rapid-growth FinTech AI platform in London, working with Node.js/Express and Python deployed on AWS and designing RESTful and event-driven APIs. Hybrid (London) or UK/European remote; salary up to £100k plus equity.

up to 100K £

Commerce Software UK Ltd

Backend Engineer II, Data Experience

API Event Driven Architecture Observability

Commerce is hiring a mid-level (Engineer II) backend engineer in London for its Data Experience squad. The role focuses on building reliable backend services and APIs, working with data models and event-driven flows, and keeping production healthy through monitoring, observability, and robust testing.

Rightmove

Backend Engineer (Java 21+, Spring Boot) - Hybrid

Java Microservices Spring

Rightmove is hiring a Backend Engineer in London (hybrid) to design, build and scale Java 21+/Spring Boot services and in-house microservices that power millions of users. The role involves owning features end-to-end and working with product, design and engineers to improve performance, resilience and security.

Cavendish Professionals

Founding AI & Data Backend Engineer

A founding engineer at an early-stage AI/data/healthcare startup in London, owning architecture and backend systems from day one — including large-scale data processing, LLMs, and high-performance services — while helping shape the product and engineering culture.

Backend Software Engineer Python R&D

Backend Software Engineer (Python, R&D) for a cybersecurity technology company that uses AI to protect clients globally from advanced cyber threats. The role involves problem solving on complex backend systems and pays up to £85k, based in London/Cambridge with work-from-home flexibility.

AI Cybersecurity

up to 85K £

Candour Solutions Limited

Backend Systems Developer

A hybrid backend developer role in Liverpool focused on building and improving the integrations that underpin a technology-led organisation's digital systems, within a growing engineering function. Salary is £40,000–£60,000; specific technologies are not detailed in the posting.

40K – 60K £

Lumentum Operations LLC

Senior Process Development Engineer (Backend)

New UKSenior

AI Cloud Process Improvement Root Cause Analysis Six Sigma

Senior process engineer at Lumentum's Caswell semiconductor fab (Towcester, UK) developing and improving photonic chip manufacturing processes — thin-film deposition (ALD, PECVD, sputtering), metallization, and backend wafer processing (thinning, CMP, dicing) — using SPC, Six Sigma, and Lean to drive yield, NPI, and cycle-time gains.

Xapply

Senior Backend Engineer — Remote, AI-Driven Platform

New RemoteUKSenior

A remote-first engineering organization is hiring a Senior Backend Engineer to design, implement, and evolve backend capabilities across teams. Day to day, the role involves shaping architecture, improving reliability and performance, mentoring engineers, and collaborating with PMs and designers across product, infrastructure, data, and security boundaries.

Senior Backend Engineer - AI Platform (Hybrid, London)

New HybridUKSenior

A Staff/Senior Backend Engineer at Capsa AI owns projects end-to-end, building the infrastructure and services behind its AI platform — designing agent features, scalable data pipelines, and robust APIs. Based in London on a hybrid schedule (4 days/week in office), in a fast-paced startup.

AI API Data Pipelines

motorolasolutions

Senior Backend Engineer - Cloud/AI (Hybrid UK)

New HybridUKSenior

Develop and maintain the cloud-based backend of Motorola Solutions' Alta Video Management System, which monitors and manages video cameras, access control systems and sensors. This is a hybrid role (1-2 days/week in the Uxbridge office) in an agile R&D environment with a focus on quality and security.

Corevia Search

Senior Backend Engineer - High-Throughput Systems (Remote)

New RemoteUKSenior

Distributed Systems Kafka RabbitMQ

Senior backend engineer at Corevia Search owning major parts of a high-throughput platform handling thousands of transactions per second at ~50ms latency. Day to day: designing distributed systems, working with Kafka/Pub-Sub/RabbitMQ, driving engineering standards and mentoring, with a path toward Staff/EM roles.

BPM Tech

Cloud Backend Engineer | AWS + Node/TypeScript | Hybrid UK

API AWS Cloud DynamoDB Lambda +5 skills

A back-end/cloud engineer at BPM Tech designs scalable services and REST APIs with Node.js and TypeScript, and builds serverless applications on AWS (Lambda, API Gateway, S3, DynamoDB), collaborating with front-end developers in a hybrid London-based team.

yld2

New HybridUKContractSenior

Contract Senior Backend Engineer (Go) - London/Remote

YLD is hiring a contract Senior Backend Engineer (Go) to join a client team, designing scalable, resilient architectures and collaborating with cross-functional teams. The role is London-based hybrid (1-2 days on-site per week) with a remote-first approach across distributed teams.

Carousel Consultancy Ltd

Backend Engineer – FinTech AI Platform (Hybrid/Remote)

New HybridUK

AI API AWS Event Driven Architecture Express.js +4 skills

Backend Engineer at a fast-growing FinTech AI platform in London: design and run backend services plus RESTful and event-driven APIs using Node.js, Express, Python and AWS. Hybrid in London or UK/European remote, salary up to £100k plus equity.

up to 100K £

Client Server Limited

Backend Engineer TypeScript – Remote/WFH Cyber Security

New HybridUK

Builds and owns TypeScript backend services for a cybersecurity company's customer portal, taking features from rapid prototype to production-ready systems with a security focus. Hybrid role: two days per week in the Cambridge office, the rest working from home.

TypeScript