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Senior Backend Engineer – High-Scale Systems | Python & FastAPI | Security SaaS. They've completed Series A funding, raising $29 million across three funding rounds, and are now seeking a Senior Backend Engineer. You will be in charge of building scalable backend services and awesome messaging que

Our backend tech stack is Spring Boot with Java/Kotlin/Groovy, MySQL and Opensearch, hosted on AWS. Our frontend is React with Typescript, and you will be expected to contribute small features to the frontend (though the role is at least 95% backend). You're an experienced engineer with multiple ye

The role involves the design and development of backend services and infrastructure for Machine Learning workloads.

Software Architect Java - BackEnd, Back End Google Cloud (GCP).

A leading finance technology company in the UK is seeking a Back End Engineer to enhance payment systems and financial data infrastructure.This hybrid role offers flexibility to work remotely and aims to empower small businesses through innovative technology solutions.Ideal candidates should have a

A leading retail innovation company is seeking a talented Backend Software Engineer to join their dynamic and agile team.

We are looking for an exceptional Software Engineer, to join our Backend Engineering squad.

A leading technology firm is seeking a Software Engineer to enhance backend and frontend services related to Client Services.

A leading tech company is seeking a MongoDB Developer to lead database delivery, including schema design and performance tuning.The ideal candidate will have 6-10 years of experience in software development focused on MongoDB, strong analytical skills, and a collaborative approach.Responsibilities i

The role involves leading backend development using advanced Python skills and collaborating with product and design teams.

A prominent tech company is seeking skilled engineers in Greater London to join their Core Tooling team.The role involves contributing to tooling for efficient development, focusing on Go, Kubernetes, and AWS.Candidates should demonstrate strong software-related security experience and a collaborati

The role requires 5+ years of backend experience, particularly in TypeScript, and familiarity with real-time systems such as WebSockets. A leading fintech company is looking for a Senior Backend Developer to own the infrastructure for data pipelines, APIs, and databases.

We're a startup in the automated decisioning space - and the backend is where the hard problems live. We're looking for a Senior Backend Engineer to join our engineering teams. Build and operate backend services in Python on AWS - Lambda functions, DynamoDB, Aurora, and event-driven pipelines that h

A leading game development firm in the United Kingdom is seeking a Principal Backend Engineer to lead the delivery and deployment of backend services for game projects.

A cutting-edge AI company in Greater London seeks a Lead Software Engineer to spearhead backend and edge/IoT engineering for Defence projects.

Senior Software Engineer I - Backend (Java) - Business Accounting Integrations and Reporting. Strong proficiency in backend programming languages like Java, Python or Go.

This hybrid role requires expertise in Java and microservices architecture, with responsibilities including developing new features and maintaining backend services.

A leading sportswear company is seeking a Backend Software Engineer to develop and maintain cloud-native applications using TypeScript and microservice architectures. Candidates should have at least 3 years of backend experience and a strong collaborative mindset.

A leading global investment firm is seeking a Senior Java Developer to design and develop scalable applications that support trading operations.This role involves collaboration with multi-functional teams, optimizing high-performance APIs, and mentoring junior engineers.The ideal candidate will have

A leading AI company in Greater London is seeking a Senior Software Engineer to lead backend and edge/IoT engineering for high-impact projects.

In-depth understanding of data structures, system architecture, API development for microservices frameworks, distributed systems and other backend-related concepts and best practices. Architecting, developing, and maintaining high-performance, scalable backend services that underpin our operational

A recruitment agency is seeking a Senior Technical Lead to guide the delivery of scalable backend systems. This position balances leadership, architecture, and hands-on coding, with a focus on delivering impactful backend solutions.

You will have a leading role in designing, developing and maintaining the backend system that powers our cybersecurity platform – the platform we use to identify vulnerabilities in large enterprises.

Design, develop, and maintain backend services that support model training, inference, and experimentation.

A leading tech company in Greater London is looking for a Backend Engineer to build and maintain the platform foundations for their services used by over 600M users globally.

A growing AI startup in London seeks a Staff/Senior Backend Engineer to build robust systems for their AI platform.

As a Backend Engineer on Spotify's Core Infrastructure team, you'll build and maintain the platform foundations that power Spotify for 600M+ users globally.

A leading identity verification firm in Greater London is searching for a Manager, Software Engineering to lead the design of scalable, high-performance backend systems.

We’re hiring a Member of Technical Staff (Backend/Infra) at Ona. Ensure reliability and continuous evolution of your focus area, whether frontend, backend, or infrastructure. Note: if you are more specialized in one over the other (backend vs infrastructure), please still apply!.

As a Security & Backend Engineer, you will own core pieces of our Scala + Python backend while raising the bar on how we protect data, systems, and customers. Deep Dive – Walk through past backend and security work. Work Sample – Tackle a Boam‑style backend and security challengeFounder Conver

A leading secondhand fashion company in London is seeking a Senior Backend Engineer to join their product engineering team focused on digitizing the supply chain. You will design and build backend systems for their marketplace, integrating AI for seamless inventory workflows.

A leading technology firm in Greater London is seeking a Security & Backend Engineer to enhance its core data solutions. The ideal candidate will own backend services and ensure data and system security, balancing feature delivery with long-term hardening. You should have over 5 years of experience

This role involves developing and maintaining high-performance backend systems, integrating RESTful microservices, and leveraging big data tools like Spark and Kafka.

A leading online gaming company is seeking a skilled developer for backend programming in Go as part of a hybrid role.

This remote position focuses on backend and API testing, ensuring quality across their services.

We are looking for a Backend Engineer who will help build our Receive platform. Strong proficiency in backend programming languages like Java, Python or Go.

A leading infrastructure company in Greater London is seeking a Software Engineer to architect and develop its cloud platform.The ideal candidate will have extensive experience with Go and Kubernetes, and a strong focus on security and performance.This role offers the opportunity to collaborate with

A leading decision-making software company is seeking a Senior Backend Engineer to build and operate backend services using Python on AWS. The role involves tackling complex backend challenges and making key architectural decisions.

As a Backend Software Engineer you will design and develop data centric backend services for the core platform with a focus on Python coding and building FastAPIs within an Azure environment with Databricks. Backend Software Engineer / Developer (Python FastAPI SQL IaC) London to £95k. Are you a da

A full-service product and engineering agency is seeking a Mid/Senior Software Engineer in London with a backend development focus.

You’ll dive into Electroverse Backend, the logic that drives the Electric Vehicle (EV) charging experience at Octopus Energy, and work toward deploying backend features to our global user base. You will learn the key skills and architectural patterns (Git, Python, CI/CD and network interfaces) req

Backend Development: 4+ years of experience in backend development, ideally with expertise in both PHP (Symfony) and JavaScript (Node. Testing and Quality Assurance: Design and implement comprehensive testing frameworks, including unit, contract, and end‑to‑end tests, to ensure functionality, re

Backend Development: Java, Spring Boot, Microservices Architecture. Backend Engineer with 5+ years of experience specialising in Java and Spring Boot-based microservices. Designed and developed scalable backend services using Java and Spring Boot, supporting a high-availability microservices archite

The ideal candidate has extensive backend engineering experience, a strong background in Java and Kubernetes, and hands-on knowledge of search systems like Elasticsearch.

A leading travel technology firm in Greater London seeks a software engineer to build and maintain supplier integrations.The role focuses on connecting third-party APIs and ensuring data quality for pricing and availability.Candidates should be proficient in C# /.NET Core and relational databases.Th

SurrealDB is looking for a highly skilled and experienced Senior Backend Engineer to join our dynamic engineering team. Based in London, the ideal candidate will have a strong background in cloud technologies, building scalable backend systems, and operating production infrastructure at scale. You w

A dynamic technology company in Greater London is looking for a motivated mid/senior Backend Engineer to enhance their PHP and Node.

A leading broadband provider in the UK is seeking an Engineering Manager with expertise in ServiceNow to lead the development of robust backend systems.