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Backend Engineer (Python, FastAPI/Flask/DjangoGPU/CUDA) 📍 Bristol (Hybrid) 💰 £55,000 - £70,000 + Benefits 📝 Permanent The Opportunity An innovative analytics organisation operating within the insurance and risk sector is looking for a Backend Engineer to join th

Design, develop, test, and maintain secure, high-performance backend services using modern programming languages.

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

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

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

Software Architect Java - BackEnd, Back End Google Cloud (GCP)Contract: Until December 2026 - RenewableLocation: Essex Offices (located between Brentwood and Basildon) 4 days a weekRate: £600 per Day Inside IR35The finance and banking division of this engineering company and household name is se

A leading EdTech company seeks a Senior Backend Platform Engineer to design and build scalable backend services for their digital learning platforms in London. The ideal candidate will have strong experience in backend engineering, RESTful API design, and cloud systems.

A cybersecurity company in Greater London is seeking a Senior Backend Engineer to tackle complex engineering challenges. You will design and evolve architectures for an integration platform connecting over 150 security tools and build backend services to support AI capabilities.

As a Senior Backend Software Engineer in the Core Team, you’ll play a critical role in engineering the backbone of our payment platform.

A financial technology company in Greater London seeks a generalist developer to contribute to various projects.The role involves building and maintaining client libraries for APIs across multiple languages like PHP and Ruby, working on identity-checking systems, and developing internal services for

A tech consultancy is seeking a hands-on Python Developer for a contract role in Dacorum.You will be involved in building and maintaining Python-based back-end services, developing web applications with frameworks like Flask or Django, and supporting legacy system modernization.A proactive problem s

We’re on a mission to make money work for everyone.We’re waving goodbye to the complicated and confusing ways of traditional banking.With our hot coral cards and get-paid-early feature, combined with financial education on social media and our award winning customer service, we have a long histo

A fintech startup in London seeks a Backend Developer to create AI-powered product capabilities and scalable backend architecture. Ideal candidates will have 3–4 years of experience in backend development, particularly with Java and Spring Boot.

Backend : Typescript,EVM and integration patterns. They are looking for a Senior Backend Developer who will own the infrastructure powering data pipelines, APIs, real-time delivery, and the databases underneath. Own architecture decisions for the company's backend systems.

Has 5+ years of professional backend experience with strong computer science fundamentals in data structures, algorithms, and software design patterns.

We are looking for a generalist developer to join our team to help build out systems & handle user growth.You’ll have the opportunity to contribute to different areas of the code-base and choose which projects interest you.Our service is built on Ruby on Rails, but particular experience is not a p

A cutting-edge technology firm is seeking a hands-on leader for backend and data engineering in London.

Create robust APIs and data service: Design and optimise APIs and backend services that power Vega’s frontend applications and enable complex data workflows across the platform. Build AI‑powered product capabilities: Design and develop backend systems powering Vega’s AI‑enabled platform, inc

A high-growth B2B SaaS company in the United Kingdom seeks a Software Development Manager to lead a team of about 8 engineers.In this non-coding but highly technical position, you will drive engineering best practices, improve team performance, and support critical technical decisions.The ideal cand

In this role, you will design and build high-performance backend services, leveraging your skills in Rust and PostgreSQL to contribute to critical financial infrastructure.

As a Senior Software Engineer, Backend at Fanalysis, you'll be responsible for building and maintaining the robust backend services that power our football fan platform. Solid grounding in backend software development. Designing, building, and maintaining high-performance backend services and APIs t

As a Backend Engineer at Monzo, you'll help build one of the UK's fastest-growing digital banks, serving 9M+ customers.

A dynamic technology firm in the UK is looking for an engineer to join their mission-driven product team.This role involves tackling complex software challenges while ensuring robust and scalable systems.You'll be responsible for designing high-quality software solutions and collaborating closely wi

A dynamic technology company in London is seeking a Senior Software Engineer to build and maintain backend services for their football fan platform.

A leading AI solutions provider in Greater London is seeking a Lead Software Engineer to spearhead backend and edge/IoT engineering for high-stakes defence projects.

As a Senior Backend Engineer at Monzo, you'll take technical ownership of key product areas in one of Europe's leading challenger banks.

A leading tech company in Greater London seeks a Lead Software Development Engineer in Test (SDET) to oversee a small team, drive automation strategies, and enhance testing processes.Candidates must have a minimum of 8 years of experience in test development, strong Java proficiency, and a backgroun

The ideal candidate will have 6-11 years of experience, strong skills in backend systems and APIs, and a passion for continuous improvement.

A blockchain technology company is looking for a Blockchain Backend Expert to design and develop efficient blockchain technologies for their distributed ledger system.

A leading gaming company in Greater London is seeking a Lead Engineer for Mobile Games.This role requires over 10 years of experience with commercial game engines, a strong proficiency in both Unity and C#, and a proven record in delivering game-as-a-service architectures.The successful candidate wi

The successful candidate will bridge the gap between backend engineering and infrastructure security, implementing robust controls across a complex cloud and blockchain ecosystem. Candidates must be prepared for a live coding exercise focused on backend and systems logic. Engineering Proficiency: Mu

You'll be the engineer behind our commercial technology stack, building the backend systems that pull together product usage, contracts, subscriptions, and customer data — powering everything from billing accuracy to renewal forecasting to customer health scoring. You'll define how we structure, s

A mission-driven tech scale-up is seeking a Senior Backend Engineer to design, build, and scale their core software platform. This hands-on role involves creating backend services in Python and improving system performance while collaborating with a high-performing team.

A fast-growing HealthTech company in London is seeking a Backend Software Engineer to join its Agile engineering team. Ideal candidates will have a solid understanding of backend system design, strong communication skills, and experience with technologies like Spring and JPA.

Senior Software Engineer, Backend Services & APIs. Senior Software Engineer, Backend Services & APIs. Familiarity with computer science fundamentals and backend development concepts.

A leading blockchain infrastructure company is seeking a Senior Backend Engineer to join their WalletConnect Pay team. In this fully remote position, you will be responsible for designing and maintaining backend services across the payment platform, including payment orchestration and APIs. Ideal ca

A specialist consultancy in the education sector is seeking a Senior Back End/Data Engineer.The role involves building ETL pipelines, designing SQL schemas, and ensuring secure data handling in a modern Azure environment.Ideal candidates will have excellent SQL skills and experience in creating data

A tech-focused proptech platform in London is seeking a Senior Backend Engineer to design and maintain high-performance APIs and microservices. The ideal candidate has over 5 years of backend experience and a passion for scalable architectures and clean code.

A scaling Fintech is seeking a TypeScript Developer / Backend Software Engineer to enhance their energy trading platform. You'll engage in backend development using TypeScript, Node, and AWS while contributing to technical discussions.

A financial technology company based in London is seeking a skilled Back End Engineer to join their Credit Compass team.In this role, you will integrate rich data sources and assist in building features to help small businesses manage their credit health effectively.The ideal candidate will have exp

You’ll be UK or EU based and you’ll be working in a team of backend engineers across MPG. We deliver, deploy and help integrate backend services alongside external co-dev clients as part of industry leading game projects, and collaborate to define solutions and implement features on time and to

You will guide backend architecture, ensuring high standards in performance, security, and reliability.

We need senior backend engineers who can take ownership of complex problem spaces, ship production‑grade services, and help us build the engineering foundation for the next generation of onchain payments. This is a Senior Backend Engineer position on the WalletConnect Pay team. The common thread i

NET Engineer to join their backend team.

Senior or Staff Backend Product Engineer. Scale and evolve backend systems as the product grows.

A leading data collaboration platform in Greater London is seeking a mid-level Software Engineer with strong experience in Apache Spark and developing RESTful APIs.The successful candidate will design applications for large-scale data processing while working within cloud-native environments.Respons

Synchro has partnered with a large and very well-known bank / financial services organisation and we are hiring for an experienced and talented Senior Backend Engineer. Strong background in backend Engineering, with experience of Java and / or Kotlin.