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Senior Backend Engineer – High-Scale Systems | Python & FastAPI | Security SaaS. 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.

NET Core Backend Engineer | 💳 Greenfield Payments Platform | £130,000 + Bonus + Benefits | Hybrid (London). Join a brand-new Payments Engineering team. Driving engineering excellence — CI/CD, testing, observability, and automation across the stack.

This role goes beyond traditional backend engineering. If you want your engineering work to have real-world impact, this is where it happens.

LLM agents and MCP tools to automate internal software engineering and research tasks, with sandboxes to prevent major failures. Beyond the SWE team, you will closely interact with the research scientists and engineers as the primary user group of your tools.

A leading technology company in Greater London is looking for a skilled Ruby developer with 6-8 years of experience.The ideal candidate should have a strong command of Ruby on Rails and its nuances, along with the ability to work on Web APIs and understand object-oriented programming.Familiarity wit

The successful candidate will work with Elixir and Ruby, leading engineering standards while supporting less experienced developers. A dynamic tech recruitment agency is looking for a Backend Developer to join a fast-scaling technology business focused on a leading IoT platform in the UK.

A technology consultancy in the UK seeks a skilled Software Engineer to work on impactful government projects.

An emerging AI technology firm is searching for a Software Engineer with over 2 years of experience in software development, particularly with Django.

A dynamic technology company in Greater London is seeking talented engineers to develop APIs and micro-services while using emerging technologies within a collaborative team culture.

A tech company in the UK is seeking a skilled Product Designer to be actively involved in the product design cycle, working collaboratively with BAs, product managers, and tech teams.Candidates should have at least 3 years of experience, proficiency in design tools like Sketch and InVision, and fami

You will take ownership of the Playfinder and Bookteq platforms, ensuring our backend logic is robust and our infrastructure is secure and scalable. You will be the primary technical owner of our backend and infrastructure. We are looking for a Backend-focused Full Stack Developer (Mid or Senior) to

An innovative AI startup in London seeks a talented AI Engineer to join the Science team.

Chumley is an early-stage tech startup building software that gives tradespeople the flexibility and tools they need to focus on their work, streamlining workflows and keeping more engineers operating at optimum levels. Chumley is looking for a Junior Software Engineer to help design, build, and sca

You’ll be working in a team of backend engineers across MPG to spearhead the delivery and deployment of backend services for industry-leading game projects. We are looking for a highly experienced Principal Backend Engineer. Act as the engineering contact point between MPG and the client, working

A dynamic fintech company in London is searching for a Senior Back-end Engineer to develop and lead critical backend services for a B2B SaaS platform.

A healthcare technology company is seeking a Senior Backend Software Engineer for its London office. This hybrid position requires expertise in Java and backend systems design. You'll collaborate with product and design teams while mentoring junior engineers.

A growing logistics startup in London is looking for a Staff Backend Engineer passionate about solving complex operational problems.

A leading educational technology company in Greater London is searching for a Full-Stack Developer to engage in backend and frontend development using cutting-edge technologies like Python and Django.

You will collaborate closely with senior engineers, data engineers, and platform teams to deliver scalable, reliable, and performant solutions running on GCP and AWS. We are looking for a mid‑level Software Engineer with strong technical fundamentals and hands‑on experience developing Apache Spa

A leading digital energy supplier in London is seeking a Backend Engineer to join their team focused on business energy solutions.

A growing tech startup is seeking a Senior Consultant to revolutionize backend systems using Python and cutting-edge technologies.

As a backend engineer, you will collaborate with cross-functional teams to build resilient solutions and support customer outcomes. A leading fintech company is seeking a Senior Engineer to join their team. Experience with strongly-typed languages and backend development is crucial.

A backend engineer motivated by using reliable infrastructure to improve patient care. Strong backend engineering experience:. Our small (for now) but mighty 6-person engineering team is tackling big, ambitious problems across Health & Fitness Devices and Lab Testing.

Candidates should have extensive backend development experience in data-driven B2B settings, strong programming skills in Python or Go, and expertise in API design and cloud infrastructure.

Lead backend initiatives to improve system performance and scalability, collaborate with teams to drive innovation in product and infrastructure, grow your expertise in Kotlin and distributed systems while mentoring other engineers, and contribute to shaping the future of our product as Pleo scales

A leading bank in the United Kingdom is seeking an experienced Backend Engineer for a 6-month contract role.

Global Media client now requires an experienced Backend/Platform Engineer to ensure their cloud estate and infrastructure is secure, capable and resilient throughout their modernisation programme. This role will work collaboratively with engineering teams, covering non-functional requirements and co

A dynamic tech company in Greater London is looking for a Backend Engineer to join the Promotions team. This role emphasizes backend expertise, particularly in Golang, and the ability to take ownership of complex initiatives in ambiguous settings.

A leading tech firm located in Greater London is seeking a Staff-Level Full-Stack Software Engineer. The role emphasizes strong expertise in building secure backend systems using Python and/or Go.

This role requires strong experience in mobile and backend technologies, including React Native and. The engineer will work in a collaborative environment, contributing to code, solving technical challenges, and mentoring team members. A leading travel loyalty firm in London seeks a Full-Stack Engin

A London-based trading company is seeking an experienced Java Engineer to join their technology team on an initial 6-month contract. The role focuses on backend development using Java and Spring Boot, building scalable services, and collaborating with various teams.

The role involves bridging backend development with data science, and requires practical experience in handling large datasets and implementing both SQL and NoSQL database designs.

Ideal candidates should have a proven record in backend systems, with experience in distributed systems and microservices architecture.

We’re looking for engineers passionate about learning, continuously evolving their skills, and pushing the boundaries of software development. We don’t expect you to know everything, but we value your eagerness to expand your knowledge and contribute to the growth of our engineering team. At Unc

We are looking for a Senior Backend Engineer to join our Octopus Energy for Business team (OEB).

A leading fitness apparel company is seeking a Backend Software Engineer for its engineering team.

Collaborate closely with product managers and other engineers to integrate with a high-performance ecosystem. Strong backend skills and knowledge of system design, performance and maintainability. This role is ideal for engineers who enjoy deep technical work and want to see their ideas come to life

Our team is small, highly motivated, and focused on engineering excellence. Most of our backend infrastructure is written in Rust.

A technology-driven startup in London is looking for a Software Engineer to build shared platform layers for AI solutions.

A leading technology firm in Greater London seeks a deeply technical Senior Backend Engineer to lead backend integrations with telecommunications giants. Ideal candidates will have over 7 years of backend engineering experience, with strong skills in Golang and API design, and enjoy hybrid work with

A recognized staffing firm in the UK is seeking a Lead Software Engineer to spearhead backend development with a product-oriented approach.

Our team is small, highly motivated, and focused on engineering excellence. All engineers are expected to have strong communication skills. Most of our backend infrastructure is written in Rust.

A global financial institution is seeking a Senior Rust Engineer to enhance their equity derivatives trading platform. The role involves designing core components, writing high-performance Rust code, and guiding less-experienced engineers.

A circular fashion marketplace is seeking an experienced Backend Software Engineer to join their team in London.

Swedium Global Services is the growing System Engineering and Solution Company, offers services like Semiconductor Engineering R&D Services, Embedded Systems Development, Custom Application Software Development, Web and Cloud Application Development, Testing Services, Consultancy and Outsourcing ser

Work closely with Product Managers, Designers, Data Scientists, Front‑End and other Backend Engineers to understand problems and to design solutions. Depop is looking for an experienced Backend Software Engineer to join us permanently. Collaborate on a daily basis with fellow engineers in the cros

A cybersecurity solutions provider in the United Kingdom seeks a skilled Backend Engineer to design and develop backend systems for their innovative cybersecurity solutions.