Backend jobs in London - Page 12Create job alerts

We're seeking a talented and ambitious Developer to join us as Senior Software Engineer, with potential to move quickly into a Head of Technology role, pending performance.The ideal candidate will be hungry to be a part of building something from the ground up, shape team culture, and prove themselv

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.

Backend Software Engineer (Python/Django). API design and backend architecture.

Own scaling, performance, and reliability of backend systems. Help shape the backend architecture of the company from early days. Experience with Python in production systems, plus at least one additional backend language (e.

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 years of working in startups as a backend engineer;. Our backend tech stack is Spring Boot with Java/K

With a 50/50 gender-balanced team and strong technical leadership, they’re now looking to make a key backend hire as they scale thoughtfully. This is a Backend Product Engineer position with real ownership. You’ll touch everything, from core backend systems to product features.

Lead Backend Engineer & x1 Senior Full Stack / Backend Engineer. They're recruiting for x2 Engineers - Senior Full Stack/Back End + Lead Backend.

We are seeking a Senior Backend Engineer with meaningful hands-on experience in event-sourced systems.

We are looking for a Senior Backend Engineer to join our new Quantitative Sports team. As a Senior Engineer you will play a critical role in the development and maintenance of the backend aspects of the pricing system for our sportsbook and work alongside our quantitative analysts to deliver our in-

Compensation: Competitive, based on location and experience .Location: UK or Turkey (Hybrid – Office & Remote).Keepnet is an AI-driven SaaS platform experiencing strong, sustained growth in the UK with growing global momentum, helping organisations manage human cyber risk at scale.Keepnet runs

They are a small, focused team looking for a Senior Backend Engineer to help them scale up their AI platform and make a real impact. Build and scale backend systems for AI-driven automation products. Collaborate directly with our CEO and CTO to architect end-to-end backend solutions.

As a Backend Support Engineer, you will be the primary Level 2 technical responder during UK operating hours, ensuring our platform runs smoothly for our global partners and clients. When the support queue is clear, you will operate as a standard backend engineer — tackling technical debt, perform

This role focuses on building reliable, secure, and high-performing backend services that power new features and capabilities. Scale and evolve backend infrastructure. Backend Product Engineer (London) -.

We’re hiring a Backend Engineer to build the core infrastructure behind Revax’s AI-native platform for professional services. This is not a “ticket-taking” role -you’ll work directly with the founders, own critical backend services end-to-end, and help define how AI systems are built res

They are looking for a Lead Backend Engineer who is passionate for the DeFi space and has a real hunger to work in a lean but highly skilled team. Build and maintain high-performance backend services with Node. Collaborate with Product, Design, and users to deliver reliable backend solutions.

Backend Engineer (Mid or Senior).

Backend JavaScript / TypeScript / Node.

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

Reporting to a Software Engineering Manager or Head of Engineering, we are seeking a Lead Backend Software Engineer to be the go-to authority for backend engineering, setting the technical vision, guiding architecture, and driving improvements in tools, processes, and delivery practices. Role: Lead

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

Python-based backend development. Experience with database technologies (preferably PostgreSQL) and backend frameworks such as. Develop custom APIs and backend services to enable seamless integration with customer environments.

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

Lead Java Backend Engineer Hybrid - 2 days per week in Newcastle/London This is an opportunity for a Lead Java Backend Engineer to shape the backend technical direction, bring teams together, and introduce modern engineering practices that support scalable, secure, and high-performing systems. What

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

What You'll Be Doing Design & Development Build and maintain scalable SaaS applications Develop clean, well-structured backend systems using modern Laravel Design and implement robust RESTful APIs for a React frontend Architecture & Ownership Own backend architecture and code quality Design multi-te

The role involves designing and developing backend services for AI capabilities, ensuring reliability and scalability. Ideal candidates will have over 4 years of experience in backend engineering, particularly with Python or Java. A tech company in Greater London is looking for a talented Backend En

As a key member of the team, you will focus on backend software engineering, developing high-quality code in C#, and participating in the full development life cycle. This role emphasizes user-centric design and continuous improvement, requiring close collaboration with product, design, and backend

A financial services firm in Greater London is seeking an exceptional Software Engineer to join their Backend Engineering squad.

FYLD is looking for a Principal Backend Engineer. This is a critical role for the business as we continue to enhance our backend systems to support our growing product offerings and long-term roadmap. Design and develop containerised backend services and scalable APIs using Django, AWS, and Terrafor

A leading blockchain payments company in the UK is looking for a Senior Backend Engineer to design and build backend systems for their financial infrastructure. The ideal candidate has over 5 years of backend engineering experience and a passion for scalable financial systems.

A leading global financial services firm in London seeks a Software Engineer III to join their Accelerator business.You will develop innovative products and tackle real-world problems in a collaborative environment.Strong skills in software development (Java/Kotlin) and a passion for fintech are ess

A technology firm in Greater London seeks a Manager, Software Engineering, to architect high-performance backend systems on AWS.