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We're looking for a hands-on Tech Lead who builds, ships, and leads by example. You'll own architecture, contribute across the stack, and work closely with Product to turn ambiguous problems into impactful solutions. You'll also integrate AI/LLM capabilities into production systems, ensuring reliable, real-world outcomes. Please make an application promptly if you are a good match for this role due to high levels of interest. Key Responsibilities • Translate business needs into scalable technical solutions, • Design and evolve system architecture, • Contribute across frontend, backend, and infrastructure, • Drive best practices in CI/CD, testing, and observability, • Build and optimise AI-powered features (LLMs, inference pipelines), • Communicate clearly with technical and non-technical stakeholders, • 7+ years' software engineering experience, • Proven Tech Lead or senior engineer experience, • Strong product mindset and ownership, • Full-stack capability (strong Python/backend focus), • Experience with AI/LLM systems (or ability to ramp quickly), • Excellent communication and leadership skills xrnqpay, • Experience with DDD, CQRS, or event-driven systems, • Background in large-scale or data-intensive platforms

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.

Has 5+ years of backend engineering experience in production environments. Senior Backend Engineer (Free to Play). You’ll be responsible for building and maintaining the backend systems that power our new suite of games, constructing APIs, and producing robust and maintainable code within specifie

A modern technology company in the UK is seeking a talented Mid to Senior-level back-end developer to enhance its payments platform based on open banking.The successful candidate will have extensive experience in Java, Spring framework, and REST APIs, and will work within a collaborative, hybrid tea

The role involves designing and implementing systems-level backend engineering to support real-world aviation operations. A leading aviation technology firm in the UK is seeking a Senior Rust Developer focused on high-performance backend services.

We are looking for a Senior Engineer in our Collections, Recovery & Litigation (CRL) and Investor Management (IM) team. You will identify ways to automate manual processes, within both Engineering and the Operations teams that you will work with. You are a teacher - generous with your time and exper

You will work on backend systems and APIs, ensuring high availability and security.

An international technology company is seeking a Senior AWS Backend Engineer to design and deliver backend solutions using AWS.

A leading technology company in the UK is seeking a Software Engineer to design and develop backend services and APIs for high-availability payment processing systems. The ideal candidate will have 3-5 years of experience in software engineering with strong skills in Spring Boot and RESTful API desi

A dynamic tech startup in Greater London seeks a Senior Product Engineer to lead the development of cloud-native backend systems.

A B2B SaaS company in London seeks a Mid-Senior Ruby on Rails Engineer to own and improve operational systems, ensuring reliability and stability.

This is an opportunity to grow into a highly impactful product engineer: deepening your technical skills, understanding user needs, and building solutions that make a difference. Every day you’ll apply the “product engineer” mindset, being close to users and their needs, collaborating in user

A modern financial services company in Greater London is seeking a Mid Level Product Engineer (Backend) to design and develop backend systems that enhance user experience. You'll work on impactful projects, including payments and banking services, within a collaborative engineering team.

A leading financial tech scale-up in Greater London is seeking Mid and Senior Python Developers to join its backend team.

A gaming company is seeking a fully remote Senior Backend Engineer based in the UK or EU. The role involves working with a team to develop backend services for exciting game projects and contributing to internal tools. Ideal candidates will have experience in game development, backend services, and

A dynamic AI marketing startup is seeking a Senior Product Engineer to build secure backend systems in a PM-free environment.

Senior Product Engineer [Backend]. Join a high-growth startup as a core engineer building the future of Generative Marketing. You will own product areas end-to-end in a PM-free environment, designing secure backend systems for a platform used by Stripe and Canva.

A cutting-edge technology company in Greater London is seeking a skilled backend developer to architect AI frameworks and rapidly prototype novel AI interfaces.

As a Lead Software Engineer at JPMorgan Chase within Investment Banking, you play a crucial role in an agile team dedicated to enhancing, building, and delivering trusted, market-leading technology products that are secure, stable, and scalable. Leads communities of practice across Software Engineer

A leading graph database company in Greater London is seeking an experienced Back-End Engineer to join their Generative AI team.

A fast-growing fintech startup is seeking a Backend Product Engineer to architect and build core backend systems for a new product line.

A technology consultancy in Greater London is looking for an engineer to build a greenfield Python-based application utilizing Generative AI and NLP.

A leading insurance technology company is seeking a skilled Software Engineer to develop Python microservices and solve complex technical problems. The ideal candidate has a strong background in computer engineering, experience with cloud architectures, and excellent problem-solving skills.

A fast-scaling technology business in London is looking for a Lead Backend Engineer to take ownership of complex systems and guide architectural decisions. The role involves working within a product-led team to design scalable Back End services while implementing technical standards and mentoring fe

A leading technology firm in London seeks a Backend Software Engineer with expertise in C#.

A leading technology firm in London is seeking talented software engineers to join their front office trading technology team.

A leading blockchain technology firm in Greater London is seeking a Blockchain Engineer to join their backend infrastructure team. You will be responsible for implementing modern backend applications and collaborating on high-scale distributed systems.

A global brokerage and financial technology company in Greater London is seeking a Senior Middle Office Backend Software Engineer. In this role, you will lead a team of engineers to enhance the performance of the GBX platform, ensuring system resiliency and scalability. Candidates should have over 8

A specialized recruitment agency in Greater London is looking for a Senior Python Engineer to develop and maintain Back End services and infrastructure for a cutting-edge insurance business focused on AI.

A leading IT consultancy is seeking a Contract Software Engineer / Lead Developer to join their team in the UK.

Backend Software Engineer / Developer (C#. Are you an experienced C#, backend focussed Software Engineer? You could be progressing your career in a senior, hands‑on role at a global Sports Trading business, earning substantial bonuses. As a Backend Software Engineer / Developer you will receive a

Ideal candidates will have strong backend engineering experience, preferably in Java, and demonstrate a commitment to ownership and user-centric problem solving. A product-led software company in London is seeking a Product focused Senior Software Engineer.

Collaborate with engineers, product, and domain experts to turn customer workflows into reliable backend systems. We are looking for an experienced Backend Engineer who loves working with data, building robust services, and optimising distributed systems. Design, implement, and optimise backend serv

A leading AI venture studio in the London Area seeks a Founding Engineer for backend development.

As a Backend Engineer in our Commercial cluster, you will be at the heart of On's digital ecosystem. TypeScript, with a deep understanding of modern backend frameworks. Design, develop, and maintain robust and scalable backend services using our modern tech stack, with a primary focus on NestJS, Typ

A leading technology firm in the United Kingdom is looking for a Software Engineer to enhance client services and backend/frontend systems.

Candidates should have experience in backend systems and be familiar with large-scale distributed systems, Golang, and Kubernetes.

A cybersecurity solutions provider in Greater London is seeking a skilled Backend Engineer to design and develop backend systems.

Leads communities of practice across Software Engineering to drive awareness and use of new and leading-edge technologies.

A technology firm in Greater London is seeking a skilled Backend Developer to build and maintain their platform infrastructure.

A leading cloud-native video platform is seeking a Senior Backend Engineer to design and build scalable APIs and microservices.

A leading technology company is seeking a Senior Backend Engineer to build and scale backend systems.

A growing technology start-up is seeking a Backend Software Developer to integrate into their team. The role includes designing and maintaining APIs, optimizing backend services, and working on cloud infrastructure.

A leading financial services firm is seeking a Senior Lead Software Engineer to join its new team focused on innovative fintech solutions.

A regulated fintech company based in Greater London is seeking a Founding Engineer to design and build the core platform.

A global technology company in Greater London is seeking a backend developer for its Acquiring Platform team. Candidates should have strong proficiency in backend programming languages, expertise in RESTful APIs, and excellent communication skills.