13 of 13 Backend Developer Jobs in the City of London

excellence, integrity and respect. We are headquartered in New York and have more than 60,000 employees spanning six continents. Role Title: .NET Core Backend Developer BU/Segment: Analytics/Insurance Location: London, United Kingdom (Flexible hybrid working) Employment Type: Permanent Summary of the role … seeking an experienced .NET Core Backend Developer to join our Analytics team in London. You will design and build secure, scalable backend services and RESTful APIs that power enterprise-grade SaaS and analytics solutions, primarily within the insurance domain. Working in an agile, cloud-first environment ...

Senior/Lead Developer (Backend C#) Location: London – Hybrid 2 days a week on site Salary: £85,000–£95,000 +10% bonus You’ll join a core product or platform squad, owning backend services that operate at serious scale and shaping the way the engineering function delivers. … What You’ll Be Working On Designing and building high‐volume, low‐latency backend systems Writing clean, scalable .NET Framework and .NET Core code Working in cross‐functional squads using Shape Up Developing APIs and platform services that power key products Enhancing performance, reliability, and production stability Leading technical ...

Backend Engineer, London, £60,000 - £75,000 + Benefits A Backend Engineer is needed to join an ambitious and fast-scaling technology company operating within a regulated market. This role is based in central London 4 days a week on-site. As their product suite evolves and customer … demand increases, they are investing in senior engineering talent to strengthen backend capability and long-term platform resilience. This hire is central to that journey, offering meaningful equity and the opportunity to influence architectural decisions at a critical stage of growth. The Backend Engineer (Full Stack, backend ...

Backend Golang Developer | London | 75k-85k | 3x a week on-site | Are you a Backend Engineer who loves solving complex technical problems and building systems that actually matter? We’re looking for someone who wants to work on high‐availability, secure, global financial infrastructure powering millions … users. You’ll work across modern backend architecture, building services that are fast, resilient, secure and built to scale , all while collaborating closely with product, mobile, and frontend teams. What You’ll Work On Designing and improving backend services that power web + mobile applications Building and maintaining ...

Senior DotNet Backend Developer – WealthTech SaaS Platform – London, UK – 6 Month Contract (Outside IR35) A global wealth management technology provider is seeking multiple DotNet Backend Developers to contribute to its core enterprise SaaS platform used by private banks and wealth management firms. We’re looking for developers … wealth management. Backed Development Work across the full software development lifecycle (SDLC), from requirement gathering to testing and deployment Design and develop robust backend services using .NET Core/C# Build and maintain scalable RESTful APIs and collaborate with front-end developers on UI integration Develop and maintain Azure ...

Strong foundation in software development with C# and TypeScript. - Experience with AI/LLM concepts (e.g., prompt engineering, RAG). - Analytical mindset for assessing sufficiency (relevance, completeness, freshness) and mitigating risks like hallucinations. - Focus on ...

Strong foundation in software development with C# and TypeScript. - Experience with AI/LLM concepts (e.g., prompt engineering, RAG). - Analytical mindset for assessing sufficiency (relevance, completeness, freshness) and mitigating risks like hallucinations. - Focus on ...

Cloud Backend Engineer (Python/AWS/Kubernetes) 🚀 📍 London (Hybrid) 📅 ASAP - End May 💰 Competitive Day Rate – Outside IR35 We’re supporting a highly PE-backed Professional Services organisation building cloud-native, AI-enabled applications within tax advisory. This is a hands-on engineering role sitting within a cross-functional … delivery squad. You'll be building backend APIs and deploying them into a modern AWS + Kubernetes environment. 🔑 The Role • Building backend APIs in Python (FastAPI ideally) • Working with PostgreSQL • Deploying services into AWS (EKS preferred) • Managing container workloads in Kubernetes • Building infrastructure with Terraform • Implementing CI/ ...

EXL (NASDAQ: EXLS) is a global data and artificial intelligence ("AI") company that offers services and solutions to reinvent client business models, drive better outcomes and unlock growth with speed. EXL harnesses the power of ...

Senior Backend Engineer | Digital Payments | FinTech | Hybrid/Remote | £90k Company Overview: A fast-growing global FinTech company building modern, on-chain financial infrastructure for payments, banking, and investments across 140+ countries. Role: We’re hiring a Senior Backend Engineer to join a Digital Payments team working … high-scale systems that integrate with global bank networks, card schemes, and modern payment methods. You’ll own core backend services, influence architecture, and help move millions in daily transactions. Requirements: • 5+ years backend engineering experience. • Strong JavaScript/TypeScript/NodeJS expertise. • Experience with microservices, REST APIs ...

Title: Senior Back End Developer • Salary Range: £90,000 – £110,000 + bonus • Location: London | Hybrid (2–3 days office) Our client is investing heavily in a new digital capability as part of a wider transformation programme, creating a rare opportunity to join at the very start … greenfield product build. This Senior Back End Developer role will shape a brand-new data platform designed to support complex decision-making for major global organisations. You’ll join a highly experienced, close-knit team with the autonomy to define architecture, tooling, and engineering standards from day one. ...

Role : Senior Python Backend Engineer Location : London King's Cross - full time on site Salary : up to £200k base + equity We are partnered with a high-growth AI-driven platform that helps large enterprises automate complex, data-heavy workflows. The company is well-funded with. over $90M from … scaling rapidly, and already working with globally recognised organisations in a highly regulated environment. The Role As a Senior Backend Engineer , you’ll help design and scale the backend systems behind a sophisticated AI platform. You’ll work on high-performance services, complex data pipelines, and secure infrastructure ...

Senior Backend Engineer – Remote first, London office (UK) 💰 £65k–£75k | ⏳ Full-time, 4-day work week I’m working with an exciting client who is looking for a Senior Backend Engineer to join their mission-driven team transforming frontline public services with AI. This is a unique opportunity … well being and justice, reduce admin, improve compliance, and spend more time on meaningful human work. What You’ll Do: Build and scale core backend systems, APIs, data pipelines, and integrations Collaborate with CTO, product, and design teams to deliver tools used by real frontline workers Write maintainable, tested ...