22 of 22 Permanent Backend Developer Jobs in London

Backend Engineer VC-backed Tech : Node/MongoDB Fully remote in the UK Have you worked for a start-up or scale-up software company? Are you passionate about solving clients' real problems and making a difference in their business? Do you have 5+ years' commercial development experience … only agenda is making sure everything they do is to the best of their abilities. They are looking for a pro-active, analytical Backend Engineer to join a growing team. You will have an entrepreneurial and empathetic mindset that propels you to commit to delving deep into the user ...

Senior Backend Engineer VC-backed Tech : Node/MongoDB Fully remote in the UK Have you worked for a start-up or scale-up software company? Are you passionate about solving clients' real problems and making a difference in their business? Do you have 5+ years' commercial development experience … only agenda is making sure everything they do is to the best of their abilities. They are looking for a pro-active, analytical Senior Backend Engineer to join a growing team. You will have an entrepreneurial and empathetic mindset that propels you to commit to delving deep into ...

Lead Backend Developer – Node.js, TypeScript, Kafka - up to £80k Leading E-commerce Brand | Up to £80,000 | Hybrid (2 days/week in London) A leading e-commerce client is looking for a Lead Backend Developer to help shape the technical direction of a highly scalable … role in architectural decisions while mentoring engineers and driving engineering standards across the team. The Role Lead the design and development of backend services using Node.js and TypeScript Own and evolve an event-driven architecture , leveraging Kafka for asynchronous communication Make key architectural decisions around scalability, performance and reliability ...

Role: Senior Backend Developer Type:Fixed Term Employment (1year) Location: UK (Remote) Client:Tavant Technologies Mandatory Skills - Java, Spring Boot Experience 8+ years Job Description We are looking for a Senior Backend Developer with strong experience in Java, Spring Boot, microservices architecturesto xxuwjjq design, build … scale backend systems in a cloud-native environment. The role requires a hands... Candidates should take the time to read all the elements of this job advert carefully Please make your application promptly. ...

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 Backend Engineer 📍 London (Hybrid) 🚀 Early-Stage | AI Platform | Enterprise-Grade Systems We’re partnering with an ambitious early-stage AI company building a challenge-based interview intelligence platform. The product replaces CV-noise with real signal — evidence from real work and real human capability. They’re in full … build mode toward launch. Small team. High standards. High ownership. No corporate theatre. They’re hiring a Senior Backend Engineer to build the enterprise backbone of the platform — high-concurrency APIs, event-driven systems, and reliability foundations that transform complex hiring inputs into secure, trusted, GDPR-safe outputs. ...

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 ...

Senior Backend Engineer, London, £60,000 - £75,000 + Benefits A Senior 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 … 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 Senior Backend Engineer (Full Stack ...

skills can be applied meaning a vast array of opportunities are now available to you. Examples of some of these are listed below: - Junior Developer Website Support Developer Junior Web Developer Content Editor Wordpress Developer Junior Software Developer Junior Front or Back End Development Development ...

operate like a top-tier creative engineering studio: small team, high taste, high ownership, no corporate theatre. We’re hiring a Senior Backend Engineer to build the enterprise backbone: high-concurrency APIs, event-driven systems, and reliability foundations that turn messy hiring inputs into trusted signal : fast, secure, GDPR ...

scientists and chemists. All positions at CheMastery come with an extraordinary level of freedom to showcase your skill . Description The position as a Backend Python Developer is a permanent full-time position. As a Python Developer you will have be part of a brilliant software ...

Senior Backend Engineer/Head of Backend Development (Python/AWS) Fintech | NYC (Remote) | No C2C | Full-time role Compensation : £90,000–£120,000 (negotiable for star talent upon tech test) We are working with a well-funded fintech platform transforming how complex financial data flows across global … products. ● Shape the architecture, cloud strategy, and engineering culture of a venture-backed fintech at an early stage. The Role This is a senior backend role focused on designing and scaling the core engine that powers ingestion, validation, and distribution workflows. The environment demands production-grade reliability, security ...

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/ ...

Back-End Developer (Go) 📍 Location: London (2 days onsite) 📅 Contract: 12 Months (Extension Possible) 💼 Experience: 3–5+ Years About the Role We are looking for an experienced Back-End Developer with strong expertise in Go (Golang) to build scalable, high-performance backend systems. You will design APIs … deployed on AWS cloud infrastructure. This role is ideal for someone passionate about data-driven systems, cloud-native architecture, and performance optimization. Key Responsibilities Backend Development Develop and maintain scalable backend services using Go (Golang). Design and implement RESTful APIs and GraphQL endpoints. Build APIs for data ...

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 ...

Senior Backend Engineer £80,000 – £110,000 | London (Hybrid – 3 days in office) The Opportunity We’re partnered with a scaling, venture-backed SaaS business delivering a mobile-first platform used by large distributed workforces across global enterprise organisations. This is not greenfield development and it’s not legacy … with strong product traction, enterprise customers, and continued platform evolution across both technical and commercial areas. You’ll be joining an organisation solving complex backend and platform engineering challenges at scale, supporting a product that is already widely adopted while helping shape its future architecture. The Product The platform ...

maintain high-performance services using C# and ASP.NET Core. Implement asynchronous patterns and background processing using Hangfire. Integrate AI model APIs into existing backend architectures. Address and mitigate security challenges across the full application stack. Required Skills and Experience Deep expertise in C#, ASP.NET Core, and dependency injection. Strong ...

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 … Terraform • Implementing CI/CD pipelines (GitHub Actions, GitLab, Jenkins, ArgoCD) • Shipping production-grade cloud-native applications 🎯 𝗪𝗵𝗮𝘁 𝗪𝗲’𝗿𝗲 𝗟𝗼𝗼𝗸𝗶𝗻𝗴 𝗙𝗼𝗿 👉 Strong Python backend development experience 👉 API development (FastAPI highly desirable) 👉 Solid SQL/PostgreSQL knowledge 👉 AWS experience (EKS ideal) 👉 Kubernetes deployment experience 👉 Terraform (Infrastructure as Code ...

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 ...

Back End Developer/SRE (Java JVM) London/WFH to £110k Are you a Back End Developer/SRE with a strong knowledge of Java and JVM internals? You could be progressing your career in an impactful role at a global Fintech that has been consistently voted … organising events and projects that foster an open, diverse and inclusive culture Plus a range of other perks Your role: As a Back End Developer/SRE you will collaborate with development teams, as a trusted technical advisor to influence system design, ensuring reliability standards and driving improvements across ...

high shipping velocity while ensuring 99.9% uptime for our global users. What We're Looking For Technical Excellence: You bring battle-hardened experience in backend development with Node.js or Python, and you are comfortable navigating microservices and cloud-native infrastructure. A Drive to Own It: You thrive in ambiguity ...