14 full stack developer jobs found in London

GraphQL Full Stack Engineer - TypeScript | Node.js| Contract (Outside IR35) Location: West London (Hybrid - 2 days/week on site) Contract: 6 months initial (extensions highly likely) Start: ASAP Eligibility: UK-based candidates only Rate: Market rates GraphQL-focused Software Engineer who can design, implement, and evolve high-performing APIs that scale. If crafting elegant GraphQL schemas, building robust TypeScript/Node.js services, and deploying to cloud-native environments is your idea of fun, this is your next project. The Role Design & develop GraphQL API services from schema, supergraph, subgraph, GraphQL federation, design to production integration, ensuring performance, flexibility, and maintainability. Build scalable TypeScript, Node.js services that integrate seamlessly with modern frontends and data sources. Apply DevOps best practices to deliver through CI/CD pipelines (Jenkins, Concourse), Docker, Helm, and Kubernetes....

GraphQL Full Stack Engineer - TypeScript | Node.js| Contract (Outside IR35) Location: West London (Hybrid - 2 days/week on site) Contract: 6 months initial (extensions highly likely) Start: ASAP Eligibility: UK-based candidates only Rate: Market rates GraphQL-focused Software Engineer who can design, implement, and evolve high-performing APIs that scale. If crafting elegant GraphQL schemas, building robust TypeScript/Node.js services, and deploying to cloud-native environments is your idea of fun, this is your next project. The Role Design & develop GraphQL API services from schema, supergraph, subgraph, GraphQL federation, design to production integration, ensuring performance, flexibility, and maintainability. Build scalable TypeScript, Node.js services that integrate seamlessly with modern frontends and data sources. Apply DevOps best practices to deliver through CI/CD pipelines (Jenkins, Concourse), Docker, Helm, and Kubernetes....

Senior Full-Stack Developer (.NET & React) Hybrid - Slough Contract - £600/day Outside IR35 We're partnering with a highly confidential, high-growth SaaS scale-up based in Slough that is expanding its engineering capability as it continues to scale its core product offering. PLEASE NOTE THAT THIS ROLE REQUIRES 2-3 DAYS A WEEK IN THE OFFICE. You'll join a 20-strong engineering team made up of permanent and contract developers, working in a collaborative, product-led environment with genuine autonomy and ownership. The Role Deliver full-stack features across .NET/.NET Core backend services and React front-end applications Contribute to architectural decisions and technical direction Write clean, maintainable, testable code Drive engineering best practice, CI/CD, and performance optimisation Collaborate closely with Product and UX in a modern agile setup What We're Looking For Strong commercial experience with C#/.NET Core Solid...

Contract Full-Stack JavaScript Developer Location: Fully Remote Duration: 3 Months IR35 Status: Outside IR35 Rate: £500p/d - £550p/d Opus is partnering with a specialist data & analytics company to secure a Contract Full-Stack JavaScript Developer. You will be working in a small team (3-4 developers) across the full-stack. If you're passionate about clean code, scalable architecture, and modern tooling—this one's for you! Tech Stack React.js Next.js Node.js TypeScript AWS Interested? Apply now or send your latest CV to (see below) ASAP! If you haven't heard back within 48 hours, please assume your application was not successful this time.

🚀 Contract Full-Stack JavaScript Developer📍 Location: Fully Remote📆 Duration: 3 Months💼 IR35 Status: Outside IR35💰 Rate: £500p/d - £550p/dOpus is partnering with a specialist data & analytics company to secure a Contract Full-Stack JavaScript Developer. You will be working in a small team (3-4 developers) across the full-stack. If you're passionate about clean code, scalable architecture, and modern tooling—this one's for you!🛠️ Tech Stack React.js Next.js Node.js TypeScript AWS 📩 Interested?Apply now or send your latest CV to (url removed) ASAP!If you haven’t heard back within 48 hours, please assume your application was not successful this time.

Full Stack .NET Developer | £600 Outside IR35 | 2 days per week on site in Milton Keynes | Active SC clearance required The Role We are looking for experienced Full-Stack .NET Engineers with a background in data-centric projects to join our consultancy team, deployed directly into high-profile public sector departments. You will be a key member of a multidisciplinary delivery team, responsible for both front and Back End development of the digital services that power essential public functions. In this role, you will bring a data-centric engineering mindset to the development lifecycle. You will be responsible for building robust, data-driven applications that handle complex logic and large datasets with precision. Your expertise will ensure that data is captured, processed, and surfaced securely and efficiently, adhering to modern standards for data integrity and performance within the .NET ecosystem. The role involves embedding yourself within the client's engineering...

Contract Full Stack Java Developer (React Focus) – Financial Services - London Contract Length: 12 Months Rate: £350 per day IR35 Status: Outside IR35 Overview We are seeking an experienced Full Stack Developer to join a London-based financial services organisation on a 12-month contract. This role will have a strong focus on React frontend development , while also contributing to backend services built using Java 21+, Spring Boot, and Microservices architecture . You will be working within a cloud-native, event-driven environment, delivering responsive trading and financial applications used in a fast-paced, regulated setting. This is a hands-on role suited to engineers who are confident owning frontend delivery while collaborating on robust backend services. Key Responsibilities Lead development of modern, high-performance React applications Build responsive, reusable UI components aligned with financial product requirements Integrate...

Job Title: Full Stack Developer (TypeScript / React / Node.js) – SC Cleared Location: Hybrid (UK-based) 1/2 days per month Rate: £550–£600 per day (Outside IR35) Contract Length: 6 months initially Start Date: 2nd March 🚀 The Opportunity We are seeking an experienced Full Stack Developer with active SC Clearance to join a high-profile programme delivering secure, scalable digital solutions within a government-facing environment. This is a 6-month contract (initially), paying £550–£600 per day Outside IR35 , with an immediate start on 2nd March . 🛠️ Key Skills & Experience Essential: Strong commercial experience with TypeScript and JavaScript Advanced front-end development using React Back-end development with Node.js Experience building and consuming RESTful APIs Solid understanding of modern software engineering best practices Experience working in Agile/Scrum environments Active SC Clearance (mandatory)...

Senior Full-Stack Developer (.NET & React) Hybrid – Slough Contract – £600/ day Outside IR35 We’re partnering with a highly confidential, high-growth SaaS scale-up based in Slough that is expanding its engineering capability as it continues to scale its core product offering. You’ll join a 20-strong engineering team made up of permanent and contract developers, working in a collaborative, product-led environment with genuine autonomy and ownership. The Role Deliver full-stack features across .NET / .NET Core backend services and React front-end applications Contribute to architectural decisions and technical direction Write clean, maintainable, testable code Drive engineering best practice, CI/CD, and performance optimisation Collaborate closely with Product and UX in a modern agile setup What We’re Looking For Strong commercial experience with C# / .NET Core Solid hands-on experience with React API design and integration...

Senior Software Engineer - Node & React Remote with very occasional client visits £420 - £440pd Outside IR35 3-month contract Our client, an established and successful Consultancy are looking for an experienced Developer to join them on a contract basis. With head offices in the north of the UK and branches spreading across the globe, they're a dynamic technology consultancy leader with a dedicated team of professionals, partnering with sector leaders This is a completely hands-on role where you will develop and maintain scalable, full-stack web applications using Next.js and Node.js We are looking for: Demonstrable and proven experience in full-stack applications (inc. working knowledge of a range of technologies such as React, Node.js and TypeScript). Experience with Azure and ARM templates including dev and deployment of supporting cloud infrastructure (inc. pipelines). Excellent, in-depth understanding of BDD, TDD and SOLID principles. In-depth...

Software Engineer - Node & React Remote with very occasional client visits £400 - £420pd Outside IR35 3-month contract, potential for extension Our client, an established and successful Consultancy are looking for a number of experienced Developers to join them on a contract basis With head offices in the north of the UK and branches spreading across the globe, they're a dynamic technology consultancy leader with a dedicated team of professionals, partnering with sector leaders This is a completely hands-on role where you will develop and maintain scalable, full-stack web applications using Next.js and Node.js We are looking for: Demonstrable and proven experience in full-stack applications (inc. working knowledge of a range of technologies such as React, Node.js and TypeScript). Experience with Azure and ARM templates including dev and deployment of supporting cloud infrastructure (inc. pipelines). Excellent, in-depth understanding of BDD, TDD and SOLID...

Mid-Level Android Developer – Hybrid – up to £550 per day Outside IR35 | Kotlin | Jetpack Compose | FinTech A renowned, funded and profitable challenger bank is looking for a Mid-Level Android Developer to join their mobile engineering team. The business offers a flexible current account product with features such as expense categorisation, instant payment notifications, and clear, accessible financial insights. Fully integrated with a mobile app, users can manage account settings, freeze or unfreeze cards, and set savings goals directly from their phone. 📍 Location: London City 🏢 Hybrid: 2–3 days onsite per week 💰 Day Rate: Up to £500 per day Outside IR35 The Role As a Mid-Level Android Developer, you will contribute to the ongoing development and enhancement of the Android application, working within an established architecture and alongside senior engineers. You’ll help deliver new features, improve existing functionality, and maintain a clean,...

🚀 Contract Python Developer 📍 Location: Fully Remote 📆 Duration: 6 Months 💼 IR35 Status: Outside IR35 💰 Rate: £450pd - £550pd Opus is partnering with a specialist consultancy to secure a Contract Python Developer. You will be working across the full-stack. If you're passionate about clean code, scalable architecture, and modern tooling—this one's for you! 🛠️ Tech Stack Python Django FastAPI AWS Lambdas 📩 Interested? Apply now or send your latest CV to (url removed) ASAP! If you haven’t heard back within 48 hours, please assume your application was not successful this time.

Our client is looking for a Data Scientist/Engineer to work on an initial 6 month Outside IR35 contract. This would be a fully onsite position in Milton Keynes with the potential of hybrid working in the future. Candidates would require an SC Clearance and be prepared to go through a DV Clearance. Key Qualifications * Must have proficient skills working on Large Language Models (LLMs). * Proficiency in evaluating, deploying and using on premise open source technology stacks. * Proficiency in Azure Cognitive Services, which includes Azure Language Service, Azure Text Analytics, Azure Speech Service, and other AI-related offerings. * A good understanding of OpenAI's GPT models and how it integrates with Azure services. This includes knowledge of GPT's capabilities, limitations, and available features. * Strong programming skills in Python for working with Azure services and data manipulation. * Good understanding of databases eg Postgres * Proficient knowledge of Back End...