19 rust developer jobs found in London

Role Summary Wagglyn is looking for an experienced QA Engineer / Test Lead to work with the existing engineering team on the testing and release readiness of its MVP trading platform. This is a hands-on contract role for someone who has tested complex financial or real-time systems before. It is not a generic web QA role and not a manual-testing-only role.   Scope The contractor will help define and execute the QA process across the front end, backend services, market data, execution flows, deployment environments and operational readiness. The role involves working with engineering, product and stakeholders to make sure releases are testable, repeatable and safe to promote through UAT and production-like environments. QA here is about proving the system behaves safely when data is live, services reconnect, orders are sent, risk state changes and deployments happen.   Profile ·      Hands-on QA engineer who has tested complex financial or real-time systems ·...

This role is delivered within secure environments. Candidates must be eligible for UK SC clearance and hold UK citizenship. Join the Mission At ByDesign Secure, we believe that world‑class security shouldn't be an afterthought— it should be the foundation. We are an independent, outputs‑based consultancy dedicated to solving the most complex data assurance challenges in the UK public sector. Currently, we are working on a landmark transformation of a cross‑government secure IT system. This is an exciting opportunity to contribute to the design and consumption of a private cloud environment from the ground up and help modernise the end‑user services that support national decision‑making. We don’t believe in “billing by the hour” or rigid hierarchies; we are a lean, expert team focused on delivering high‑impact outcomes. If you are a self‑starter who thrives on autonomy and wants to see your analysis, insights, and business decisions shape the future of sovereign security, we...

This role is delivered within secure environments. Candidates must be eligible for UK SC clearance and hold UK citizenship. Join the Mission At ByDesign Secure, we believe that world‑class security shouldn't be an afterthought— it should be the foundation. We are an independent, outputs‑based consultancy dedicated to solving the most complex data assurance challenges in the UK public sector. Currently, we are working on a landmark transformation of a cross‑government secure IT system. This is an exciting opportunity to contribute to the design and consumption of a private cloud environment from the ground up and help modernise the end‑user services that support national decision‑making. We don’t believe in “billing by the hour” or rigid hierarchies; we are a lean, expert team focused on delivering high‑impact outcomes. If you are a self‑starter who thrives on autonomy and wants to see your analysis, insights, and business decisions shape the future of sovereign security, we...

This role is delivered within secure environments. Candidates must be eligible for UK SC clearance and hold UK citizenship. Opening: Join the Mission At ByDesign Secure, we believe that world-class security shouldn't be an afterthought—it should be the foundation. We are an independent, outputs-based consultancy dedicated to solving some of the most complex technology and security challenges within the UK public sector. We are currently supporting a landmark transformation of a cross-government secure IT system, helping to build and modernise critical digital services, cloud platforms, infrastructure capabilities, and workplace technologies that underpin national decision-making. We don't believe in rigid hierarchies or billing by the hour. We are a lean, expert team focused on delivering meaningful outcomes in highly secure environments. If you are passionate about Agile delivery, servant leadership, and helping teams achieve their full potential, we would love to hear...

Job Title: Senior Boomi Developer Client: Public Sector Location: Hybrid London or Birmingham, 2 days per week onsite Engagement Type: Contract (Outside IR35) Day Rate: Up to £600 per day Clearance: Active SC Clearance required About the role A public sector client is seeking an experienced Senior Boomi Developer to join a high-profile integration programme on an initial contract basis. This is a hands-on, end-to-end role covering the design, build, deployment, and ongoing support of integration processes that underpin business-critical services. This is a hybrid role combining onsite collaboration with remote working you'll be based at either the London or Birmingham site for 2 days per week, with the specific site confirmed during the process. Key responsibilities Lead hands-on design, development, deployment, and maintenance of integration processes using the Boomi AtomSphere platform, including Cloud Integration, Application Integration, and API...

Web Developer - (React, TypeScript & C#/.NET) We are looking for a Web Developer with strong React and TypeScript experience and some knowledge of C# and .NET to join a development team on an initial 12-month contract. Responsibilities Develop and maintain web applications using React and TypeScript. Contribute to Back End development using C# and .NET. Create and maintain automated tests. Review pull requests and support code quality standards. Perform integration testing and bug fixing. Update tasks and testing information within Azure DevOps. Produce and maintain technical documentation. Participate in Agile ceremonies including stand-ups, sprint planning, estimation sessions, and retrospectives. Support DevOps pipelines and deployment activities. Attend team meetings as required. Required Skills Commercial experience with React and TypeScript. Knowledge of C# and .NET. Experience with Git and source control. Understanding of...

Web Developer - (React, TypeScript & .NET) - Hybrid - Outside IR35 We are looking for a Web Developer with strong React and TypeScript experience and some knowledge of C# and .NET to join a development team on an initial 12-month contract. Responsibilities Develop and maintain web applications using React and TypeScript. Contribute to backend development using C# and .NET. Create and maintain automated tests. Review pull requests and support code quality standards. Perform integration testing and bug fixing. Update tasks and testing information within Azure DevOps. Produce and maintain technical documentation. Participate in Agile ceremonies including stand-ups, sprint planning, estimation sessions, and retrospectives. Support DevOps pipelines and deployment activities. Attend team meetings as required. Required Skills Commercial experience with React and TypeScript. Knowledge of C# and .NET. Experience with...

React Native Developer – Contract London (Hybrid) | Outside IR35 About the Company Our client is a fast-growing fintech building the next generation of financial products. With a product-first culture and a strong engineering ethos, they're on a mission to make financial services smarter, faster, and more accessible. You'll be joining a lean, high-calibre team where your work ships and your impact is visible. The Role We're looking for an experienced React Native Developer to join our client on a contract basis. You'll be working across a consumer-facing mobile product, contributing to feature development, performance improvements, and technical delivery within an agile environment. This is a hands-on engineering role suited to someone who takes ownership, moves quickly, and holds their own in a strong technical team. What You'll Be Doing Building and shipping features across iOS and Android using React Native Collaborating closely with product,...

Java Developer Location: London (3 days per week onsite) Duration: 12-Month Contract Rate: Up to £300 per day Outside IR35 Start Date: Immediate Start/ASAP We're currently supporting a major global financial services organisation as they continue to grow their engineering teams and are looking to engage multiple Mid-Level Java Developers for long-term contract assignments based in London. This is an opportunity to work within a modern software engineering environment, contributing to the design, development and delivery of enterprise-scale applications used by millions of customers worldwide. Key Responsibilities Design, develop and maintain Java-based applications using Java 11+ Build and enhance scalable microservices and distributed systems Develop and consume RESTful APIs Write clean, maintainable and testable code following engineering best practices Contribute to automated testing and test-driven development initiatives Collaborate...

Job Opportunity: Senior C# Quantitative Risk Developer | Capital Markets Technology Location: London Type: Full-time/Contract Rate: UPTO £850 p/d (Outside IR35) Client: Leading Global Investment Bank Hybrid: 1 day per week in the office Are you ready to be at the forefront of technology and finance? Our client, a top-tier investment bank, is looking for a Senior C# Quantitative Risk Developer to join their high-impact Capital Markets Technology team in London. This is a unique opportunity to bridge the worlds of quantitative analysis and software engineering-delivering cutting-edge solutions to drive pricing, risk management, and liquidity strategies in Real Time trading environments. About the Role As a Senior Quantitative Developer, you'll collaborate closely with quantitative analysts, traders, and fellow technologists to develop and optimize core components of the bank's pricing, risk and valuations infrastructure. You'll be responsible for translating complex...

Senior Flutter Developer - Outside IR35 - Contract A rare opportunity to join our fast-growing technology company selling high-value software development services. An ideal role for an experienced and dynamic developer who wants to be involved with an exciting and challenging project. Must have Several years of experience developing customer-facing mobile apps for both iOS and Android, using Flutter. Experience working as part of a team (including tools to support collaboration, such as git and user story management software) Experience working closely with other job roles, such as designers and product owners Nice to have Experience with mobile back-end development / Node Experience of CI/CD/DevOps for mobile apps Experience collaborating with clients or stakeholders, including clarifying requirements and presenting work at sprint demos Have experience delivering great outcomes for clients in an agency or professional services firm Your...

Job Title: Senior Boomi Developer Client: Public Sector Location: Hybrid London or Birmingham, 2 days per week onsite Engagement Type: Contract (Outside IR35) Day Rate: Up to £600 per day Clearance: Active SC Clearance required About the role A public sector client is seeking an experienced Senior Boomi Developer to join a high-profile integration programme on an initial contract basis. This is a hands-on, end-to-end role covering the design, build, deployment, and ongoing support of integration processes that underpin business-critical services. This is a hybrid role combining onsite collaboration with remote working you'll be based at either the London or Birmingham site for 2 days per week, with the specific site confirmed during the process. Key responsibilities Lead hands-on design, development, deployment, and maintenance of integration processes using the Boomi AtomSphere platform, including Cloud Integration, Application Integration, and API...

Leading eCommerce/travel client now requires a Full Stack JavaScript Developer with strong React, React Native and Node.js knowledge to assist in the development of their IOS and Android application, which experiences some of the highest traffic across Europe. This is a Full Stack role positioned in a mobile team with the use of React Native. Essential Technical Skills/Experience: React Native Full Stack JavaScript experience (Essential) GraphQL experience Experience in building mobile apps Amazon Bedrock or Agentcore experience is preferred. Experience with IOS and Android application development Front-end skills (HTML5 / CSS3 / JavaScript / Ajax) Experience using code version control systems (GIT) Experience building responsive websites and applications Experience of integrating with web services and APIs, including REST endpoints In terms of office location, this role is based in Central London with 1 day per week in office and the rest working...

Project / Programme Management - eDV Cleared Contractors Required 📍 London OR the SouthWest (Hybrid – Client Site up to 2 Days per Week) 💰 £550–£750 per day Outside IR35 (Dependent on experience, clearance status and assignment) ⏳ Long-Term Engagements (12+ Months) Security Clearance Requirement Active UK Government eDV (Enhanced Developed Vetting) clearance is essential. Candidates whose eDV clearance has lapsed within the last 9 months may also be considered, subject to transferability and client approval. The Opportunity We are supporting internal teams who are delivering transformation programmes across National Security, Defence and Critical National Infrastructure environments. You will work alongside some of the UK's most secure and operationally sensitive organisations, helping clients solve complex business, operational and technology challenges. The focus is firmly on delivery, this is an opportunity to join programmes that are developing...

Job Opportunity: Senior C# Quantitative Risk Developer | Capital Markets Technology Location: London Type: Full-time/Contract Rate: UPTO £750 p/d (Outside IR35) Client: Leading Global Investment Bank Hybrid: 1 day per week in the office Are you ready to be at the forefront of technology and finance? Our client, a top-tier investment bank, is looking for a Senior C# Quantitative Risk Developer to join their high-impact Capital Markets Technology team in London. This is a unique opportunity to bridge the worlds of quantitative analysis and software engineering-delivering cutting-edge solutions to drive pricing, risk management, and liquidity strategies in Real Time trading environments. About the Role As a Senior Quantitative Developer, you'll collaborate closely with quantitative analysts, traders, and fellow technologists to develop and optimize core components of the bank's pricing, risk and valuations infrastructure. You'll be responsible for translating complex...

Java Developer - Java, React, Springboot £market rate (Outside IR35) Glasgow/5 days a week onsite 6 months initially My client is seeking experienced Java Developers to join a dynamic delivery team building modern, scalable applications. This role will suit candidates with strong full-stack capability, combining Back End Java development with modern Front End technologies such as React. You will work across microservices architecture, contributing to both design and delivery in an Agile environment. Key requirements: Strong Java (8+), Spring Boot & Spring MVC experience Experience building REST APIs & microservices Full-stack capability: React, JavaScript, HTML5, CSS/SCSS Knowledge of JEE (JSF, JPA, Servlets, JDBC) Experience with CI/CD (Jenkins, Maven) and Git Agile/Scrum environment experience Familiar with IntelliJ (or similar IDEs) Understanding of TDD & automated testing Strong collaboration across product, QA & engineering teams...

Java Developer - Java, Mulesoft, Springboot £market rate (Outside IR35) Glasgow/5 days a week onsite 6 months initially My client is looking for for Java Developers with strong Back End and integration experience to support the development of scalable, API-driven systems. This role will focus on Back End services, microservices architecture, and integration using MuleSoft, making it ideal for developers who enjoy working on complex system integrations and enterprise platforms. Key Requirements Strong Java (8+) with Spring Boot/Spring Experience with microservices & REST APIs Hands-on MuleSoft (Mule 4) - Anypoint Platform, API development, JSON/XML Understanding of integration patterns & architecture Experience with CI/CD and Git Knowledge of TDD & automated testing Agile/Scrum experience Strong collaboration skills Nice to Have Full-stack or Front End exposure (JSF) AWS/cloud experience Tools: Gradle, Ansible, GoCD Databases: Oracle, MongoDB...

Senior .NET / Vue 3 Developer - Outside IR35 Pay Rate: up to £475 per day - Outside IR35 Working Arrangement: Hybrid (Central London) - 1-2 days per week Duration: 6-Months initial (Extension Likely) A large growing fintech is looking for an experienced Senior .NET / Vue 3 Developer to join their team as they scale their mortgage platform, used by major real estate and property firms. Following recent client wins, the business is expanding and investing heavily in its engineering capability, offering a great opportunity to join at a key growth phase The Role You 'll play a hands-on role delivering new features and enhancements across a core platform in the mortgage and property space. This is a full-stack position with strong ownership, working across both frontend and backend in a modern cloud environment. Tech Stack Backend: .NET Frontend: Vue 3 Requirements Strong experience with .NET (backend development)...

Full Stack Developer - Outside IR35 - Contract - SC ESSENTIAL A rare opportunity to join our fast-growing technology company selling high-value software development services. You will be working within a Government department as part of an existing team to support the rollout of a new Database. Must have Kotlin (or, less preferably, Java) Spring GDS design system Nice to have AWS Terraform Thymeleaf Your approach You are passionate about delivering great technical quality, whether building greenfield solutions or improving the quality of legacy systems You hold your work to a high standard, with careful attention to visual quality, accessibility, and performance. You are excited by helping stakeholders achieve their goals through use of technology You enjoy collaborating with designers and product owners to innovate and devise great technical solutions to meet user needs You are comfortable with ambiguity and fast-paced, changing...