11 senior javascript engineer jobs found in London

Leading eCommerce client now requires a Full Stack JavaScript Engineer to contribute towards the design and development of their evolving digital ecosystem. You will work across their front and Back End applications delivering features and improvements to support their digital roadmap. Key Requirements: Strong hands-on Full Stack development skills - React.js, Next.js, Node.js and TypeScript. Heavy hands-on testing experience (TDD, DDD). Extensive experience developing APIs/Event driven architectures and working with cloud technologies such as AWS. GraphQL/Nest.js experience Used to working in a scrum based agile team. Excellent communication skills with the ability to work autonomously and hit the ground running. This is an initial 6-month contract role which provides a daily rate of £575 (Outside IR35). In terms of working structure, this is hybrid with 1 day per week in their London office and the rest remote.

React Native Engineer/React Native Developer/Senior React Native Developer/Senior Mobile Developer - React Native We've partnered with well known FinTech who are on a complex transformation programme across their mobile apps, web platform and entire technology stack. They want to improve the functionality of a couple of their core products on their mobile app. So we are looking for experienced React Native Developer to join this major digital transformation programme. You'll play a key role in enhancing and modernising mobile applications across iOS and Android , delivering new features, improving performance, and helping create a seamless customer experience. Key Responsibilities Develop and enhance mobile applications using React Native . Deliver new functionality and improve existing user journeys across iOS and Android platforms. Work closely with Product, UX/UI, Engineering, and QA teams to deliver high-quality solutions. Optimise application performance,...

React Native Engineer / React Native Developer / Senior React Native Developer / Senior Mobile Developer - React Native We 've partnered with well known FinTech who are on a complex transformation programme across their mobile apps, web platform and entire technology stack. They want to improve the functionality of a couple of their core products on their mobile app. So we are looking for experienced React Native Developer to join this major digital transformation programme. You 'll play a key role in enhancing and modernising mobile applications across iOS and Android , delivering new features, improving performance, and helping create a seamless customer experience. Key Responsibilities Develop and enhance mobile applications using React Native . Deliver new functionality and improve existing user journeys across iOS and Android platforms. Work closely with Product, UX/UI, Engineering, and QA teams to deliver high-quality solutions....

Senior AWS DevOps Engineer | Outside IR35 | Remote We are looking for an experienced DevOps Engineer to support a public sector project involving multi-cloud infrastructure, Kubernetes platforms and reusable platform capabilities across AWS, Azure and GCP. The Role You will help design, deploy and operate secure cloud-native infrastructure across multiple cloud providers. The environment includes Terraform, Kubernetes, GitOps tooling, service mesh technologies, cloud networking and event-driven microservices. Key Responsibilities Deploy and manage infrastructure across AWS, Azure and GCP using Terraform. Build and operate Kubernetes platforms across EKS, AKS and GKE. Design and implement CI/CD and GitOps pipelines using GitHub Actions and Flux. Configure cloud networking, API gateways, identity and security controls. Implement operational monitoring, alerting and observability solutions. Automate platform processes and support event-driven microservice architectures....

🚨 Senior Playwright SDET | £700/day | Outside IR35 | Front Office Trading | London I'm working with a leading global investment bank looking to hire an exceptional Playwright SDET to join their Front Office Derivatives Technology team. This isn't your typical automation role. You'll be embedded within a high-performing engineering team, working directly alongside developers on a strategic front end trading platform. The rate reflects the calibre of engineer they're looking for. 💰 Package £700 per day Outside IR35 12-month rolling contract 1 day per week in the London office What they're looking for This role is suited to a highly technical SDET who is passionate about automation and enjoys writing production-quality code. You must have: ✅ Strong commercial experience with Playwright ✅ Excellent coding skills in JavaScript and TypeScript ✅ Experience building and maintaining automation frameworks ✅ Previous experience working on...

Computer Vision Engineer – Semi remote - London - £80 per hour - outside IR35 Hexwired Recruitment is currently hiring for a rapidly expanding R&D company developing bespoke Simulation solutions in London. They're now seeking a Computer Vision Engineer with a solid understanding of Neural Network applications to be used in a range of novel cybersecurity applications. The company are working with a range of diverse customers so this is an excellent opportunity for someone seeking a challenging and rewarding role in data science. This a senior role within the business and there is scope to grow as the company expands! As a Computer Vision Engineer, you will be working extensively with Neural Networks to develop a range of products and solutions. This is an Outside IR35 contract, semi remote in London and will be an initial 5 months with likely extension. Key Skills: Masters or PhD in Machine Learning, Physics or Similar 4+ years commercial Machine...

Full Stack Developer (Outside IR35) Contract Length: 6 Months Location: London (Remote) Hours: 40 Hours per Week Start Date: ASAP Overview Our client, a leading organisation within the insurance sector, is seeking an experienced Full Stack Frontend Developer to support the delivery of modern digital platforms and customer-facing applications. This role will focus on building intuitive, scalable, and high-performance user interfaces that support key insurance services, including customer portals, policy management, underwriting workflows, and claims-related journeys. Working within a cross-functional product team, you'll collaborate closely with backend engineers, architects, UX designers, and business stakeholders to deliver secure, data-driven solutions in a highly regulated environment. Tech Stack Frontend React TypeScript JavaScript (ES6+) HTML5 CSS3 Backend Exposure Node.js REST APIs GraphQL Nice to Have Next.js AI integrations...

Full Stack Engineer (LLM/AI) £450 per day | Outside IR35 | 3-6 Month Contract | Hybrid (London) - 2 days onsite | ASAP Start Our trusted EdTech partner, supporting over 600 million users across 100 countries, is looking for an experienced Full Stack Engineer to help deliver the next generation of AI-powered language learning and assessment products. You'll be a hands-on engineer with strong Python, React, JavaScript/TypeScript and AWS experience, developing scalable cloud-native applications and integrating AI capabilities into production systems. Recent experience developing Chat or Messaging applications within the Education or Learning sector is essential. Key Responsibilities: Develop and maintain scalable full-stack applications using Python, React and AWS. Contribute to technical architecture, solution design and engineering best practice. Build high-quality, secure and performant software through short delivery iterations. Collaborate with Product, Design, QA...

Full Stack Engineer (LLM/AI) £450 per day | Outside IR35 | 3-6 Month Contract | Hybrid (London) - 2 days onsite | ASAP Start Our trusted EdTech partner, supporting over 600 million users across 100 countries, is looking for an experienced Full Stack Engineer to help deliver the next generation of AI-powered language learning and assessment products. You 'll be a hands-on engineer with strong Python, React, JavaScript/TypeScript and AWS experience, developing scalable cloud-native applications and integrating AI capabilities into production systems. Recent experience developing Chat or Messaging applications within the Education or Learning sector is essential. Key Responsibilities: Develop and maintain scalable full-stack applications using Python, React and AWS. Contribute to technical architecture, solution design and engineering best practice. Build high-quality, secure and performant software through short delivery iterations. Collaborate...

UI Architect Global Financial Services/Payments Client Location: London - 2 days per week Rate: £550-£570 per day Contract: 6 months initial IR35 Status: Outside IR35 Role Overview We are supporting a global financial services organisation operating in cross-border payments and emerging markets as they continue a large-scale technology transformation. They are looking for an experienced UI Architect to lead the design and delivery of scalable, modern Front End platforms aligned to a microservices architecture. This is a hands-on architecture role with responsibility for defining standards, driving best practice and shaping the Front End ecosystem across multiple products. Key Responsibilities Define and own Front End architecture across a microservices-based platform Design scalable UI solutions aligned to API-first Back End services Establish reusable components, UI standards and enterprise design systems Define integration approaches with RESTful and...

Full Stack Developer (Outside IR35) Contract Length: 6 Months Location: London (Remote) Hours: 40 Hours per Week Start Date: ASAP Overview Our client, a leading organisation within the insurance sector, is seeking an experienced Full Stack Frontend Developer to support the delivery of modern digital platforms and customer-facing applications. This role will focus on building intuitive, scalable, and high-performance user interfaces that support key insurance services, including customer portals, policy management, underwriting workflows, and claims-related journeys. Working within a cross-functional product team, you'll collaborate closely with backend engineers, architects, UX designers, and business stakeholders to deliver secure, data-driven solutions in a highly regulated environment. Tech Stack Frontend React TypeScript JavaScript (ES6+) HTML5 CSS3 Backend Exposure Node.js REST APIs GraphQL Nice to Have Next.js AI integrations (OpenAI, Azure AI, or similar) Essential...