> Markdown version of [/jobs/ext/54359-react-ui-senior-lead-engineer-synergy-emea](https://www.wearedevelopers.com/jobs/ext/54359-react-ui-senior-lead-engineer-synergy-emea). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # React UI Senior Lead Engineer - Synergy EMEA - **Company:** JPMorganChase - **Location:** London, UK - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), Artificial Intelligence, Cloud Computing, Software Quality, Code Review, Continuous Delivery, Continuous Integration, Software Debugging, Python (Programming Language), Software Engineering, Software Systems, TypeScript, Web Applications, Web Performance Optimization, Performance Testing, ReactJS, Cypress (Programming Language), Webpack, Production Code, Build Tools - **Published:** May 21, 2026 - **Apply:** https://uk.indeed.com/viewjob?jk=5876eed250e36042 ## About the Role Do you have experience in TypeScript?, * Formal training or certification in software engineering, with advanced proficiency in React. * Strong experience with automation and continuous delivery (CI/CD) methodologies. * Comprehensive understanding of the Software Development Life Cycle. * Advanced knowledge of agile practices, including CI/CD, application resiliency, and security. * Demonstrated expertise in software development and technical processes, with exposure to areas such as cloud, AI/ML, or mobile technologies. * Hands-on experience building complex web applications using React and Typescript. * Familiarity with modern web build tools (e.g., webpack, Create React App, Vite). * Proven ability to develop secure, high-quality production Typescript code. * Commitment to code quality, including writing and maintaining test cases with frameworks such as Jest, Cypress, and @testing-library/react, as well as conducting performance testing. * Solid understanding of web performance optimization and diagnostics. * Experience with Python 3 or higher. ## Description We have an exciting and rewarding opportunity for you to take your software engineering career to the next level., * Design, develop, and troubleshoot creative software solutions, applying innovative thinking to solve technical challenges and deliver robust systems. * Write secure, high-quality production code in React and Typescript, and conduct thorough code reviews and debugging for team contributions. * Identify and implement opportunities to automate or remediate recurring issues, enhancing the operational stability of applications and systems. * Lead technical evaluation sessions with external vendors, startups, and internal teams to assess architectural designs and technical suitability for integration with existing systems. * Champion communities of practice within Software Engineering, promoting the adoption of new and emerging technologies., J.P. Morgan's Commercial & Investment Bank is a global leader across banking, markets, securities services and payments. Corporations, governments and institutions throughout the world entrust us with their business in more than 100 countries. The Commercial & Investment Bank provides strategic advice, raises capital, manages risk and extends liquidity in markets around the world. ## Related Videos - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [React and the power of visualisation](https://www.wearedevelopers.com/videos/100-react-and-the-power-of-visualisation) - [Do TypeScript without TypeScript](https://www.wearedevelopers.com/videos/327-do-typescript-without-typescript) - [Micro Frontends with Module Federation: Why and How?](https://www.wearedevelopers.com/videos/165-micro-frontends-with-module-federation-why-and-how) - [Vuejs and TypeScript- Working Together like Peanut Butter and Jelly](https://www.wearedevelopers.com/videos/127-vuejs-and-typescript-working-together-like-peanut-butter-and-jelly) - [Native Federation: The Future of Micro Frontends and Plugin-Systems in Angular](https://www.wearedevelopers.com/videos/1018-native-federation-the-future-of-micro-frontends-and-plugin-systems-in-angular) ## Related Articles - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Frontend Developer Salary in The UK](https://www.wearedevelopers.com/magazine/233-frontend-developer-salary-in-the-uk) - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers)