React UI Senior Lead Engineer - Synergy EMEA

Testing Site - JPMC; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

JPMorgan Chase is seeking a Senior Lead Software Engineer to drive the development of trader-facing risk UI in a React/TypeScript stack. You will mentor teammates, guide best practices, and push for robust, secure software across multiple technologies.

You will lead design reviews and engage with external vendors to assess architectural alignment, while improving automation, delivery, and resilience across the platform.

Qualifications

• Formal training or certification in software engineering, with advanced proficiency in React.
• Strong experience with automation and continuous delivery (CI/CD).
• Comprehensive understanding of the Software Development Life Cycle.
• Advanced knowledge of agile practices, including CI/CD, resiliency, and security.
• Experience with cloud, AI/ML, or mobile technologies.
• Hands-on experience building complex web apps using React and Typescript.
• Familiarity with modern web build tools (webpack, CRA, Vite).
• Proven ability to develop secure, high-quality production TypeScript code.
• Commitment to test-driven development with Jest, Cypress, and testing-library/react.
• Experience with Python 3 or higher.

Responsibilities

• Design, develop, and troubleshoot innovative software solutions for market-facing users.
• Write secure, high-quality production code in React and TypeScript; review code and debug.
• Identify opportunities to automate recurring issues to improve stability.
• Lead technical evaluation sessions with vendors and internal teams for integration.
• Champion communities of practice and adoption of new technologies.

Skills

React

Typescript

CI/CD

Agile practices

SDLC

Code reviews

Performance testing

Python 3

Cloud / AI / ML exposure

Web performance optimization

Education

Formal training or certification in software engineering

Tools

webpack

Create React App

Vite

Jest

Cypress

@testing-library/react

Job description

We have an exciting and rewarding opportunity for you to take your software engineering career to the next level.

As a Senior Lead Software Engineer within the Equities Derivatives and Risk Technology team at JPMorgan Chase, you will play a pivotal role in an agile environment, driving the development and enhancement of market-leading technology solutions. You will be hands‑on in building a critical, trader‑facing Risk Management UI using React, while also mentoring and guiding team members in best development practices. Your expertise will directly influence business outcomes, leveraging deep technical skills and innovative problem‑solving to address complex challenges across multiple technologies and applications.

Key Responsibilities

• 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.

Required qualifications, capabilities, and skills

• 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.