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Software Engineer III - Senior Associate proficiency in React, Typescript and JavaScript

Job in Greater London, London, Greater London, EC1A, England, UK
Listing for: JPMorgan Chase & Co.
Full Time position
Listed on 2026-01-13
Job specializations:
  • Software Development
    Web Developer, Front End Developer
Job Description & How to Apply Below
Position: Software Engineer III - Senior Associate with proficiency in React, Typescript and JavaScript.
Location: Greater London

Are you a React developer seeking an exciting opportunity to contribute to the development of JP Morgan's Salt Design system? Are you looking to be part of a collaborative team that values Open Source, leads the way in CIB UI strategy, and is actively building a design system while fostering a collaborative community around its products?

The Front-end Development team at Digital Platform has an opening for an Associate role. As a Front-end developer, you will play a crucial role in the development and delivery of the Salt Design System. We leverage the latest UI technologies to deliver the maximum value to our stakeholders.

The Salt design System is the next generation UI Toolkit for CIB (Commercial & Investment Bank). It provides a comprehensive set of core UI components that can be used by different lines of business to create reusable patterns for their business applications. These components and guidelines are designed to accelerate application design and development, while ensuring consistency and accessibility (WCAG 2.1) through stable design foundations.

Job

responsibilities
  • Develop and maintain high-quality React components for the Salt Design System.
  • Collaborate with designers to implement UI designs and ensure consistency across our digital products.
  • Work closely with product managers and other developers to understand requirements and deliver solutions that meet business needs.
  • Write clean, efficient, and maintainable code, following best practices and coding standards.
  • Conduct code reviews and provide constructive feedback to ensure code quality and adherence to standards.
  • Stay up-to-date with the latest trends and technologies in front-end development, and actively contribute to the improvement of our development processes and tools.
  • Adds to team culture of diversity, equity, inclusion, and respect
Required qualifications, capabilities, and skills
  • Existing proficiency in React, Typescript and JavaScript.
  • Solid understanding of HTML, CSS, and responsive web design.
  • Familiarity with modern front-end development tools and libraries (e.g. esbuild, rollup, vite).
  • Knowledge of version control systems (e.g., Git) and collaborative development workflows.
  • Excellent problem-solving and debugging skills.
  • Strong communication and collaboration skills, with the ability to work effectively in a team environment.
  • Emerging knowledge, opinion and of software applications and technical processes within a technical discipline (e.g., cloud, artificial intelligence, machine learning, mobile, etc.)
Preferred qualifications, capabilities, and skills
  • Preferable experience in building reusable UI components or working with design systems.
  • Familiarity with modern front-end technologies (e.g. NextJS, Remix)
  • Asynchronous operations in Java script (maybe using libraries such as Axios, RxJS)
  • Familiarity with solving UI state management
  • Already contributes to an Open Source project
  • Clean Code advocate
  • An understanding of UI accessibility concerns
  • Familiarity with one of JPM's existing design languages (UITK, MDS)
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Position Requirements
10+ Years work experience
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