Lead Frontend Developer

Job Purpose

Intercontinental Exchange (ICE) is seeking a Lead Developer - Front-End Web Development, responsible for building and supporting large-scale enterprise applications that integrate with back-end systems using RESTful web services and JavaScript APIs. The ideal candidate will have deep expertise in JavaScript, CSS, and HTML, along with modern frameworks and tools such as React, Redux, ExtJS, TypeScript and Node.js (npm). At Intercontinental Exchange, you will work at the forefront of global finance with state-of-the-art technology that directly influences essential markets worldwide.

Responsibilities

• Contribute to the design and development of company-wide web applications and libraries.
• Lead efforts to design, architect, and implement new software components.
• Independently manage project activities related to builds and deployments.
• Create and maintain software tests to ensure functionality and quality.
• Develop design documentation for new software and subsequent versions.
• Identify opportunities to improve and optimize applications.
• Collaborate with business analysts or product managers to understand new requirements.
• Support and mentor developers on JavaScript/web concepts.
• Adhere to team guidelines for quality and consistency.
• Follow company software development processes and standards.

Knowledge and Experience

• Bachelor’s degree in computer science; graduate degree preferred.
• 5+ years of advanced JavaScript and functional programming experience.
• 3+ years of advanced CSS experience.
• 2+ years of HTML5 techniques.
• Experience with at least one modern JavaScript framework (e.g., React, Redux, ExtJS).
• Experience building applications with TypeScript.
• Experience with iterative/test-driven development, code refactoring, and continuous integration.
• Experience with client-side testing tools (e.g., React Testing Library, Jest).
• Strong understanding of browser quirks and cross-browser optimization.
• Passion, discretion, analytical thinking, and independent judgment are key to success in this role.
• Passion for learning new technologies and adapting to fast-paced environments.

Preferred Knowledge and Experience

• Modern JavaScript language features (ES6+)
• CSS-in-JS (e.g., Emotion), Tailwind, LESS, or SASS
• RESTful design concepts and JSON-pure APIs
• Babel.js
• Git
• Electron
• Experience with AI-powered development tools including Claude Code and Cursor for accelerated code generation and refactoring
• Knowledge of RAG / MCP / LLM technologies
• Strong problem-solving abilities, with proven performance tuning, debugging, and memory profiling expertise (JavaScript and/or Java)
• Back-end experience with Java and Spring Boot; a passion for financial markets; or open-source contributions