Senior Software Engineer (React/Js)

Role: Senior Software Engineer
Position Type: Full-Time Contract (40hrs/week)
Contract Duration: 1/12/26 – 1/11/27
Work Schedule: 8 hours/day (Mon-Fri)
Work Hours: US Time
Location: 100% Remote (Candidates can work from anywhere in Mexico)

The Frontend Infrastructure team, part of the User Experience Foundations (UXF) group, is an eight-person engineering team supported by an engineering manager and product manager. The team builds and maintains the frameworks, tools, and systems that make it faster and easier for client's engineers and designers to create high-quality, performant user experiences across the site.

About The Role

The contractor will support the Frontend Infrastructure team to enhance client's frontend development ecosystem. This work will focus on improving frameworks, build systems, and tooling that empower engineers and designers to create performant, reliable, and accessible user experiences.

Key Responsibilities:

• Designing, implementing, and improving core frontend infrastructure, including client's server-side rendered React stack and modern JavaScript build pipelines (e.g., Vite).
• Developing and maintaining internal tools, automation, and shared libraries that improve engineering efficiency, code quality, and developer experience.
• Participating in architecture discussions, code reviews, and design planning to ensure technical consistency and scalability across the frontend ecosystem.
• Contributing to documentation and internal communications that support adoption, onboarding, and maintenance of shared frontend tools and systems.
• Supporting initiatives that make client's developer experience more inclusive and accessible for a global engineering community.

Technical Environment:
The contractor's work will primarily use TypeScript/JavaScript and PHP, with emphasis on modern build tooling, frontend performance optimization, and cloud-based infrastructure.

Requirements

Must-Haves

• Strong proficiency in JavaScript and TypeScript, with experience building and maintaining modern frontend systems.
• Solid understanding of frontend architecture, build systems, and performance optimization for large-scale web applications.
• Demonstrated experience improving developer tooling, CI/CD pipelines, or frontend infrastructure systems.

Nice-to-Haves

• Familiarity with PHP and server-side rendered React applications.
• Experience with modern bundlers and build tools (e.g., Vite, Webpack, Rollup).
• Understanding of cloud environments and observability tools.
• Background working with design systems, shared component libraries, or developer experience platforms.
• Strong communication and collaboration skills, with a focus on inclusive and cross-functional teamwork.