Senior Front-End Developer (JavaScript/TypeScript/React)

We are seeking a Senior Front-End Developer to architect, build, and evolve user-facing features for a modern point-of-sale experience deployed across client retail environments. In this role, you will drive technical initiatives, mentor peers, and partner with cross-functional stakeholders to deliver robust UI components and high-quality releases at scale. Responsibilities Architect, build, and maintain scalable frontend components and shared libraries using React, JavaScript, and TypeScript Drive the delivery of complex user-facing features from technical design through release, aligned with product strategy and team priorities Define testing strategies and implement comprehensive unit, integration, and regression tests using React Testing Library to ensure long-term reliability Lead the adoption and extension of Material UI to establish consistent, accessible, and reusable UI patterns across the application Partner closely with backend engineers to design API contracts, integrate services, and optimize end-to-end flows Lead code reviews, define engineering standards, and champion best practices to raise the overall quality bar across the team Own the stability of a high-availability, store-ready application by proactively identifying and resolving defects, performance bottlenecks, and technical debt Mentor mid-level engineers and contribute to the technical growth of the team Requirements 3+ years of hands-on experience with JavaScript, React, and TypeScript, including delivery of production-grade applications Proven experience with Anthropic Claude Code or similar AI-assisted development tools, with the ability to integrate them effectively into daily workflows Strong architectural thinking and the ability to make sound technical decisions in ambiguous environments Demonstrated cross-functional leadership, working effectively with backend, product, and design partners Strong ownership mindset with a track record of driving initiatives end-to-end and adapting to shifting priorities Excellent communication skills, including the ability to influence technical direction and explain complex concepts clearly Excellent written and verbal communication skills in English (B2+ level) Nice to have Practical experience with Java Working knowledge of Spring Boot Experience with New Relic for monitoring and performance analysis