Kantar - Senior React.js Engineer - Javascript/TypeScript

About the Role :

We're looking for a Senior React Engineer to join our front-end team and help shape the future of our customer-facing platform.

In this role, you will :

- Lead the design, development, and optimization of complex user interfaces using React and modern front-end architecture.

- Drive UI/UX excellence by closely collaborating with designers, product managers, and backend teams.

- Own the quality of your code writing clean, maintainable, and well-tested components.

- Establish and maintain comprehensive unit, integration, and end-to-end test coverage.

- Influence and implement best practices for CI/CD, performance, and security in front-end engineering.

- Actively contribute to architectural decisions, technical roadmaps, and system design discussions.

- Mentor and support other engineers through code reviews, knowledge sharing, and hands-on collaboration.

- Thrive in a dynamic environment with autonomy and ownership over key front-end domains.

About You :

Were looking for a highly experienced engineer who brings both technical expertise and leadership maturity.

Ideal candidates will demonstrate :

- A strong foundation in computer science, software engineering, or equivalent real-world experience.

- Deep expertise in JavaScript, React, and TypeScript, with a proven track record of delivering production-grade SPAs at scale.

- Experience architecting complex front-end systems, including modular component design, state management (e.g. Redux, Zustand, or equivalent), and performance optimization.

- Solid experience with tooling and infrastructure: Webpack, Babel, npm/yarn, Git, Docker, etc.

- A strong grasp of frontend testing strategies, including Jest, React Testing Library, and Cypress (or equivalents).

- Familiarity with modern CI/CD pipelines and tools (e.g., GitHub Actions, CircleCI).

- A security-first mindset and experience mitigating common frontend vulnerabilities.

- Excellent communication and collaboration skills you're comfortable leading discussions, sharing knowledge, and driving decisions across teams.

- A growth mindset, passion for continuous improvement, and willingness to mentor others.