Senior Frontend Engineer (React)

About the role

We are seeking a Senior Frontend Engineer with deep expertise in React to join a fast‑moving squad developing a brand‑new financial application. The role is based in Luxembourg and offers the chance to shape a greenfield product from the ground up.

Key responsibilities

• Design, develop, test and deploy modern web portals, applications, components and reusable libraries.
• Build robust user interfaces using JavaScript and React (functional components, hooks, Context API).
• Collaborate with Tech Leads, Business Analysts, developers and testers to ensure clear requirements and alignment.
• Contribute to the consistency, quality and scalability of the frontend architecture.
• Deploy and monitor applications in on‑premise and cloud‑containerised environments.
• Participate in code reviews, technical discussions and continuous improvement practices.

Required profile

• Strong experience as a Frontend Engineer using React and modern JavaScript.
• Proven ability to build scalable, maintainable frontend architectures.
• Experience with shared component libraries or design systems (a plus).
• Solid understanding of unit and integration testing practices.
• Comfortable working in Agile/Squad environments.
• Experience deploying and monitoring applications in cloud or containerised setups.

Required skills

• React (functional components, hooks, Context API)
• JavaScript, HTML5, CSS3
• REST APIs, JSON
• Jest, React Testing Library
• npm, Babel, Vite
• Azure DevOps CI/CD
• Responsive design, design systems

What we offer

• Dynamic squad‑based organization.
• Greenfield project in a fast‑evolving financial environment.
• Strong collaboration between tech and business teams.
• Modern frontend stack with room for technical ownership and impact.