Tietoevry - Senior React/TypeScript Developer - MERN Stack

About the Role :


We are seeking a highly experienced and technically proficient Senior React/TypeScript Developer with a strong command of the MERN Stack (MongoDB, Express.js, React, Node.js) and its modern extensions, including Next.js. You will be a key contributor, responsible for designing, developing, and maintaining high-quality, scalable, full-stack web applications. This role requires expertise in building complex, performant UIs with TypeScript and proficiency in backend services development and integration.

Key Responsibilities :

- Full-Stack Development : Design, develop, and maintain full-stack web applications using MongoDB, Express.js, React, and Node.js, with a focus on leveraging the Next.js framework for production-grade features (e.g., SSR, SSG).

- Lead the development of highly responsive, intuitive UIs using React and ensuring type safety and maintainability through extensive use of TypeScript.

- Architect and build reusable, modular React components and libraries for internal consumption, ensuring consistency and accelerated development across projects.

- Implement modern, responsive designs using utility-first CSS frameworks like Tailwind CSS and integrate/customize existing React component libraries (e.g., Material UI, Ant Design).

- Design consumption strategies and securely integrate RESTful APIs developed by the backend team, managing state effectively (e.g., Redux Toolkit, Zustand, React Query).

Quality, Performance & Collaboration :

- Code Quality & Testing : Write clean, well-tested, and optimized code. Take the lead on writing comprehensive unit and integration tests (e.g., Jest, React Testing Library).

- Identify and resolve performance bottlenecks, focusing on optimizing rendering speed, bundle size, and server response times (TTFB).

- Serve as a technical mentor and collaborate closely with UI/UX designers to ensure technical feasibility, backend developers for seamless API contracts, and DevOps teams for smooth deployment and monitoring.

- Contribute to architectural decisions, technology stack evaluations, and the definition of best practices for the entire development team.

Required Skills and Qualifications :

- Experience : 5+ years of progressive experience in front-end and full-stack development, with a focus on the React ecosystem.

- Core Stack : Expert proficiency with React.js (Hooks, Context API) and TypeScript.

- Full Stack Proficiency : Strong working knowledge of the MERN Stack (MongoDB, Express.js, React, Node.js).

- Next.js : Significant hands-on experience building production applications using the Next.js framework (including server-side rendering, routing, and API routes).

- Styling : Proficiency with modern CSS frameworks, specifically Tailwind CSS.

- APIs : Experience designing client-side data fetching strategies and consuming RESTful APIs.

- Version Control : Expert use of Git and experience with advanced branching strategies.

- Education : Bachelor's Degree in Computer Science, Engineering, or a related technical field.