Senior/ Principal Frontend Developer (React)
Xebia PolandPoland
Posted April 12, 2025
Full Time
About the Company
Xebia is a company that stands for innovation, talented team members, and technological excellence.
Job Description
We are Xebia - a place where experts grow. We're passionate about Cloud-based solutions and are looking for a Senior/ Principal Frontend Developer to contribute to the development of core browser features used by millions of users worldwide.
Requirements
- Excellent knowledge of JavaScript (ES6+)
- Strong understanding of different data structures and when to use them
- Practical and conscious use of TypeScript
- Hands-on experience with React 18/19
- Solid knowledge of Web API ecosystem
- Very good understanding of REST architecture and client–server communication
- Awareness of differences between REST, GraphQL, and other API architectures
- Understanding of caching layers, strategies, and their impact on performance
- Strong debugging and analytical skills
- Good grasp of general programming principles
- Strong understanding of code design principles, quality standards, and ways to evaluate code health
- Knowledge of algorithmic fundamentals and ability to reason about complexity in practice
- Excellent understanding of the frontend ecosystem — networking, browser mechanics, performance, and security
