Senior React Frontend Developer - Hybrid (London/Warsaw)

Sii Poland is seeking an experienced Frontend Developer to modernize the pricing UI for a complex notes-based application, collaborating with both frontend and backend teams in an international split between London and Warsaw.

Responsibilities include building UI components in React, integrating with the backend, and refactoring legacy components to fit a new architecture while ensuring responsive design and SOLID principles. Hybrid work is available (3 days in office).