Frontend Developer with React (f/m/x)

Senior • Hybrid

Warsaw, Poland

Join the dynamic international team of professionals split between London and Warsaw. We are looking for an experienced Frontend Developer to help modernize the user interface of a complex pricing application used for structured notes. The role involves working closely with both frontend and backend developers as we uplift the existing UI while maintaining compatibility with the legacy application.

Your tasks

Develop and maintain user interface components using ReactJS and JavaScript
Collaborate with backend developers and strategists to implement features
Refactor legacy UI components to align with the new architecture
Utilize CSS-in-JS or SCSS for styling and implement responsive designs
Participate in code reviews and apply solid design patterns
Contribute to improving CI/CD workflows and frontend build processes

Requirements

Minimum of 5 years of commercial frontend development experience
Strong knowledge of ReactJS (including Hooks and Context API) and JavaScript
Practical experience with TypeScript, with proficiency in modern CSS techniques and tools
Familiarity with modern frontend tooling: webpack, npm, GitLab/Jenkins
Understanding of testing methodologies and software design principles
Fluency in English (spoken and written)
Open to hybrid work (3 days per week in the office)

Sii

Sii is a company recognized as a "Great Place to Work" since 2015, thanks to employee feedback and the implementation of new ideas. Established in 2006, Sii has demonstrated financial stability with a revenue of 2.1 billion PLN and no debts. The company shares its profits with employees, having allocated over 76 million PLN for this purpose since 2022. Sii offers a rich benefits package, including private healthcare, a cafeteria platform, and discounts on cars. Employees can work in comfortable A-class offices or remotely. Sii is involved in numerous fascinating projects for prestigious global brands and invests 1 million PLN annually to support employee passions and volunteer actions. The company emphasizes personal development through meetups, webinars, a training platform, and a technology blog. Sii is characterized by a fantastic atmosphere created by its "Sii Power People."

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