Frontend Developer with React (f/m/x)

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)
  
  

Job no. 260520-2W9V1

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Benefits For You

Great Place to Work

Solid financial situation

Contracts with the biggest brands

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Profit sharing

Passion Sponsorship program

Regular integration events and trips

Comfortable and well-equipped offices

MySii app

Medical care