Fullstack Developer with React

Sii Poland; Toruń; On-site; PLN 120,000 - 180,000; Full time

Job summary

A leading technology firm in Toruń, Poland is seeking a Fullstack Developer with at least 5 years of experience. You will design modern UIs using React and TypeScript, work on backend integration, and co-create APIs. Ideal candidates are motivated self-starters with a strong understanding of UX/UI principles. The job offers various benefits, including a solid financial situation and opportunities for professional growth.

Benefits

Great Place to Work

Solid financial situation

Profit sharing

Medical care

Qualifications

• At least 5 years of experience as a Frontend Developer.
• Very good knowledge of React and TypeScript.
• Good knowledge of Python or Golang.

Responsibilities

• Design and develop modern user interfaces using React and TypeScript.
• Co-create APIs and design workflows for engineering teams.
• Work on frontend architecture and performance optimization.

Skills

React

TypeScript

Python

Golang

UX/UI principles

RESTful APIs

Self-motivation

Job description

Overview

Join Sii as a Fullstack Developer and participate in the development of an engineering portal - a key web platform supporting the daily work of all technical teams in a large US-based technology organization. The portal we support integrates with Kubernetes-based infrastructure and Continuous Deployment (CI/CD) systems, enabling tools for transparency, automation and operational efficiency. The project is implemented in partnership with an engineering team that provides cutting-edge solutions in the areas of cloud storage, file synchronization and team collaboration. The platform is used by millions of users around the world, and the development of internal tools has a direct impact on the quality and reliability of the entire technology ecosystem.

Responsibilities

• Design and development of modern user interfaces using React and TypeScript
• Backend integration - co-creating APIs and designing intuitive workflows for engineering teams
• Working with frontend architecture, state management, performance optimization, component development, UI scalability
• Proactive approach to UX/UI - simplifying complex technical processes

Requirements

• At least 5 years of experience as a Frontend Developer
• Very good knowledge of React and TypeScript
• Good knowledge of Python or Golang
• Experience working with component architecture and application state management
• Willingness to learn and work with backend systems
• Understanding of UX/UI principles and attention to usability of interfaces
• Ability to design and integrate RESTful APIs
• Self-motivation and initiative
• Residence in Poland required and fluency in the Polish language

Job details

Job no. 250924-34DOY

Benefits

• 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