Callstack

We founded Callstack in 2016, shortly after React Native’s release. We build and scale cross-platform applications for web, mobile, desktop, and TV, including iOS, Android, tvOS, and Vision Pro. Our services include Consulting, Product Development, Enterprise Solutions, and AI Engineering.

We primarily use React and React Native, applying a single programming model for development across platforms.

We are core contributors to the React Native framework and maintain major open-source libraries. We have made over 250 commits to React Native, and our libraries have 20 million downloads on npm and 10,000 stars on GitHub.

We also co-organize community events like React Universe Conf, React Conf, and the React Universe On Air podcast. We partner with engineering organizations to solve complex cross-platform challenges using our React Native Enterprise Framework.

Our core values guide how we operate.

We aim to lead the market by delivering strong performance and value. We set ambitious goals and take ownership to achieve them.

We encourage personal growth through professional development, seeking feedback, and prioritizing well-being.

We build positive relationships through respect, active listening, and empathy.

Innovation is key: we actively seek and experiment with new ideas, sharing what we learn to shape our future success.

Callstack is a remote-first company with 201-500 employees across more than 10 countries. While remote work is the default, some roles may require hybrid or in-office presence at its Wrocław, Poland headquarters.

The culture values ownership, community, and technical excellence. It is an open source-focused environment, with many employees as core contributors to React Native.

The team includes an Executive Team and Core Contributors who are Software Engineers and Developers. The environment supports collaboration and expert problem-solving.

We provide a remote-first work environment with flexible hours.

• 24 paid days off annually
• Up to 30 days of paid sick leave
• Fully covered life insurance and co-financed private healthcare plans for employees and their families (or an equivalent for those outside Poland)
• A sports allowance (e.g., Multisport card or local equivalent)
• Free access to the Helping Hand platform for mental health support
• A Wellbeing & Development Budget for personal and professional growth
• Company-wide workations and team events
• Milestone Five Anniversary Program
• Accounting cost refunds for B2B contractors
• Participation in React Universe Conf
• Monthly lunch allowance
• Apple hardware