Job description
Salary: 21 000 - 35 000 PLN net + VAT (B2B) or 18 000 - 29 000 PLN gross (UoP)
Callstack was founded in 2016 by Mike Grabowski and Anna Lankauf. Our company provides top cross-platform consultancy & development in React.js and React Native. We co-create the technology and collaborate with the Meta team on shaping the technology as core contributors and innovators.
Our main goal is to drive and accelerate software development innovation. To achieve that, we follow our major rule:
We don’t follow best practices. We set them!
Callstack also organizes React Universe Conf - the only community- driven and fully dedicated to React ecosystem conference in Europe.
Join us and work with the TOP Silicon Valley and Fortune 500 companies in the USA!
As a Senior React Native Developer, you will:
Act as a technology consultant for our clients and help them build great products for multiple platforms
Drive the development process by providing expertise in cross-platform technologies and solving the most complex programming issues
Use AI-assisted development tools as a standard part of your engineering workflow to improve productivity, code quality, debugging, and technical decision-making
Collaborate with development teams, CTOs, Project Managers, and Product Owners from all around the world
Have multiple possibilities to contribute to the Open Source community by working on projects led by our CTO, React Native Core Contributors, and our Senior Developers
Be one step ahead, exploring technologies of tomorrow, and being a part of our R&D activities
Simply have fun!
Job requirements
You are the right candidate if you have:
A JavaScript expertise with extensive knowledge of modern frameworks and libraries
Experience in React.js and React Native
Strong commercial experience in mobile app development (above 3 years), experience in web development is a plus
AI-native mindset and practical familiarity with modern AI coding tools such as Codex, Claude Code, or Cursor, with the ability to use them effectively in daily software development work
Strong drive towards learning new technologies and knowledge-sharing initiatives
Ability to quickly gain new technical expertise
Fluency in English (min. B2+)
Passion about the open source mission (documented contributions to any open source project would be a huge plus)
Great communication skills and being a team player
Proactive and self-driven approach to work
What we offer:
24 paid days off & 30 days paid sick leave for B2B contractors
Fully-covered life insurance
Private healthcare for you and your family
Free access to mental health platform - Helping Hand
Multisport Card or monthly allowance for other sports activities
Individual Wellbeing & Development Budget
Monthly lunch allowance
Accounting costs refund for B2B contractors
Flexible working hours and fully remote work possibility
Cool office in Wrocław city center
Magnificent team events and activities
Company-wide workation and team building workshops
Top-notch hardware - Apple devices
JavaScript expertise, experience with React.js and React Native, 3+ years mobile app development, familiarity with AI coding tools (Codex, Claude Code, Cursor), English (B2+), open-source contributions preferred.
Key Responsibilities
- consulting clients
- driving development
- contributing open-source
Skills & Tools
React.js, React Native, Codex, Claude Code, Cursor
Job Details
- Category: Software Development
- Seniority: Mid Level
- Commitment: Full Time
- Workplace: Remote — Wrocław, Dolnośląskie, Poland
- Salary: PLN 216,000 – 420,000 / year
- Languages: English
Benefits
- Generous paid time off
About Callstack
A software consultancy specializing in cross-platform development and contributions to the React ecosystem. — Industry: Information Technology