Senior React Native Developer

Stack

Responsibilities

• ▹Act as a technology consultant for 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 the engineering workflow to improve productivity, code quality, debugging and technical decision-making
• ▹Collaborate with development teams, CTOs, Project Managers and Product Owners from around the world
• ▹Contribute to the Open Source community through projects led by the CTO, React Native Core Contributors and Senior Developers
• ▹Take part in R&D activities exploring the technologies of tomorrow

Requirements

• ▹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); web development experience is a plus
• ▹AI-native mindset and practical familiarity with modern AI coding tools such as Codex, Claude Code or Cursor
• ▹Strong drive towards learning new technologies and knowledge-sharing
• ▹Ability to quickly gain new technical expertise
• ▹Fluency in English (min. B2+)
• ▹Passion for the open source mission
• ▹Great communication skills and team player attitude
• ▹Proactive and self-driven approach to work

Nice to have

• ▹Documented contributions to any open source project

Soft skills

What we offer

• ▹Salary: 21,000 - 35,000 PLN net + VAT (B2B)
• ▹24 paid days off and 30 days paid sick leave
• ▹Fully covered life insurance
• ▹Private healthcare for you and your family
• ▹Free access to the Helping Hand mental health platform
• ▹Multisport card or monthly allowance for other sports activities
• ▹Individual wellbeing and development budget
• ▹Monthly lunch allowance
• ▹Accounting costs refund
• ▹Flexible working hours and fully remote work possibility
• ▹Office in Wrocław city center
• ▹Team events and activities
• ▹Company-wide workation and team building workshops
• ▹Top-notch hardware (Apple devices)

About the company

Callstack was founded in 2016 and provides cross-platform consultancy and development. It collaborates with the Meta team as a core contributor to React Native, organizes the React Universe Conf, and works with Silicon Valley and Fortune 500 companies.