Senior React Native Developer
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 platformsDrive the development process by providing expertise in cross-platform technologies and solving the most complex programming issuesUse AI-assisted development tools as a standard part of your engineering workflow to improve productivity, code quality, debugging, and technical decision-makingCollaborate with development teams, CTOs, Project Managers, and Product Owners from all around the worldHave multiple possibilities to contribute to the Open Source community by working on projects led by our CTO, React Native Core Contributors, and our Senior DevelopersBe one step ahead, exploring technologies of tomorrow, and being a part of our R&D activitiesSimply have fun!You are the right candidate if you have:A JavaScript expertise with extensive knowledge of modern frameworks and librariesExperience in React.js and React NativeStrong commercial experience in mobile app development (above 3 years), experience in web development is a plusAI-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 workStrong drive towards learning new technologies and knowledge-sharing initiativesAbility to quickly gain new technical expertiseFluency 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 playerProactive and self-driven approach to workWhat we offer:24 paid days off & 30 days paid sick leave for B2B contractorsFully-covered life insurancePrivate healthcare for you and your familyFree access to mental health platform - Helping HandMultisport Card or monthly allowance for other sports activitiesIndividual Wellbeing & Development BudgetMonthly lunch allowanceAccounting costs refund for B2B contractorsFlexible working hours and fully remote work possibilityCool office in Wrocław city centerMagnificent team events and activitiesCompany-wide workation and team building workshopsTop-notch hardware - Apple devices