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THE PLACE
ITRex - AI pioneers who build systems that actually work in the real world, not just in demos. We're 200+ people spread across the US and Europe, creating solutions for companies like P&G and Shutterstock. We keep it simple, build it right, and focus on what works.
THE PEOPLE
We're the kind of people who don't ignore messages in Slack, who jump in to help when you're stuck on a problem, and who offer solutions instead of blame when things go sideways. We believe in openness, accountability, and having each other's backs. No office politics, no hidden agendas - just people who care about doing good work together and supporting each other to get there.
Requirements
Your Responsibilities
Why people stay
First, the foundation:
ITRex - AI pioneers who build systems that actually work in the real world, not just in demos. We're 200+ people spread across the US and Europe, creating solutions for companies like P&G and Shutterstock. We keep it simple, build it right, and focus on what works.
THE PEOPLE
We're the kind of people who don't ignore messages in Slack, who jump in to help when you're stuck on a problem, and who offer solutions instead of blame when things go sideways. We believe in openness, accountability, and having each other's backs. No office politics, no hidden agendas - just people who care about doing good work together and supporting each other to get there.
Requirements
Your Responsibilities
- Architecting, building, and maintaining high-performance, reusable, and reliable React Native applications for both iOS and Android
- Leading a team of React Native developers, providing technical guidance, mentorship, and code reviews
- Collaborating with cross-functional teams, including product managers, designers, and backend engineers, to define, design, and ship new features
- Ensuring the best possible performance, quality, and responsiveness of the application
- Identifying and correcting bottlenecks, fixing bugs, and ensuring the application is running smoothly
- Implementing and maintaining robust unit, integration, and end-to-end tests
- Researching and implementing new technologies and best practices to improve development efficiency and application quality
- Maintaining documentation and promoting knowledge sharing within the team
- Participating in the entire application lifecycle, from conception to deployment
- 5+ years of experience in mobile development with a focus on React Native
- Proven experience in architecting, building, and maintaining high-performance, reusable, and reliable React Native applications for both iOS and Android
- Strong technical leadership experience, including providing guidance, mentorship, and conducting thorough code reviews for a team of React Native developers
- Excellent collaboration and communication skills for working effectively with cross-functional teams (Product Managers, Designers, Backend Engineers) to define, design, and implement new features
- Deep understanding of application performance optimization, quality assurance, and responsiveness best practices
- Expertise in identifying and resolving application bottlenecks, debugging, and fixing bugs to ensure smooth application operation
- Proficiency in implementing and maintaining robust testing strategies, including unit, integration, and end-to-end tests
- Demonstrated ability to research, evaluate, and implement new technologies and best practices to enhance development efficiency and application quality
- Commitment to maintaining comprehensive documentation and promoting knowledge sharing within the development team
- Experience participating in and contributing to the entire application development lifecycle, from initial conception through to deployment
- English: Upper-Intermediate or higher
- Experience in crypto & blockchain development (e.g., wallets development)
Why people stay
First, the foundation:
- Remote flexibility: Work where and how you work best - we trust you to deliver
- Fair compensation: Competitive salary + benefits that matter (medical, wellness, learning)
- Ownership opportunities: See a problem worth solving? Own it. We back smart risks over bureaucratic safety
- AI enhancement: We leverage AI to make you faster and stronger - complementing your abilities, not replacing them
- Learning investment: English classes, professional development, well-being support
- Career progression: Real paths up, not just sideways shuffling
- Responsive teammates: No ignored Slacks, no "not my problem" attitudes
- Supportive culture: When you're stuck, people help. When things break, we fix them together
- Human connections: Regular meetups, tech talks, and actual relationships beyond work
Key Skills
Ranked by relevance
react
react native
ios
ai
blockchain development
blockchain
slack
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- Posted
- Nov 06, 2025
- Type
- Full-time
- Level
- Mid-Senior
- Location
- Warsaw
- Company
- ITRex Group
Industries
IT Services
IT Consulting
Categories
Engineering
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