# React Native Engineer at ITRex Group

> Open job at ITRex Group. Workplace: Remote (Poland).

Source: Poland Dev Jobs, https://poland-devjobs.com/jobs/itrex-group-react-native-engineer-l4hj1gh
Posted 26 October 2026. Last checked on the employer's career site: 10 November 2026.

## Facts

- Company: [ITRex Group](https://poland-devjobs.com/companies/itrex-group)
- Location: Remote (Poland)
- Workplace: Remote (Poland)
- Employment type: Full-time
- Polish: Not required
- English: Business level
- Skills: Android, React Native, TypeScript, iOS
- Not mentioned in the job post: salary, visa sponsorship, relocation, where you can apply from

## Job description

#### 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.

We are looking for Senior React Native Engineer to join our team!

**Your Responsibilities**

- Architect, build, and maintain high-performance, scalable React Native applications for iOS and Android.
- Collaborate with Product, Design, and Backend teams to define requirements and deliver new features.
- Communicate and collaborate with external partners, including banks, SDK vendors, and 3rd-party providers, to support integrations, resolve issues, and ensure technical alignment.
- Integrate and maintain third-party SDKs, native modules, and Web3/crypto libraries.
- Implement Web3 functionality, including wallet features, signing, and smart contract interactions.
- Ensure secure handling of sensitive data (private keys, seed phrases) and enforce mobile security best practices.
- Ensure top-level application performance, responsiveness, and overall app quality.
- Identify and resolve performance bottlenecks, defects, and reliability issues.
- Implement and maintain comprehensive test coverage (unit, integration, E2E).
- Work with CI/CD pipelines to support automated build, testing, and deployment processes.
- Research, evaluate, and introduce new technologies and best practices to improve product quality and development efficiency.
- Participate in the full application development lifecycle, from initial concept to production deployment.

**Requirements**

**Our Expectations**

**React Native & Mobile Development**

- 5+ years of experience in mobile development with a focus on React Native.
- Deep understanding of React Native architecture, preferably also exposure to Fabric and TurboModules.
- Proven ability to architect, build and maintain high-performance, scalable mobile applications.
- Expertise in application performance optimization, debugging, and profiling.
- Strong knowledge of TypeScript and experience enforcing strict typing practices.
- Experience publishing and maintaining apps in App Store and Google Play.

**Processes**

- Expertise in identifying, analyzing, and resolving application bottlenecks and performance issues.
- Experience building and maintaining robust testing strategies (unit, integration, E2E).
- Ability to research, evaluate, and introduce new technologies and best practices.
- Strong understanding of mobile security principles, secure data storage, and anti-fraud mechanisms.
- Experience operating in fast-paced environments and making informed decisions under uncertainty.
- English: Upper-Intermediate or higher.

**Nice to have:**

**Blockchain & Web3**

- Hands-on experience in crypto & blockchain development (crypto wallets, signing, transactions).
- Strong understanding of Web3 technologies: WalletConnect, EVM networks, RPC, smart contract interaction.
- Experience with secure key storage, seed phrase handling, encryption, private key management, and cryptography best practices.
- Experience integrating complex SDKs/APIs, bridging native iOS/Android SDKs, and working with Web3/crypto libraries.
- Understanding of ERC standards and token metadata structures

**Benefits**

**What We Offer**

**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)

Then, the growth:

- 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

Finally, the people:

- 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

## How to apply

Apply on the job page, https://poland-devjobs.com/jobs/itrex-group-react-native-engineer-l4hj1gh: its Apply button opens the employer's own application page.