Senior Full-Stack Developer (React Native & Node.js) | Short-Term B2B Freelance

STX Next is a global IT consulting company specializing in customer-focused software services, with a group of 500 professionals.

• Senior-level hands-on production experience with React Native (including the Expo framework) and modern Node.js ecosystem.
• Solid experience with Firebase services, core Node.js fundamentals, and relational databases (PostgreSQL, MySQL).
• Deep practical experience with ecosystem libraries including TanStack Query, Zustand, react-hook-form, Reanimated, Typesense, branch.io, and RevenueCat.
• Excellent English communication skills with minimum B2/C1+ level.

Nice to have:

• Practical experience with AI-powered development tools like Cursor, GitHub Copilot.
• Familiarity with monetisation libraries (RevenueCat) and advanced search (Typesense).
• Experience with Cloud and DevOps workflows such as AWS, Docker, CI/CD.

• Build, refine, and optimize mobile features using React Native (Expo) and TypeScript.
• Ensure scalable backend services within the Node.js and Firebase ecosystem.
• Implement complex mobile UI animations, in-app purchases, and third-party API integrations such as DeepL and SendGrid.
• Translate complex technical requirements into business value and collaborate directly with stakeholders.
• Ensure application performance and error tracking using tools like Sentry and PostHog.
• Establish shared standards and raise quality bar for the team.

The Controller of your personal data is STX Next spółka akcyjna with its registered office in Poznań (61-854), ul. Mostowa 38, KRS: 0000967074. Personal data will be processed for recruitment purposes. Consent withdrawal rights apply as stated in the privacy policy.