Senior Mobile Developer @ Infogain Technologies Sp. z o.o.

Mobile Development Frameworks Flutter (preferred for cross-platform) Native Development (optional but a plus) Swift / SwiftUI (iOS) Kotlin / Java (Android) Backend / API Integration RESTful APIs Security OAuth2 / OpenID Connect for authentication JWT (JSON Web Tokens) Secure data storage (Keychain, EncryptedSharedPreferences, etc.) HTTPS and certificate pinning Obfuscation & code minification GDPR and data privacy compliance Database SQLite / Room (Android) CoreData (iOS) Firebase Firestore or Realtime DB OR PostgreSQL / MongoDB (via backend) DevOps / Deployment CI/CD tools: GitHub Actions, Bitrise, Codemagic App Store / Google Play deployment Version control: Git Monitoring & Analytics Crashlytics Firebase Analytics / Mixpanel Sentry (for error tracking) Monitoring & Analytics experience in deployment of applications on iOS and Android platforms is a must  Qualifications 3+ years of professional mobile development experience. Proven track record of building apps from scratch and deploying to app stores. Experience with scalable architecture and optimizing for large user bases (~10k+ users). Solid understanding of mobile UI/UX best practices. Strong understanding of mobile app security. Must possess a legal work permit in Poland PROJECT INFOWe’re looking for a talented and motivated Mobile Developer from Kraków or nearby areas for a 3-month contract.You will be working with large company from Airline industry helping them in building mobile solution for internal usage. BENEFITS General benefits - depends on the form of employment  Attractively located office with collaboration spaces Onsite parking space for employees Referral program with financial bonus Budget for development (including language courses and others), clear career path with the possibility to gain experience in international environment Access to internal Learning Platform with multiple trainings oriented for professional growth Lifestyle benefits:  Access to MyBenefit platform (Multisport included) Team Building activities Charity initiatives Working environment promoting diversity and inclusion ,[Design, develop, test, and deploy a high-quality mobile application for both iOS and Android platforms., Build the app architecture from scratch ensuring scalability and performance., Integrate backend services via APIs and ensure real-time data handling if needed., Implement strong security measures (data encryption, secure authentication, etc.), Set up analytics, crash reporting, and performance monitoring tools., Collaborate with designers, backend developers, and stakeholders to align features with business requirements., Ensure compliance with App Store and Google Play guidelines., Optimize for performance, memory usage, and battery efficiency.] Requirements: Flutter, Swift, SwiftUI, Kotlin, Java, REST API, OAuth, JSON Web Token, HTTPS, GDPR, SQLite, ROOM, CoreData, Firebase, PostgreSQL, MongoDB, DevOps, GitHub Actions, Bitrise, Codemagic, Mixpanel, Sentry, Golang, Ionic Tools: GIT. Additionally: Private healthcare, Sport subscription, MyBenefit Platform, Team Building activities, Charity initiatives, Environment promoting diversity and inclusion, Training budget, Life Insurance, Referral program with financial bonus, Access to internal Learning Platform, Free parking.