Senior Mobile Developer
-, Kraków
Infogain
Project info:
We’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.
Responsibilities:
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.
Job Requirements:
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
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
Senior Mobile Developer
Senior Mobile Developer
-, Kraków
Infogain