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Wallet icon Coin icon Rate 4 800 € - 5 800 € / month info
Timer icon Form of cooperation Full-time
Briefcase icon Sector Information Technology
Location icon Location 100% Remote

info The reward is calculated upon delivery of 20 MD per month (1MD=8h)

Project duration 6 months with the possibility of extension
Period of cooperation 15.07.2026 - 31.01.2027
Start date 15.07.2026 or by agreement
Project duration 6 months with the possibility of extension
Period of cooperation 15.07.2026 - 31.01.2027
Start date 15.07.2026 or by agreement
Technology
  • Android
  • GIT
  • Kotlin
  • WS Webservice REST
  • JSON
  • oAuth
  • Kotlin Coroutines
Languages
  • English flag English - conversational, B1
  • Slovak or Czech flag Slovak or Czech - native

Project description

  • collaboration on integration into an existing Android solution with a defined interface and prepared technical analysis
  • collaboration with an internal developer who is the author of the existing integration layer
  • the solution functions as a cloud fiscalization service communicating via REST API
  • the Android application must ensure the entire lifecycle of fiscal transactions, authentication management, response processing, and display of fiscal data on documents
  • main tasks:
    • Fiskaly API Integration
      • implementation of connection to Fiskaly SIGN DE API
      • authentication and token management
      • implementation of REST communication
      • processing JSON payloads
      • data model transformation
    • Transactional lifecycle
      • creation of fiscal transactions
      • finalization of transactions
      • processing of signatures and QR data
      • implementation of a polling mechanism for asynchronous API responses
      • processing states from "pending" to the final transaction signature
    • Android implementation
      • integration into the existing application architecture
      • design and implementation of the integration layer
      • error handling
      • retry mechanisms
      • offline scenarios
      • secure storage of login credentials
    • Quality and estimates
      • independent estimation of effort for individual features
      • technical solution design
      • communication with the internal development team
      • delivery of functional solutions within agreed deadlines
  • technologies used:
    • Must-have
      • Kotlin
      • Android SDK
      • REST API
      • JSON
      • Coroutines
      • Async programming
      • OAuth / Bearer Token Authentication
      • Token Refresh
      • Git
    • a big advantage
      • Retrofit
      • OkHttp
      • Moshi
      • Gson
      • Room
      • WorkManager
      • Hilt / Dagger
      • MVVM
      • Clean Architecture
      • Firebase
      • Crashlytics
         
  • part-time (>60%) to full-time cooperation in REMOTE mode
  • the final rate depends on the candidate's experience and the results of the selection process

Project requirements

  • min. 5 years of project experience with Android development
  • excellent knowledge of Kotlin
  • experience with:
    • REST API integrations
    • authentication and token management
    • asynchronous communication
  • ability to:
    • independently analyze a task
    • estimate implementation effort
  • results-oriented and delivering a functional solution
  • experience with production Android applications
     
  • conversational knowledge of the English language, both spoken and written
     
  • a big advantage:
    • POS systems
    • cash register solutions
    • fintech applications
    • payment systems
    • fiscalization
    • working with QR codes
    • offline-first architecture
       
  • creativity and proactive approach
  • communication
  • team player
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