Senior Android Developer (IoT)

TL;DR

Senior Android Developer (Kotlin/IoT): Designing and maintaining high-performance mobile applications for IoT and connected devices with an accent on Bluetooth Low Energy integration, modular architecture, and Jetpack Compose. Focus on writing reliable code covered by unit tests, participating in agile requirement discussions, and solving complex concurrency and hardware communication challenges.

Salary: 15,000–30,000 PLN net/month (B2B)

Company

A specialized software house with over 10 years of experience building products at the intersection of physical and digital worlds, including wearables and IoT solutions for global brands.

What you will do

• Design, build, and maintain high-performance and reliable Kotlin code for Android applications.
• Integrate mobile apps with peripherals using Bluetooth Low Energy (BLE).
• Perform code reviews for pull requests and provide constructive feedback.
• Cover source code with unit tests and implement TDD practices.
• Participate in requirement discussions, daily calls, and knowledge-sharing initiatives.
• Identify performance bottlenecks and resolve bugs to ensure seamless user experience.

Requirements

• 3+ years of commercial experience in Android development.
• Proven expertise in Kotlin and Jetpack Compose.
• Experience with Bluetooth Low Energy (BLE) communication.
• Proficiency in Unit Testing and TDD practices.
• Strong command of English (B2 or higher).
• Familiarity with Android libraries such as Koin and Hilt.

Nice to have

• Knowledge of architectural patterns like MVP and functional reactive programming.
• Experience with testing libraries such as JUnit, Mockito, or Robolectric.
• Background in Google Play, Android Auto, or Flutter.
• Previous experience working in Agile or Scrum environments.

Culture & Benefits

• 100% remote work policy.
• Flexible working hours with core hours between 10:00 and 18:00 CET.
• Opportunity for long-term transition to internal team with full benefits including paid holidays, sick leave, and training budget.
• Collaborative environment with regular knowledge-sharing sessions.

Hiring process

• 45-minute screening call with HR.
• Technical interview with live coding (max 90 minutes).
• Final feedback provided within a few days.