[Hiring] Senior Android Developer KMP for Kiosk app @Ventrata

Role Description

Ventrata is looking for a Senior Android Developer to join our team and change the way tours and tickets are sold worldwide. The ideal candidate will have experience working in a startup environment and be capable of working independently as part of our remote team.

You will be joining our Terminal team, which focuses on hardware-integrated solutions that end users interact with directly — think buying from a kiosk, or validating their tickets at a turnstile. This position will push the boundaries of what's possible with Kotlin Multiplatform; your primary focus will be development of our new kiosk. This project is an important part of Ventrata and is used by end customers all around the world.

The Challenge: "Greenfield in a Box"

• This isn't a standard app-building role.
• You'll be joining our Terminal team on a fresh Kotlin Multiplatform project that's already underway — a new Kiosk app being built from the ground up.
• Once shipped, the kiosk logic can be retired from the Flutter project, streamlining both codebases.
• You'll be building the foundation for a system that isn't just used by our clients, but is designed from day one to be consumable as an SDK by third parties.

How we work:

• We hire people who think for themselves and own what they ship.
• You don't need a 5-page spec to get started.
• You ask the right questions, push back when requirements don't make sense, and own the outcome.
• You are the owner of the delivery — you can push it, tweak it, and ask questions.
• You know when to be deliberate and take safe steps, and when to take action.
• You can deliver.
• We are heavily integrating AI into our process, using tools like Claude Code for code generation.

Responsibilities and Duties

• Architect and build the new Kiosk app on Kotlin Multiplatform, contributing to shared logic for ticket booking, inventory, and platform integrations.
• Design the SDK surface that powers white-labeling, enabling our clients to customize the Kiosk experience to match their brand.
• Build the touch-optimized Kiosk UI in Jetpack Compose, with performance and reliability suitable for always-on, single-purpose devices.
• Implement smart caching and request strategies that keep the Kiosk responsive over real-world venue networks, while treating the product as online-first.
• Write and maintain unit and integration tests for the Kiosk codebase, working with QA to shape the broader automation and hardware-mocking strategy.
• Identify bottlenecks and bugs in the Kiosk runtime and drive them to resolution.
• Collaborate with the Hardware/Platform team to integrate their peripheral abstractions cleanly into the Kiosk.

Qualifications

• Deep, production-level Android and Kotlin experience — you've shipped non-trivial apps and owned them past launch.
• Strong understanding of Kotlin Multiplatform — code-sharing strategies, expect/actual, and where the boundaries between shared and platform-specific code should sit.
• Track record of designing modular, maintainable architectures (MVVM, MVI, or Clean Architecture) on greenfield or actively evolving codebases.
• Comfort with Jetpack Compose for non-trivial UIs.
• Experience with GraphQL clients in mobile contexts — bonus if it's Apollo.
• B2 English (written and spoken).
• Ability to work independently in a remote, fast-paced environment.

Nice-to-haves

• Experience designing public APIs or SDKs intended for third-party consumption.
• Familiarity with Android Kiosk Mode (Lock Task Mode) and Android Enterprise APIs.
• Exposure to apps that integrate with external peripherals (printers, scanners, payment terminals).
• Experience with always-on, single-purpose devices and the operational quirks they bring.

Benefits

• We are fairly informal about working hours.
• Unlimited paid holiday days.
• Start-up working environment.
• WFH or work remotely.
• Team buildings and company remote office.
• Two office locations: Brno and Lisbon.
• Young and passionate team - the ‘Ventrata family.”
• Hardware/remote setup package.
• Competitive salary and regular salary revaluation.
• Christmas bonuses.