Freelance Senior Android Developer role working remotely (Warsaw-based office optional). Responsibilities include designing, building and maintaining Android apps that communicate with hardware over BLE, writing Kotlin, using Jetpack Compose, applying unit testing/TDD, reviewing code, and using AI tools in the workflow. Initial freelance/time & material engagement (paid by hours); potential path to permanent contract and benefits after ~3 months. English (B2+) required.

Freelance Senior Flutter Developer to deliver cross-platform Flutter apps that interact with firmware and physical devices via BLE (experience with flutter_blue_plus preferred). Fully remote (Warsaw office & Gdansk cowork optional), paid on B2B hourly basis (90–180 PLN/h). Path to permanent contract possible after initial 3 months. Role requires commercial Flutter and Dart experience, platform debugging (iOS/Android), and strong problem-solving and collaboration skills.

Freelance Senior iOS Developer role (fully remote, Warsaw office available). Paid hourly B2B (90–180 PLN/h). Responsibilities: build and maintain iOS apps communicating with BLE hardware, write unit tests (XCTest/Quick/Nimble) with a TDD mindset, maintain CI/CD (GitHub Actions/Bitrise/Travis), review PRs, and collaborate with firmware, design, QA, and PMs. Path to permanent contract possible after initial 3 months.

Join as a freelance Mobile Developer owning the mobile side of connected-product projects (wearables, sensors, health-tech). Design and implement robust BLE communication flows, debug device interactions, and work alongside firmware, backend, design, QA and PMs. Role is fully remote (optional Warsaw/Gdansk offices), paid 90–180 PLN/h B2B, with a path to a permanent contract after a successful initial 3-month period. Recruitment and day-to-day work in English (B2+).