Time & material freelance role designing and shipping firmware for connected devices (wearables, audio, health-tech). Requires 4+ years professional firmware development, strong C/C++, hands-on ESP32 (ESP-IDF/ADF) and STM32 experience, BLE and IoT protocol knowledge, and English at B2+. Fully remote, flexible hours; potential path to permanent contract after an initial freelance period.

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.