Our devices sit at the physical edge of the Kontakt.io platform — battery-powered BLE tags, badges and gateways that deliver real-time location intelligence for patients, staff and assets in hospitals worldwide. Thousands of them run in the field, in regulated healthcare environments, and they have to keep working without anyone touching them.

We're hiring a Senior Hardware & Firmware Engineer to join our Firmware team in Kraków. Most of your time will go into firmware — but we're specifically looking for someone with an electrical / electronics engineering background: someone who has designed and tested boards, brought them up, measured them and found out why they didn't work. You'll be the person who can look at a schematic or a misbehaving board and tell us what's really going on.

You won't be designing boards from scratch every day. You'll review and correct designs, test and validate boards in our own lab, and build proof-of-concept hardware when we need to try something quickly.

If you spent a few years as an electronics / hardware engineer and then moved closer to firmware because you wanted to own the whole device — this role was written with you in mind.

Firmware — most of your time

Design, write and maintain production firmware in C for Nordic Semiconductor (nRF) microcontrollers on our battery-powered devices

Build and extend BLE features used for indoor positioning and device-to-cloud communication

Write and debug low-level drivers for sensors and peripherals (SPI, I2C, UART, ADC)

Develop bootloader and firmware update (OTA) functionality, and keep devices updatable safely in the field

Implement power management in firmware — sleep modes, duty cycling, radio timing — to get the most out of every battery

Build watchdog, reset and device health monitoring logic so devices keep running without human intervention

Write unit and integration tests, review your teammates' code, and keep the firmware codebase maintainable

Senior Hardware / Firmware Engineer

Responsibilities

Qualification

Required

Preferred

Benefits

Company

Kontakt

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