Senior Firmware Engineer

Our devices sit at the physical edge of the Kontakt.io platform — delivering real-time location intelligence for patients, staff, and assets across hospitals worldwide. The hardware we ship must be reliable, power-efficient, and maintainable at scale across thousands of deployed units in regulated healthcare environments.

We're looking for a Senior Firmware / Embedded Engineer to own the full hardware lifecycle — from schematic review and component validation to production-grade firmware running on Nordic Semiconductor microcontrollers. You'll set the quality bar for devices that clinicians and hospitals depend on every day.

What you will be working on

Hardware design & validation

Review and validate PCB schematics, component selection, and board-level design decisions before production. Catch issues early — at the schematic stage, not after boards are manufactured.

Firmware development

Build and maintain production firmware for Nordic Semiconductor (nRF) microcontrollers — including BLE and UWB radio stacks used for real-time indoor positioning in healthcare environments.

Hands-on testing & bring-up

Set up and run hardware test environments. Prototype on breadboards, solder, validate device behavior, and own bring-up from first-article boards through to production qualification.

Device reliability

Implement health monitoring mechanisms to ensure devices operate continuously in the field. Own reliability from firmware to fleet — devices must keep running without human intervention.

Day to day responsibilities

• Write and review embedded C firmware for nRF-series microcontrollers using Zephyr RTOS

• Review hardware schematics and validate PCB designs — identify and flag issues before production

• Prototype and bench-test hardware setups; solder, debug, and validate devices hands-on

• Implement and maintain watchdog, reset, and device health monitoring logic for production deployments

• Collaborate with the Location Engine team to ensure reliable, low-latency data delivery from device to cloud

• Apply AI-assisted development practices (Claude Code, or equivalent) to accelerate firmware development and code review

• Contribute to design decisions covering the full product lifecycle — requirements, component selection, enclosure validation, bring-up, and release

  The engineer we're looking for investigates problems proactively — doesn't wait to be told what's broken. Works independently across hardware and firmware layers. Thinks about correctness, reliability, and long-term maintainability — not just "does it compile."

What we are looking for

• 3+ years of embedded / firmware engineering experience on commercial hardware products

• Electronics background — able to read schematics, review PCB layouts, and validate hardware designs independently

• Hands-on hardware skills — comfortable with soldering, bring-up, and manual testing of embedded systems

• Understanding of radio / wireless fundamentals — antennas, BLE, UWB, NFC, or related protocols used in positioning systems

• Demonstrated use of AI coding tools in daily workflows (Claude, GitHub Copilot, or equivalent)

• Strong written and verbal communication in English

Nice to have

• Nordic Semiconductor (nRF series) and Zephyr RTLS experience

• Exposure to indoor positioning technologies (RTLS, IPS, UWB ranging)

• Python for scripting, tooling, or test automation

• Background in healthcare IoT or regulated device environments

We offer

• Fast-paced, dynamic startup environment with flat structure

• Competitive salary and stock option plan

• Work on cutting-edge healthcare IoT at the intersection of hardware, firmware, and real-time location intelligence

• Hybrid work model (Kraków office — 2–3 days per week onsite)

• Collaborative, self-organized engineering culture

• Private medical care and cafeteria system

Ready to build hardware that saves lives?

Apply and tell us about a hardware or firmware project you owned end-to-end — what broke, how you found it, and what you did about it.