Senior Hardware / Firmware Engineer (IoT)

Location: Kraków, Poland; hybrid schedule with 2–3 days per week from the Kraków office

Company

hirify.global combines proprietary hardware, AI-powered intelligence, and healthcare-system integrations to provide real-time operational and location intelligence for hospitals.

What you will do

• Design, write, maintain, test, and review production firmware in C for Nordic Semiconductor nRF microcontrollers.
• Build BLE functionality for indoor positioning and device-to-cloud communication, including low-level drivers for sensors and peripherals.
• Develop bootloader, OTA update, power-management, watchdog, reset, and device-health functionality for reliable field operation.
• Collaborate with cloud and Location Engine teams to ensure reliable device data delivery to the platform.
• Review schematics and PCB layouts, test and validate boards in the lab, and build proof-of-concept hardware.
• Investigate production and field issues from firmware logs through component level, and create Python tools for testing, analysis, and automation.

Requirements

• 5+ years of engineering experience on commercial hardware products.
• Electrical or electronics engineering background with hands-on board design, testing, validation, bring-up, and debugging experience.
• Commercial firmware experience in C on ARM Cortex-M or similar microcontrollers, including drivers, RTOS or bare-metal development, and on-target debugging.
• Ability to independently read and review schematics and PCB layouts and explain required changes.
• Experience using oscilloscopes, logic analysers, multimeters, soldering equipment, and other lab tools for board debugging.
• Understanding of low-power design and the interaction between hardware, firmware, and battery life.
• Working knowledge of SPI, I2C, UART, ADC, and GPIO on both hardware and firmware sides.
• Solid Python skills for scripting, test automation, and tooling, plus practical day-to-day use of AI coding tools.
• Fluent spoken and written English is required; English is the daily working language, including collaboration with colleagues in the US.

Nice to have

• Nordic nRF or Zephyr RTOS experience.
• RF and wireless fundamentals, including BLE, antenna matching, and RF testing.
• PCB design experience with Altium, KiCad, or similar tools.
• Experience taking devices through production, including DFM, test fixtures, and production testing.
• Exposure to CE/FCC certification and EMC pre-compliance.
• Background in IoT, healthcare, or other regulated device environments.

Culture & Benefits

• Hybrid work with 2–3 days per week from the Kraków office.
• Meaningful equity in a rapidly scaling company with deployed products and paying customers.
• Private healthcare, benefits platform, multisport benefits, and office snacks and lunch.
• Opportunity to own work shipped in devices operating in hospitals worldwide.