Regular/Senior Embedded Software Engineer (f/m)

Join InTechHouse and work on engineering and software solutions for international customers across regulated and mission-critical industries.We are developing firmware for a battery-powered, portable ECG device with LTE, BLE and USB connectivity.What you’ll do:Integrate and stabilize firmware on an RTOS-based system,Implement BLE communication and data sync between two devices,Implement USB device communication (High-Speed, MTP) with a mobile app,Implement firmware updates over USB,Support peripherals such as LEDs and a vibration motor,Prepare the device firmware for lab testing,Depending on your experience: contribute to system architecture, cybersecurity and secure boot.Tech stack:NXP MCX N947 running Eclipse ThreadX RTOS,LTE Cat 1 bis module Telit LE310Q1, connected over USB,BLE module NORA-B266 with an AT interface over UART.What we’re looking for:4+ years of commercial experience in embedded C,Hands-on experience with an RTOS,Practical experience with BLE,Experience implementing USB device functionality,Experience with firmware update mechanismsEnglish at B2 level or higher.Nice to haveEmbedded system architecture design,Cybersecurity and secure boot implementation,Experience with NXP MCX N series and Eclipse ThreadX,Experience preparing firmware for lab tests,Working with AI coding agents (e.g., GitHub Copilot, Claude Code).What we offer:B2B contract: 80-120 PLN/h net + VAT, depending on experience,Cooperation with a stable, growing technology company listed on the stock exchange,Professional growth supported by experienced senior engineers and leads,Benefits package.We are also hiring for a second project built on Silicon Labs EFR32 (bare-metal C, I2C/SPI, Wi-Fi and Sub-GHz RF), where experience with DSP, computer vision or TensorFlow Lite is a plus.