Embedded Firmware Engineer — Part-Time — Automotive Tracking Devices

📍 Tel Aviv-Yafo · On-site · Part-time: 08:00–14:00 , Sun–Thu

About the Role

You will own firmware for cellular-connected automotive tracking and security devices that are already deployed in vehicles in the field.

This is a hands-on, end-to-end role: MCU firmware, modem integration, OTA, security, and chasing real bugs that customers hit in real cars.

What You'll Do

• Develop and maintain C / C++ firmware for STM32-class MCUs in cellular-connected automotive devices
• Integrate cellular modems (LTE-M / NB-IoT / GSM — e.g. Quectel, u-blox, SIMCom), GPS / GNSS, and BLE
• Implement device-to-cloud connectivity over HTTPS, raw TCP with custom binary protocols, and OTA updates
• Apply embedded security in production: secure boot, signed firmware, TLS on MCU, credential storage
• Manage power: sleep/wake states, voltage protection, battery life on a parked car
• Reproduce and fix complex field issues — bad GPS fixes, dropped LTE, OTA failures, intermittent CAN errors
• Work directly with the hardware team during bring-up and with suppliers on modem/chip issues

Must Have (Non-negotiable)

• 3–5+ years writing firmware that shipped in real products — not POCs, not lab prototypes
• Strong, daily C / C++ on bare-metal or RTOS (FreeRTOS / Zephyr / ThreadX)
• Hands-on with STM32, ESP32, or comparable MCUs — register-level, not just HAL
• Hands-on integration of at least two of: cellular modems, GPS/GNSS, BLE
• HTTPS / TLS on a constrained MCU, OTA implementation, and raw TCP sockets with a custom binary protocol
• Low-level interfaces: UART, SPI, I²C — and the ability to debug them on a scope/logic analyzer
• Power management on a battery- or vehicle-powered device
• Comfortable working part-time mornings only (08:00–14:00) on-site in Tel Aviv

Nice to Have

• Automotive / CAN BUS experience
• IoT tracking, fleet management, or asset tracking product background
• MQTT
• Embedded security: secure boot rollout, signed firmware key management, OTP/RDP on STM32