Firmware Engineer

LER TechForce, LLC.; Indianapolis (IN); Sur place; USD 90 000 - 130 000; Plein temps

Résumé du poste

LER TechForce, LLC. is seeking an experienced embedded firmware engineer to design, develop, and maintain low-power wireless device firmware. You will implement drivers, connectivity stacks, and OTA update workflows, collaborating with hardware, cloud, and mobile teams to ship features from concept to deployment.

The role requires strong C/C++ skills, FreeRTOS experience, and hands-on debugging with J-Link/OpenOCD, plus familiarity with LoRaWAN, Wi‑Fi, BLE, NFC, and power optimization.

Qualifications

• At least 4 years of professional embedded firmware development experience.
• Strong programming skills in C and C++.
• Experience working with Git-based development workflows.
• Hands-on experience with embedded toolchains, HAL/LL libraries, SWD/GDB, and debugging tools such as J-Link or OpenOCD.
• Experience with at least two of LoRaWAN, Wi-Fi, Bluetooth Low Energy, NFC.
• Ability to use oscilloscopes and logic analyzers.
• Ability to read schematics and component datasheets.
• Clear communication, practical problem-solving skills, and strong product instincts.
• Experience with ESP32 or STM32 microcontrollers.
• Knowledge of FreeRTOS tasks, queues, and timers.
• Experience with lwIP, mbedTLS, secure boot, or flash encryption.
• Familiarity with LoRaWAN regions and MAC behavior, BLE pairing and bonding, or Wi-Fi captive-portal provisioning.
• Experience developing factory-test automation or Python-based tools and fixtures.
• Experience modeling and optimizing power consumption for battery-operated products.
• Familiarity with e-paper or LCD user interfaces on resource-constrained microcontrollers, including LVGL.
• Experience with OTA services, device telemetry, or fleet-management platforms.
• Familiarity with quality and compliance environments in healthcare or life sciences, including audit-friendly logging and reporting.

Responsabilités

• Design, develop, and maintain embedded firmware for low-power wireless devices using C/C++ and FreeRTOS.
• Develop and optimize device drivers and board-support code for I²C, SPI, UART, ADC, DAC, sensors, displays, external memory, and wireless radios.
• Build reliable connectivity features using LoRaWAN, BLE, Wi‑Fi, cellular, and NFC.
• Develop Wi‑Fi provisioning, roaming, station and access-point functionality, and power-aware duty cycling.
• Implement secure bootloaders and over-the-air update workflows with diagnostics, logging, and fail-safe rollback.
• Collaborate with hardware, cloud, and mobile teams to deliver features from concept through deployment.
• Participate in code reviews and continuous-integration activities.
• Support board bring-up, design verification testing, manufacturing test scripts, calibration workflows, and field reliability.
• Profile battery life, performance, and RF behavior while developing telemetry for real-world product observability.

Connaissances

C and C++

Git workflows

Embedded debugging tools

Oscilloscopes & logic analyzers

Schematic reading

Communication protocols

Outils

FreeRTOS

J-Link

OpenOCD

lwIP

mbedTLS

ESP32

STM32

Description du poste

• Design, develop, and maintain embedded firmware for low-power wireless devices using C/C++ and FreeRTOS
• Develop and optimize device drivers and board-support code for I²C, SPI, UART, ADC, DAC, sensors, displays, external memory, and wireless radios
• Build reliable connectivity features using LoRaWAN, BLE, Wi-Fi, cellular, and NFC
• Develop Wi-Fi provisioning, roaming, station and access-point functionality, and power-aware duty cycling
• Implement secure bootloaders and over-the-air update workflows with diagnostics, logging, and fail-safe rollback
• Collaborate with hardware, cloud, and mobile teams to deliver features from concept through deployment
• Participate in code reviews and continuous-integration activities
• Support board bring-up, design verification testing, manufacturing test scripts, calibration workflows, and field reliability
• Profile battery life, performance, and RF behavior while developing telemetry for real-world product observability

What You Will Need to Be Successful

Essential Qualifications

• At least 4 years of professional embedded firmware development experience


• Strong programming skills in C and C++


• Experience working with Git-based development workflows


• Hands-on experience with embedded toolchains, HAL/LL libraries, SWD/GDB, and debugging tools such as J-Link or OpenOCD


• Experience with at least two of the following communication technologies:


• LoRaWAN


• Wi-Fi


• Bluetooth Low Energy


• NFC


• Ability to use oscilloscopes and logic analyzers


• Ability to read schematics and component datasheets


• Clear communication, practical problem-solving skills, and strong product instincts

Preferred Qualifications

• Experience with ESP32 or STM32 microcontrollers


• Knowledge of FreeRTOS tasks, queues, and timers


• Experience with lwIP, mbedTLS, secure boot, or flash encryption


• Familiarity with LoRaWAN regions and MAC behavior, BLE pairing and bonding, or Wi-Fi captive-portal provisioning


• Experience developing factory-test automation or Python-based tools and fixtures


• Experience modeling and optimizing power consumption for battery-operated products


• Familiarity with e-paper or LCD user interfaces on resource-constrained microcontrollers, including LVGL


• Experience with OTA services, device telemetry, or fleet-management platforms


• Familiarity with quality and compliance environments in healthcare or life sciences, including audit-friendly logging and reporting