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# Firmware Engineer

- **Company:** Sonicu, LLC
- **Location:** Indianapolis, IN, United States
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** Adobe Flash, Automation of Tests, Bluetooth Low Energy (Bluetooth), C++ (Programming Language), Code Review, Communications Protocols, Embedded Software, Firmware, FreeRTOS, Python (Programming Language), Near Field Communication, LoRaWaN, Toolchain, Universal Asynchronous Receiver/Transmitter, Wi-Fi Technology, Data Logging, PIC Microcontroller, Test Scripts, Wireless Devices, Git, U-Boot
- **Published:** October 9, 2026
- **Apply:** https://www.disabledperson.com/jobs/75943488-firmware-engineer

## About the Role

* 4+ years professional embedded firmware experience
 * Strong C/C++; solid Git workflow
 * Hands-on experience with: HAL/LL, toolchains, debuggers like J-Link/OpenOCD, SWD/GDB
 * Experience with at least two networking stacks/ communication protocols - from: LoRaWAN, Wi-Fi, BLE, NFC, Cellular
 * Comfort with oscilloscopes/logic analyzers, schematics, and reading datasheets
 * Clear communication, pragmatic problem-solving, and product instincts

Nice to have

 * Experience with ESP32 or STM32 microcontrollers
 * FreeRTOS (tasks/queues/timers), lwIP, mbedTLS; secure boot/flash encryption
 * LoRaWAN MAC/regions, BLE pairing/bonding, Wi-Fi provisioning/captive portal
 * Factory test automation; Python for tools/fixtures
 * Power modeling for battery-operated designs
 * UX design for e-paper/LCD displays on constrained MCUs (e.g LVGL)
 * OTA services, fleet management, and device telemetry design
 * Familiarity with quality/compliance contexts common to healthcare & life sciences (e.g., audit-friendly logging/reporting)

## Description

* Design, implement, and maintain embedded firmware for low-power wireless devices using C/C++ and FreeRTOS
 * Develop and optimize drivers and board-support code for peripherals: I²C/SPI/UART/ADC/DAC, sensors, displays, external radios (LoRa, cellular, NFC) and various forms of external memory
 * Build reliable wireless features: LoRaWAN class A/C, BLE (GATT), Wi-Fi station/AP, provisioning, roaming, and power-aware duty cycling
 * Implement secure bootloaders and OTA update flows; add logging/diagnostics and fail-safe rollback
 * Collaborate with hardware, cloud, and mobile teams to ship features end-to-end; participate in code reviews and CI
 * Support bring-up, DVT, and manufacturing test scripts; partner with our ISO 17025 lab on calibration/workflows and field reliability
 * Profile performance, battery life, and RF behavior; instrument telemetry for real-world observability