Firmware Engineer

Join Reelables and help us transform how the world tracks packages! We're not just another startup, we're pioneering paper-thin smart shipping labels that use Bluetooth and 5G to track millions of packages globally.

You'll be architecting embedded systems that power real-time asset tracking across billion-dollar supply chains. From designing low-level firmware that interfaces with sensors and Bluetooth modules, to optimizing performance for edge devices, your work will directly impact how logistics teams operate globally.

Technical Expertise

• Mastery of C/C++ for embedded systems.
• Strong experience with Bluetooth LE (BT 5.x) stack integration and development.
• Ideally, experience with cellular modem firmware (LTE Cat-1, LTE-M, NB-IoT) including AT-command based interfaces and low-level API stack integration.
• Solid understanding of embedded RTOS environments (e.g., FreeRTOS).
• Experience with hardware bring-up and peripherals: GPIO, I²C, SPI, UART, ADC/DAC, etc.
• Proficiency in debugging with JTAG/SWD, logic analyzers, and oscilloscopes.
• Ability to implement extreme low-power firmware techniques: sleep states, duty cycling, and wake-on events.
• Knowledge of wireless communication protocols, stacks, primarily Bluetooth, but ideally 3GPP specifications relevant to LTE-M/NB-IoT.
• Strong skills in version control (Git) for embedded projects.
  
  

Problem-Solving & Ownership

• Ability to take ownership of end-to-end firmware development, from prototype to production.
• Comfortable in early-stage hardware/software co-design and debugging.
• Strong analytical and troubleshooting skills under time constraints.
  
  

Technical Depth

Familiarity with eSIM/eUICC and carrier certification processes (GCF, PTCRB, operator-specific).

Experience with over-the-air (OTA) firmware updates, bootloaders, and secure boot and provisioning.

Knowledge of security features: TLS, secure key storage, and related encryption techniques

Experience optimizing for ultra-low-power IoT devices (

Understanding of mass production provisioning and calibration techniques and best practices.

Python for test automation.

Domain & Industry

• Strong prior experience in IoT product development lifecycle (from dev kits, to prototypes, to shipping product).
• Familiarity with regulatory compliance (FCC, CE, ETSI, carrier lab certification).
• Nice to have low-level SDK experience with Qualcomm or other major cellular chipset vendors.