Senior Firmware Engineer

Firmware Engineer with Energy Management Systems

Mediatory Skills: (
If this skill not present in resume please don't apply
)

• EMS
  (Energy Management Systems)
• BLE Mesh
  (only Bluetooth + RF experience).
• Zephyr RTOS
  and
  CMake build systems.

Role:
Senior Firmware Engineer – Energy Management Systems

Location:
Onsite in Plano TX (Can be remote otherwise)

Employment Type:
Contract 6 Months maybe convert to long term

About the Customer

Our client is a leader in
energy management systems
, developing smart hardware and software solutions that optimize energy usage across commercial and industrial environments. Their products collect telemetry data from energy-consuming devices, transmit this data securely for analytics, and enable real-time or scheduled adjustments to improve efficiency and sustainability.

Position Overview

We are seeking an experienced
Firmware Engineer
with strong expertise in
embedded systems, microcontrollers, and Bluetooth Low Energy (BLE) mesh networking
. The ideal candidate will be proficient in
low-level C programming
,
RTOS development (Zephyr, FreeRTOS)
, and building
BLE mesh-based telemetry solutions
that interface with cloud or gateway infrastructure.

You will play a critical role in developing and maintaining the firmware that powers our client's energy monitoring and control devices. This includes implementing robust communication protocols, optimizing performance on resource-constrained hardware, and ensuring reliable data transfer to gateways and cloud endpoints.

Key Responsibilities

• Design, develop, and maintain
  firmware for microcontroller-based devices
  used in energy management systems.
• Implement and optimize
  BLE Mesh communication
  (nodes, gateways, proxies) for device-to-device and device-to-cloud communication.
• Develop
  gateway firmware
  to collect telemetry data from mesh nodes and transmit it to cloud services (e.g., AT&T or similar IoT backends).
• Work with
  low-level C code
  , peripheral drivers, and communication stacks to ensure system stability and efficiency.
• Integrate and manage
  RTOS environments
  such as
  Zephyr
  or
  FreeRTOS
  , ensuring robust multitasking and real-time performance.
• Develop and maintain
  build systems
  using
  CMake
  ,
  Make
  , and related tools.
• Collaborate closely with hardware, cloud, and analytics teams to define system requirements and optimize end-to-end performance.
• Conduct unit testing, debugging, and system validation on embedded hardware.
• Support OTA updates, power management, and fault recovery strategies.

Required Qualifications

• Bachelor's or Master's degree
  in Electrical Engineering, Computer Engineering, or related field.
• 5+ years
  of hands-on experience developing embedded firmware for microcontroller-based systems.
• Strong proficiency in
  C programming
  , particularly
  low-level, memory- and performance-constrained environments
  .
• Solid understanding of
  microcontroller architectures
  (ARM Cortex-M series preferred).
• Experience with
  Bluetooth Low Energy (BLE)
  stack and
  BLE Mesh
  implementation.
• Proficiency with
  RTOS development
  , ideally
  Zephyr
  or
  FreeRTOS
  .
• Experience working with
  build and configuration systems
  such as
  CMake
  and
  Make
  .
• Familiarity with
  gateway and proxy device design
  for IoT data collection.
• Strong debugging and hardware bring-up skills (using oscilloscopes, logic analyzers, etc.).
• Knowledge of communication protocols (UART, SPI, I2C, etc.).

Preferred Qualifications

• Experience in
  energy systems, IoT, or industrial automation
  domains.
• Exposure to
  cellular or Wi-Fi communication
  for backhaul connectivity (e.g., AT&T IoT networks).
• Knowledge of
  telemetry data formats and integration with cloud analytics platforms
  .
• Experience with
  OTA firmware update mechanisms
  .
• Familiarity with
  Python scripting
  or
  embedded Linux gateways
  .

Soft Skills

• Strong analytical and problem-solving skills.
• Ability to work cross-functionally with hardware, software, and data teams.
• Self-motivated and comfortable working in a fast-paced, innovation-driven environment.
• Excellent written and verbal communication skills.

Thanks

Siva