Sr. Firmware Engineer – Dallas/Plano, TX – IoT & Building Automation

About the Opportunity

A leading IoT and building automation solutions provider is seeking a hands-on Sr. Firmware Engineer to own the design, development, maintenance, and testing of firmware across a portfolio of connected devices deployed at scale in commercial environments. This role collaborates closely with hardware, cloud, and QA teams to deliver performant, secure, and reliable edge devices.

Position Details

• Title: Sr. Firmware Engineer
• Location: Dallas/Plano, TX (on-site)
• Salary: Up to $180,000 DOE
• Bonus: None
• Travel: ~10% (limited)
• Work Type: Full-time

Core Tech Requirements

• Languages: C/C++ (embedded)
• Protocols/IoT: MQTT (pub/sub), Protobuf (serialization)
• RTOS: Zephyr (scheduling, drivers, configuration)
• Wireless: BLE (Bluetooth Low Energy); LoRa and mesh networking experience a plus
• BMS/Controls Context: Building automation / connected device ecosystems

Key Responsibilities

• Architect, develop, and maintain embedded firmware for production IoT products
• Lead platform and board support package development on Zephyr RTOS
• Implement secure messaging (MQTT) and efficient data models (Protocol Buffers)
• Design robust OTA update flows, including rollback and security patching
• Develop device drivers, hardware abstraction layers, and power/performance optimizations
• Own manufacturing test firmware; support build, bring-up, and failure analysis
• Establish coding standards, code review practices, and automated test strategies
• Collaborate with hardware/EE on schematics, sensor selection, and DFM/DFT considerations
• Instrument firmware for diagnostics, telemetry, and field reliability
• Author technical documentation (design specs, APIs, release notes) and mentor peers

Ideal Candidate

• Extensive embedded firmware experience with full product lifecycle ownership
• Deep RTOS background (ideally Zephyr), driver development, and low-level debugging
• Strong BLE experience; bonus for LoRa and mesh topologies
• Hands-on with secure OTA, provisioning, key/cert management, and secure boot
• Familiar with cloud-connected device patterns, telemetry, and remote diagnostics
• Comfortable working cross-functionally with hardware, QA, and cloud/software teams
• Excellent documentation, code quality, and mentoring practices

What’s Offered

• Competitive base salary up to $180,000
• Medical, Dental, Vision, Life & AD&D, and Long-Term Disability
• 401(k) with company match
• Paid vacation, holidays, and sick/personal time
• Impact at scale on real-world building automation/energy management products

If you’re a firmware leader who thrives in real-world deployments and wants to drive device performance, reliability, and security for large-scale IoT systems, this Dallas/Plano-based opportunity is for you.