Job Description

Embedded Software Engineer | Connected HVAC Products

Location: Indianapolis, IN | Schedule: Mon-Fri, 9:00 AM - 5:00 PM | Pay Rate: $76/hr

Build the Future of Connected HVAC Technology

PDS Tech Commercial is seeking an Embedded Software Engineer to help develop next-generation smart HVAC products that are more connected, secure, and energy efficient.

In this role, you'll design and develop embedded firmware for advanced HVAC systems, working closely with hardware and cross-functional engineering teams to bring innovative products from concept through production.

What You'll Do

• Develop embedded software using Embedded C for ARM Cortex-M platforms
• Design and maintain bare-metal and RTOS-based firmware
• Develop and optimize drivers for UART, SPI, I2C, GPIO, DMA, timers, and watchdogs
• Create bootloaders, firmware update mechanisms, and low-power applications
• Support wireless technologies including Z-Wave, mesh networking, and proprietary sub-GHz protocols
• Collaborate with hardware engineers on system integration and product development
• Debug and troubleshoot embedded systems using tools such as J-Link, SWD, and GDB
• Support secure firmware development, OTA updates, and product reliability initiatives
• Participate in code reviews, testing, documentation, and continuous improvement efforts

Required Qualifications

• Bachelor's degree in Computer Engineering, Electrical Engineering, Computer Science, or related field (or equivalent experience)
• Strong experience developing firmware in Embedded C
• Experience with ARM Cortex-M microcontrollers
• Expertise with bare-metal and/or RTOS-based development
• Experience with Z-Wave, mesh networking, sub-GHz wireless protocols, or low-power wireless sensor networks
• Experience with interrupt-driven architectures and embedded peripherals
• Experience developing bootloaders, firmware update systems, and low-power embedded applications
• Hands-on debugging experience using J-Link, SWD, GDB, or similar tools
• Strong communication and collaboration skills

Preferred Qualifications

• Experience with Silicon Labs EFR32, Gecko SDK, Simplicity Studio, or Silicon Labs wireless stacks
• Knowledge of secure boot, firmware signing, secure pairing, and encrypted OTA updates
• Experience with modular firmware design, state machines, Git, CI/CD, and automated testing
• Familiarity with RF concepts, EMC/EMI troubleshooting, and wireless certifications
• Experience supporting smart home, HVAC, industrial, or connected IoT products

You should be proficient in:

• ARM Cortex-M microcontrollers
• Bare-metal
• Bootloaders and firmware update systems
• Embedded C
• Experience with Silicon Labs
• Mesh networking
• OTA firmware updates
• Proprietary sub-GHz protocols
• RTOS-based firmware
• Wireless Protocol Expertise
• Z-Wave
• Automated testing

Machines & technologies you'll use:

• Z-wave