Embedded Firmware Engineer – Industrial Power & IoT

Delta Electronics Americas; Milwaukee (WI); On-site; USD 110,000 - 140,000; Full time

Job summary

Delta Electronics Americas seeks an experienced embedded software engineer to build and maintain the firmware stack for the Unit Controller that coordinates PCS, BMS, and HVAC. You will port and optimize code for US hardware, implement Modbus TCP/RTU, IEC 61850, CAN, and OPC UA stacks, and set up CI/CD pipelines on Azure DevOps with HIL testing and MISRA/Code quality checks.

Experience in secure boot, OTA updates, role-based access, and IEC 62443-4-1/4-2 will be advantageous in delivering

Qualifications

• BS/MS in Computer Engineering, Electrical Engineering, or Computer Science; 5+ years in embedded software for industrial / energy system.
• Expert in C/C++ on Linux and/or RTOS; strong with multithreading, real-time scheduling, IPC, and deterministic networking.
• Industrial protocol experience: Modbus TCP, IEC 61850 (MMS/GOOSE client), DNP3, OPC UA, CA.
• Modern DevOps: Git, Azure DevOps or GitHub Actions, Docker, Yocto build systems, hardware-in the-loop test rig.
• Cybersecurity fundamentals: secure boot, TLS/mTLS, signed updates, key management.

Responsibilities

• Develop firmware/middleware for the Unit Controller in C/C++ (and Rust where appropriate) on Linux / RTOS targets (Yocto, FreeRTOS, Zephyr).
• Receive and re-platform the existing Taiwan Unit Controller code base; refactor for US PCS/BESS vendors and US standards.
• Implement Modbus TCP/RTU, IEC 61850 (client), CAN, and OPC UA stacks; integrate with PCS, BMS, HVAC, and meters.
• Stand up CI/CD pipelines on Azure DevOps with self-hosted build agents, automated unit tests, static analysis (MISRA, Coverity), and HIL-in-the-loop gates.
• Implement secure boot, signed OTA updates, role-based access, audit logging — aligned to IEC 62443-4-1/-4-2 and NERC CIP where applicable.

Skills

C/C++

Rust

Linux

Multithreading

RTOS

Education

BS/MS in Computer Engineering, Electrical Engineering or Computer Science

Tools

Yocto

FreeRTOS

Zephyr

Azure DevOps

Git

Docker

Job description

Delta Electronics Americas seeks an experienced embedded software engineer to build and maintain the firmware stack for the Unit Controller that coordinates PCS, BMS, and HVAC. You will port and optimize code for US hardware, implement Modbus TCP/RTU, IEC 61850, CAN, and OPC UA stacks, and set up CI/CD pipelines on Azure DevOps with HIL testing and MISRA/Code quality checks.

Experience in secure boot, OTA updates, role-based access, and IEC 62443-4-1/4-2 will be advantageous in delivering