Embedded Software Engineer - Pewaukee/Milwaukee, Wisconsin

Who We Are

Delta, founded in 1971, is a global provider of power and thermal management solutions. Its mission statement, "To provide innovative, clean and energy-efficient solutions for a better tomorrow," focuses on addressing key environmental issues such as global climate change. As an energy-saving solutions provider with core competencies in power electronics and automation, Delta's business categories include Power Electronics, Mobility, Automation, and Infrastructure.At Delta, we’re leading the energy transition with innovative solutions in solar inverters, energy storage systems, and EV charging infrastructure. Our technologies are helping utilities, businesses, and communities decarbonize and build resilient, intelligent energy ecosystems. Join us in creating a cleaner, smarter energy future.

Role Summary

Build and maintain the embedded software stack for the Delta Unit Controller, the skid-level brain that coordinates PCS, BMS, and HVAC and exposes a clean interface to the upstream RT and SCADA. You will lead the platform of the developed code base onto Delta US hardware, set up modern CI/CD on Azure DevOps, and deliver IEEE 1547-2018 / UL 1741-SB compliant firmware.

Key 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

Minimum 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

Benefit at Delta Electronics Americas

Life at Delta

EEO Statement

Delta Electronics Americas is an Equal Opportunity Employer and is committed to compliance with all applicable federal, state, and local laws. Delta Electronics America is committed to fostering a diverse, inclusive, and respectful workplace. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, age, marital status, national origin, disability, veteran status, or any other protected characteristic.Actual pay will depend on factors such as location, skills, experience, market conditions, and business needs. This role may also be eligible for incentive pay, subject to the terms of the applicable plan. Eligible employees receive company-provided benefits in accordance with plan terms and eligibility requirements. Benefits include health coverage, wellness resources, retirement savings plan, paid time off, and other company‑sponsored programs; parental leave is provided in accordance with applicable law.

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