Firmware/Embedded Software Engineer

Project J Ltd; Los Angeles (CA); On-site; USD 90,000 - 120,000; Full time

Job summary

Project J Ltd is looking for a Firmware/Embedded Software Engineer in Los Angeles to design and develop software for innovative battery electric locomotives. You'll work with various teams on embedded systems and HMI interfaces, ensuring rigorous safety standards.

The ideal candidate has strong C/C++ and Python skills, Linux experience, and a passion for sustainable transportation, contributing to significant advancements in the rail industry.

Qualifications

• 3+ years of embedded software/firmware development experience.
• Hands-on experience with communication protocols: CAN Bus, Ethernet, I2C, SPI.
• Experience designing industrial HMI interfaces.

Responsibilities

• Write and test embedded software and firmware for locomotive system controls.
• Design and implement industrial HMI interfaces.
• Configure and maintain Linux systems, including BASH scripting.

Skills

C

C++

Python

Linux system administration

CAN Bus

Ethernet

I2C

SPI

Tools

MATLAB/Simulink

STM32 microcontroller

Job description

Who We Are:

At Voltify, we are building the next generation of rail - battery locomotives that fast charge autonomously and dynamically through a dedicated self-sustained microgrid network.

We are bringing back the power to the industry and eliminating the dependency on fossil fuels.

Lowering the rail industry’s main expense - energy - by more than 20%.

This is over $3B yearly just in North America.

We are already working with some of the largest global rail companies with over $50M in contingent orders.

We have raised over $30M from top tier funds and strategics and rapidly growing.

Our founding team has a proven track record in building billion$ public companies in renewable energy and infrastructure.

About The Role:

We’re looking for a Firmware/Embedded Software Engineer to write and test software for our battery electric locomotive control systems. You’ll work on everything from low‑level embedded firmware to industrial HMI interfaces, collaborating closely with electrical and mechanical teams to bring our locomotive to life. We want a driven, fast‑paced self‑learner who can move between embedded C/C++ development, Linux system configuration, and high‑level HMI design while maintaining rigorous safety standards. We offer a competitive salary, comprehensive benefits, and the opportunity to build the software backbone of the future of rail technology.

What You’ll Do:

• Write and test embedded software and firmware for locomotive system controls (C/C++, Python)
• Design and implement industrial HMI interfaces using HTML or GUI programming frameworks
• Configure and maintain Linux systems, including BASH scripting and network configuration
• Implement robust communication stacks for Ethernet, CAN Bus, I2C, and SPI protocols
• Develop control algorithms for high‑voltage systems including BMS and power routing
• Create and maintain software architecture documentation and technical specifications
• Implement simple signal filtering and data processing algorithms
• Develop network APIs and integrate with SCADA systems and MQTT protocols
• Design software for safety‑critical systems with proper validation and verification
• Collaborate with electrical engineers on embedded controller integration
• Support system testing and validation in lab and field environments

What We’re Looking For:

• 3+ years of embedded software/firmware development experience (automotive, marine, industrial, or rail preferred)
• Strong proficiency in C, C++, and Python
• Experience with Linux system administration, configuration, and shell scripting
• Hands‑on experience with communication protocols: CAN Bus, Ethernet, I2C, SPI
• Knowledge of high‑voltage system control (BMS, power routing, contactor control)
• Experience designing industrial HMI interfaces (web‑based or native GUI)
• Understanding of software architecture and documentation practices
• Familiarity with safety‑critical software development principles
• Nice to have: STM32 microcontroller experience
• Nice to have: MATLAB/Simulink experience for model‑based design
• Nice to have: Experience with SCADA systems, MQTT, or industrial IoT protocols
• Ability to thrive in fast‑paced, high‑pressure startup environments
• Proactive problem‑solver who takes ownership from concept to deployment
• Passion for clean energy and sustainable transportation
• Bonus: Experience with battery management systems or electric vehicle controls
• Bonus 2: Loves trains