Sol-Ark

Senior Firmware Engineer

Join Sol-Ark in Allen, Texas as a Senior Firmware Engineer focused on microcontroller firmware development. This role involves designing and debugging low-level embedded systems in C within RTOS and bare-metal environments. Enjoy competitive salary, performance bonuses, and comprehensive benefits including medical and 401(k).
Sol-Ark
Sol-Ark
Allen, Texas, United States On-site Full time UTC-05:00

Sol-Ark

Company Overview

Name

Sol-Ark

Headquarters

Allen, TX, United States

Founded

2013

Size

Approximately 180 employees and generated $65.1 million in revenue (latest available figure, pre-2023 expansion) (source: zoominfo.com).

What They Do

Sol-Ark is a privately held, veteran-owned solar and energy storage technology company that specializes in hybrid inverters and battery energy storage systems designed for solar integration. Their innovative all-in-one designs combine inverters, MPPT charge controllers, monitoring, and grid interactivity, making them suitable for grid-tied, off-grid, hybrid, and backup applications. This technology is particularly notable for its lightweight construction, being three times lighter than legacy systems, which enhances efficiency and ease of installation (source: zoominfo.com). The company has developed six generations of products, with a seventh in development, and has expanded its offerings to include electric vehicle chargers, string inverters, micro-inverters, and load management devices (source: sol-ark.com). Their target markets include residential, small commercial, and industrial segments, with clients ranging from individual homeowners to Fortune 50 companies and defense organizations.

Projects & Track Record

While specific completed projects are not detailed in available sources, Sol-Ark's systems are utilized in a variety of applications, including residential whole-home backups, commercial decarbonization sites, off-grid resorts, and critical infrastructure for defense and space agencies. Their products are deployed through partnerships with companies like Unbound Solar and NAZ Solar Electric, facilitating installations for both roof and ground mounts as well as generator-tied setups (source: sol-ark.com). The company is also engaged in ongoing expansions that include fleet-level commercial deployments and battery-only installations, which are part of their strategy to enhance resilience and optimize costs for businesses (source: sol-ark.com). Their geographic presence spans the U.S. and international markets, supported by a network of thousands of distributors and installers.

Recent Developments

In recent years, Sol-Ark has made significant strides in its product offerings and corporate achievements. Notably, on May 8, 2024, they announced the launch of the Commercial L3 Series Battery Energy Storage System aimed at business decarbonization and resilience (source: zoominfo.com). Additionally, on November 20, 2023, CEO Tom Brennan was honored with the EY Entrepreneur Of The Year 2023 National Award for his contributions to energy technology, highlighting the company's nine consecutive years of profitable growth and commitment to employee rewards (source: zoominfo.com). The company also relocated its headquarters to a new facility in Allen, Texas, which spans over 300,000 square feet, as part of its preparations for an IPO in 2024 (source: sol-ark.com).

Working There

Sol-Ark offers a variety of roles across product assembly, engineering, manufacturing, sales, and support, particularly as they expand their operations in Allen, Texas. With approximately 180 employees, the company emphasizes a culture of innovation led by veterans, focusing on the mission of protecting families through reliable energy solutions (source: sol-ark.com). The company has a strong commitment to employee performance incentives, including over $1 million awarded to employees, and is preparing for stock sharing as part of their upcoming IPO (source: zoominfo.com). Their workplace culture is characterized by a focus on resilience and reliability, with products designed to withstand harsh environments and provide dependable energy solutions.


Last updated on Feb 23, 2026 | Report an issue

Job Description

We are seeking a highly technical Senior Firmware Engineer with 10+ years of dedicated microcontroller experience. Please note: This role is strictly focused on resource-constrained microcontrollers (bare-metal and RTOS environments). Candidates whose primary background is in application-level software, embedded Linux, or microprocessor systems will not be a fit for this position.

You will join an established, highly capable team of senior firmware engineers to architect, develop, and maintain critical low-level device interactions, bridging the gap between hardware functionality and system logic.

Responsibilities

  • Architect and develop production firmware exclusively for resource-constrained microcontrollers (e.g., ESP32, TI C2000, ARM Cortex-M, or similar platforms) in bare-metal and RTOS environments.
  • Write, optimize, and maintain efficient low-level code in C.
  • Develop and configure low-level peripheral drivers and communication interfaces (UART, SPI, I2C, PWM, etc.).
  • Perform deep hardware-level debugging to resolve complex hardware/software integration issues, including tracking down stack overflows, memory leaks, and tight timing constraints using oscilloscopes and logic analyzers.
  • Collaborate directly with hardware engineers to define system interfaces and pinouts early in the design lifecycle.
  • Automate and maintain local development environments and CI/CD pipelines (utilizing tools like Jenkins, Docker and Bitbucket).

Requirements

  • Bachelor's or Master's degree in Electrical/Electronics Engineering, Computer Engineering, or Computer Science.
  • 10+ years of professional experience strictly focused on microcontroller-based firmware development, distinctly separate from high-level microprocessor or OS-based development.
  • Deep proficiency in C for embedded systems and extensive hands-on experience with Real-Time Operating Systems (e.g., FreeRTOS, ESP-IDF).
  • Proven ability to work intimately with hardware schemas, read datasheets, and write firmware that interacts directly with registers and MCU peripherals.
  • Extensive experience debugging complex embedded systems using hardware tools (JTAG, SWD, logic analyzers).
  • Familiarity with software configuration management tools, version control systems, and automated build processes.
  • Excellent communication skills with a track record of thriving in a collaborative, senior-level engineering environment.

Desired Qualifications

  • Knowledge of power electronics, power inverters, or complex control algorithms.
  • Familiarity with cellular modems, Bluetooth, Wi-Fi, and IoT protocols.
  • Familiarity with functional safety standards (ISO 26262) and safety-critical software development.
  • Familiarity with Agile or Scrum software development methodologies.

Benefits

Salary and Benefits: We offer a competitive salary and performance-based bonus program, top-tier benefits package, including medical, dental, and vision insurance, 401(k), and paid time off.

Apply now

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About the role

July 28, 2026

July 28, 2026

Full time

On-site

Company

Smart Grid

Sol-Ark

sol-ark.com

  •  Allen, Texas, United States

10+ years of experience in microcontroller-based firmware development

UTC-05:00