Staff Software Engineer – Embedded C++ ​/ RTOS ​/ MCU (Real Time Feedback Control

Company Information

At HiArc, we believe clients don’t need another vendor; they need a strategic partner who gets it. One who listens harder, thinks deeper, and builds smarter—around their needs, products, and goals. HiArc engineers and manufactures complex medical technologies with one goal in mind: creating the perfect fit for our clients. No off-the-shelf thinking. No compromises. Just a tailored, high-performance solution our clients need, the way they need it.

That’s why HiArc is the most client-centered partner in the market. We fuse design, engineering, and manufacturing into a seamless, collaborative process—crafted entirely around our clients. We operate as an extension of our clients' teams, de-risking their processes and accelerating their path to market. And the result is a solution you won’t find anywhere else.

Join our team! We hire experts in hardware and software design, robotics, optics, fluidics, chemistry integration, motion and thermal control, risk management, supply chain management, performance testing, advanced manufacturing techniques, finance, human resources, sales, and marketing.

For more information, please visit HiArc.

Merrimack, NH (or Onsite/Hybrid)

Full‑Time

Medical Devices

Embedded / Firmware / Real‑Time Systems

We are seeking a Staff Software Engineer specializing in hands‑on embedded C++ development for real‑time feedback control systems running on an RTOS on an embedded microcontroller (MCU). You will build production firmware for medical instrument control platforms, contributing across requirements, development, integration, verification support, and sustaining in a regulated product development environment.

• Design, implement, and deliver reliable, high‑quality embedded software with strong emphasis on C/C++ for embedded systems.
• Develop and integrate real‑time firmware/software for medical instrument control products, including timing‑critical behaviors and deterministic execution on an RTOS.
• Drive software requirements with team members and proactively integrate with system requirements to ensure end‑to‑end system performance.
• Participate in change control activities, including investigation and resolution of software defects.
• Apply software engineering best practices (unit/integration testing, static analysis, code reviews, design reviews, and clear documentation).
• Collaborate across disciplines (software, systems, electrical, mechanical) and with non‑engineering partners to deliver programs on schedule.
• Support application/customer engineering needs as required, including troubleshooting and technical communication.

• Bachelor’s degree in Computer Engineering, Software Engineering, or related discipline (Master’s preferred).
• 14+ years of applicable, progressively complex software design/development experience.
• Strong proficiency in embedded C++ (and
  
  C), including developing production firmware on resource‑constrained systems.
• Expertise working with Real‑Time Operating Systems (RTOS) in embedded products.
• Demonstrated ability to produce robust software using disciplined engineering practices (debugging, defect resolution, and configuration/change control participation).

• Experience developing software in regulated industries, preferably medical devices.
• Familiarity with medical software lifecycle expectations such as IEC 62304 and quality systems such as ISO 13485.
• Experience with C# (e.g., tooling, test applications, or companion software).
• Familiarity with software testing and test equipment/fixtures.
• Knowledge of FPGA/VHDL (supporting broader platform development).

You’ll build mission‑critical embedded software that powers real‑time medical instrument control systems, working in a product‑focused environment where rigor, reliability, and performance matter.

#Embedded C++, #C, #Firmware, #Embedded Software, #Real‑Time Software, #RTOS, #Microcontroller, #MCU, #Real‑Time Control, #Feedback Control, #Medical Devices

• Most locations offer a 9/80 schedule, providing every other Friday off
• Competitive…