Senior Firmware Engineer, Research (Medtech)

Location: Hybrid, onsite in San Mateo, California, 3 days per week. Applicants must be authorized to work in the United States or eligible for a sponsorship path Cala can support.

Salary: $125,000–$175,000 per year

Company

hirify.global develops non-invasive prescription therapies and connected medical technology for chronic diseases, including neurological conditions such as hand tremor.

What you will do

• Own the development, testing, documentation, configuration, versioning, and release of firmware used in clinical studies.
• Build focused prototypes to evaluate new sensing, stimulation, and on-device algorithm concepts.
• Write firmware test procedures, create bench test setups, and perform joint hardware/firmware debugging with electrical engineering and systems teams.
• Support clinical and research staff during studies by diagnosing field issues, interpreting device logs, and converting recurring problems into design fixes.
• Document research firmware and support technical handoffs as concepts move toward commercial product development.
• Use AI-assisted development tools to accelerate firmware work while maintaining engineering quality.

Requirements

• Bachelor’s or master’s degree in computer science, computer engineering, electrical engineering, or a related field.
• 5+ years of embedded firmware development experience, including low-power and small-footprint designs.
• Strong C programming skills and proficiency in Python.
• Experience with bare-metal microcontroller firmware, preferably on ARM Cortex-M0, M3, or M4 platforms.
• Experience with BLE, sensor signal processing, data logging, or on-device algorithm implementation.
• Hands-on experience with logic analyzers, oscilloscopes, power supplies, and current measurement, plus concrete experience using AI development tools.

Nice to have

• Experience with ISO 13485 medical device quality systems or human clinical studies.
• Experience prototyping desktop or mobile applications for connected sensor data.
• RTOS experience with Zephyr, FreeRTOS, Linux, or comparable systems.
• Experience taking research prototypes through to released products.
• Experience with LTE or Wi-Fi.

Culture & Benefits

• Work on early-stage technology in a small, collaborative R&D team.
• Collaborate with engineers, clinicians, and research staff.
• Receive tools, training, and mentoring to support professional development.
• Contribute to technology intended to improve care for patients with chronic disease.