Senior Embedded & Firmware Software Engineer (C++ / Multi-MCU)

Job Description

Azena Medical is the leader in the design and manufacture of laser systems for oral-healthcare. From chair-side dental lasers that redefine soft-tissue precision to portable PBM systems trusted by elite athletes, our products blend photonics innovation with rock-solid embedded engineering. Join us at our Walnut Creek R&D headquarters and build the next generation of medical-grade laser platforms.

What you’ll do

• Create firmware and low-level software for new and existing diode-laser product lines built around NXP, Espressif and other ARM-class MCUs.

• Rapidly assimilate, refactor and extend a substantial legacy C++ codebase (17/20) that powers our current FDA-cleared devices.

• Architect portable HALs so the same application stack can run across multiple silicon families.

• Implement and tune RTOS-based scheduling (FreeRTOS / Zephyr) and bare-metal ISR paths for sub-µs timing.

• Bring-up new boards: linker scripts, bootloaders, secure-boot chains, OTA update partitions.

• Integrate high-reliability connectivity (Wi-Fi, BLE, CAN, USB) and secure telemetry pipelines.

• Collaborate daily with electrical, optics, mechanical and regulatory teams to hit safety, EMC and medical-device compliance targets.

• Drive code-quality pipelines (GoogleTest/Catch2, clang-tidy, MISRA, GitHub Actions) and mentor peers through design and code reviews.

Must-have qualifications

• 5+ years professional C++ embedded/firmware development (C++17 or later).

• Proven ability to read, debug and extend large, unfamiliar C++ codebases rapidly and safely.

• Hands-on experience with NXP (LPC / i.MX-RT) and/or Espressif ESP32 toolchains and SDKs.

• Deep knowledge of RTOS concepts, interrupt design, DMA, and low-level peripheral drivers (SPI, I C, UART, USB, Ethernet).

• Expertise in secure boot, OTA/DFU, partitioning, key provisioning and anti-rollback techniques.

• Fluent with J-Link/OpenOCD, logic analysers, oscilloscopes, ETM/SWO trace for board-level debug.

• Comfortable crafting CI/CD pipelines and enforcing static-analysis gates for medical-device reliability.

• Strong documentation habit (Markdown/Doxygen) and cross-disciplinary communication skills.

• U.S. work authorization and ability to work on-site in Walnut Creek five days a week.

Nice-to-have extras

• Power-management optimization for battery-powered or thermally-constrained systems.

• DSP or real-time signal-processing (CMSIS-DSP) for laser-pulse shaping or sensor fusion.

• Rust or Zig exposure for safety-critical modules.

• Experience with IEC 62304, ISO 13485, FDA 510(k) or other regulated product lifecycles.

• Python/LabVIEW scripting for manufacturing test fixtures.

Why Azena Medical

• In-office culture – Hardware labs, 3D printers plus daily collaboration with world-class engineers.

• Excellent benefit programs – Comprehensive benefits including employee/dependent medical package, plus dental and vision. Retirement programs including 401(k) and profit sharing.

• The chance to see your code improve patient outcomes in dental surgeries and athletic rehab clinics worldwide.

Company Description

Why We Exist

We believe good oral care is critical to everyone’s health and wellness. Dental professionals and consumers alike should have access to technologies that improve oral health. We are committed to the belief that these technologies should be proven effective through empirical evidence, have elegant & intuitive design, and be as minimally invasive as possible.

How We Work

At Azena, every insight is given a chance to develop, to be validated by science and clinical research, and to inspire the creative minds of our designers and engineers. We continually challenge ourselves to explore innovation for the betterment of oral healthcare. We base our innovation on the foundations of science and aesthetic design to create effectiveness, simplicity, ease-of-use, and overall appeal.

What We Do

With a focus on improving oral healthcare, we design, develop, validate, manufacture, and market world-class devices for both dental clinicians and consumers. We are continually searching for new solutions to enhance oral care. Our offerings are created at the intersection of where art, science, and technology meet.

Join Our Team

Azena's team of engineers and designers have experience developing, manufacturing, and marketing Class IV surgical laser systems for professional dental applications, as well as other dental and oral care products.

Our current suite of professional dental products is distributed in 50+ countries globally. More than a million procedures have been performed using our devices in dental offices all over the world. These products have won numerous design and clinical effectiveness awards, and are widely recognized as leaders within their segments.

We are a privately held organization based in Walnut Creek, California and our products are manufactured locally in the San Francisco Bay Area.

Full-time