Embedded Firmware Engineer
Miami, FL · On-site
About Hextronics
Hex is building the infrastructure for on-demand aerial data. We design and manufacture drone-in-a-box systems that automate repetitive drone operations, taking humans out of the loop so the people who depend on aerial data can move faster. We're a small, agile team, we move fast, take on extreme ownership, and build products in months, not years.
The Role
As an Embedded Firmware Engineer, you'll own the firmware that makes Hex hardware work. You'll write code for resource-constrained microcontrollers, bring up new boards, and debug your own firmware against real hardware with a scope in hand. Because you understand both the code and the circuit it runs on, you'll be the person who resolves the problems that fall between them. This is a hands-on role on a small team, and your firmware ships to systems operating in the field within months.
Responsibilities
Own firmware development for Hex's drone and dock platforms across bare metal and RTOS environments
Bring up new hardware: board power-on, peripheral validation, and debug against schematic and layout
Diagnose firmware and hardware interaction issues independently using oscilloscopes, logic analyzers, and other bench instrumentation
Read schematics, board layouts, and datasheets directly, and account for electrical and physical constraints in your code
Write and execute test and validation procedures for development and production firmware
Serve as the first point of contact for the software and hardware teams on integration and testing of the firmware you build
Drive root cause analysis on firmware and hardware-interaction issues
Contribute to architecture decisions where the firmware, electrical, and software boundaries meet
Requirements
Bachelor's in Electrical Engineering, Computer Science, or a related field
Professional experience writing firmware for resource-constrained targets: bare metal and RTOS environments, anything more constrained than Linux. We're targeting 2 to 5 years, and we'll consider earlier-career candidates who show exceptional promise.
Proficiency in C and C++ for embedded development
Hands-on experience with STM32 or comparable microcontrollers: peripheral configuration, clock and power management, and debugging
Literacy in circuit analysis. You can read a schematic, a board layout, and a datasheet without hand-holding, and you understand the electrical consequences of your code.
Independent use of electrical test equipment to diagnose bring-up and integration problems
Evidence of hands-on building outside formal work: side projects, competition teams, or self-taught depth
Based in Miami or willing to relocate. This role is on-site.
Nice to Have
Firmware on a product that shipped to customers, not only development boards
Experience with low-power, long-range protocols like LoRa and Wi-Fi HaLow
Hardware-in-the-loop or automated test rig development
Motor control or power electronics firmware
Exposure to FCC and equivalent international regulatory testing from the firmware side
Comfort reading Altium schematics and layouts
UAV, robotics, aerospace, or defense industry background
What We Offer
Competitive salary and equity
Comprehensive and highly subsidized medical, dental, and vision benefits for our team and their families
Write firmware that controls physical systems in the field
A small, technical team where your work ships and matters
Hex is an Equal Opportunity Employer. We provide equal employment opportunities to all applicants and employees without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, disability, genetic information, marital status, or
Hex is committed to providing reasonable accommodations to qualified individuals with disabilities and to applicants and employees as required by applicable law.