Skills you need to be a firmware engineer
10 skills a hiring manager would actually test for, each with the level this role expects and what it is used for. Not a syllabus — the shape of the job.
Build my path to this roleUpskili checks what you can already do, then sequences only what is missing. No account needed.
What the role requires
Ordered by how much the job depends on it. The bar is the proficiency expected of a competent firmware engineer — not mastery, and not a passing acquaintance.
-
C/C++
Essential
Writes and optimizes firmware for microcontrollers and embedded Linux.
Deep -
Embedded Linux
Essential
Configures kernels, device trees, and custom distributions for embedded targets.
Strong -
Microcontroller architectures (ARM Cortex-M, RISC-V)
Essential
Develops bare-metal and RTOS-based firmware on resource-constrained MCUs.
Deep -
Real-time operating systems (FreeRTOS, Zephyr)
Essential
Designs deterministic, multi-threaded firmware with real-time constraints.
Strong -
Hardware debugging (JTAG, SWD, oscilloscopes, logic analyzers)
Essential
Debugs complex hardware-firmware integration issues independently.
Strong -
Communication protocols (I2C, SPI, UART, CAN, USB)
Important
Implements and troubleshoots low-level peripheral and bus communication.
Strong -
Python
Important
Builds test scripts, automation, and host-side tools for firmware validation.
Working -
Git
Important
Manages firmware source code with branching and collaborative workflows.
Strong -
Reading schematics and datasheets
Important
Translates hardware documentation into correct low-level driver code.
Strong -
CI/CD for embedded systems
Useful
Automates firmware builds and hardware-in-the-loop testing pipelines.
Working
An order worth learning it in
A list of ten skills is the same unhelpful answer a catalogue gives, just sorted. This is where to actually start.
Start here
Essential to the role, and reachable from a standing start. Everything below rests on these.
- Hardware debugging (JTAG, SWD, oscilloscopes, logic analyzers)
- Python
- Git
- Reading schematics and datasheets
Then this
The rest of what the role is assessed on. Harder, and it builds on the foundation above.
- C/C++
- Embedded Linux
- Microcontroller architectures (ARM Cortex-M, RISC-V)
- Real-time operating systems (FreeRTOS, Zephyr)
- Communication protocols (I2C, SPI, UART, CAN, USB)
What sets you apart
Not what gets you hired, but what separates doing the job from being trusted with it.
- CI/CD for embedded systems
You almost certainly have some of this already.
That is the point of starting from the role rather than a course. Upskili checks what you can do, then builds a path across only the gap.
See my path to firmware engineer