Last updated: October 9, 2026
By Tom Kenaley, President and Senior Partner, KORE1
A firmware engineer job description should name the silicon, the RTOS, where the product sits in its life, who owns the bootloader and the update path, the memory and power budget, and a published pay range. Most postings name the first two and stop. That is why the pool arrives wrong.
There is a good version of the hardware paragraph already floating around our industry. Name the part. Name the RTOS. List only the protocols the product actually uses. We wrote that advice ourselves in our guide to hiring firmware engineers, and on the firmware engineer staffing desk it still holds.
It also stopped being enough about three years ago.
Naming an STM32H7 and FreeRTOS tells a candidate what hardware is on the bench. It tells them nothing about what they are responsible for. And responsibility is the thing firmware engineers actually sort themselves by, because the gap between adding a feature to a shipping platform and owning the path by which 40,000 fielded units take a new image is not a skill gap, it is a different career.
A wearable company in Carlsbad learned this in public. Their posting was textbook. Firmware engineer, C and C++, STM32, FreeRTOS, BLE, two years minimum, medical device experience preferred. Clean. Specific about the hardware. Forty-one applicants in five weeks, and the hiring manager liked about nine of them.
Then the panel started asking what the job was.
The role was not feature work. Their product had been in the field for two years, the update mechanism had been written by a contractor who was gone, and roughly 40,000 units were running an image nobody on staff fully understood. They needed someone to take ownership of that. Resign the bootloader. Prove a failed update could not brick a unit on a customer’s wrist.
Of the nine candidates they liked, one had ever done it.
We rewrote two paragraphs. The posting now said the hire would own the bootloader and the over-the-air update path for a fielded fleet, that the existing implementation was undocumented, and that the first deliverable was a rollback that worked. Twenty-two people applied over the next six weeks. Six had shipped an update system. The hire came out of an industrial sensor company and started at $168,000. That is typical, since instrument makers employed 33,020 software developers in May 2025, the largest hardware pool, and it is where firmware recruiters who know which companies to call start.
Smaller pool. Right pool.
The Hardware Paragraph Describes the Bench, Not the Job
Our recruiters average more than fifteen years each, and across thirty-plus U.S. metros the firmware postings we are handed fail in a consistent way. They are precise about the things that are easy to be precise about. Part number. Toolchain. Protocol list. Years of C.
All of that is real, and a candidate genuinely does read the part family in about five seconds to decide whether this is hardware they already know or hardware they would be learning on somebody else’s deadline. Keep it. None of it answers the question a strong firmware engineer is actually asking, which is some version of “what breaks if I do this badly, and will I be the one holding it.”
Five ownership questions decide who applies. The hardware paragraph answers none of them.
| What Your Posting Probably Says | What the Candidate Cannot Tell | The Line That Fixes It |
|---|---|---|
| “Develop firmware for embedded products” | New silicon or a platform shipping for six years | Where the product is in its life |
| “Experience with bootloaders a plus” | Whether they will own the update path or inherit it | Who owns boot and update, by name |
| “Optimize for performance and efficiency” | Whether there is a real ceiling or a vague wish | The flash, RAM, power, and boot-time budget |
| “Hands-on debugging in a lab environment” | Whether they get a board and a scope, or a queue | Bench and board allocation |
| “Work with vendor SDKs and drivers” | Whether they write the abstraction or consume one | Who authors the HAL |
The rest of this is how to answer each one in a sentence or two, and then a template you can copy.
Say Which End of the Product’s Life You Are Hiring For
Three firmware jobs hide under one title, and they are not graded versions of each other. One takes a part that has never executed a line of code and gets it to a blinking LED. One keeps a shipping product alive, which means field failures, errata, supply substitutions, and a release every few months that cannot regress. One moves a working codebase from the part that went end-of-life to the part the purchasing team found.
Bring-up people are often bored by sustaining work. Sustaining engineers, the genuinely good ones, tend to find bring-up thrilling for about four weeks and exhausting after that, because the thing they are actually excellent at is the discipline of not breaking something that thousands of people depend on.
A port is its own animal. Half archaeology, half negotiation with a peripheral that is almost the same.
| Lifecycle Position | First 90 Days Looks Like | Put This in the Posting |
|---|---|---|
| Bring-up on new silicon | Clocks, boot pins, memory map, first peripheral | “This part has not run our code before. You take it from reset.” |
| Sustaining a shipped product | Field returns, errata, a release that cannot regress | “The product has been in the field since [year], across [N] units.” |
| Port to a new part | Reading someone else’s HAL, mapping peripheral deltas | “Moving from [old part] to [new part]. The old code works.” |
Pick one. If the honest answer is that the role is all three, say that too, and say which one eats the most calendar. Candidates handle blended roles fine. What they cannot handle is finding out in month three that the interesting part was ten percent of the year.
Name Who Owns the Bootloader and the Update Path
This is the single most frequently omitted line in firmware postings, and it has become the most expensive one to omit.
Field updatability stopped being a differentiator and became an obligation. The IETF published RFC 9019, A Firmware Update Architecture for Internet of Things, back in April 2021, describing what a reliable and secure update mechanism has to do on a resource-constrained device. Nothing in that document is exotic now. Signed images, a manifest, an atomic swap, a rollback that survives a power cut at the worst moment.
Then the regulatory floor moved. Under the EU’s Cyber Resilience Act, Regulation (EU) 2024/2847, reporting obligations have applied since 11 September 2026, with the main obligations arriving 11 December 2027. For a hardware company selling into Europe, that turns “we should probably be able to push an update” into a staffed function with a clock on it.
So the posting has to say who that is.
Three honest versions of the line, and they recruit three different people. “You will own the bootloader and the OTA update path end to end, including rollback and signing.” “An update path exists and you will own and harden it. It is undocumented.” “Updates are owned by the platform team. You write application firmware against their API.” The third one is a perfectly good job. Say it, and you stop wasting the time of the people who wanted the first one.
One more thing worth a sentence in the posting. Somebody has to be reachable when a vulnerability report lands, and under the CRA’s reporting regime that is no longer a theoretical duty. If this hire is in that rotation, write it down. Our firmware engineer interview questions cover how to test for it once the req is open.
The Budget Is a Spec, So Publish It
“Optimize for performance and memory efficiency” is not a requirement. It is a mood.
Firmware is one of the few disciplines where the constraints are genuinely numeric and genuinely known, usually before the req opens. Somebody picked the part. That decision fixed the flash and the RAM. Somebody sized the battery and promised marketing a runtime. Somebody told a customer how fast the thing wakes up. Those numbers exist. Putting four of them in the posting does more candidate filtering than another two years of required experience ever will, and it signals to a senior engineer that the team knows what it is building, which matters more than people expect when the candidate has three other conversations going.
What to publish, with the caveat that you only publish what is true:
- Flash and RAM ceiling, and how much is already spent. “512 KB flash, roughly 380 KB in use” is a far better recruiting line than it looks.
- The power budget in the unit the hardware team actually argues in. Microamps in sleep. A milliamp-hour-per-day figure. A runtime promise with a battery size attached.
- Boot time, if anybody has ever complained about it.
- Whether any of this is currently missed. A team that is 40 KB over its flash budget and says so will hear from engineers who find that specific problem fun. There are more of them than you think.
A caution on the last one. Do not publish a budget you intend to renegotiate the week after the hire starts. Firmware engineers treat a stated ceiling as a commitment, and discovering in month two that the number was aspirational reads as the team not knowing its own product.
Bench Reality Is a Term of Employment
An automotive supplier near Ann Arbor hired a strong firmware engineer at the top of their band and lost him in eleven weeks. Nothing went wrong with the work. There were two boards for four engineers, a single scope shared with the hardware team, and a sign-up sheet.
He had come from a place where he had his own bench.
Nobody lied to him. The subject never came up, because board allocation is the kind of thing that feels like a facilities detail to everybody except the person whose entire productive day depends on it. Candidates almost never ask, either. It sounds like an ungrateful question in an interview.
Write it into the posting and you get credit for candor:
- Does this person get their own board, or share? How many revisions behind is the shared one?
- What is on the bench. A J-Link or a Lauterbach. A Saleae or a real scope. Whether there is a hardware-in-the-loop rig or whether testing means a person watching an LED.
- Is there a hardware engineer in the building, and do they answer questions. This is the best retention signal a firmware posting can carry, and it costs nothing to say.
- Lab access hours. Badge access at 11pm is a feature for some of these people.
Remote firmware work is possible and we place it. It requires shipping hardware to a home office and accepting that some bugs will wait for a lab day. Say which model you are running. “Hybrid, three days on-site, lab days are Tuesday and Thursday” is the kind of sentence that gets a reply.
Who Writes the HAL
Quietly one of the biggest seniority signals in the whole posting, and it almost never appears.
There is a version of this job where the vendor SDK is the platform. You call the STM32Cube or nRF Connect or ESP-IDF function, it works, you move on, and the abstraction someone else wrote is a floor you stand on. There is another version where the team has decided the vendor layer costs too much flash or is too hard to test, so the hardware abstraction is in-house, and this hire is one of maybe three people who will ever touch it.
Different engineers. The second group will ask about unit testing firmware on a host within twenty minutes of the first call, every time.
One line does it. “We build on [vendor SDK] and do not plan to replace it,” or “We maintain our own HAL and you will own [these peripheral drivers].” If the answer is that the team is currently deciding, that is genuinely interesting to a senior candidate, so say that instead of picking a side you have not picked.
Print the Range
Firmware comp has a wide published spread because the title covers silicon vendors and industrial controls equipment in the same bucket. The Bureau of Labor Statistics put the median annual wage for computer hardware engineers at $161,740 in May 2025, with employment projected to grow 9 percent from 2025 to 2035 and about 4,100 openings a year over that decade. Our desk sees mid-to-senior firmware roles landing between $125,000 and $175,000 base across most U.S. metros, with a premium of $15,000 to $25,000 where the person owns the update pipeline, the build system, or a safety certification. The firmware staffing market breakdown has the aggregator figures side by side, and the embedded systems engineer salary guide goes metro by metro.
Whatever your number is, print it. In a growing number of states you have no choice, and the rules are more specific than most hiring teams realize.
Washington is the sharpest example, which matters because the Seattle corridor is a real firmware market. Under the state’s Equal Pay and Opportunities Act, Washington’s Department of Labor and Industries requires employers with fifteen or more employees to include a wage scale or salary range in the posting, plus a general description of all benefits and of other compensation. A single fixed wage has to be stated as that exact amount. Open-ended ranges do not satisfy it.
California, Colorado, Illinois, Minnesota, New Jersey, Vermont and Massachusetts all have their own versions, with their own employee thresholds, their own effective dates and their own definitions of what counts as a good-faith range for a role you have not filled yet. If you post in more than one state, have counsel confirm which rule binds you before the req goes live rather than after.
Firmware Engineer Job Description Template
Copy it, fill in the brackets, delete what does not apply. Bracketed notes marked “Internal” are for the hiring team and should not be published.
Job Title
[Firmware Engineer] or [Senior Firmware Engineer, Bootloader and Update] or [Firmware Engineer, Platform Bring-Up]. Internal: if the title must stay plain “Firmware Engineer,” the lifecycle position goes in the first sentence instead.
The Product and Where It Is in Its Life
[Company] builds [product, in one plain sentence] for [market]. The [product or platform] runs [part number and core, for example an STM32H7 Cortex-M7] with [RTOS or bare-metal, named]. [Pick one: This part has not run our code before and you will take it from reset. / This product has shipped since (year), across roughly (N) units in the field. / We are porting a working codebase from (old part) to (new part).]
What You Will Own
[The one or two things that are genuinely this person’s, stated as ownership rather than activity. For example: the bootloader and over-the-air update path, including signing and rollback. Or: the sensor acquisition pipeline and its drivers.] [Say plainly whether the existing implementation is documented.] Internal: if you cannot name an owned component, the role is not scoped yet.
The Update Path
[Pick one: You own the bootloader and OTA update path end to end. / An update path exists and you will own and harden it. / Updates are owned by (team) and you write application firmware against their API.] [If this hire is in the rotation that responds to a reported vulnerability, say so. Internal: if you sell into the EU, the CRA reporting clock is already running.]
The Budget You Are Working Inside
- [Flash and RAM, with how much is already spent.]
- [Power budget in your team’s own unit: sleep current, mAh per day, or a runtime promise with a battery size.]
- [Boot time, if it is a requirement.]
- [Internal: if you are currently over on any of these, saying so attracts the right people. Do not state a ceiling you plan to renegotiate.]
Your Bench
[Your own board at rev (N), or shared with (N) engineers.] [Debug and instrumentation available: probe, scope, analyzer, HIL rig.] [Whether a hardware engineer is in the building and available.] [Lab access and hours.] [On-site, hybrid with named lab days, or remote with hardware shipped.]
What You Bring
- [X or more] years of production firmware in [C / C++ / Rust], on [the relevant architecture, named].
- [The one thing the owned component actually requires. Shipped an OTA update system. Brought up a new board from reset. Took a product through (standard).]
- [Experience in a comparable constraint environment, stated plainly. Battery-powered. Safety-certified. High-volume consumer.]
- [One more that genuinely predicts success here. Then stop adding bullets.]
Not Required
[Our exact part family, our RTOS, our industry, a degree in electrical engineering, or prior experience under (standard). Name which of these you will teach. It widens the pool at no cost and tells candidates you know the difference between a skill and a familiarity.]
Pay, Benefits, and Location
Base salary [range]. [Bonus or equity, if any.] [Benefits summary.] [City, State], [on-site, hybrid with X days, or remote]. [Internal: print the range. Washington, California, Colorado, Illinois, Minnesota, New Jersey, Vermont and Massachusetts each require some version of it, and Washington also requires a general description of benefits and other compensation in the posting itself.]
Where Hiring Managers Push Back
Does naming the exact part number really narrow the pool that much?
It narrows the applicant count and widens the qualified count. Engineers read the part family in about five seconds and decide whether this is hardware they know or hardware they would be learning on your schedule.
The fear is usually that an STM32 posting turns away a strong Nordic engineer. In practice the strong ones apply anyway and address it in the first paragraph of their note, which is useful information about them. The people a named part actually turns away are the ones who were going to apply to everything.
We genuinely do not know yet whether this person owns the update path.
Then the posting should say the ownership is being decided, and name who it is being decided between. Candidates read an honest unknown very differently from a silence.
Worth saying out loud, though. If nobody can tell you who owns boot and update on a product that is already shipping, you have found something more urgent than a hiring problem, and it is better found now than during a vulnerability report.
Our board situation is bad. Won’t publishing that scare people off?
Some, yes, and those were going to leave in month three anyway. Eleven weeks is what it cost the Ann Arbor supplier to learn that lesson at full freight.
There is also a version of this that recruits. “Two boards for four engineers today, four more arriving in Q1” is a constraint with a date attached, and engineers are reasonable about constraints with dates attached. It is the undated ones that read as permanent.
How many years of experience should we ask for?
Count products shipped, not years served. Four years at a company that shipped three products is a deeper well than nine years on one platform that went to manufacturing once.
Then set the number a notch below where you want to land. Nearly every firmware engineer we have placed had at least one hiring manager who almost screened them out on a year count, and the one that comes to mind had eight years against a posted ten and had personally shipped two bootloaders.
Should the posting mention the take-home or the board exercise?
Yes, with a time box in writing. Firmware candidates are unusually wary of take-homes, because the bad version of a firmware exercise can eat an entire weekend and a borrowed dev kit.
“A 90-minute conversation over a fault dump and a linker script, scheduled when it suits you” removes the main reason good candidates go quiet mid-process. Put the format in the posting and the exercise itself somewhere else.
We need this for nine months, not forever. Does the posting change?
The ownership section does. A contract firmware engineer needs to know on day one what they are expected to leave behind, because the handoff is the deliverable.
Name the artifact. A documented bootloader. A test rig somebody else can run. A port that builds from a clean checkout. We staff these as contract engagements regularly, and the ones that go well are the ones where the posting named the artifact instead of a duration.
Is a firmware posting different from an embedded software posting?
Different enough that the keyword changes who applies. “Firmware” skews toward engineers who expect bare-metal or RTOS work close to the silicon, and toward hardware-led employers.
If your product runs embedded Linux with an MMU and a package manager, you are likely writing a different req, and our embedded software engineer job description template is the closer fit. Decide which layer the work actually lives at before you pick the title, because the title is doing more sorting than the requirements list underneath it.
Write the Ownership, Not the Stack
The hardware paragraph is the easy half and most teams already do it well. The half that decides your pool is four or five sentences about what this person is responsible for, what numbers they have to live inside, and what equipment sits on their desk.
None of it requires knowing anything you do not already know. It requires writing down decisions the team made months ago and never put in the posting.
If you want a second set of eyes on a firmware req before it goes live, that is most of what our firmware engineering search desk does in a first call. You can talk to a recruiter and bring the draft.
