4Rooks · ROSA

The best firmware team is your own.

ROSA is what backs it: managed Zephyr and Linux, scalable firmware modules, hardware-in-the-loop testing, CRA readiness, transparency for management.

Let's talk How an engagement starts

Sound familiar?

The budget

Firmware eats up more of it every year, and nobody can say exactly where it goes.

More product per engineer →

Release day

Every release takes longer than promised and ends in a nervous wait.

Ship on facts →

The CRA clock

It's on your desk, with dates attached: 11 September 2026, then 11 December 2027.

Check your readiness →

Every hardware variant means another firmware project, and the last one is already three revisions behind. It's not just you. Every device maker pays this bill, for every product, every year. So we built ROSA: software your team runs. The groundwork arrives as ready-made modules and generated code, straight into your repos. We keep it current. All of it is yours.

See it

Every product's real status, without asking anyone for it.

ROSA's web interface covers your whole product portfolio: status and forecasts for management, policies for architects, the daily work for engineers. Same records, no separate reporting.

ROSA, your portfolio status with forecasts

Every project: progress, forecast, test results, upcoming milestone, derived from the records, not from Friday reports.

ROSA, the architecture editor

Architecture set within company policies: approved hardware, module allow-list, patterns. Deviations are explicit, never silent.

Explore ROSA →

Who gets what

Equipment for the organisation you have.

Engineers The repeat work handled. Your CI, your IP. More product per engineer → Quality engineers Tests without ceremony, results everyone can see. Software quality → Security & compliance A live SBOM and exportable evidence, every release. CRA readiness → Management Real status, without asking anyone. See ROSA →

2 days

From "where do we stand?" to your team's prioritised plan: CRA readiness, software quality, or more product per engineer.

up to 75%

Lower cost than doing the same platform work in-house: ROSA manages Zephyr & Linux for you, so budget and people go to product instead.

>95%

Of your team's firmware modules carry over to the next hardware variant. Nobody starts from square one.

What we solve

Three problems. One product solves all three.

All three are worth doing on their own, and together they compound.

Efficiency

Engineering Leverage

ROSA carries what's identical across every product: board support, connectivity, OTA, security management, so one team covers a range that used to need three.

See the economics →

Compliance

CRA Readiness

SBOM, CVE handling, secure updates, evidence per release: generated as a by-product of building, not assembled before audits. The deadlines are fixed and already on the calendar.

See where you stand →

Quality

Software Quality

Test like a software company, on real hardware: authoring, emulated + HIL execution, results visible in your existing CI, release gates that check themselves.

See the quality stack →

CRA reporting obligations apply from 11 September 2026.

If you can't produce a current SBOM for every product in the field, the clock is already against you.

Check your readiness →

However you build

In-house, software house, or white-label: ROSA works with all three.

We don't ask you to change how you source your firmware. Whichever way you build, ROSA adds what's usually missing: transparency, speed, and evidence you own.

What ROSA gets you: Your engineers stop rebuilding the parts that are the same in every product. Board support, connectivity, OTA and security patches are maintained for you, with the cost shared across every team that uses ROSA. The quality stack and ROSA's status views add the visibility home-grown setups never had time to build.

Your architecture, your IP, your roadmap, with capacity back on product.

Learn more about ROSA →

Get in touch

Tell us where firmware hurts

The first conversation is 45 minutes. No commitment, no sales deck, just an honest look at your situation.

You'll talk to the people who build ROSA: led by Markus Fischer, principal architect of the Mercedes-Benz MBUX system, with a team of six embedded platform engineers, 60+ years of combined experience and 20+ products shipped to production.

Not sure what to expect? See how a typical engagement works →