Senior Firmware Engineer
‍Full-time | Hybrid | near Schiphol, Netherlands

‍Own the firmware at the heart of Saef, where every nanoamp matters.‍

‍The role
Saef’s hardware comes alive in its firmware. It runs on a tiny, power-constrained device that has to stay reliable, secure, and connected inside a luxury watch for years. As Senior Firmware Engineer at Saef, you own it. You’ll architect and write the embedded software that drives our hardware, make power harvesting and ultra-low-power operation work in practice, and keep the device talking cleanly to the app. This is a hands-on enior role working shoulder to shoulder with our hardware architect and the app team.

‍What you'll get
• Real responsibility from day one in a small, senior team
• Ownership of the firmware at the core of the product
• Pension scheme
• Travel expenses covered
• Company laptop and phone
• The role is for 32-40 hours per week

‍What you’ll do
• Architect, write, and ship the embedded firmware that runs our hardware
• Own power management and ultra-low-power operation; on a device this small, every nanoamp matters
• Build and harden the BLE connectivity layer between device and app
• Work hand in hand with the hardware team through bring-up, debugging, and iteration on real silicon
• Build with security and reliability as first principles; a device that fails or can be tampered with breaks the promise we sell

‍What we’re looking for
• 5+ years writing production embedded firmware, ideally in C/C++ on resource-constrained microcontrollers
• Deep experience with low-power design and real-world power optimisation
• Solid command of BLE and wireless connectivity in embedded contexts
• Comfort working close to hardware: schematics, datasheets, oscilloscopes, and board bring-up
• A bias toward shipping working firmware over perfect abstractions, paired with sound engineering judgment
• Effective in a small, in-person, high-trust team

‍Nice to have
• Experience with energy harvesting or battery-free designs
• Familiarity with secure boot, cryptography, or hardware security on embedded devices
• Exposure to consumer hardware, wearables, or miniaturised electronics
• Experience taking an embedded product from prototype through certification to production

‍About Saef
‍Saef is building the new protection standard for luxury watches. Invisible, always-on hardware goes into the watch. A phone app tells the owner where it is and that it’s safe. We’re a small, senior team of engineers and designers that treats this as a system-level problem: hardware, software, security, and trust, all built together. We’re launching with select partners,with beta planned in 2027. We can demo a real working product at any stage of development. That’s not a tagline. It’s how we work.

‍Apply
‍Interested? Send us your CV and a short introduction and we'll take it from there.

Please note
We manage our recruitment process in-house for all our vacancies. We kindly ask recruitment agencies not to send unsolicited CVs or contact us regarding any of our open positions.