Senior Firmware Engineer — Ultra-Low-Power Wearables

Saef BV; Schiphol; Hybrid; EUR 70,000 - 110,000; Full time

Benefits offered by this job

Travel expenses covered

Company laptop and phone

Job summary

Saef is seeking a Senior Firmware Engineer to own the firmware at the heart of our luxury watch hardware. You will architect and implement embedded software, optimize ultra-low-power operation, and maintain robust BLE communication with the mobile app.

Join a small, senior team focused on system-level hardware, software, and security. The role emphasizes hands-on development, collaboration, and bringing products from prototype to production in a hardware-constrained context.

Qualifications

• 5+ years writing production embedded firmware in C/C++ on resource-constrained MCUs.
• 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.
• Bias toward shipping working firmware over perfect abstractions with sound engineering judgment.
• Effective in a small, in-person, high-trust team.

Responsibilities

• Architect, write, and ship the embedded firmware that runs our hardware.
• Own power management and ultra-low-power operation; optimize nanoamp usage.
• Build and harden the BLE connectivity layer between device and app.
• Collaborate with hardware team through bring-up, debugging, and silicon iterations.
• Incorporate security and reliability as core design principles.

Skills

Embedded firmware

Low-power design

BLE/wireless connectivity

Hardware familiarity

Shipping-focused engineering

Team collaboration (in-person)

Tools

Oscilloscopes

Job description

Saef is seeking a Senior Firmware Engineer to own the firmware at the heart of our luxury watch hardware. You will architect and implement embedded software, optimize ultra-low-power operation, and maintain robust BLE communication with the mobile app.

Join a small, senior team focused on system-level hardware, software, and security. The role emphasizes hands-on development, collaboration, and bringing products from prototype to production in a hardware-constrained context.