Founding Firmware Engineer

Suna; San Francisco (CA); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

MacBook Pro

Noise-cancelling headphones

Desk setup quality

Equity

Job summary

Suna in San Francisco is seeking an embedded firmware engineer who will own the code on the device, reading the body around the clock with a tiny battery. You will work with a small founding team on firmware, BLE, power management, and on-device data pipelines.

This is a full-time, in-person role at our SF office, with salary plus equity and a dynamic schedule that may include weekends. Join us to help close the data gap in wearables and health tech while shaping the future of a consumer

Qualifications

• You shutter embedded code on constrained, battery-powered hardware.
• BLE reliability in real-world conditions is essential.
• Familiarity with on-device data pipelines and power management.

Responsibilities

• Own the code that runs on the wearable device.
• Ensure continuous data capture and battery-efficient operation.
• Develop and optimize sensor drivers and on-device processing.

Skills

Embedded firmware

BLE

Battery-powered hardware

Firmware optimization

Tools

FOTA

BLE stack

Sensor drivers

Job description

About Suna

We want people to experience their healthiest bodies, on their own terms.

To do that, we're closing the data gap that exists in wearables today, gut health and nutrition.

Suna is a wellness wearable for your gut. It listens to your gut around the clock, through sound, and turns what it hears into something you can read every morning. Think of it as the Fitbit for your gut and nutrition. On top of it sits the Oracle, a personal health agent. It joins what the patch hears to the context of your life, what you ate, your calendar, the weather, your email, and talks to you where you already are, on WhatsApp or iMessage. We are a small founding team in London and San Francisco, and we build the device, the models and the app ourselves.

The role

You own the code that lives on the device itself. Reading the body around the clock, on a tiny battery, never losing a night of data.

You may own

• Firmware: sensor drivers, on-device data pipeline, power management, FOTA.
• BLE that syncs reliably in the real world.
• Every hour of battery life out of the hardware without dropping a sample.

You'll fit if

• You have shipped embedded code on constrained, battery-powered hardware and lived with the consequences.
• Devices in the field, soldering-iron side projects and open source drivers count more than a CV.

Nice to have

• Took a consumer device through manufacturing
• Time at a wearable or in IoT

How we work

Full-time, in person, at our San Francisco office. This role is San Francisco only.

Salary plus equity.

We work a lot (including weekends) and it will never be a strict 9-to-5.

This is not for you if

• No prior interest in health and health tech.
• You are high maintenance.
• You hop jobs. It is a red flag for us.
• You chase big names and vanity metrics over the mission.
• You want a strict 9-to-5. This will never be that.
• Benchmark-leading salary, set against your experience and the market.
• Meaningful equity. You share directly in what we build.
• Top-spec kit as standard: new Mac, noise-cancelling headphones, a proper desk setup, whatever you need.
• Dinner on us when the work runs late.
• Visa sponsorship and relocation support where needed.