WE WORK 6 DAYS A WEEK.

Noso (YC S25) builds AI tools for the trades. NoWare is our hardware line. The first product is an indoor air quality sensor that HVAC contractors leave in the home: a small cube that tracks VOCs, CO2, temperature, humidity, and light, shows air quality on a glanceable LED, and streams readings to Noso over Zigbee and BLE.

We are looking for a Hardware Engineer Intern who wants hands-on experience taking a real sensor from prototype to customer homes, working directly with our Hardware Engineer and the founders.

What You Will Do

• Build and test NoWare sensor boards: assembly, bring-up, and debugging with a scope and a soldering iron
• Write firmware in C on ESP-IDF for sensor sampling, calibration, LED behavior, and Zigbee or BLE pairing
• Run sensor validation: compare readings against reference instruments and characterize drift, warm-up, and placement effects
• Build test fixtures and scripts that catch bad boards before they ship
• Go onsite with technicians to install sensors in customer homes and bring back what broke

Qualifications

• You are pursuing a degree in EE, CE, CS, or a related field
• Your GPA is over 3.7
• You are from a top college
• You have built something physical that worked: a robotics project, a PCB, a hackathon device, or a personal hardware project
• Comfortable in C or C++ on a microcontroller and in Python for tooling
• Detail-oriented, able to multitask

Interview Process

• You complete the NoWare hardware take-home: start from the open-source AirCube board, add a PM2.5 sensor and cellular with a SIM card, remove Zigbee, write the firmware, and get it working on real hardware
• Once your PCB design is finished, we cover the production cost of your board
• Finish it end to end, tested and working, and the internship is yours — guaranteed
• When it works, you book your founder interviews: one with Winston, CEO of the company, and one with Alex, CTO of the company, each walking through your build
• You come onsite and ensure the team likes you