Selected Work

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Founder · 2022 — Present

Ubo

A privacy-first agentic AI assistant pod you can modify, extend, and manage from anywhere with a wide range of clients.

I founded Ubo, an open-source framework for building agentic AI assistants for developers and tech enthusiasts. It combines software and hardware co-design through a hyper-modular architecture, a reactive core, and a universal interface that runs everywhere — built-in GUI, web, iPhone, watchOS, macOS, Android, ESP32, and more. Funded on Kickstarter by hundreds of backers, it was well received by the developer community and covered by notable publications.

• Hardware
• Open Source
• Embedded Linux
• Python

Visit site → Source →

Co-Founder · 2019 — 2021

Picovoice

Tiny, efficient AI models that brings intelligence to edge devices.

I co-founded Picovoice, a startup training hyper-efficient edge AI models that run on resource-constrained devices. We began with voice AI — wake word detection, speech-to-intent, speech-to-text, text-to-speech, speaker diarization, speaker identification, and noise suppression — and later expanded to multi-modal vision and language models. Picovoice products have been used by hundreds of thousands of developers to date. During my tenure, I led technical marketing, benchmarking, product, and sales. The video below demos our speech-to-text model running on a Raspberry Pi Zero.

• Edge AI
• Voice AI
• Machine Learning

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CTO · 2018 — 2019

Havyn

End-to-end IoT hardware and fleet software for secure, contactless package delivery at apartment communities.

Havyn was a multi-family IoT platform that let delivery services access property gates and leave packages securely in appliance-like lock boxes. I joined as CTO and led end-to-end system design and implementation across IoT hardware, software, and the fleet-management backend. We completed the full system and closed a distribution deal with one of the largest residential management firms to host lockers nationwide. Ultimately, a lack of operating capital for scaling manufacturing forced us to wind the operation down.

• IoT
• Hardware
• Embedded Systems

Visit site →

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Founder · 2016 — 2018

MoveSmart

Fleet-management software and telematics hardware powering bike- and e-bike-share programs in cities worldwide.

I created MoveSmart, a vehicle-sharing platform powered by BitLock connected hardware. It began with bike share and expanded to support e-bikes and other electric vehicles. The product included a fleet-management backend, user-facing mobile apps (iOS, Android), and access-control and telematics hardware. Several operators used it to manage their fleets in cities worldwide. We also developed a battery-swapping kiosk concept for e-bikes and e-vehicles for Toyota Innovation.

• IoT
• Mobile Apps
• Fleet Management

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Founder · 2013 — 2016

BitLock

The lock that kicked off smart, keyless bike security — thousands shipped worldwide after a viral Kickstarter debut.

I designed the first Bluetooth-enabled bicycle lock and took it from concept to mass production. Launched on Kickstarter in 2013, it raised $130K in 30 days from 1,000 backers. Over the next few years, several thousand BitLocks were manufactured in Taiwan and shipped worldwide.

• Hardware
• Bluetooth
• Consumer Electronics

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Academic Work

Publications

Selected, most-cited work in hardware security — physical unclonable functions (PUFs), true random number generation, and FPGA security. Full list and live metrics on Google Scholar.

1. 2008

   Lightweight Secure PUFs

   M. Majzoobi, F. Koushanfar, M. Potkonjak — IEEE/ACM International Conference on Computer-Aided Design (ICCAD)

   486 citations Conference Paper
2. 2012

   Slender PUF Protocol: A Lightweight, Robust, and Secure Authentication by Substring Matching

   M. Majzoobi, M. Rostami, F. Koushanfar, D. S. Wallach, S. Devadas — IEEE Symposium on Security and Privacy Workshops

   316 citations Conference Paper
3. 2008

   Testing Techniques for Hardware Security

   M. Majzoobi, F. Koushanfar, M. Potkonjak — IEEE International Test Conference (ITC)

   293 citations Conference Paper
4. 2009

   Techniques for Design and Implementation of Secure Reconfigurable PUFs

   M. Majzoobi, F. Koushanfar, M. Potkonjak — ACM Transactions on Reconfigurable Technology and Systems (TRETS)

   287 citations Journal Article
5. 2010

   FPGA PUF Using Programmable Delay Lines

   M. Majzoobi, F. Koushanfar, S. Devadas — IEEE International Workshop on Information Forensics and Security (WIFS)

   261 citations Conference Paper
6. 2011

   FPGA-Based True Random Number Generation Using Circuit Metastability with Adaptive Feedback Control

   M. Majzoobi, F. Koushanfar, S. Devadas — Cryptographic Hardware and Embedded Systems (CHES)

   230 citations Conference Paper

View all publications on Google Scholar →

Academic Work

Talks & Video

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  FUTO · 2025

  Building an Open, Modular, and Hackable Hardware

  The design philosophy and engineering behind Ubo — an open, modular, and hackable hardware platform for self-hosting apps and running a customizable, privacy-first AI assistant you can actually take apart and extend.

  Watch →
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  Hackaday Supercon 2024 · 2024

  The Secrets of Agile Manufacturing

  How the Ubo open-source home pod is designed, built, and manufactured — practical techniques for small-volume production and incremental builds that cut cost, add flexibility, and make mistakes less expensive, across both electronics and mechanical parts.

  Watch →
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  Microsoft Research · 2011

  Automated FPGA Verification and Debugging

  A framework that automates the tedious parts of FPGA debugging and verification — mining assertions from simulation or hardware traces, generating Verilog assertion-checking engines, auto-inserting signal probes, and varying clock frequency on the fly, all while preserving the original placement. From my work as a Microsoft Research intern.

  Watch →