Andrew Gui

Experience

1. Undergraduate Researcher UW Wearable Intelligence Lab Oct 2026 – Present Adaptive video coach · MediaPipe · particle-filter tracking

   Adaptive Demo Video — Learning Physical Skills Faster

   Advisor: Prof. Yiyue Luo

   The lab uses on-body sensing and machine learning to help people learn physical skills faster. I'm on the software side of a three-person team building a closed-loop motor-learning system: the lab's Sensorimotor Stickies (adhesive BLE IMU modules) are paired with MediaPipe pose tracking, and the instructor video slows down, speeds up, or pauses in real time based on how closely the learner's movement matches the instructor's.

   • Extract the instructor's skeleton and joint angles from demo videos with MediaPipe, as the reference motion
   • Connect the Stickies' 100 Hz IMU stream to a real-time motion tracker, calibrated against reference movements
   • Implement a particle-filter tracker, based on the Gesture Variation Follower, that estimates where the learner is in the demo, how fast they're moving, and when they're lost or holding a pose

   Python MediaPipe BLE IMU Signal Processing Particle Filters Sensor Calibration HCI Research

   How the tracker works ↓

2. Founder & President Fitness Tech @ UW Oct 2025 – Present 40+ members · shipped MyFitnessTech · ~$3.5K raised

   Founded Fitness Tech in October 2025: a student-led Engineering Student Organization that builds wearable health hardware and software. It has grown to 40+ members with hundreds of applicants, and I mentor 25+ students across the hardware, firmware, and app teams and set the technical direction for its projects.

   Software

   Built MyFitnessTech's framework and backend infrastructure (Flutter/Dart, Firebase, RevenueCat), and develop and maintain it with the software team. Set up the Apple and Google developer accounts and shipped it to the App Store and Google Play.

   Business & Operations

   Secured ~$3.5K in funding by coordinating member-run fundraising events, hosting fundraisers with partner companies, and reaching out to individuals and companies for sponsorship. Recruited the faculty advisor, wrote the constitution, drove SAO registration and the ESO conversion, set up the club's banking, and wrote a $10K–$15K Student Technology Fee proposal for prototyping equipment, now under committee review.

   CITI-certified for human-subjects (IRB) research, for the club's research side.

   About the club ↓

3. Undergrad Technical Intern — EE PNNL Jun 2024 – Present RF prototype PCB in Altium · SMD rework · Mini Sensorfish

   RF Prototype PCB — Altium Rebuild

   Independently rebuilt the schematic and multi-layer layout in Altium Designer for a prototype board carrying all the components of a compact RF telemetry transmitter. I reproduced the reference design to validate its layout topology and to find the components the miniaturized version doesn't need, and the rebuilt design was sent out for fabrication. I also assemble and rework the SMD prototype boards — hot-air reflow and fine-pitch hand soldering under a stereo microscope — then bench-verify continuity, power rails, and the FSK oscillator output on an oscilloscope.

   Altium Designer Multi-Layer PCB RF SMD Rework Oscilloscope Debug

   Mini Sensorfish — Fish Passage Through Dams

   Mini Sensorfish are autonomous sensors that travel through hydroelectric dams the way a fish would. I analyze their pressure, rotation, and acceleration data to show what fish go through on the way, for environmental impact assessments. I also calibrate the devices, run acceptance tests, and field-test them before they go out to dam sites.

   Python Sensor Data Analysis Calibration Field Testing

4. Christmas Light Tech

   Radiant LLC Nov 2023 – Feb 2024

   Custom holiday lighting installations, safety protocols for elevated work, team training.

5. HPC Intern MICRO 2024 PNNL Jun 2023 – Aug 2023 LLM accelerators on FPGA · LNS vs. floating point

   AI Hardware — LLM + LNS Architecture Codesign

   Compared Logarithmic Number System and floating-point arithmetic for FPGA-based LLM inference accelerators, and contributed to the dynamic data format and architecture codesign. Co-authored the resulting paper, published at MICRO 2024.

   LLMs LNS FPGA Accelerators Architecture Codesign

   Publication

   Bridging the Gap Between LLMs and LNS with Dynamic Data Format and Architecture Codesign

   Haghi P., C. Wu, Z. Azad, Y. Li, A. Gui, Y. Hao, and A. Li, et al.

   57th IEEE/ACM International Symposium on Microarchitecture (MICRO 2024) • Austin, TX • Nov 2024

   View Publication →

6. Crew Member

   McDonald's Nov 2022 – Jun 2023

   I just put the fries in the bag. Sometimes nuggets or even a burger.

Projects

A wireless stethoscope, health technology research, and the Fitness Tech app plus the hardware that talks to it.

🩺 Digital Stethoscope Prototype Hardware lead — independent student team

A low-cost wireless stethoscope, built with a team of UW engineering students to make heart screening more accessible, starting with athletes. A 3D-printed chestpiece funnels heart sounds to a sealed MEMS mic; a XIAO ESP32-C3 filters the audio and streams it over Bluetooth to a live browser view the whole team can watch remotely.

XIAO ESP32-C3 BLE I²S INMP441 3D Printing Fusion 360 Cloudflare Workers JavaScript

• Designed the 3D-printed chestpiece, diaphragm clamp, and prototype enclosure (body, box, lid)
• Wired and soldered the I²S mic to the board; working on the PCB and LiPo power stage
• Wrote the BLE firmware: on-chip integer low-pass and decimation from 16 kHz to 4 kHz so audio fits over BLE
• Built the live viewer (Web Bluetooth, waveform + spectrum) and a Cloudflare Worker relay for remote viewing

Student prototype, not a medical device.

🎬 Adaptive Demo Video In Progress WILab research — wearables + computer vision

Wearable sensors tell the video where you are. Joint angles from the lab's Sensorimotor Stickies are matched live against the instructor's MediaPipe skeleton, so the demo speeds up, slows down, or waits for you, instead of you chasing a fixed-speed video.

Python MediaPipe BLE IMU Particle Filter HCI

How the tracker works

• Holds ~1,000 guesses about the learner at once, each with a phase (where they are in the demo), a speed, and a scale
• Every IMU sample: advance each guess, score it against the demo's joint angles, drop the weak ones, copy the strong ones, average what's left
• Continuous speed instead of a few fixed rates, and one noisy reading can't make it skip a whole rep
• A hold mode for poses, plus recovery when the learner gets lost; built on the Gesture Variation Follower (Caramiaux et al., 2014)

MyFitnessTech Live The official Fitness Tech app

A fitness app built with Flutter and Firebase, on iOS and Android. Workouts, nutrition, sleep, hydration and biometrics roll up into one profile, with an AI coaching layer, social features, and a device layer that pairs the club's own hardware straight into the app. I built its framework and infrastructure, maintain it, and shipped it to the App Store and Google Play.

iOS Android Flutter Firebase BLE

App Store → Google Play →

💧 SipSync Prototype Smart bottle — Fitness Tech hardware

A water bottle that weighs every sip. A load cell reads the bottle and an IMU catches the tilt, but a sip only counts once the water settles and the weight actually drops — so bumps and set-downs don't register. A XIAO ESP32-C3 streams it over BLE into MyFitnessTech as live hydration: sips, ounces drank, ounces left.

ESP32-C3 BLE Altium Designer PlatformIO HX711 Load Cell MPU-6050 NeoPixel 3D Printing

• ~12 h on a 400 mAh LiPo after a firmware power pass
• Full custom PCB design in Altium Designer, schematic through layout
• TP4056 LiPo charging with boost regulation, plus Schottky isolation against USB VBUS contention
• HX711 load-cell front end and MPU-6050 IMU over I²C

⏱️ BioBand Protoboard Two-part wrist wearable — Fitness Tech hardware

A two-part wrist wearable. One module does motion sensing with an IMU; the other measures heart rate and temperature. Each works on its own, and together they add rep counting and boxing-style movement matching.

ESP32 IMU Heart Rate Temperature I²C Sensors BLE

Education

Skills & Tools

Fitness Tech @ UW

Bridging Fitness & Technology

Fitness Tech is a student-led Engineering Student Organization (ESO) at UW that builds wearable technology to streamline athletic training metrics. I founded the club in October 2025, and it has grown to 40+ members with hundreds of applicants. Our faculty advisor is Prof. Sep Makhsous (ECE).

• 40+ Members
• 6 Projects
• 4 Teams
• 2 App Stores

I run it end to end: I built MyFitnessTech's framework and infrastructure and got it onto both app stores, and I lead the business side — fundraising, sponsorships, and events, with ~$3.5K raised so far.

What we're building MyFitnessTech, SipSync, BioBand, and three more 6

• MyFitnessTech Live

  A Flutter app, live on iOS and Android, that brings workouts, nutrition, sleep, hydration and biometrics into one profile, with an AI coaching layer.

• SipSync PCB in design

  A smart water bottle attachment that logs sips and sets adaptive hydration targets.

• BioBand Protoboard

  A two-part wrist wearable: IMU motion sensing on one part, heart rate and temperature on the other. Together they add rep counting and boxing-style movement matching.

• Boxing Glove Exploring

  A sensor glove for punch tracking, testing motion sensing and RFID.

• Coach Dashboard Discovery

  A team-level view of effort, training load, readiness and hydration for coaches.

• Project Beacon Starter

  New members learn the basics by building a live-data showcase display for tabling and demos.

Device pipeline

1. Breadboard
2. Protoboard
3. Custom PCB
4. Enclosure
5. Validation

Teams

• Research
• Hardware Development
• Software & AI
• Business & Marketing

Website Instagram Discord

Fitness Journey

UW Boxing Team

Pride. Poise. Team. Family.

• 🥊 Boxing Sparring, footwork, bag work
• 🏋️ Strength Powerlifting + hypertrophy
• 🏃 Conditioning HIIT, sprints, endurance