Hi 👋

I’m In Hei Lei, and I go by Joshua. I study mechanical engineering and finance at the University of Sydney. Alongside my studies, I’m building Breeze and Roomtemp°. You’ll find both here, along with a selection of my other projects.

Education

  • The University of Sydney

    Bachelor of Engineering Honours and Bachelor of Commerce

    Mechanical Engineering and Finance

    – (expected)

  • The Wharton School, University of Pennsylvania

    Exchange student

    –

Projects

Roomtemp°

Jun 2026–Present · Founder and creative director

  • Led a three-person team developing Lumi in 2025. Designed the two-part out-of-bed alarm’s enclosure in SolidWorks and built and tested 5–6 3D-printed prototypes.
  • Created CAD layouts for a lamp’s internal components, including its motor, circuit board, speakers and battery.
  • Designed the brand identity, product interfaces and storefront, and coordinated suppliers and marketing for Roomtemp’s physical products and curated MUYU figures.

Breeze

Oct 2025–Present · Founder and creative director

  • Built and released an iOS breathing and journaling app using React Native, Expo and Supabase.
  • Designed the app interface and visual identity, tested its core features, and created the website and short-form marketing content.
  • Recruited 10 beta users to test the app.

Instil

Dec 2025–Feb 2026

  • Co-founded an AI workshop studio.
  • Developed the studio’s brand positioning, visual identity, logo and colour system, and designed its website.

PostMyNote

Jul–Oct 2025 · Co-founder

  • Worked with a team that secured clients in basketball, wine and dentistry, created carousel posts and helped grow their Instagram accounts.
  • The team held client meetings and built the website and an automated carousel-generation system.

Website

NestModel

Jul–Oct 2025 · Co-founder

  • Co-founded an e-commerce business offering physical 3D floor-plan models to real estate businesses.
  • Designed the brand identity and client-facing materials.
  • Conducted door-to-door outreach in New York City and ran email, paid social media and short-form content campaigns.

Zenta Group

Jun–Aug 2024 · Software engineering intern

  • Built multi-agent chatbots with LangChain and OpenAI to automate conversational workflows.
  • Built responsive interfaces in Next.js, Framer and Spline and connected them to backend AI services.
  • Refined AI prompts to improve response quality and responsiveness.

Homeplus

2022–2023

  • Co-founded and launched a platform for booking services using Vue.js, Vite and Firebase.
  • Adapted the app for iOS and Android using Ionic.
  • Designed the brand identity and app interface, and coordinated material sourcing.

Piezoelectric tile research

2021–2022

  • Conducted epoxy resin experiments for piezoelectric tile research with the University of Macau.

English public speaking team

2021–2022

  • Represented the school at the Macau Youth English Speaking Contest.
  • Organised and promoted the annual English Day and fair.

Elderly home robot

2020–2022

  • Trained a fall-detection model in Python and built a human-following system for an autonomous care robot.
  • Integrated YOLO, ROS, SLAM and AMCL for recognition, localisation and indoor navigation.
  • Led the team to first place in the RoboCup@Home Education Online Challenge in 2020 (high school) and 2021 (university). The team also won awards at ISEF Macau, KSEF and CTM Macau.

Smart Ark

2019–2020

  • Led development of an autonomous flood-rescue boat with a graphical interface for route planning.
  • Implemented person detection, PID control and ultrasonic obstacle avoidance for real-time navigation.
  • The team won awards at China Adolescents Science & Technology Innovation Contest and the Beijing Science Fair.

HYPED Hyperloop design team

2018–2019

  • Built a ticket-booking system using JavaScript, PHP and MySQL.
  • Worked with 14 other students from different schools to produce a hyperloop MVP and project proposal.

ROV and AUV team

2018–2019

  • Built an underwater shape-recognition system using OpenCV.
  • Designed a PID controller in C++ for an autonomous underwater vehicle.

FTC robotics

2017–2019

  • Led a 12-person team across software, mechanical design and communications, coordinating tasks and timelines.
  • Designed robot components in CAD and fabricated parts using 3D printing, laser cutting and lathe machining.
  • Organised STEM outreach with local schools and introduced younger students to robotics competitions.

Solar flare research

2017–2018

  • Analysed NASA MESSENGER solar-flare data with Macau University of Science and Technology.
  • Used CHIANTI spectral analysis to estimate elemental abundances from more than 500 observed solar flares.

Interests

  • Drawing
  • Cooking
  • Tennis