Yoooo I'm Rexan, a 17-year-old high schooler & entrepreneur from Hong Kong who can build blockchain, iOS, and full-stack web apps.

Created text-behind-image, a free design tool with 100K users and #1 on Product Hunt

Created my startup videofast.gg - #2 Product of the Day on Product Hunt, 1.6k users

Won international hackathons, eg. Apple Swift Student Challenge, ETHGlobal Online + more

7k followers on X/Twitter

Ambassador @ Thirdweb

Senior @ Hong Kong International School

Huge football fan (🇾🇪 #GGMU)

Currently building

Text Behind Image logo

Text Behind Image

Since September 2024

Create text-behind-image designs easily

Creating stunning text-behind-image designs are difficult and there's not many easy-to-use tools online that helps you do that. So I built my own free tool, in 3 hours with AI tools such as cursor.sh, that helps you create these stunning text-behind-image designs easily on your images. Since launching, the tool has gotten 100K users, 3 million views on X/Twitter, #1 Product of the Day on Product Hunt, and notable shoutouts from people like Ryan Hoover, the founder of Product Hunt.

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Free tool
Design tool
VideoFast (videofast.gg) logo

VideoFast (videofast.gg)

Since Janurary 2024

A super easy to use online video editor

I've started building VideoFast since the beginning of 2024, while working on schoolwork at the same time. From iterating and constantly improving the design and the usability of the video editor, it has evolved into the easiest video editor that you will ever use. Currently, VideoFast has got the #2 Product of the Day on Product Hunt and has over 500 regular users using the editor.

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Startup
Remotion
Video editing tool

Awards

Hong Kong Blockchain Olympiad logo

Gold medalist award

The HKBCOL is a blockchain solution design competition where teams from all secondary schools from Hong Kong compete to pitch and present their blockchain solution to industry leading judges. I was awarded the gold medal (first place) for my project Proof of Workout Protocol and selected to represent Hong Kong at the International Blockchain Olympiad in the Netherlands.

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Olympiad
In Person
100+ teams
ETHGlobal Online logo

Top 10 Finalistis (Winning team) + Mantle Best UX Award

ETHOnline is a three week long online hackathon with over $200,000 USD in prizes as well as a series of curated summits, celebrating some of the most significant happenings & learnings from the past 12 months in web3. The hackathon is focused on building Ethereum based applications with different bounties' tools and technologies. I built Koinu, an npm library that allows developers to include a cross chain experience within their dapps. This project was selected as a finalist project, along with 9 other finalist projects, out of 500 projects. Being the only under-18 to win the competition, and competiting against the best and most hardcore developers in the Web3 space, out of 515 projects, I learnt a lot more about Web3 and blockchain development during the course of the hackathon and it encouraged me to build blockchain applications more : the fact that I could compete, as a 15 year old, at the time, against the top developers of the Web3 space, and win, I am looking forward to build more applications for everyday users of Web3

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Hackathon
Online
500+ Teams
Not Another Virtual Hackathon (NAVH) by Cosensys logo

Winner of the IYKYK Linea Edition

Consensys, one of the biggest blockchain companies, hosted NAVH: Not Another Virtual Hackathon beginning July 6th, 2023, for technical and non-technical builders to bring their skills to the table. Builders from anywhere in the world can join to compete for over $115,500 in bounties, using Cosensys products to build something. I built Proof of Workout Protocol : a dApp on Linea (a blockchain developed by leading blockchain company Cosensys) designed to motivate and reward physical fitness through a gamified system of quests and token-based incentive.

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Hackathon
Online
70+ Projects

Developer DAO, the biggest Web3 Developer Organisation, and Mina Protocol, a zero knowledge based blockchain with a market cap of $800 million USD, ran a week-long, remote hackathon with ~ $10,000 in prizes to be won in USDC, Mina Token and CODE. The hackathon is focused on building zero-knowledge applications on Mina Protocol with SnarkyJS. I built a privacy-focused decentralized zkApp that aims to enable anonymous and secure protests where participants can join and support various causes while preserving their privacy. This hackathon was the most hardcore hackathon I've participated in : joining the hackathon, knowing very little about zero-knowledge (zk) technology, let alone building zk technology. Throughout the process, I had to dive deep and learn all these new concepts while building my zkApp. In the end, my project won first place in the hackathon, out of 40 other projects, and this victory provoked me to go further deeper into this tough concept of zero knowledge technology.

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Hackathon
Online
40+ Projects
ETHGlobal Waterloo logo

Best Use of Metamask SDK

ETHGlobal Waterloo is a 24hr long In person hackathon at Waterloo, CA, with over $200,000 USD in prizes as well as a series of curated summits, celebrating some of the most significant happenings & learnings from the past 12 months in web3. The hackathon is focused on building Ethereum based applications with different bounties' tools and technologies. The entire hackathon was an amazing learning process to me, especially for learning more about blockchain development - throughout the entire hackathon, I had many chances to talk face to face with top leaders and developers in the Web3 space - all these people, all the other teams, together in one big room in the town of Waterloo, building and sharing a passion together. An even bigger impact personally was being able to travel all the way from where I live, Hong Kong, all the way to Waterloo, Ontario, Canada, and hack along with two University of Waterloo students, herby gaining exposure to university life and working as a development team. We built a Video-sharing platform powered by ERC-6551 tokenbound-accounts, empowering the content creator economy through advertisers' staking in smart contracts.

Hackathon
In Person
200+ teams
Apple Swift Student Challenge logo

WWDC23 Scholar

The Swift Student Challenge at WWDC (Worldwide Developers Conference) is an annual competition organized by Apple to celebrate the ingenuity and expertise of student developers using Swift. Apple picks around 300 applications out of a pool of more than 10,000+ applicants to win, and I was one of the 300 applicants to win the challenge. I built an iOS app/game that challenges users to find an image of a random word generated by the app in their photo album, then used machine learning models to verify that the image being selected matches the random word.

Hackathon
Online
13500+ Submissions

Notable Shoutouts

Ryan Hoover, founder of Product Hunt:

Steven Tey, former developer advocate at Vercel:

Education

Hong Kong International School logo

Hong Kong International School

2020 - 2025

High school, currently a senior

I am a member of the Table Tennis Team and a leader of the Student Digital Leadership Team. Academically, I have been in the honour roll every year at HKIS, given to students with a yearly GPA of 3.5-3.99. I am also a teaching assistant for Advanced Computer Science Studio, the highest CS class in the school, helping the teacher prepare resources and provide help in class for students
Christian Alliance International School logo

Christian Alliance International School

2013 - 2020

Primary school

Acheived academic honours with distinction for every year since grade 4 to grade 7, given to students with a yearly grade over 90%.

Work Experience

Thirdweb logo

Thirdweb

2023 - Present

Thirdweb Ambassador

A Thirdweb Ambassador is someone that Thirdweb, the leading blockchain infrastrcure company, has selected to be ambassadors for Thirdweb. As a Thirdweb ambassador, I share knowledge on new groundbreaking web3 tools, represent Thirdweb in networking events, create content for Thirdweb, and get rewarded with benefits exclusive to ambassadors
Remote
City University of Hong Kong logo

Speaker and Mentor for the CityU-EE Gifted Education Programme on Cryptography, Blockchain, and Fintech

The “Coding, Cryptography and FinTech (CCF) Skills Education for Gifted Students” programm is a programm aimed for the most gifted high school students around Hong Kong, teaching them about coding, cryptography, and fintech. As a speaker and a mentor, I hosted workshops and lectures for the program to teach the students about these topics
IEEE Blockchain Hong Kong logo

Mentor and Volunteer

The IEEE Hong Kong Blockchain Local Group is the official blockchain group for Hong Kong under the Institute of Electrical and Electronics Engineers (IEEE)'s Hong Kong Section. The IEEE HK Blockchain Local Group hosted a Web3 hackathon, targeted towards university students, to build Web3 applications and compete for prizes up to $100K HKD. Over 100 teams joined, from 5 different universities across Hong Kong. As a mentor, I was in charge of giving guidances and tips to the teams participating about the hackathon, as well as host mini workshops and create technical Youtube tutorials about blockchain development. In addition, as a volunteer, I was in charge of setting up the venue and more, ensuring that the hackathon day in person was a smooth experience, as well as build the website for the hackathon
Arta Tech Fin Corporation Limited logo

Summer Intern

During the summer of 2022, I interned at Arta Tech Fin as a blockchain research intern. My responsibilities included conducting research on blockchain technologies and their potential applications in the financial industry. At Arta Tech Fin, I had the chance to work with experienced professionals in the financial industry and learn about the latest trends and developments in blockchain technology. I gained valuable insights into how blockchain can be used to solve problems and improve processes in the financial sector, and was able to contribute to the company's research efforts.
Internship
Hybrid
CryptoBLK Limited logo

CryptoBLK Limited

6/2022 - 8/2022

Summer Intern

At Cryptoblk, I had the opportunity to work with a talented team of developers and learn about the latest technologies and trends in the blockchain industry. I gained valuable experience in smart contract development and blockchain application development, and was able to contribute to a variety of projects that helped to improve the company's products and services. I also worked with the business development team and IEEE HK Blockchain to host the Web3 Dev Hackathon 2022
Internship
Hybrid

Music

Grade 8 Piano Performance (Pass)

2024
Issued by The Associated Board of the Royal Schools of Music

Grade 7 Piano Performance (Distinction)

2023
Issued by The Associated Board of the Royal Schools of Music