Fred Kyung-jin Rezeau

Fred Kyung-jin Rezeau

Founder and developer at LITEMINT and XBID LABS. Former Tech Lead at BGC Group in London and developer at LCL Bank in Paris.
 
오경진 吳景振 #HalfKorean, born in Itaewon, Seoul. Studied French literature and Latin at the University of Angers in France before finding the poetry of code.
Founder and developer at LITEMINT and XBID LABS. C++ is my native language. I never stopped exploring beyond it.
 
I started out in tech as a C++ developer at LCL Bank in Paris, moved to London to work on smartcard systems for the UK government’s National Programme for IT, and later served as Tech Lead at BGC Group in London with occasional projects in New York. After a few years in finance, I left to make games full time. I released 14 titles, earned an Honorable Mention at the 2014 Linux & Samsung Tizen App Challenge, and co-founded the Israel-based studio Massive Games before creating LITEMINT in 2018 and XBID LABS more recently.
 
My journey into programming was atypical. I studied French literature and Latin at the University of Angers in France before teaching myself C++ after buying my first computer (still the best investment I ever made). For me, coding has always been a form of writing; a way to express meaning.
 
I was born in Korea and live here now, after years spent across several countries. Baudelaire’s Le Voyage is among my favorite poems. He wrote that true voyagers leave simply to leave; a paradoxical tautology I’ve always loved—in C++ poetry: std::invoke([] { std::exit(0); return true; })
 
Outside of work, I paint, I game, and I keep learning. Martial arts have been part of my life since childhood, with Taekwondo grounding me the most. Learn something, build something, Love above all, repeat.

Posts


Shipping the Wallet-First NFT Marketplace

We just shipped a major wallet-first redesign of the Litemint NFT Marketplace. This post covers what changed, why, and a bit of the tech under the hood.

Wallet-First

I was never fully satisfied with the accounts model on the Litemint marketplace. We built it for onboarding convenience (Google, Facebook, email…) but it always felt like a web2 compromise. So we rebuilt it.

January 20, 2026

Cyberbrawl: Expanding the Horizons of Litemint.io

Cyberbrawl, the sequel and rebranding of Litemint.io, is almost here, and it’s loaded with awesome new content and features that take the existing experience to a new level! Here’s a sneak peek at what’s on the horizon.

Seamless Transition for Existing Players

Since 2021, more than 155,000 player accounts have been created on Litemint.io, engaging in over 6 million battles! The game blockchain-related features are opt-in, enabling gameplay directly from mainstream gaming portals. While most players still hold their assets on our servers, there are over 3,200 trustlines to our game assets on the Stellar blockchain and 6% of our players have now linked a Stellar wallet to their profile.

July 26, 2024

Building Bridges For NFTs

We built an ERC-721 compliant, non-custodial and decentralized bridge to Ethereum allowing creators and collectors to use their NFTs, securely, as PFP (Picture for Proof or Profile Picture) with any Web3 service. Yes, that includes Twitter NFT profile picture, Web3 Avatars and more.

Fully Non-Custodial Bridge for Stellar NFTs

The bridge is 100% non-custodial so you, and only you, control your assets at any time. Even in the event of Litemint not being reachable, you can always destroy the bridge to recover your NFTs by signing and submitting a transaction on Stellar. Likewise, ownership revocation on Ethereum does not rely on a central entity and process (more on this below).

March 15, 2023

Anatomy of a Stellar-powered Auction on Litemint

This post breaks down the mechanics behind Litemint’s decentralized NFT auctions on Stellar.

We have just released the Auctions feature on Litemint! NFT owners on Litemint can now run live, time-limited auctions with reserve price to further engage with their potential buyers. Collections also accept a dynamic filter for your auctions.

Litemint Auction UI

Live auction on Litemint

Litemint auctions are fully decentralized, require no escrow, with full settlement on the Stellar DEX. Let’s uncover the tools and dissect how it works.

September 19, 2022

NFT Ownership During The Apocalypse

All you need is basic math to prove NFT ownership when everything else is down.

NFT Ownership During The Apocalypse

Introduction

I recently shared NFT minting guidelines to help future-proof NFT ownership by using decentralized storage for the art and by creating a circular reference to the asset on the blockchain (i.e. Stellar in our case) using a metadata file. These best practices eventually became the foundation for SEP-0039.

In this short article, we will take a doomsday scenario to illustrate the importance of following these guidelines.

November 14, 2021

NFT on Stellar – Solution to Pricing Limitations on the SDEX

This post explains the Stellar DEX pricing limitation for indivisible tokens and the solution we use on the Litemint NFT marketplace.

Issuing Indivisible Tokens on Stellar

The smallest amount for an asset issued on Stellar is called a stroop and is equal to one ten-millionth or 0.0000001. Therefore, we can issue 1 stroop of an asset to ensure that it is indivisible (e.g. as part of the requirements for NFTs).

Stellar DEX Price Limit

However, such small amounts may cause issues on the Stellar DEX because Stellar Core internally uses INT32 (see Stellar-ledger-entries.x) for the fractional representation of prices and the INT32 type can only store values between -2,147,483,648 to 2,147,483,647 (inclusive).