Tepy Thai
Frontend & Rust Engineer building high-performance trading infrastructure.
From frontend to low-latency systems. Currently focused on Solana DeFi infrastructure and performance optimization.
About
Originally from Cambodia. Based in Tokyo, Japan for over 10 years. Fluent in English and Japanese.
My journey: Math Olympiad Gold Medalist (1st nationwide in Cambodia) → Computer Science at Toyohashi University of Technology → Frontend Engineering → Systems Programming.
Currently building a Solana arbitrage bot in Rust while working as a Frontend Engineer at PR TIMES. Actively seeking Frontend or Rust engineering positions in Fintech, Blockchain, HFT, or Solana infrastructure.
Featured Project
Solana Arbitrage Bot
Low-latency Rust system that detects and executes arbitrage across Solana DEXes. Built for streaming data ingestion, graph-based detection, and MEV-aware execution.
Architecture
Focus Areas
- • Low-latency streaming ingestion with zero-copy parsing
- • Lock-free concurrency on the hot path
- • DEX-agnostic architecture behind a common quoter interface
- • Pre-flight simulation and full observability
Experience
Frontend Engineer
2021 – PresentPR TIMES, Inc., Tokyo
Japan's largest press release distribution platform. Built a production WYSIWYG editor from scratch, led modernization from jQuery/PHP to React/TypeScript, achieved 8% beta adoption with zero downtime migration.
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学生時代に個人開発でWYSIWYGエディタライブラリーを利用したことがあったことで、PR TIMESに入社してからエディタ改修にずっと興味を持っていました。そのきっかけで2021年10月頃、一人でエディタリプレイスのプロジェクトを立ち上げました。経験が浅い新卒一年目ということもあり、最初はこのプロジェクトを数カ月で完成できると思っていました。しかし、耐久性のある新しいエディタライブラリーの選定をはじめ、既存エディタで配信されたプレスリリースのコンテンツと互換性を持たせたり、新エディタのUIをゼロからReactに書き直したりする必要があり、1年半ほど時間がかかりました。途中で新しいメンバーがジョインしてくれたおかげで、今ようやく無事に「PR TIMES」プレスリリースのエディタがリリースできて大変嬉しく思っています。このリリースで長い間リクエストされていたアンドゥ/リドゥ機能もできるようになるので、ユーザー体験の様子が変化するのを楽しみにしています。また、今回のリリースにとどまらず、PR TIMESの「行動者発の情報が、人の心を揺さぶる時代へ」というミッションを実現できるようなより良いエディタ機能を今後も続けてリリースしていきたいと思っています。是非新エディタをお試しください。
Engineering Internships
2019 – 2020Wantedly (React/GraphQL/TypeScript) and Uzabase SPEEDA (Full-stack Agile development).
Skills
Frontend
Languages
DeFi
CEX
Blockchain
Systems & Performance (Learning)
Currently Learning
- • "Rust Atomics and Locks" by Mara Bos
- • "Systems Performance" by Brendan Gregg
- • "Designing Data-Intensive Applications" by Martin Kleppmann
- • Web Performance optimization
- • Distributed systems (CAP theorem, consensus algorithms)
- • OS development (os.phil-opp.com)
- • HFT study notes →
Other Projects
View all →PR TIMES Rich Text Editor
Production WYSIWYG editor powering Japan's largest press release platform
អំណាន (Omnan)
Bilingual content-publishing platform for the Cambodian community, deployed on Cloudflare's edge
52 Weeks to HFT Engineer
A structured 52-week journey from frontend engineer to low-latency trading infrastructure, building a full exchange from scratch in Rust
LeetCode Roadmap
A 20-week structured journey from foundations to interview-ready — with annotated Rust solutions and deep walkthroughs.
Writing
View all →Contact
Open to Frontend or Rust engineering opportunities in Fintech, Blockchain, HFT, or Solana infrastructure.