Tepy Thai

Rust Engineer · Tokyo, Japan

Tokyo, Japan

thaitepy@gmail.comGitHubLinkedIn

Summary

Rust Engineer building high-performance trading infrastructure with 4+ years of professional experience. Transitioned from frontend engineering to low-latency systems programming, currently focused on Solana DeFi infrastructure and performance optimization. Originally from Cambodia, based in Tokyo for over 10 years.

Experience

Frontend Engineer

2021 – Present

PR TIMES, Inc., Tokyo, Japan

Japan's largest press release distribution platform.

  • • Built a production WYSIWYG editor from scratch using React and TipTap with custom extensions
  • • Led modernization of legacy jQuery/PHP codebase to React/TypeScript
  • • Launched beta editor achieving 8% user adoption with zero downtime migration
  • • Ensured backward compatibility with 1M+ press release database
  • • Optimized Core Web Vitals and implemented performance monitoring
  • • Led a team of 3 engineers on the editor modernization project
ReactTypeScriptTipTapTanStack QueryJotaiVite

Engineering Intern

2020

Wantedly, Inc., Tokyo, Japan

Social recruiting platform connecting companies with talent.

  • • Developed features using React, GraphQL, and TypeScript
  • • Contributed to frontend architecture improvements
ReactGraphQLTypeScript

Engineering Intern

2019

Uzabase (SPEEDA), Tokyo, Japan

Business intelligence platform for economic information.

  • • Full-stack development in an Agile team environment
  • • Participated in sprint planning, code reviews, and pair programming

Key Projects

Solana Arbitrage Bot2023 – Present

A production trading system that detects and executes arbitrage opportunities across Solana DEXes using Rust.

  • • Real-time data ingestion via Yellowstone Geyser gRPC streaming
  • • Graph-based opportunity detection using Bellman-Ford negative cycle detection
  • • Integration with multiple CLMM protocols (Orca, Raydium, Meteora)
  • • Zero-allocation hot paths for latency-critical execution
  • • Lock-free data structures with careful memory ordering
RustgRPCWebSocketPostgreSQLRedis
PR TIMES Rich Text Editor

Production WYSIWYG editor powering Japan's largest press release platform.

  • • Built from scratch with React + TipTap and custom extensions
  • • Backward compatible with 1M+ existing press releases
  • • 8% beta adoption with zero downtime migration
ReactTypeScriptTipTapTanStack Query
ចំណេះ (Chamneh)

Cambodian knowledge-sharing platform for accessible education.

  • • Medium-like platform for sharing knowledge in the Khmer language
  • • Open source, non-profit initiative to bridge the education gap in Cambodia
Next.jsTipTapPostgreSQLTypeScript

Skills

Languages

RustTypeScriptPythonGoC

Systems & Performance

Low-latency optimizationLock-free data structuresio_uring / SIMDProfiling (Brendan Gregg)

Blockchain / Solana

Yellowstone GeysergRPC pipelinesDEX protocols (CLMM)Transaction building

Frontend

React / Next.jsTipTap editorsTanStack QueryCore Web Vitals

Education

B.E. in Computer Science

2017 – 2021

Toyohashi University of Technology

  • • MEXT (Japanese Government) Scholarship recipient

Languages

English — FluentJapanese — Fluent (Business)Khmer — Native

Achievements

Math Olympiad Gold Medal

1st place nationwide in Cambodia. Represented Cambodia in international mathematics competitions.