Tepy Thai

Frontend & Rust Engineer · Tokyo, Japan

Tokyo, Japan

thaitepy@gmail.comGitHubLinkedIn

Summary

Frontend & Rust Engineer building high-performance trading infrastructure with 4+ years of professional experience. Bridging frontend engineering and low-latency systems programming, currently focused on Solana DeFi infrastructure and performance optimization. Actively seeking Frontend or Rust engineering positions in Fintech, Blockchain, HFT, or Solana infrastructure. 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

Production Rust arbitrage system on Solana — low-latency detection and execution.

  • • Low-latency streaming ingestion with zero-copy parsing
  • • Graph-based opportunity detection over live DEX state
  • • MEV-aware execution path with pre-flight simulation
  • • Lock-free concurrency on the hot path; full metrics and distributed tracing
RustTokioSolanagRPCLock-free concurrency
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
អំណាន (Omnan)

Bilingual content-publishing platform for the Cambodian community — live at omnan.com.

  • • TanStack Start on Cloudflare Workers with D1 (SQLite) + Drizzle ORM, R2 for media
  • • Rich-text publishing (TipTap), social features (follow, threaded comments, bookmarks)
  • • OAuth via Better-Auth (Facebook/Google), rate limiting, content moderation
TanStack StartCloudflare WorkersD1DrizzleTipTapTypeScript

Skills

Frontend

React / Next.jsTipTap editorsTanStack QueryRecoil / JotaiCore Web Vitals

Languages

RustTypeScriptPythonGo (Learning)

DeFi

AMM designBorrow / Lending protocolsLiquidity provisioningDEX aggregation

CEX

Algorithmic tradingOrder book mechanicsMarket making

Blockchain

Solana (gRPC streaming, DEX integrations, MEV-aware execution)Ethereum (Solidity)Starknet (Cairo)

Systems & Performance (Learning)

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

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.