Go · C++ · AWS · Blockchain | 10+ Years | Yokohama, Japan
Backend engineer with a decade of delivery across online gaming, retail AI, blockchain, and enterprise IAM. I specialize in entering unfamiliar domains fast and shipping production-grade, highly scalable systems from scratch.
| 10+ yrs | 50K | 10M | 2 TB |
|---|---|---|---|
| Experience | Concurrent users / node | Registered players | Daily data processed |
Languages
Cloud & Infrastructure
Databases
Domains
Backend Engineer — Kyouka Co., Ltd., Yokohama · Jul 2024 – Present
Shimizu Corp / Saviynt IAM Sep 2025 – Present
Designed and owned all data-processing code. Built the full AWS pipeline from scratch — CDK (IaC), Step Functions state machines, a Lambda per processing stage — and delivered requirements → coding → testing → deploy solo.
Python TypeScript AWS CDK Step Functions Lambda Saviynt
7-Eleven Japan AI Ordering System Jul 2024 – Aug 2025
Continued development of the Python data pipelines powering a nationwide AI supply-chain platform deployed across 21,000+ stores.
Python VBA Bash
Lead Game Server Engineer — Hangzhou Qingyu Network Technology · Jul 2023 – Feb 2024
CUCKOO Blockchain Game Platform
Built the Go backend (REST API, business logic, DB design, microservice integration) and designed an on-chain / off-chain hybrid settlement model: high-frequency trades batched off-chain for throughput; critical operations settled on-chain via smart contracts. Owned all server-side blockchain interaction.
Go Node.js Ethereum Redis MongoDB MySQL
Fuss of Three Kingdoms
Client-computed / server-validated combat: Lua server issues random seeds → client runs the battle simulation → Node.js validator replays it server-side to detect cheating.
Go Lua (skynet) Node.js
Lead Game Server Engineer — Hangzhou Quweiyou Network Technology · Sep 2021 – Apr 2023
HeHe Restaurant (Casual Online Game)
Designed a 4-layer server architecture: Gate (load balancing, DDoS blacklisting) → Game (horizontally scalable logic) → Global (cross-server auth, leaderboards, GM relay) → Platform (SDK docking, ops tools). Stress-tested to 50K concurrent users / node, 10M registered players. Built a Redis storage layer that meaningfully reduced login latency.
Go Redis Bash
IT Engineer — WISDOM JAPAN, Yokohama · Mar 2018 – Jun 2021
7-Eleven Japan AI Ordering System
Core data-processing module for 2+ TB of daily sales data from 21,000 stores across Japan; later rolled out globally.
Python pandas pytest
Nikkei QUICK Stock Page Migration
Self-taught React from scratch and delivered the majority of the codebase in 3 months — the client's original estimate was 1 year.
React Node.js
C++ Game Server Engineer — 7K7K, Beijing · Jul 2014 – Jun 2017
Starlight Legend (MMORPG) — gameplay video ↗
One of three engineers who built this MMORPG from the ground up — ¥20M average monthly revenue across China, Korea, Taiwan, Thailand, and Singapore. Designed the cross-server Global Service (shared-memory IPC). Owned most gameplay systems: event engine (hot-reload, refactored from one event per type / day-precision to multiple concurrent events at second-precision), skills, guilds, arena, NPC AI, shop, and leaderboards.
C++ MySQL Bash
zinx — Core Contributor · PR #231: Rewrote the load balancer for high-concurrency game scenarios, achieving fair task distribution under load. ★ 7.7k 1.1k forks
AIGC-RPG-DEMO · Text-based RPG powered by generative AI, built to run on Google Colab. An experiment in LLM-driven game narrative.
Real system designs from production. Click any diagram to open the full interactive version.
Blockchain Game Platform — Hybrid Settlement Architecture Decoupled Game / Platform services · Custodial wallet management · On-chain NFT settlement | Go · Ethereum ↗ View interactive diagram |
High-Concurrency Multiplayer Server Design Dynamic load balancing · Horizontally scalable game nodes · Anti-cheat validation · Cross-server coordination ↗ View interactive diagram |
Horizontally Scalable Casual Game Server 4-Tier Architecture: Gate · Logic · Global · Platform | 50K concurrent users / node | Go · Redis |
MMORPG Distributed Scene-Server Architecture Multi-zone scene servers · Cross-server Global Service (IPC) · Per-zone DB sharding | C++ · MySQL |
- 🎓 B.Eng. Electronic Information Technology & Instrumentation — Hangzhou Dianzi University
2009–2013 - 📜 Coursera Machine Learning & Deep Learning — certificate ↗
- 🏆 Outstanding Employee Award — 7K7K
Jan 2017 - 🥈 2nd Prize, Zhejiang Provincial University Physics Competition
2011
🇨🇳 Chinese — Native | 🇯🇵 Japanese — JLPT N1 (5+ years in Japan) | 🇬🇧 English — CEFR B1, strong technical reading
