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Hi, I’m Jianchun Zhang, a software developer and operations engineer based in Beijing with 20 years of experience focusing on server-side and gameplay programming. I’ve led small tech teams, shipped scalable back-end systems, and built frameworks and tools to improve performance and reliability. I enjoy turning complex problems into robust, maintainable solutions and collaborating with cross-functional teams to deliver high-impact software. I’m proficient in Golang, Node.js, TypeScript, JavaScript, C/C++, and a broad cloud/tooling stack (AWS, Docker, Kubernetes). I thrive on building scalable architectures, refactoring code for better performance, and delivering products that customers love.…Hi, I’m Jianchun Zhang, a software developer and operations engineer based in Beijing with 20 years of experience focusing on server-side and gameplay programming. I’ve led small tech teams, shipped scalable back-end systems, and built frameworks and tools to improve performance and reliability. I enjoy turning complex problems into robust, maintainable solutions and collaborating with cross-functional teams to deliver high-impact software. I’m proficient in Golang, Node.js, TypeScript, JavaScript, C/C++, and a broad cloud/tooling stack (AWS, Docker, Kubernetes). I thrive on building scalable architectures, refactoring code for better performance, and delivering products that customers love.

Jianchun Zhang

Game Developer, Full Stack Developer, Web Developer, +2

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Hi, I’m Jianchun Zhang, a software developer and operations engineer based in Beijing with 20 years of experience focusing on server-side and gameplay programming. I’ve led small tech teams, shipped scalable back-end systems, and built frameworks and tools to improve performance and reliability. I enjoy turning complex problems into robust, maintainable solutions and collaborating with cross-functional teams to deliver high-impact software. I’m proficient in Golang, Node.js, TypeScript, JavaScript, C/C++, and a broad cloud/tooling stack (AWS, Docker, Kubernetes). I thrive on building scalable architectures, refactoring code for better performance, and delivering products that customers love.…Hi, I’m Jianchun Zhang, a software developer and operations engineer based in Beijing with 20 years of experience focusing on server-side and gameplay programming. I’ve led small tech teams, shipped scalable back-end systems, and built frameworks and tools to improve performance and reliability. I enjoy turning complex problems into robust, maintainable solutions and collaborating with cross-functional teams to deliver high-impact software. I’m proficient in Golang, Node.js, TypeScript, JavaScript, C/C++, and a broad cloud/tooling stack (AWS, Docker, Kubernetes). I thrive on building scalable architectures, refactoring code for better performance, and delivering products that customers love.

Available to hire

Hi, I’m Jianchun Zhang, a software developer and operations engineer based in Beijing with 20 years of experience focusing on server-side and gameplay programming. I’ve led small tech teams, shipped scalable back-end systems, and built frameworks and tools to improve performance and reliability. I enjoy turning complex problems into robust, maintainable solutions and collaborating with cross-functional teams to deliver high-impact software.

I’m proficient in Golang, Node.js, TypeScript, JavaScript, C/C++, and a broad cloud/tooling stack (AWS, Docker, Kubernetes). I thrive on building scalable architectures, refactoring code for better performance, and delivering products that customers love.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Beginner

Beginner

Work Experience

Freelancer at Freelancer

June 1, 2024 - October 28, 2025

Remote development and maintenance of a car booking system for U.S. travel clients; built a full-stack fleet information management framework; delivered a scalable NestJS backend and React-based customer booking system; implemented admin management; built an AWS production environment with Terraform; front-end deployment to Cloudflare; created a match-3 game server; implemented automatic service monitoring; migrated WordPress to AWS Lightsail; integrated car booking with WordPress; built a log management iOS app and a Go-based log management server using Gin/Gorm.

Senior Software Engineer at Asia Innovations Group Limited

January 1, 2024 - January 1, 2024

Migrated all game servers from AWS to Tencent Cloud without incidents; launched 30+ HTML5 single/multiplayer games; built a scalable game lobby supporting up to 1,000,000 concurrent users; transitioned to TypeScript with Jest; dockerized services into Kubernetes; implemented Consul and Fabio-based service registration/discovery; sharded MongoDB for 10,000,000 users; developed WebSocket-based restart solution; resolved Redis issues under heavy concurrency; built Giftomon on Ethereum (ERC721 GTOM); admin access via AWS API Gateway and Lambda; integrated Google BigQuery; built a unified Graylog-based log system; created a robot player system for low-activity games.

Senior Backend Engineer at Kabam Inc.

February 1, 2017 - February 1, 2017

Developed core game services including user management, payment, inventory, equipment, combat, skills, talents, buffs; created stress testing tools to optimize server performance; optimized databases and code to improve response times; built Lobby, Login, and Room services in C++ game servers; optimized C++ with Google perftools and fixed memory leaks; implemented Robot Player System for the Blast Zone game.

Senior Software Engineer at StreamWIDE Inc

May 1, 2013 - May 1, 2013

Led team to complete a load balancer for voicemail service (SIP/HTTP) capable of handling 10,000,000 users; customized voicemail systems for various organizations; reconstructed voicemail statistics system; continuously optimized MySQL databases.

Advanced Software Engineer at Fortinet

January 1, 2008 - January 1, 2008

Created a mobile backup system based on SyncML; maintained Fortimanager's virus library delivery system; created a content download system for Symbian S60.

Software Engineer at JF Computer Systems CO. LTD

May 1, 2006 - May 1, 2006

Developed clinical information system client (MFC) and server on Linux (C++); built a management tool for the clinical information system (C# and Perl); developed real-time video system for kindergartens and daily information system; built a version management system for AutoCAD.