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Zhou K.
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Zhou K.

Full Stack Development | Game Reverse and Security Engineer

[ 20 Years of Game Security And Reverse Engineering Experience ] -Reverse analysis of Windows Game -Protocol reverse engineering and penetration testing -Custom software development -Software feature expansion and patching -Software data/function extraction -Windows driver development Reverse Engineering and Low-Level Skills: *Proficient in IDA Pro, WinDbg, xdbg64/32, Ghidra *Windows kernel analysis and memory patching *Game data analysis, protocol vulnerability/penetration testing *Game data extraction *Game module function invocation *Software feature expansion/patching *Ring0 level memory read/write and memory page protection *Ring0 process hiding *Ring0 shellcode injection *Ring3 level DLL injection *PTE Hide *Unattach mem read/write *Traceless PE loading and execution *APC DLL injection Android Reverse Engineering and Low-Level Skills: *APATCH *Dobby SO level hook. *LSPOSED hook. *Firda Script *Smlai code modify. *ARM asm *APK file merge *APP patching Red Team Attacker Testing: *Game Anti-Cheat [ida/xdbg/driver/asm/c++/vmware/vt] *Game network protocol logic vulnerability testing [C/C++/ASM/DLL Injection] *Gaming network protocol penetration testing [C/C++/ASM/DLL Injection] *Developed proprietary tools using [Golang/Python] *DLL injection interface testing using [C/C++/ASM/DLL Injection] *XRay [web] *BurpSuite [web] Development Skills: *Driver development using [C/Assembly] *Android development with [Java/Flutter] *Server/backend system development in [PHP/Golang] *Application development in [C/C++/C#/Golang/Lua/Rust] *Auxiliary scripting in [JavaScript/VBS] *Frontend web development with [Vue2/3/TypeScript/CSS] Databases: *MySQL, *SQLite *MariaDB *Access DB *SQLServer ------------------------*Full Stack Development*------------------------------ [ Over 10 years of experience in Windows reverse engineering and development ] - Windows desktop applications - Windows DLL development - Windows DLL/kernel injection - Windows kernel driver development (32/64-bit) - Windows kernel debugging - Cross-platform desktop application development using Tauri and Flutter - Static analysis and reverse engineering of applications/games - Network protocol analysis and penetration testing - Basic experience with Cocos, Unity, and UE5 game development - Sockets development * Programming Languages: C/C++, Rust, ASM (32/64-bit), Golang, C#, Lua, JavaScript, TypeScript, Python, Java,VB6 * Frameworks & Libraries: WTL, MFC, WPF, WDK, WinSDK, DirectX, DuiLib * Engines: Cocos2dx, LUAEngine, JsEngine, Unity, UE5 * Reverse Engineering Tools: IDA Pro, WinDbg, OllyDbg, WinHex, 010 Editor [ Over 3 years of experience in Android reverse engineering and development ] - Native Java App development - NDK SO development - Dobby native hook - Xposed/Lsposed module development - Static analysis and dynamic debugging - APK merging tool development - H5 game development * Programming Languages: C/C++, Java, JavaScript * Reverse Engineering Tools: Frida, IDA Pro, Ghidra, Jadx, JEB, ApkTool, 010 Editor * Frameworks & Libraries: Xposed/Lsposed, Egreat, ReactNative, ReactJS, NDK [ Over 3 years of web development experience ] Frontend Development: - Frameworks: ReactJS, Vue - Languages: TypeScript, CSS, HTML, JavaScript, Rust (WebAssembly) - Libraries: MUI/JOY UI, Tailwind, ElementUI, Layui Backend Development: - Frameworks: Actix-Web, GoFrame2, Spring Boot - Languages: Lua, Python, PHP, Golang, Rust, Java - Databases: PostgreSQL, MySQL/MariaDB

🇨🇳Zhangjiakou, China$50/hr100% JSS5.00 (6)Since Jan 2024

Earnings and projects

MRR
$11k

Last 6 months ÷ 6

World#949 / 412k
🇨🇳Country#8 / 2,007
Revenue, last 30 days
$14k

Last 6 months: $68k

World#624 / 412k
🇨🇳Country#4 / 2,007
Total earnings
$240k

Billed in all: $248k

World#11,469 / 412k
🇨🇳Country#52 / 2,007
Per project
$13k

$68k in the last 6 months

World#10,964 / 412k
🇨🇳Country#38 / 2,007
Projects, last 6 months
1
0% fixed100% hourly
World#128,092 / 412k
🇨🇳Country#730 / 2,007
Projects in all
18

Across 38 contracts

24% fixed76% hourly
World#143,608 / 412k
🇨🇳Country#676 / 2,007

Earnings, last 30 days

$248k+$14.5k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$230k$240k$250kOct 8Oct 23Nov 7

Skill rankings: #1 in 6 skills of 15

Rarest: top 0.12% in Game Testing, of 852. Ranked by MRR among everyone on Upwork with the skill.

  1. 1Game Testing852 freelancers · 🇨🇳 #1Top 0.12%
  2. 1Ethical Hacking320 freelancers · 🇨🇳 #1Top 0.31%
  3. 1Game Development Bug Fix269 freelancers · 🇨🇳 #1Top 0.37%
  4. 1Network Penetration Testing212 freelancers · 🇨🇳 #1Top 0.47%
  5. 1Internet Protocol Security21 freelancers · 🇨🇳 #1Top 5%
  6. 1Anti-Cheat Plugin2 freelancers · 🇨🇳 #1Top 50%
  7. 2Vulnerability Assessment519 freelancers · 🇨🇳 #1Top 0.39%
  8. 2Assembly Language129 freelancers · 🇨🇳 #1Top 2%