Zhu W.

19+ YEARS OF ENGINEERING EXCELLENCE & STRATEGIC CHINA MARKET ENTRY I am a Senior Software Architect and OSWE (Offensive Security Web Expert) certified professional. I specialize in building high-performance systems, rescuing legacy codebases, and helping global enterprises navigate the technical and regulatory complexities of the China market. WHY CLIENTS CHOOSE MY SERVICES: The China Bridge: Based in Shanghai. I solve the "Great Firewall" issues—from ICP filings and Alibaba Cloud (Aliyun) CN2 routing to WeChat/Alipay ecosystem integration. Security-First Architecture: As an OSWE holder, I don't just write code; I build fortresses. I specialize in secure API design and VAPT (Vulnerability Assessment and Penetration Testing). Legacy PHP Rescue: 19+ years with LAMP. I am the specialist for maintaining, securing, and refactoring mission-critical legacy PHP (5.x/7.x) systems. Modern Scalability: Expert in Golang microservices and high-concurrency data processing using ClickHouse and Elasticsearch. CORE SERVICES CHINA LOCALIZATION & COMPLIANCE Network & Performance: China Website Availability checks, Premium CDN (Global to China) configuration, and GeoDNS routing. Ecosystem Development: WeChat Mini-Program/App development, WeChat Pay, and Alipay integration. Regulatory Support: ICP Filing guidance, Chinese Law consultations, and localized Contract Preparation (NNN/NDA). BACKEND ENGINEERING & MODERNIZATION Golang: High-concurrency backends, microservices, and performance-critical APIs. PHP (Legacy & Modern): Refactoring older codebases, Laravel/Symfony development, and Workerman/Swoole for high-speed sockets. Python: Flask apps, Data Mining, and automation scripts for financial (MT5) or research data. SECURITY, DEVOPS & QA CyberSecurity: Professional Penetration Testing, VAPT reports, and Secure Code Review. Infrastructure: DevOps expert for AWS, Azure, and Alibaba Cloud. Email Hardening: Comprehensive SPF/DKIM/DMARC and security header implementation. Testing: Automated (Selenium/Pytest) and Load Testing for high-traffic events. TECHNICAL STACK SNAPSHOT Languages: PHP (Expert), Golang (Expert), Python, JavaScript (VueJS). Databases: ClickHouse, Elasticsearch, MySQL, Redis. Cloud & DevOps: Alibaba Cloud, AWS, Azure, Docker (WSL2), Kubernetes, n8n. WHY HIRE ME? Versatility: I can debug a 10-year-old PHP script in the morning and architect a Go-based microservice in the afternoon. Security Mindset: My OSWE certification means security is never an afterthought; it is built into the foundation. Local Presence: I remove the technical and regulatory friction for Western companies operating in or expanding to China.