Sole developer for an end-to-end ERP/MES-style platform, independently architecting a 50+ table relational database schema and 100,000+ line codebase supporting order processing, lot-level material traceability, and fuel cell manufacturing workflows.
Led the live OpenCart 1.5 to 3.0 e-commerce migration for 2,000+ products and 70,000+ historical orders, including custom SQL migration scripts, UI redesign, and zero data loss.
Built and maintained REST APIs, optimized SQL and reporting workflows, stabilized production systems, and used AI-assisted development tools to shorten delivery cycles.
Collaborated with product managers and senior engineers to design, analyze, and implement system features aligned with business requirements.
Contributed to interface protocols, technical documentation, and API integrations for trading-platform workflows.
Developed and tested frontend and backend components to improve system reliability and performance.