• Executed multi-turn model comparisons and side-by-side evaluations of Tier-1 LLMs in developer environments (Tier-1 AI Coding Environment).
• Analyzed agentic workflows, identified code hallucinations/logic bugs, and authored strict step-by-step verification rationales to refine model safety and accuracy.

Tech stack: Tier-1 AI Coding Environment, Tier-1 LLMs, RLHF, A/B Testing, Code Refactoring

• Architected a modern multi-tenant Point of Sale (SaaS) platform, implementing strict Row-Level Security (RLS) at the PostgreSQL database level to guarantee isolated tenant data operations.
• Engineered ACID-compliant checkout flows using Prisma Interactive Transactions with automated rollback mechanisms for expired or cancelled Midtrans QRIS payment sessions.
• Developed a secure backend architecture utilizing Node.js and TypeScript, handling complex edge cases like COGS snapshots and cash drawer discrepancies.

Tech stack: Node.js, TypeScript, PostgreSQL, Prisma, React, Zustand, Tailwind CSS

• Engineered and maintained a secure procurement system utilizing Laravel, reducing purchasing processing bottlenecks.
• Developed a responsive, user-centric CRM platform with Vue.js and React.js, enhancing customer relationship tracking efficiency.
• Built and optimized high-performance RESTful APIs using Node.js and Laravel to enable seamless integration with third-party services.
• Integrated Socket.io and Firebase to establish real-time communication features and secure user authentication across multiple applications.
• Managed containerized application deployments using Docker and Google Cloud Platform (GCP) to ensure reliable system availability.

Tech stack: Laravel, Node.js, Vue.js, React.js, Tailwind CSS, Bootstrap, PrimeVue, Socket.io, Firebase, MySQL, Docker, GCP

• Designed and delivered a cross-platform Warehouse Management System (WMS) supporting both web and mobile channels.
• Achieved 100% operational error reduction across warehouse deployments through comprehensive automated testing and strict quality assurance protocols.
• Developed an intuitive cross-platform mobile application via Flutter featuring robust offline capabilities and seamless local storage management.
• Implemented real-time data synchronization utilizing WebSocket technology to ensure instantaneous inventory updates across all clients.

Tech stack: Flutter, Laravel, JavaScript, Bootstrap, WebSocket

• Led the end-to-end development of an enterprise-level HRIS system, driving a 40% reduction in HR administrative processing time through workflow automation.
• Accelerated user onboarding and reduced training time by 50% by building an intuitive, highly interactive frontend using Vue.js and Bootstrap.
• Implemented complex business logic and automated approval workflows using Business Process Maker integrated with Laravel and CodeIgniter backends.
• Optimized database architecture and query structures across MySQL and Oracle systems, significantly improving data retrieval speeds for payroll processing.

Tech stack: Business Process Maker, Laravel, CodeIgniter, Vue.js, Bootstrap, Oracle, MySQL

• Built and deployed a high-traffic business portal website with Laravel and Vue.js, triggering a 40% increase in user engagement metrics.
• Designed scalable backend infrastructures, establishing robust RESTful APIs and secure multi-tier authentication systems.
• Streamlined database performance through efficient query indexing strategies and database schema normalization using MySQL.

Tech stack: Laravel, Vue.js, Bootstrap, MySQL