Data Engineer Freelance Consultant
E&J TRANSPORATION
Jan 2025 - Current (1 year 10 months)
Architected and developed a comprehensive Fullstack Web Application (Next.js frontend, NestJS backend, and PostgreSQL) to completely digitize and automate the trucking business, replacing manual Google Sheets and Drive files with a unified custom platform.
Implemented typesafe API generation between Next.js and NestJS using Orval, streamlining development speed, API safety, and maintenance.
Designed and built a highly stateful, event-driven WhatsApp bot (TypeScript, OpenRouter API, and PostgreSQL on NestJS) that serves as the primary operational channel for 20+ drivers and administrators, featuring stateful session management, interactive menus, and proactive notifications.
Integrated a custom agent tool suite in the WhatsApp