WIDODO

WIDODO is a backend developer. Backend Developer with 2+ years of professional experience building scalable backend systems and production-grade APIs using NestJS, ExpressJS, PostgreSQL, Prisma, Redis, and Docker. Experienced in developing payment infrastructure, ISP operational systems, AI-powered applications, and automation platforms with strong focus on backend architecture, API security, system optimization, and production reliability. Skilled in handling transaction workflows, race condition prevention, real-time processing, and production deployment in operational environments.

Selected Projects

• Balesin- WA RAG Chatbot — WhatsApp RAG AI Assistant Platform [Live]
• Payment Gateway Middleware | Internal Company Project — application is a platform for payment orchestration and ERP integration
• CryptoSpike — Crypto Trading Automation & Analytics Platform [Live]
• Ucansee — Your Digital Identity, Beautifully Crafted, Create and share your beautiful digital cards easil... [Live]

Recent Notes

• 5. Arsitektur Keamanan & Ekosistem Partner: Dynamic App-Key HMAC Signature, Smart Resend Callback, dan Sanitasi Data — Studi kasus membangun lapisan keamanan terpusat: autentikasi Multi-Tenant HMAC-SHA256 dengan migrasi...
• 4. Self-Healing Financial Reconciliation: Membangun Two-Phase Recovery & Settlement Worker untuk Integrasi Core ERP — Studi kasus merancang sistem rekonsiliasi otomatis dua fase (Two-Phase Self-Healing Reconciliation)...
• 3. Resilient ERP Integration & Edge Case 'Late Payment': Mengatasi Socket Hang-Up RPC dan Pembayaran Lintas Sesi — Studi kasus membangun mekanisme auto-reconnect pada koneksi RPC ke sistem Core ERP yang rentan menga...