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WIDODO

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.

Docker
Docker
NestJS
NestJS
Prisma
Prisma
Next.js
Next.js
React
React
Supabase
Supabase
Go
Go
n8n
n8n
PostgreSQL
PostgreSQL
Redis
Redis
Vue.js
Vue.js
Docker
Docker
NestJS
NestJS
Prisma
Prisma
Next.js
Next.js
React
React
Supabase
Supabase
Go
Go
n8n
n8n
PostgreSQL
PostgreSQL
Redis
Redis
Vue.js
Vue.js
12PortfolioSelected work and case studies12NotesNotes and writing

Featured Project

Balesin- WA RAG Chatbot

WhatsApp RAG AI Assistant Platform

Latest Note

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 zero-downtime, mesin pengiriman ulang webhook cerdas (Smart Resend Callback), proteksi Excel Formula Injection, dan deep log sanitization.