KingCodex

TypeScript
JavaScript
SQL
Python
NestJS
Node.js
Express
REST APIs
Webhooks
BullMQ / Bull
Redis
PostgreSQL
TypeORM
Prisma
Docker
Linux
Git
API security

Backend/API security
Smart contract development
Smart contract auditing

Available for backend engineering, API architecture, application security reviews, technical writing, open-source collaboration, consulting and fintech infrastructure projects.