Khawaja Fashi
ud Din Abdullah
I build resilient backend systems where performance and security aren't afterthoughts — they're the foundation. Node.js and Python backend developer with a cybersecurity foundation. Shipped JWT/RBAC authentication cutting API latency by 73%, and protecting 113 API routes at Quem Systems.
about
I design secure systems where latency and threat surfaces are systematically crushed. Combining operational cybersecurity with solid backend engineering in Node.js and Python, I focus on performance architecture, authentication validation protocols, and reliable real-time analytics pipelines.
experience
Architected a 4-tier authorization layer, scoping every endpoint to granular roles and shrinking the attack surface across the API.RBAC
Implemented stateless authentication using rotating refresh flows and secure server-side validation to protect 113 API routes.HS256 JWT
Parallelised 17 high-frequency database queries (PostgreSQL/MongoDB) to serve subscription metrics, reducing API response latency by 73%.Promise.all
Built a client-side interceptor that automatically refreshes expired JWTs on 401, queues in-flight requests, and replays them transparently.Axios interceptor
projects
IoT Rogue Traffic
Detection Simulator
Python /MQTT /Scikit-learn /Streamlit
A real-time anomaly detection pipeline that ingests simulated IoT telemetry over MQTT and flags rogue traffic patterns using a trained Random Forest classifier. Surcovers threats in seconds, not minutes — with a live simulation and network categorization tool.
HypeWait Queue Drops
Node.js ·Redis ·WebSocket ·JWT
Hash-based Proof-of-Work virtual queue system for high-demand product drops. Admission controlled by client-side PoW computation, preventing bot flooding without CAPTCHAs.
LiveTeamGames Grid
Node.js ·PostgreSQL ·WebSocket ·REST API
Real-time coordination platform with server-side coordinate tracking, team state management, and a live map-grid interface for match event visualization.