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gurumaan/README.md

Gursharan Singh

Full-Stack Software Engineer & Systems Builder

TypeScript  ·  React 19  ·  Node.js  ·  Python  ·  PostgreSQL  ·  Linux VPS / Nginx

Portfolio Email Status


"Simple code runs fast, handles failures gracefully, and stays maintainable."

🔨 About Me

I am a Full-Stack Software Engineer architecting high-reliability web systems, offline-first data replication layers, and 24/7 autonomous cloud daemons. I focus on building software that businesses can run their core operations on without fragile abstractions.

  • ⚡ Frontend Engineering: React 19, TypeScript, Next.js 14, Vite, Web Audio API, Canvas 2D / Verlet Physics engines, and accessible CSS design systems.
  • 🛠️ Backend & APIs: Node.js (Express), Python 3, asynchronous event-driven pipelines, RS256 JWT auth with JWKS key rotation, and signed webhooks.
  • 🗄️ Data & Replication: PostgreSQL, SQLite, PowerSync logical replication streams, Redis caching, and persistent state deduplication.
  • ☁️ Infrastructure & DevOps: Linux (Ubuntu) VPS provisioning, Nginx reverse proxy hardening, automated Let's Encrypt SSL, Cloudflare WAF, and GitHub Actions CI/CD workflows.

🚀 Featured Engineering Projects

🎵 Playify

Music Streaming PWA, Real-Time Spotify Jam & Android APK

Full-featured audio streaming platform featuring real-time Spotify Jam multi-device sync (<10ms delay via WebRTC PeerJS & MQTT), offline service worker caching, Android APK build, and pure DES cryptographic media stream decryption.

🍽️ DineFlow

Real-Time QR Table Ordering, Kitchen KDS & Hospitality OS

Enterprise hospitality operating system featuring zero-install guest table ordering, multi-station kitchen display routing, tactile Web Audio POS acoustic counter bell synthesizer, live elapsed ticket timers, and 80mm thermal receipt printing.

⚡ PowerSync Offline-First Engine

Bidirectional SQLite to PostgreSQL Data Sync Backend

Deterministic synchronization service linking edge client SQLite databases with cloud PostgreSQL instances. Features short-lived RS256 JWT generation, public JWKS endpoint for cryptographic token verification, and structured logging.

🤖 ScoutFlow Intelligence Daemon

24/7 Autonomous Market Intelligence & Job Hunter Daemon

Background pipeline running on scheduled cloud runners to audit 8+ remote job boards, extract direct founder contact addresses with regex heuristics, maintain persistent SHA-256 deduplication state, and dispatch real-time Telegram alerts.

🎨 Artisan Corkboard Portfolio

Tactile Craftsman Developer Portfolio & Physics Engine

Handcrafted portfolio interface with multi-node Verlet pull-chain physics, ambient room lighting (Midnight tungsten vs. Daylight workshop), native synthesized Web Audio sound effects, and zero heavy frameworks.

🧰 Technical Arsenal

Gursharan Singh Tech Stack

📊 GitHub Activity

Gursharan Singh GitHub Stats    Top Languages

📬 Direct Channels

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    Deterministic offline-first synchronization backend replicating data between edge SQLite and server-side PostgreSQL with JWKS token verification.

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    Artisan Corkboard Portfolio of Gursharan Singh — Full-Stack & Systems Engineer. Verlet physics, native web audio & physical skeuomorphic design.

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    Web Architecture, OWASP Security & Tech Stack Auditor. Real-time header inspection, scoring & framework remediation.

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    Autonomous Market Intelligence & Job Hunter Daemon. 24/7 background pipeline with SHA-256 state deduplication & Telegram alerts.

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