I'm a Technical Architect with 5+ years of experience designing and scaling enterprise-grade cloud infrastructure. I specialize in PostgreSQL database systems, Node.js applications, and multi-region AWS architecture.

My work sits at the intersection of database engineering, cloud infrastructure, and application development — and I enjoy building things that are both performant and maintainable.

• 🏗️ Focus: Cloud-native architecture, database optimization, DevOps
• 💬 Ask me about: PostgreSQL · Node.js · AWS · Flask · TypeScript
• 📫 Reach me: rajarsi3997@gmail.com · rajarsi.work
• ☕ Fuel: Chai, always.

Technical Architect · SysCloud · Hyderabad, Telangana, India

Database performance tuning, cloud ops/DevOps, and PostgreSQL query optimization across enterprise-scale AWS infrastructure.

• 🤖 Build AI Agents using MCP — IBM (Coursera)
• 🧩 Agentic AI Fundamentals: Architectures, Frameworks, and Applications — LinkedIn Learning

Languages

Frameworks & Runtimes

Databases

Cloud & Infrastructure

Tools & Platforms

I build with LLM-powered agents and coding assistants daily — from Claude Code driving infrastructure diagnostics to model APIs wired into backend services.

• 🤖 Assistants & Coding Agents: Claude Code · GitHub Copilot · Cursor
• 🧠 Model APIs: Anthropic Claude · OpenAI GPT · Google Gemini · Perplexity
• 🔗 Frameworks: LangChain · Hugging Face Transformers
• 📦 Local & Open Models: Ollama · Mistral

Data visualization and spread analysis of COVID-19 across the Indian subcontinent

• Visualized geographic diffusion of COVID-19 across Indian states using real-world datasets
• Proposed predictive techniques for modelling future spread trajectories
• Technologies: Python Jupyter Notebook Pandas Data Visualization

Web-based authentication system using facial recognition — ⭐ 14 stars · 🍴 11 forks

• Replaced traditional password login with real-time face detection and recognition
• Extensible design allows integration into any web application
• Technologies: Python OpenCV Flask HTML JavaScript

Real-time video conferencing application built with Flask and OpenTok — ⭐ 1 star · 🍴 2 forks

• Full-featured video chat with room creation and peer-to-peer WebRTC connections
• Integrated Vonage OpenTok API for live video streaming
• Technologies: Flask Python OpenTok API HTML JavaScript

Official event website for PU3D 2020

• Designed and deployed a fully functional event website
• Technologies: JavaScript HTML CSS

Browser-based music player

• Lightweight player with playlist management and playback controls
• Technologies: HTML CSS JavaScript

Enforcing a 2-year data retention policy at the database layer using RLS across 74 hash partitions — PERMISSIVE vs RESTRICTIVE policies, composite partial indexes, and common pitfalls.

Why PostgreSQL's query planner sometimes bypasses well-designed indexes — stale statistics, JSONB expansion costs, implicit casting, and cardinality mismatches.

Comparing Flask's lightweight flexibility with Django's full-stack approach through practical "Hello World" implementations.

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