FULLSTACK
2026Real-time collaborative code editor featuring conflict-free CRDT synchronization, Docker-isolated multi-language code execution runners, and Redis-backed room state.
Available for Software Engineering Roles
Harshal
Kotkar.
I'm aSoftware Developer
Building distributed backends, real-time collaboration engines, and AI agent pipelines that turn complex systems into reliable, sub-second products.
Harshal Kotkar
Software Engineer • Pune, India
B.E. Information Technology • July 20261800+
LeetCode Rating
Top tier competitive problem solving
500+
Problems Solved
DSA on LeetCode & GeeksforGeeks
8.31
Engineering CGPA
B.E. Information Technology
50+
Concurrent Sockets
Real-time telemetry & collaboration
500+
Readings / Hr
TimescaleDB hypertable ingestion
Engineering Philosophy
Turning complex distributed problems into resilient, production-ready software.
I am a Full-Stack Software Engineer with a deep passion for system architecture, real-time communication protocols, and high-performance databases. My work bridges the gap between scalable distributed backends and refined, responsive user experiences. From building conflict-free collaborative platforms with CRDTs to optimizing time-series hypertable ingestion at IIT Bombay, I prioritize correctness, sub-second latency, and clean modular code.
01
Scalable Systems & Backends
Designing high-throughput RESTful and event-driven architectures with Node.js, Express, BullMQ, and Redis for rock-solid concurrency.
02
Real-Time & Distributed State
Implementing conflict-free real-time collaboration using Yjs CRDTs, WebSockets, and isolated Docker execution sandboxes.
03
Modern Full-Stack & AI
Crafting polished React/Next.js interfaces integrated with LangChain/LangGraph pipelines, vector stores, and robust database layers.
Technical Stack
The technologies powering my software
A curated stack spanning distributed backends, real-time protocols, databases, and AI pipelines.
Languages6 Listed
C++JavaScriptPythonJavaTypeScriptSQL
Hover over any technology badge to inspect it. Fully extendable in /data/portfolio.json.
C++✦JavaScript✦Python✦Java✦TypeScript✦SQL✦React.js✦Redux Toolkit✦Zustand✦HTML✦Tailwind CSS✦Vite✦Node.js✦Express.js✦REST API Design✦Microservices✦WebSockets✦Socket.IO✦Event-Driven Architecture✦BullMQ✦Redis Pub/Sub✦LangChain✦LangGraph✦RAG Pipelines✦VectorStore✦Embeddings✦ReAct Agents✦LLM APIs✦LangSmith✦Semantic Search✦PostgreSQL✦MongoDB✦TimescaleDB✦Redis✦MySQL✦Docker✦Git✦GitHub✦GitHub Actions✦Azure Pipelines✦Postman✦Linux✦JWT✦OAuth 2.0✦RBAC✦bcrypt✦Token Refresh✦Secure API Design✦C++✦JavaScript✦Python✦Java✦TypeScript✦SQL✦React.js✦Redux Toolkit✦Zustand✦HTML✦Tailwind CSS✦Vite✦Node.js✦Express.js✦REST API Design✦Microservices✦WebSockets✦Socket.IO✦Event-Driven Architecture✦BullMQ✦Redis Pub/Sub✦LangChain✦LangGraph✦RAG Pipelines✦VectorStore✦Embeddings✦ReAct Agents✦LLM APIs✦LangSmith✦Semantic Search✦PostgreSQL✦MongoDB✦TimescaleDB✦Redis✦MySQL✦Docker✦Git✦GitHub✦GitHub Actions✦Azure Pipelines✦Postman✦Linux✦JWT✦OAuth 2.0✦RBAC✦bcrypt✦Token Refresh✦Secure API Design✦
Career & Education
The Engineering Journey
Real-world backend engineering at premier research labs and rigorous Information Technology foundations.
InternshipMumbai, India
May 2025 — July 2025
Software Development Engineer Intern – Full-Stack
E-Yantra, IIT Bombay• IIT Bombay
Architected backend infrastructure, hypertable time-series partitioning, and interactive real-time telemetry dashboards for high-frequency IoT sensor networks.
500+Readings / Hr
50+Sockets Live
< 1sAlert Latency
Engineering Deliverables
Built and deployed high-performance Node.js / Express.js REST APIs for automated data acquisition and sensor telemetry ingestion.
Engineered TimescaleDB hypertables with composite indexing and automated partitioning, sustaining continuous ingestion of 500+ sensor readings/hour with sub-second query performance.
Developed an interactive frontend dashboard in React.js paired with a Socket.IO WebSocket layer supporting 50+ concurrent streaming client connections.
Implemented threshold-based anomaly detection algorithms with sub-second alert triggers on abnormal sensor values.
Node.jsExpress.jsPostgreSQLTimescaleDBSocket.IOReact.jsWebSocketsDocker
UndergraduateCompleted July 2026
Nov 2022 — July 2026
Bachelor of Engineering (B.E.)
Major in Information Technology
PES Modern College of Engineering, Pune•Pune, India
Academic StandingCGPA: 8.31 / 10First Class with Distinction
Comprehensive IT engineering curriculum emphasizing algorithm design, database optimization, distributed operating systems, and networked software architectures.
Top 10 GeeksforGeeksTop 10 institutional coder ranking in algorithmic problem-solving contests.
Head, NSS Volunteer CorpsLed 50+ student volunteers across community health and rural outreach drives.
Core Computer Science & IT Curriculum
Data Structures & AlgorithmsObject-Oriented ProgrammingDatabase Management SystemsComputer NetworksOperating SystemsDistributed Systems
Selected Work
Architected, built & benchmarked
Production-grade collaborative software, e-learning infrastructure, and distributed real-time platforms.
FULLSTACK
2025Full-stack edtech platform featuring course management, adaptive video delivery, student progress tracking, and idempotent payment webhooks.
AI
2025Agentic retrieval-augmented generation engine with LangChain and LangGraph for autonomous code analysis, semantic search, and multi-step reasoning.
Verified Milestones
Milestone Showcase & Recognition
Proven algorithmic excellence, national engineering finalist standing, and demonstrated community leadership.
01Competitive Programming
1800+ Rating
LeetCode Rating 1800+ & 500+ Problems Solved
Consistent problem solver across Data Structures & Algorithms, graph theory, dynamic programming, and system design patterns on LeetCode and GeeksforGeeks.
500+ Solved • DSA & System DesignVerified →
03Academic Excellence
Top 10 Rank
Ranked Top 10 in GeeksforGeeks College Rankings
Secured top-tier ranking in PES Modern College of Engineering's institutional coding standings through continuous problem solving and algorithmic contests.
GeeksforGeeks Institutional StandingVerified →
02Innovation & Engineering
IIT Bombay
Regional Finalist — e-Yantra Innovation Challenge (eYIC), IIT Bombay
Designed and engineered a blockchain-based healthcare supply chain solution integrating IoT hardware sensors with a secure distributed backend system.
e-Yantra Innovation Challenge FinalistVerified →
04Leadership & Community
50+ Volunteers
Head, National Service Scheme (NSS)
Led a team of 50+ student volunteers across comprehensive community outreach programs, blood donation camps, and rural welfare initiatives reaching 1,000+ beneficiaries.
Head of NSS • 1,000+ BeneficiariesVerified →
Get in Touch
Let's build something exceptional together.
I am open to Software Engineering roles, Full-Stack internships, and technical collaborations. Whether you have a position to fill or an exciting system to architect, feel free to reach out.
Pune, India+91 7249394597