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darkNIGHT669/README.md

πŸ‘‹ Hi, I'm Harsh Dahiya

Associate Software Engineer | Full-Stack & AI/LLM Developer

πŸš€ Passionate about building robust, end-to-end full-stack systems, scalable backend architectures, and production-grade AI/LLM pipelines.

πŸ“¬ Reach out to me: LinkedIn Portfolio LeetCode Email


⚑ Quick Overview

  • πŸ’Ό Current Role: Associate Software Engineer at Oryx International Logistics (working on enterprise backend microservices, REST APIs, and database optimizations).
  • πŸŽ“ Education: B.Tech in Electronics & Communication Engineering (2025).
  • 🧩 DSA Problem Solving: 290+ problems solved in C++ on LeetCode.
  • πŸ› οΈ Core Focus: Building high-performance RAG pipelines, secure multi-tenant architectures, and real-time streaming interfaces.

πŸ› οΈ Tech Stack & Tools

Category Technologies
Languages JavaScript TypeScript Python C++ SQL
Frontend Next.js React Tailwind CSS Zustand React Native
Backend Node.js Express FastAPI Celery Socket.io
AI & LLM LangChain RAG Pipelines
Databases PostgreSQL MongoDB Redis Supabase
DevOps & Cloud Docker GitHub Actions AWS Nginx

πŸš€ Featured Projects

🧠 PanScience Q&A β€” AI Document & Multimedia Intelligence

Full-stack RAG platform enabling interactive Q&A over PDFs, audio, and video files.

  • Backend: FastAPI with LangChain and pgvector for cosine similarity retrieval, integrated with OpenAI GPT-4o.
  • Key Features: Server-Sent Events (SSE) for streaming text, Whisper API for timestamp-level citations, Redis for distributed rate limiting (SlowAPI) and chat history session management.
  • Quality Assurance: Containerized using Docker Compose with 95%+ unit and integration test coverage.

πŸ’Έ SpendSight β€” AI Spend Audit Platform

Live fintech-style platform auditing startup SaaS spend on AI tools. Live at spentsight.vercel.app.

  • Stack: Next.js 14, TypeScript, Anthropic Claude API, Supabase (PostgreSQL).
  • Security First: Implemented Supabase Row Level Security (RLS) policies for complete tenant data isolation.
  • Deterministic Compute: Custom-engineered a TypeScript AuditEngine with zero LLM dependency to ensure flawless, deterministic financial calculations.

πŸš› LogiTrace β€” Logistics Middleware & Analytics Dashboard

High-performance middleware simulating production workloads and dashboard analytics.

  • Performance: Achieved a 35%+ database query latency reduction (benchmarked from ~200ms down to ~130ms) using optimized MongoDB aggregation pipelines.
  • Type Safety: Shared Zod schemas between Next.js frontend and Express backend to enforce end-to-end runtime contract security.
  • Simulation: Designed a custom Prisma-seeded data simulator generating hundreds of mock shipments across variable latency classes.

βš™οΈ AI-Powered Transaction Pipeline β€” Async Data Ingestion

Asynchronous transaction processing pipeline decoupling heavy computation from client endpoints.

  • Architecture: FastAPI, Celery, and Redis backend, returning immediate job status tokens and polling asynchronously.
  • Pipeline: 5-stage Celery worker flow integrating Google Gemini 1.5 Flash batching (20 records/call) with exponential backoff retries.
  • Analytics: Statistical outlier flagging (>3x per-account median) combined with LLM anomaly classification.

πŸ“Š Most Used Languages

Harsh's Top Languages


πŸ’Ό Career Goals

I thrive on solving performance bottlenecks, designing clean databases, and engineering robust backend systems. If you're looking for a proactive software engineer who can jump into a complex codebase and ship high-impact features with high test coverage, let's connect!

Pinned Loading

  1. spentsight spentsight Public

    Live AI Spend Audit Platform for startups. Audits SaaS spend deterministically with 100% precision and secures tenant data using Supabase Row Level Security (RLS).

    TypeScript

  2. ai-txn-pipeline ai-txn-pipeline Public

    Asynchronous transaction processing pipeline decoupling CSV ingestion from compute using Celery and Redis with Gemini 1.5 Flash batching.

    Python

  3. Panscience Panscience Public

    Full-stack RAG document & video intelligence platform with pgvector cosine similarity, SSE streaming (GPT-4o), and Whisper API citations. 95%+ test coverage.

    Python

  4. ai-kyc-document-verification ai-kyc-document-verification Public

    KYC verification engine processing government IDs and bank statements using Azure OCR, Google Vision API, and GPT-4 name/DOB validation rules.

    Python 1

  5. financial-document-analysis-ai financial-document-analysis-ai Public

    Python

  6. Real-Time-Messaging-Platform-Next.js-Convex- Real-Time-Messaging-Platform-Next.js-Convex- Public

    TypeScript 1