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MasterKN48 (Nitin Kumar) ยท GitHub

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MasterKN48/README.md

Senior Full Stack Engineer | AI Agent Architect | Team Lead ๐Ÿš€

6+ Years of Experience building high-performance, secure, and scalable distributed systems.


๐ŸŒŸ Executive Summary

I specialize in transforming complex business requirements into high-performance technical architectures. Whether it's optimizing Core Web Vitals for a 300% performance boost, architecting Service oriented Architecture on AWS, or leading teams to ship micro frontend applications for enterprise-scale or building efficient scalable backend services, I focus on engineering excellence and scalability.

  • ๐Ÿ—๏ธ Architecture: Expert in Micro-frontends, Microservices, and Service-Oriented Design (SOD).
  • ๐ŸŽจ Frontend Excellence: Huge expertise in modern React/Next.js ecosystems, CSS-in-JS, and sophisticated state management (Redux/Zustand). Proven track record of drastic optimization in Core Web Vitals and LCP/FID metrics.
  • โšก Performance Specialist: Deep expertise in full-stack optimizationโ€”from Frontend (LCP/FID optimization, code-splitting) to Backend (DB indexing, Redis caching, and scaling high-throughput APIs).
  • ๐Ÿ›ก๏ธ Security & DevOps: Basic knowledge of Application Security (OWASP Top 10) and building scalable infrastructure on AWS with CI/CD.
  • ๐Ÿ‘ฅ Leadership: Experienced in mentoring juniors, leading agile teams, and building design systems from scratch.

๐Ÿ›  Technical Ecosystem

๐Ÿค– AI & Intelligent Systems

  • Frameworks: LangChain, LangGraph, FastMCP, WebMCP
  • Inference: vLLM, Ollama (Local LLM Deployment)
  • Apps: Streamlit, LangSmith, Opik (Observability)
  • On-Device: Transformers.js, Onnxruntime, liteRT.js, WebLLM

๐Ÿ’ป Full Stack Engineering

  • Backend: Express.js, Nest.js, Node.js, FastAPI, GraphQL
  • Frontend: Next.js, React, Redux, Zustand, SASS/CSS3
  • CMS: Strapi (Headless), Custom CMS Development
  • Real-time: WebRTC (P2P Video/Data), Socket.io

โ˜๏ธ DevOps & Cloud

  • Infrastructure: AWS (EC2, Autoscaling, S3, RDS, ...etc), Terraform
  • CI/CD: GitLab CI/CD pipelines, GitHub Actions
  • Databases: PostgreSQL, MongoDB, Redis
  • Linux: Shell Scripting, Dockers, Kubernetes Basics

๐Ÿ“ Architecture & Design

  • Patterns: Microservices, Event-Driven Architecture
  • Design Systems: Building reusable UI frameworks
  • Efficiency: Content migrations, DB optimization
  • Security: CSRF/XSS protection, JWT/OAuth2

๐Ÿš€ Featured Engineering Work

Ultra-fast, lightweight portable media gallery for local and external storage (SSD,HDD) cross platform (windows,macos,linux). Built with Tauri, Svelte 5, and Rust. Features parallel SSD scanning, EXIF extraction, custom grid virtualization, and a glassmorphic viewer with metadata panels. Engineered using a high-performance native Rust/Tauri backend and a reactive Svelte 5 SPA frontend.

A professional, highly customizable, and offline-capable interactive AI pocket resume builder. Features a live preview, drag-and-drop layout system, migrate from any existing resume, ask local ai to edit or your improve resume and flawless PDF export capabilities, complete offline capbility, instant complete privacy of data. Built with Preact, Vite, and PWA technologies.

Mediasoup Meeting App (Monorepo): A high-performance, secure, and modern WebRTC application built with Mediasoup (SFU), Bun, and Next.js 16.

  • SFU Architecture: Leverages Mediasoup for high-bandwidth, multi-user media routing instead of resource-intensive Mesh/P2P.
  • Low Latency: Sub-100ms latency for global video/audio streaming.
  • Security First: JWT-authenticated signaling and Mediasoup DTLS/SRTP protection.
  • Modern UI/UX: Next.js 16 powered with View Transitions API and Partial Prerendering (PPR).
  • Type Safety: End-to-end TypeScript with Zod-OpenAPI for self-documenting APIs.
  • High-Fidelity Media: Support for 1080p60 streaming with adaptive simulcast layers (HD, SD, Low) for optimal performance.
  • Scalable Infrastructure: Containerized with Docker and ready for Kubernetes.

๐Ÿš€ A private, local-first ReCAPTCHA solver using Transformers.js and Whisper ASR. Feature-rich with intelligent automation and Chrome Side Panel integration.

  • Local ASR: Uses Transformers.js v4 and the Xenova/whisper-tiny model to transcribe audio challenges locally.
  • Privacy First: No audio data is uploaded to any backend. Everything happens in an offscreen document on your machine.
  • Side Panel Experience: Click the extension icon to manage settings and monitor model progress in a convenient sidebar.
  • Intelligent Automation: Automatically switches to audio mode once the solver button and challenge are visible.
  • WebGPU Acceleration: Blazing fast transcription using WebGPU (fp16/f32) or WASM fallback.
  • Modern Stack: Built with React, Vite, Bun, and Transformers.js v4.

Let'sTalk.live โ€” A real-time, privacy-first AI voice translation agent that runs 100% locally in your browser. Features on-device STT, LLM translation, & Voice Synthesis with zero backend servers required.

  • Tech: Transformer.js, WebGPU, runanywhereSDK, onnxruntime-web, Huggingface models.

About Watch YouTube In Office (MS Teams Stealth Disguise): An interactive Chrome Extension built with Preact, Vite, Tailwind CSS, and Bun that transforms your YouTube video page into a high-fidelity Microsoft Teams meeting interface. Work hard, play hard, watch stealthily.

A client-side, AI-powered Profile Picture Generator and Indian Passport Photo Maker. Centers faces automatically with TensorFlow.js, offers adjustable rounding, custom date overlays, and real-time WebP compression. 100% private, no server uploads.

Local-First AI Voice Translation with voice cloning

  • Engineered a high-performance, real-time voice translation agent using LangGraph for complex stateful workflows.
  • Optimized for Apple Silicon with MLX-Audio, achieving sub-2s latency for English-Hindi translation with zero-shot voice cloning.
  • Tech: LangGraph, MLX-Audio, Whisper, Qwen, Streamlit, Huggingface models

๐Ÿš€ Privacy-first browser AI. Powers the Alibaba Page Agent chatbot using local FunctionGemma models via WebGPU. Fast, secure, and zero-data-leakage on every tab.

  • Tech: Transformer.js, WebGPU, onnxruntime-web, Alibaba Page-Agent, Huggingface models.

Real-time Synchronization & WebRTC

  • Built a P2P video chat platform with a unique Synchronized YouTube Player.
  • Solved complex state synchronization challenges for real-time collaborative watching.
  • Tech: WebRTC, Socket.io, PeerJS, React.

Privacy-First Browser Computing

  • Developed a client-side file converter (Images, Audio, PDF) using FFmpeg.js.
  • Utilized Web Workers for non-blocking UI during heavy processing.
  • Zero server-side footprint, ensuring 100% data privacy.

Geo-Location Microblogging

  • A location-aware PWA using GraphQL and Apollo for efficient data fetching.
  • Implemented real-time mapping interfaces for localized content discovery.
  • Tech: GraphQL, React, MongoDB, Cloudinary.

Advanced CMS & Social Engine

  • Scalable MERN stack blogging platform with complex social features (Follows, Likes, Threaded Comments).
  • Includes a comprehensive Admin Dashboard for content moderation and analytics.

High-Performance Utility

  • A hyper-fast developer tool built with Preact for immediate placeholder generation with a minimal 3KB footprint.

๐Ÿ“ˆ Engineering Impact

  • Performance: Reduced LCP (Largest Contentful Paint) by over 60% on legacy enterprise applications.
  • Security: Conducted security audits for MERN/Nest.js apps, mitigating OWASP Top 10 vulnerabilities.
  • Scalability: Optimized AWS Autoscaling groups to handle 5x traffic spikes during seasonal launches.
  • Mentorship: Successfully onboarded and trained 10+ junior developers in modern React and Node.js patterns.

๐Ÿ“Š GitHub Stats


"Quality is not an act, it is a habit."
Let's build something exceptional.

Pinned Loading

  1. letsTalkMeetingApp letsTalkMeetingApp Public

    Mediasoup Meeting App (Monorepo): A high-performance, secure, and modern WebRTC application built with **Mediasoup (SFU)**, **Bun**, and **Next.js 16**.

    TypeScript

  2. Let-s-Solve-Captcha Let-s-Solve-Captcha Public

    ๐Ÿš€ A private, local-first ReCAPTCHA solver using Transformers.js and Whisper ASR. Feature-rich with intelligent automation and Chrome Side Panel integration.

    JavaScript

  3. OpenBook-E-Commerce OpenBook-E-Commerce Public

    An e-commerce progressive web application, built with mern stack. It has features like product buy, order management by admin, payment gateway, cart, checkout and lot more.

    JavaScript 65 29

  4. ReadWrite ReadWrite Public

    A complete MERN stack app for content management or blogging. It has user section, blog writing, likes-dislike , comments, follow-unfollow , admin section, profile management.

    JavaScript 8 3

  5. letsTalkVoiceAgent letsTalkVoiceAgent Public

    A high-performance, fully local real-time voice translation agent built for Apple Silicon. Features seamless English-Hindi translation, zero-shot voice cloning, and a stateful agentic workflow orchโ€ฆ

    Jupyter Notebook 2

  6. aio aio Public

    a platform for file type conversion only at client-side no use of server for file storage or any type of logging

    JavaScript 2 1


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