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AJOYSR/README.md

πŸ‘‹ Hi, I’m Ajoy Sarker

Software Engineer I @ Brain Station 23 PLC | Full-Stack Developer


πŸš€ About Me

  • πŸ’» Full-stack developer skilled in NestJS, Node.js, React, React Native, MongoDB, PostgreSQL, Vector DBs
  • πŸ€– Worked on AI-driven solutions β€” RAG systems, GenAI chatbots, voice-to-action workflows, and CRM automation
  • 🌍 Passionate about building scalable, user-centric applications with clean architecture & modern DevOps practices
  • πŸŽ“ MSc & BSc in Computer Science & Engineering from Jahangirnagar University, Bangladesh

πŸ› οΈ Tech Stack

Languages: TypeScript, JavaScript, Python, Java, C/C++, SQL, NoSQL
Frameworks & Libraries: NestJS, Node.js, React, React Native, Next.js, Django, Tailwind, Material-UI
Databases: MongoDB, PostgreSQL, Vector DBs (pgvector, Typesense)
AI/ML: RAG, Fine-tuning, Embedding, LangGraph, Hugging Face, OpenAI/Gemini APIs
Tools: Docker, Git, Playwright, Postman, Grafana, Prometheus, SonarQube


πŸ’Ό Experience

Software Engineer I β€” Brain Station 23 PLC (Mar 2024 – Present)

  • Built SaaS apps with NestJS, React, React Native, TypeScript
  • Automated lead generation from WhatsApp with Gemini Vision AI, Deepgram & OCR pipelines
  • Developed customizable chatbots with vector search & JWT-secured APIs
  • Improved app performance & testing with React Query and Playwright

🌟 Featured Projects

  • Quiet Lawn (NestJS + Gemini AI) β†’ AI-powered workflow automation with semantic search & role-based access
  • JS-SBU (Next.js + Payload CMS) β†’ Website builder platform with drag-and-drop, rich text editor & SEO optimization
  • Customizable Chat Widget (NestJS + GenAI) β†’ Chatbot widget with embeddings, JWT auth & branding support
  • Rehive (React + React Native) β†’ Scalable white-label fintech app, deployed on iOS, Android & Web
  • Automatic Lead Creator (NestJS + WhatsApp API) β†’ OCR + AI-powered business card/voice-to-lead automation

πŸ† Achievements

  • πŸ₯‡ AI Hackathon 2025 (Brain Station 23) β€” Built AI-driven intent-based product search with hybrid vector search & real-time monitoring
  • πŸ’‘ Solved 2000+ competitive programming problems on Codeforces, LeetCode, Atcoder & more
  • πŸŽ–οΈ Top 30 in CodeSamurai Hackathon 2022 among 500+ teams

🌐 Connect With Me


πŸ“Š GitHub Stats

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  1. Custom-Chatbot-BS23 Custom-Chatbot-BS23 Public

    A custom chatbot built with NestJS, MongoDB, PostgreSQL with pgvector extension for vector similarity search

    TypeScript

  2. RadioStation23 RadioStation23 Public

    A web application for streaming radio stations with a user-friendly dashboard.

    JavaScript

  3. ZPhotoEditor ZPhotoEditor Public

    Android Photo Editor App | This repository contains an Android PhotoEditor app developed in Java using Android Studio. The app allows users to select images from their device using the Dhaval image…

    Java 1

  4. AI-Image-generator AI-Image-generator Public

    This is an image generation tool that allows users to preview the top five generated images. Users can also download the images. The tool is built using DeepSeek Janus Pro 7B, along with Vite, Reac…

    TypeScript 1 1

  5. Invigilator-Management-System Invigilator-Management-System Public

    it is my 3-2 semester project i did , using django to build an invigilator management system. **Faeatures invigilator will recieve and email before the each exam invigilator can see the routine of …

    Python