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Shag0r/README.md

Hi, I'm Shagor Kumar Das 👋

Backend-Focused Software Engineer | .NET | Angular | SQL | Payment Systems | ERP

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👨‍💻 About Me

I build production-grade backend and full-stack systems using
C#, ASP.NET Core, Angular, SQL Server, Dapper, and EF Core, with a strong focus on:

  • 💳 Payment Systems & FinTech
  • 🏢 ERP & Enterprise Applications
  • ⚡ Database Performance Engineering
  • 🔐 Secure API Development
  • 🔄 Transactional Workflows
  • 📊 High-Volume Data Processing

🚀 What I Work On

  • 💳 Payment gateways, merchant platforms, settlement, reconciliation, and QR-based payments
  • 🔧 Backend APIs and enterprise workflows using ASP.NET Core
  • ⚡ SQL Server performance tuning, stored procedures, execution plans, and indexing
  • 🏢 ERP systems covering order management, inventory, procurement, HRMS, and distribution
  • 🅰️ Angular applications using standalone components, RxJS, interceptors, caching, AG Grid, and SignalR

📈 Selected Engineering Impact

  • ⚡ Improved a high-volume financial stored procedure from 56.8s → 0.34s (~167x faster)
  • ⏱️ Reduced attendance-processing time from 2+ hours → ~2 minutes
  • 🧠 Reduced large-data export memory usage from ~300 MB → ~5 MB
  • 🏢 Built ERP workflows supporting 100+ field users, 2,000+ dealers/customers, and 9 depots
  • 💳 Worked on payment workflows including Bangla QR, settlement, reconciliation, payment links, transaction hold/unhold, and merchant operations

🛠️ Tech Stack

Backend

Frontend

Database & Data Access

Architecture & Security

Tools

🧠 Core Engineering Strengths

Backend Development        ███████████████████
SQL / Database Engineering ███████████████████
Payment Systems            ██████████████████
ERP / Enterprise Systems   ██████████████████
Angular                    ███████████████
Performance Optimization   ██████████████████

Pinned Loading

  1. OpenCV-Face-Recognition-with-Haar-Cascade-and-k-NN OpenCV-Face-Recognition-with-Haar-Cascade-and-k-NN Public

    This program is a real-time face recognition system that uses OpenCV and k-Nearest Neighbors (k-NN) to detect and label faces from a webcam feed.

    Python 2

  2. MagicVlla MagicVlla Public

    C# 2

  3. Triphala Triphala Public

    A web based solution to provide agricultural information . And help with crops prediction according to weather and season

    PHP 2 1

  4. Rainfall-Prediction-model Rainfall-Prediction-model Public

    A Machine learning based model to predict the rain fall

    Jupyter Notebook 2