Debanjan Chakraborty 👋
Full-Stack Developer | Enterprise Solutions Architect
Proprietor, Incredible Informatics
👨💻 About Me
I architect and deliver production-ready enterprise applications with clean code, scalable architecture, and comprehensive documentation. Specializing in . NET Core ecosystem with focus on Blazor, Entity Framework, and complex business solutions.
💡 My Approach:
- 🏗️ Architecture-first: Repository patterns, service layers, SOLID principles, DI
- ⚡ Performance-driven: Optimize from day one—caching, query optimization, concurrency
- 📚 Documentation alongside code: Every feature ships with comprehensive guides
- 🔄 Cross-platform expertise: . NET, Android, multi-database systems
- 🎯 Production quality: Enterprise-grade code that scales and maintains easily
- 🔧 Problem-solver: Complex integrations, legacy system modernization, critical bug fixes
🚀 Featured Projects
Product Barcode Manager (PBM)
Enterprise inventory & barcode management system
Tech: ASP.NET Core Blazor Server • EF Core • SQL Server • Identity Framework
Technical Highlights:
- 🔐 Multi-level access control: Role-based + User-Godown + Voucher-type permissions with dynamic filtering
- 🌐 Globalization engine: Culture-aware formatting across 4 locales (en-IN, en-US, hi-IN, en-GB) with IIS integration
- 📁 Advanced file processing: Multi-format import/export (XLSX, XLS, CSV, TSV, TXT) with validation pipeline
- 📊 Complex reporting: Aggregated stock reports with opening/closing balances, transaction histories
- 🖨️ Hardware integration: Real-time barcode scanner support with duplicate detection
- 🎨 Modern UX: Dark-themed responsive UI, loading states, progress indicators, accessibility-first
Project Metrics:
- 📦 18 independent modules with clean separation of concerns
- 💻 15,000-20,000 lines of maintainable, documented code
- 🗄️ 9 database tables with optimized relationships and indexing
- 📖 9 technical guides: Setup, architecture, culture implementation, API references
- ⏱️ 4.2 months (part-time alongside other projects)
- 🎯 67 commits with disciplined 0.5 commits/day pattern
DbSync - Database Synchronization Tool
Multi-database real-time synchronization platform
Tech: ASP.NET Core Blazor • Entity Framework Core • Multi-DB Support
Technical Highlights:
- 🔄 Cross-database sync: SQLite ↔️ SQL Server ↔️ MySQL with dynamic schema introspection
- ⚙️ Incremental synchronization: Track last sync value for efficient delta updates
- 🏗️ Dynamic DbContext factory: Runtime provider selection and query execution
- ⏱️ Flexible scheduling: Manual, Interval, and Scheduled triggers with background jobs
- 📊 Execution monitoring: Comprehensive logging with performance tracking
- 🔍 Database explorer: Schema introspection across different database types
- 🎯 Field mapping engine: Source-to-destination column mapping with validation
MATA CN Tracking
Android consignment tracking application with multi-API integration
Tech: Android (Java) • Retrofit • OkHttp • SOAP • REST APIs
Technical Highlights:
- 🏁 Race-based API strategy: 3 APIs called simultaneously with first-response wins
- ⚙️ Multi-API integration: SOAP (legacy) + 2 REST APIs with atomic concurrency control
- 🐛 Critical fixes: OkHttp version conflict resolution, ArrayIndexOutOfBounds fixes
- 📱 Modern Android: SDK 36, Android 12+ support, Material Design dark mode
- 🔒 Network security: Cleartext traffic config, domain whitelisting
- 📤 Enhanced sharing: WhatsApp/Email integration with API source indicators
- 🎨 Adaptive UI: Dark mode support, colored status indicators, improved layouts
Payroll Management System
Enterprise-grade payroll & HR management
Complete employee lifecycle management with salary processing, attendance tracking, and compliance reporting.
Accounting Software (AccLead)
Full-featured accounting platform
Double-entry bookkeeping, GST compliance, financial reporting, and business intelligence.
Specialized Capabilities
- 🔄 Database Synchronization: Cross-platform sync engines, incremental updates, schema introspection
- 📦 File Processing: Excel manipulation (EPPlus, NPOI), CSV parsing, data transformation
- 🖨️ Barcode Systems: Scanner hardware integration, barcode generation/validation
- 📊 Advanced Reporting: Complex aggregations, data visualization, Excel exports
- 🌐 Globalization: Multi-culture support, i18n/l10n, culture-aware formatting
- 🔌 API Integration: REST, SOAP, multi-provider strategies, race conditions
- 📱 Android Development: Java, Retrofit, Material Design, background services
- ⚙️ Performance: Query optimization, caching (Memory, Distributed), concurrency control
Development Practices
✓ Clean Architecture ✓ SOLID Principles ✓ DRY/KISS
✓ Multi-platform Development ✓ Git Flow
✓ Comprehensive Documentation ✓ Code Reviews
✓ Concurrency & Thread Safety ✓ Error Handling
✓ Cross-database Compatibility ✓ API Integration
🛠️ Technology Stack
C# / .NET |
Blazor |
ASP.NET Core |
Java |
Android |
SQL Server |
MySQL |
SQLite |
Git/GitHub |
Bootstrap 5 |
|
HTML5 |
CSS3 |
JavaScript |
Gradle |
IntelliJ/VS |
📊 By The Numbers
📊 Portfolio Metrics
Cumulative Achievements
Total Development Hours: 685-850 hours across 3 major projects Lines of Code Written: 35,000-40,000+ lines Platforms Mastered: Web (Blazor), Desktop (.NET), Mobile (Android) Databases Supported: SQL Server, MySQL, SQLite API Integrations: REST, SOAP, Multi-provider race strategies Documentation Created: 9+ comprehensive technical guides Architecture Patterns: Repository, Service Layer, Factory, Concurrency
🏆 Technical Achievements
Complex Problem Solving
✓ Multi-database synchronization with schema introspection
✓ Cross-platform data transfer (SQLite ↔️ MSSQL ↔️ MySQL)
✓ Race-based API integration with atomic concurrency
✓ OkHttp version conflict resolution in production
✓ Hardware integration (barcode scanners)
✓ Culture-aware formatting across 4 locales
✓ Dynamic DbContext factory for runtime provider selection
✓ Incremental sync with delta tracking
Architecture Excellence
✓ Enterprise patterns: Repository + Service Layer + DI
✓ Multi-project solutions with clean separation
✓ Thread-safe concurrent operations
✓ Background job scheduling systems
✓ Comprehensive error handling and logging
✓ Cross-database compatibility layers
✓ Production-ready deployment configurations
🏢 Incredible Informatics
Location:
Room No: 4A, 4th Floor, Todi Mansion
Opposite BSNL Head Office, near Poddar Court
1, Lu Shun Sarani, Teriti Bazar
Kolkata - 700073, West Bengal, India
Enterprise Solutions:
- 🌐 Web Applications: Scalable . NET Core & Blazor platforms
- 💼 Desktop Software: Windows applications with complex business logic
- 📱 Mobile Apps: Native Android development with API integration
- 🔧 ERP Systems: Custom enterprise resource planning solutions
- 📊 Inventory Management: Barcode systems, stock tracking, reporting
- 💰 Financial Software: Payroll, accounting, compliance systems
- 🔄 System Integration: Multi-database sync, API development, legacy modernization
- 🔌 Data Synchronization: Cross-platform real-time data sync solutions
📫 Let's Connect
💼 Available for:
- Enterprise application development
- . NET/Blazor architecture consulting
- Technical architecture reviews
- Complex system integrations
- Legacy system modernization
📊 GitHub Activity
Total Contributions • Consistent Delivery • Clean Code
67 commits • 4.2 months project • 18 modules
🏆 Language Distribution
🔥 Contribution Streak
📈 Activity Overview
