StockTradePro - Portfolio Management Platform

Cloud-Native Microservices Financial Portfolio Management Application

Developed a comprehensive stock portfolio management platform using microservices architecture, enabling users to track investments, manage watchlists, receive real-time market updates, and analyze portfolio performance with advanced financial metrics. Built with containerized services deployed on Kubernetes for high scalability and reliability.

Key Features Implemented

Portfolio Management: Create, update, and track multiple investment portfolios with real-time calculations of gains/losses, performance metrics, and asset allocation
Stock Market Integration: Real-time stock data processing, market overview dashboards, advanced stock screening with filters, and comprehensive market analysis tools
Watchlist & Alerts: Customizable watchlists with price alerts, percentage-based notifications, and real-time stock monitoring
Transaction Management: Complete transaction history tracking, buy/sell order management, and detailed financial reporting
User Authentication: Secure JWT-based authentication system with role-based access control and session management
Real-time Notifications: In-app notification system with email/push notification preferences and market event alerts

Technical Architecture & Skills

Microservices Architecture

API Gateway Service: Ocelot-based routing, authentication, and load balancing across microservices
Portfolio Service: Independent microservice handling portfolio management and calculations
Stock Data Service: Dedicated service for market data processing and stock information
Notification Service: Autonomous service managing alerts, notifications, and user preferences
User Authentication Service: Centralized identity and access management microservice
Service Communication: Inter-service communication via HTTP APIs and RabbitMQ messaging

Frontend Technologies

Blazor Server: Component-based UI framework with server-side rendering
Bootstrap 5: Responsive design framework with custom CSS styling
SignalR: Real-time bi-directional communication for live market updates
JavaScript Interop: Custom JS integration for enhanced UI interactions

Backend Technologies

.NET 9 Web API: RESTful API architecture with clean separation of concerns
Entity Framework Core: Object-relational mapping with PostgreSQL database
Ocelot API Gateway: Centralized routing, authentication, and load balancing
PostgreSQL: Primary database for transaction and user data storage
Redis: Distributed caching layer for performance optimization
RabbitMQ: Message queuing system for asynchronous processing

DevOps & Infrastructure

Docker: Containerized microservices with multi-stage builds and optimized image layers
Kubernetes: Container orchestration with pods, services, deployments, and ingress controllers
Service Discovery: Kubernetes DNS for automatic service registration and discovery
Auto-scaling: Horizontal Pod Autoscaler (HPA) for dynamic scaling based on CPU/memory metrics
Rolling Deployments: Zero-downtime deployments with health checks and readiness probes
Container Registry: Docker image management, versioning, and security scanning
Infrastructure as Code: Kubernetes manifests (YAML) for declarative infrastructure management

Development Practices

Microservices Design Patterns: Domain-driven design with bounded contexts and service independence
Clean Architecture: Separation of business logic, data access, and presentation layers per service
Repository Pattern: Abstracted data access with dependency injection across microservices
API-First Development: OpenAPI/Swagger documentation for service contracts
Distributed System Patterns: Circuit breaker, retry policies, and fault tolerance mechanisms
Event-Driven Architecture: Asynchronous messaging between services using RabbitMQ
Mock Services: Comprehensive testing infrastructure with simulated data and service mocking
Responsive Design: Mobile-first approach with cross-platform compatibility
RESTful API Design: Standardized HTTP endpoints with proper status codes per microservice

Advanced Features

Financial Calculations: Portfolio valuation, P&L calculations, percentage gains/losses, and risk metrics
Data Visualization: Interactive charts and graphs for market trends and portfolio performance
Search & Filtering: Advanced stock screening with multiple criteria (sector, market cap, performance)
Pagination & Sorting: Efficient data handling for large datasets across distributed services
Security: Input validation, SQL injection prevention, and secure authentication flows
Distributed Caching: Redis implementation across microservices for improved performance
Service Resilience: Health checks, circuit breakers, and graceful degradation patterns
Load Balancing: Kubernetes-native load balancing with session affinity support

Business Impact

Built cloud-native microservices architecture supporting thousands of concurrent users with elastic scaling
Implemented real-time data processing across distributed services capable of handling market-speed updates
Created intuitive user experience reducing portfolio management complexity while maintaining system resilience
Designed fault-tolerant microservices with 99.9% uptime using Kubernetes orchestration
Achieved horizontal scalability through containerized deployment with auto-scaling policies
Reduced deployment time by 80% through automated CI/CD pipelines and rolling deployments
Implemented service isolation ensuring individual service failures don't cascade across the system

Technologies & Tools

Frontend: Blazor Server, HTML5, CSS3, Bootstrap 5, JavaScript, SignalR Client Backend: .NET 9, ASP.NET Core Web API, Entity Framework Core, Ocelot API Gateway Database: PostgreSQL, Redis (Distributed Caching) Messaging: RabbitMQ (Event-Driven Communication) Microservices: Domain-Driven Design, Service Mesh, API Gateway Pattern DevOps: Docker, Kubernetes, Helm Charts, Container Orchestration, CI/CD Pipelines Development: Visual Studio, Git, REST APIs, OpenAPI/Swagger, JSON, JWT Authentication Architecture: Microservices, Clean Architecture, Repository Pattern, Dependency Injection, Cloud-Native Design, Event-Driven Architecture

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