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Software Design Specification - Introduction

1. Introduction​

1.1 Purpose​

This Software Design Specification (SDS) describes the technical design of the Stock Screening Platform. It provides detailed information about:

  • System architecture and component interactions
  • Database schema and data models
  • API design and interface specifications
  • Data processing pipelines
  • Security mechanisms
  • Performance optimization strategies

Audience: Software architects, senior developers, DevOps engineers, and technical stakeholders.

1.2 Scope​

This document covers the design of all major subsystems:

  • Frontend: React-based Single Page Application (SPA)
  • Backend API: FastAPI REST API server
  • Database: PostgreSQL with TimescaleDB extension
  • Data Pipeline: Apache Airflow orchestration
  • Infrastructure: Docker containerization and deployment

1.3 Design Goals​

  1. Scalability: Support 10,000+ concurrent users with horizontal scaling
  2. Performance: Sub-500ms query response times for screening operations
  3. Reliability: 99.9% uptime with automated failover
  4. Maintainability: Clean architecture with separation of concerns
  5. Security: Defense-in-depth with multiple security layers

1.4 References​