Last month I shared how I turned a side project into a SaaS. Today, I’m opening the hood and showing you the actual architecture, tech decisions, and lessons learned. 📋 Table of Contents I. Why I Built This II. High-Level Architecture III. Core Components Explained 1. RealMarketAPI (Entry Point) 2. Auth Service 3. RealMarketServices (The Brain) 4. Data Storage Strategy 5. Data Ingestion 6. RealMarketBots (Bonus Layer) IV. Tech Stack V. Biggest Challenges So Far VI. What’s Next VII. Final Words I. Why I Built This I got tired of: Paying $200–$800/month for APIs that go down during high volatility Inconsistent latency (especially WebSocket) Terrible historical data quality Vendors suddenly changing pricing or throttling indie developers So I decided to build my own — focused on reliability, transparency, and developer experience . II. High-Level Architecture Here’s the current system: III. Core Components Explained 1.…