From Coder to Architect: Why Business Stage Matters More Than Technology Trends

This article challenges the conventional wisdom of choosing cutting-edge technologies for every project. Through TrainerOS, a fitness platform, the author demonstrates that the right architecture is the one that matches your business's current stage—not the most advanced one. By deliberately choosing a modular monolith over microservices for an MVP, the team built a scalable foundation that handled 5,000+ trainers at minimal cost, proving that thoughtful constraints and business-driven decisions outweigh architectural hype.