Microservices vs Monolith: What I Learned Building a SaaS Platform

When I started building the SaaS School Management System at Wolkite University, I assumed microservices were always the right answer for scalability. I was wrong — and right at the same time.

The first challenge was data consistency. With services for students, grades, attendance, and billing all running independently, a simple "enroll student" operation required coordinating across three services. We solved this with saga patterns and compensating transactions.

The second insight was operational overhead. Monitoring, tracing, and debugging a distributed system requires infrastructure that a monolith simply doesn't demand.

But here's the payoff: when grade-reporting season hit and traffic spiked 10x, we scaled only that service. The billing service hummed along untouched. That selective elasticity is irreplaceable.

My takeaway: microservices are an organizational pattern as much as a technical one. Build them when your team and problem domain can absorb the complexity.