Most SaaS products should not start as microservices. They should start as a well-structured monolith with clear module boundaries.
Phase 1 — MVP: Next.js/React UI, a solid Node.js API, one primary database, authentication, and basic CI.
Phase 2 — Traction: add caching, background jobs, staging parity, error tracking, and performance budgets.
Phase 3 — Growth: extract hot paths into services, introduce stronger observability, and formalize on-call.
Phase 4 — Scale: multi-region readiness, capacity planning, cost controls, and security reviews as first-class work.
The mistake is jumping phases. The goal is intentional investment. Hemant Consultancy Services helps SaaS teams time those investments with product reality.