There's a trend in the tech industry to present microservices as the universal solution for all software problems. The reality is more nuanced: the right architecture depends on your team size, system complexity, and business objectives.
What is a Monolithic Architecture?
In a monolithic application, all system modules — authentication, business logic, data access, interface — are packaged and deployed as a single unit. It's the architecture most projects start with.
Monolith advantages: - Faster development in early stages - Easier to debug and trace errors - Simple deployment: a single artifact - Lower operational complexity
Disadvantages: - A single failure can bring down the entire system - Scaling means scaling everything, not just the component that needs it - Code grows until it becomes hard to maintain (the infamous "big ball of mud") - Large teams stepping on each other's toes in the same repository
What are Microservices?
Microservices divide the application into small, independent services, each with a single responsibility, its own database, and deployed autonomously. They communicate via APIs or asynchronous messaging.
Microservices advantages: - Independent scaling: if the payments module has high demand, you only scale that service - Resilience: if one service fails, the rest keep running - Autonomous teams: each team owns and deploys their service without coordinating with others - Technology freedom: each service can use the most suitable language or database
Disadvantages: - High operational complexity: you need orchestration (Kubernetes), service mesh, distributed observability - Network latency between services - Complex distributed transaction management - Requires a mature team with DevOps experience
When to Migrate to Microservices?
Consider migration when at least three of these conditions are met:
- Your development team exceeds 8–10 people
- Deployment time exceeds 2 hours
- Different modules have very different scaling requirements
- A small change in one module breaks functionality in others
- You have separate teams working on distinct business domains
The Strangler Fig Pattern: Migrate Without Rewriting Everything
You don't have to abandon the monolith overnight. The Strangler Fig pattern allows you to gradually extract functionalities from the monolith into microservices while the monolith keeps running. It's the lowest-risk strategy for production systems.
Our Recommendation
If your system is less than 2 years old and your team has fewer than 10 developers, start with a well-structured monolith (modular monolith). It's faster, cheaper, and will let you validate the business before investing in complex infrastructure.
At Datandina we evaluate your current architecture and recommend the most suitable path for your goals. Contact us for a free review.