AdvancedTechnical
5 min
Scaling a Monolith to Microservices
MonolithMicroservicesMigration
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Interview Question
You are tasked with breaking a large monolith into microservices. Walk through your migration strategy.
Key Points to Cover
- Identify bounded contexts and carve out services incrementally
- Introduce API gateway and service contracts
- Use strangler fig pattern to phase migration
- Ensure observability and data migration strategies
Evaluation Rubric
Defines service boundaries effectively30% weight
Uses migration patterns like strangler fig30% weight
Mitigates migration risks20% weight
Maintains observability during migration20% weight
Hints
- 💡Focus on incremental migration and risk reduction.
Common Pitfalls to Avoid
- ⚠️Lack of clear domain understanding leading to incorrect bounded context identification.
- ⚠️Trying to migrate too much at once (big bang rewrite risk).
- ⚠️Underestimating the complexity of inter-service communication and distributed transactions.
- ⚠️Neglecting to establish proper observability and monitoring from the outset.
- ⚠️Ignoring the impact on development teams and organizational structure.
Potential Follow-up Questions
- ❓How do you handle shared database challenges?
- ❓What are common pitfalls in migration?
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