The detailed guidance and illustrative examples below are in English. All example business records are fictional.
Where Spring fits
A Java business API with documented workflows and operational requirements.
When to choose another approach
A starter application is not a production-ready delivery. Data, permissions, deployment and recovery still need work.
Worked example and evidence
Fictional purchasing API: submit order → validate limit → authorize approver → record decision. Deliver the API contract, acceptance record and release/runbook together.
What you need to supply
Business rules, JDK/dependencies, data schema, roles, API consumers and runtime access.
What acceptance should demonstrate
Verify approval rules, invalid input, authorization, duplicate requests and restore/release instructions.
Running costs and responsibilities
Assign Java/Spring updates, hosting, database care, monitoring and incident response.
Technical scope to confirm
A modular monolith can keep one deployment while separating business concerns. Separate services add operating responsibilities.
A proposal should identify the systems and data, direction of sync, access feasibility, failure handling, named owners and included deliverables. Listing this technology does not imply a prebuilt connector, vendor partnership or included feature.
Do we need microservices?
Only when independent scaling, ownership or release boundaries justify them. Begin with a maintainable deployment that meets the actual workflow.