Overview
A microservice architecture can still become tightly coupled through maintenance. In a Spring Boot environment, services contained files that were nearly identical except for service-specific names or settings.
Those files had no reliable source of truth.
The problem
When shared dependencies, security settings, build rules, or framework configuration changed, every service required individual attention. Frequently modified services stayed relatively current. Rarely modified services could fall significantly behind.
The normal developer workflow became:
- Avoid touching shared files until necessary.
- Find another service that currently builds.
- Copy that service’s files.
- Modify service-specific values.
- Hope that the source service was current.
This produced dependency drift, inconsistent build behavior, expensive shared updates, and uncertainty about which service represented the correct configuration.
Why copied configuration was failing
Copying solved the immediate build problem without creating ownership or a source of truth. Every copied service became another independent version of shared platform policy.
The longer a service went without active development, the larger its eventual dependency, framework, and security migration became.
My role
I designed and implemented the hierarchical Maven parent POMs and reusable Git templates, created repeatable update paths, and migrated existing services to the shared foundation.
Maven parent POM design
I created a hierarchical Maven parent POM structure supporting multiple service patterns.
The shared parents centralized dependency and build configuration while allowing service patterns to retain the configuration they required. This reduced duplicated declarations and provided a common foundation for dependency, framework, and security updates.
Reusable Git templates
POM files were not the only duplicated content. I created reusable Git templates for common non-POM files. Shared changes could be made once, then propagated immediately through a repeatable process when urgent or incorporated during each service’s next active change when not urgent.
This established a source of truth without turning every routine update into an immediate all-service migration.
Migration
Existing services required incremental migration because their configurations had already diverged. I planned and implemented those changes while preserving a workable path for active development.
Operational effect
The platform changed maintenance from repeated service-by-service reconstruction into a managed update process. It reduced dependency and configuration drift and made shared maintenance easier to apply consistently.
What this demonstrates
- Platform engineering
- Build-system architecture
- Developer tooling and automation
- Migration planning
- Incremental migration without a forced all-service cutover
- Creating leverage from repeated work