Engineering story
Evolving an API without disrupting partner teams
Reworked an API-changing proposal into a backward-compatible control path for a pricing experimentation platform.
Context and problem
A new experimentation capability needed more precise controls, but the first technical direction would have required partner teams to change their API integrations. That made the proposal costly to adopt and put the rollout at risk.
Responsibility and constraints
I owned the service-side design and worked through the interface tradeoffs with dependent teams, aiming to add the needed control without asking partners to change their existing contracts.
- Existing partners needed to keep working without an API migration.
- The design had to support incremental rollout and testing.
- The control path needed to be understandable for the teams operating the service.
Approach and technical decisions
I used partner feedback to revise the design around a backward-compatible service path. I documented the contract and rollout behavior, implemented the Java service changes, and broke delivery into smaller units that could be validated as the capability was introduced.
What changed
The revised design preserved existing partner integrations while enabling more targeted experimentation controls. It turned an initially rejected direction into a path teams could adopt without a coordinated API change.
What this demonstrates
Demonstrates API design judgment, cross-team communication, and a preference for changes that improve a platform without transferring unnecessary migration cost to its users.