Why I Still Believe in Zero-Cost BFF Layers After 6 Months (And What Broke)

Short summary

After 6 months of production use, capa-bff (a zero-cost BFF framework for Spring Boot) delivers measurable wins: parallel API calls reduced latency from 230ms to 100ms with zero operational overhead. The sweet spot is small teams seeking API aggregation without spinning up new infrastructure. However, service discovery configuration becomes unwieldy beyond 10 services, and this limitation requires manual integration—exposing the framework's scale ceiling.

• •Parallel API aggregation cuts latency ~60% (230ms → 100ms) versus sequential calls
• •Drops into existing Spring Boot apps with single dependency; no new infrastructure needed
• •Service discovery config doesn't scale past 10+ services without custom integration work

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