Challenge
Rinha de Backend 2026 scores implementations by latency, correctness, and request survival under the official k6 workload.
Required endpoints:
| Method | Path | Role |
|---|---|---|
GET | /ready | readiness probe |
POST | /fraud-score | fraud decision |
Default topology:
- entrypoint/load balancer on
9999 - two API instances
- total container budget:
1.00 CPU / 350 MB - no privileged container
- runnable through Docker Compose
Ranking pressure:
- lower p99 improves p99 score
- 0% failures preserves detection score
- HTTP errors destroy score quickly
This repository currently keeps transport errors and classification errors at
0 in clean CI candidate runs. Remaining ranking work is p99 reduction without
giving back correctness.