Gabryel lessa - Back-end Developer Challenge#189
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GabryelLessa wants to merge 13 commits intodynamox-s-a:mainfrom
Open
Gabryel lessa - Back-end Developer Challenge#189GabryelLessa wants to merge 13 commits intodynamox-s-a:mainfrom
GabryelLessa wants to merge 13 commits intodynamox-s-a:mainfrom
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added 13 commits
March 4, 2026 21:17
- requirements.txt with fastapi, sqlalchemy, pydantic, pytest, locust - .env.example with default sqlite url - .gitignore
composite index on (series_id, timestamp) for faster range queries
bulk insert data points on create, composite index query on get_data_points
store, retrieve, delete, count, list, get_metrics _compute_metrics is a module-level function (no reason to be a method)
latency middleware logging requests > 350ms global exception handler to avoid leaking stack traces
unit tests mock the repo layer, integration tests use in-memory sqlite conftest wires up the async client with db override
two methods: linear regression and holt-winters double exponential smoothing
auto mode picks the best one based on holdout RMSE (last 20% of data)
falls back to pure numpy if statsmodels isn't available
added PredictRequest/PredictOut schemas, predict() on service,
POST /{id}/predict endpoint and unit tests
least_conn balancing, rate limiting (100r/s per IP), keepalive upstream docker-compose spins up nginx + api1/2/3 all sharing the same sqlite volume
3 user profiles: Writer, Reader, Cleanup SLO check on exit: p95 < 350ms and error rate < 1%
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