EquiSight
Data ScienceChallenge: ran an A/B test across 50+ equities (ARIMA vs. gradient-boosted forecasting), cutting RMSE 18% at p < 0.05, then served it through a Flask/FastAPI + PostgreSQL backend and a React/Plotly dashboard — cutting API response time 57% (2.3s to 1s) at 99.9% uptime.