Jakub Polec

Jakub Polec

Founder of Quant Journey, AI Infra

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Maker History

  • QuantJourney Backtester
    QuantJourney BacktesterOpen-source Python engine for defensible portfolio research
    Jul 2026
  • QuantJourney
    QuantJourneyNever Lose a High-Conviction Investment Idea Again
    Feb 2026
  • 🎉
    Joined Product HuntMay 14th, 2025

Forums

21h ago

QuantJourney Backtester - Open-source Python engine for defensible portfolio research

An open-source Python backtesting engine built for reproducible portfolio research—not just equity curves. Trace signals into weights, orders, fills, cash, positions and performance. Use fast vectorized research or order-aware simulation, with transaction costs, walk-forward testing, 80+ metrics, 25+ charts and 50 strategy examples. Runs locally; optional managed market data is available through the QJ API.

5mo ago

QuantJourney - Never Lose a High-Conviction Investment Idea Again

The Future of Quantitative Trading for Mid-Market Firms. QuantJourney empowers hedge funds, family offices, and proprietary trading firms with institutional-grade quant infrastructure, AI-driven backtesting, and multi-asset support.
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