Essays · Operations Intelligence, AI and Quant
Hossein Narimani — Writing
In-depth writing on quant system design, operational AI, SaaS architecture, custom AI agents and founder execution systems.
How Much Does It Cost to Build a Quant System? A Realistic Cost Model for Founders and Operators
Most pricing conversations about quant systems start in the wrong place. They treat strategy code, research, execution, and risk control as if they were one line item.[1][3]The better question is not “How much does a quant system cost?” It is: what system,...
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Two-Level Decision System: Separating Signal from Noise in Contextual Data
Most decision systems share one structural flaw: they process every incoming data point with equal weight. The system has no concept of which...
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Why Your Data Pipeline Fails in Production: Architecture Mistakes in Stateful Processing and Late-Arriving Data
Most data pipelines that fail in production don't have a technology problem. They have an architecture problem — built for an ideal world that...
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Look-Ahead Bias in Backtesting: How Future Data Silently Contaminates Your Strategy Test
If your strategy backtest is showing brilliant results, there's a good chance something is wrong. Not because the strategy is bad — but because...
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Building a Market Regime Detection System with Hidden Markov Models and Bayesian Filtering
Most trading strategies are designed with one implicit assumption: market behavior is static. A model gets optimized on historical data,...
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