Notas de Engenharia

Notas de desenvolvimento da equipe: fidelidade do backtesting, execução de ordens, precisão e os compromissos por trás de uma plataforma de trading automatizado. Escrito para desenvolvedores.

6Artigos

44 minTempo Total de Leitura

IntermediárioDificuldade

6 Things I'd Tell Myself Before Building a Trading Bot Platform

Notas de EngenhariaIntermediário

7 min de leitura

6 Things I'd Tell Myself Before Building a Trading Bot Platform

The engineering lessons from this series in one place: quiet failures, simulators that flatter you, precision as a domain, and constraints that delete work instead of adding it.

4 de ago. de 2026

Floating Point Will Cost You Money: Precision in Trading Systems

Notas de EngenhariaIntermediário

7 min de leitura

Floating Point Will Cost You Money: Precision in Trading Systems

Three exchanges, three incompatible minimum-order rules, and a bug caused by inventing a rule that one of them never had. What precision work actually looks like in production.

4 de ago. de 2026

Designing Non-Custodial Trading: API Key Scopes and Never Touching Withdrawals

Notas de EngenhariaIntermediário

8 min de leitura

Designing Non-Custodial Trading: API Key Scopes and Never Touching Withdrawals

Why we refuse API keys that carry withdrawal permission instead of just promising not to use it, and what that constraint removes from the system.

4 de ago. de 2026

Notas de EngenhariaIntermediário

6 min de leitura

The Mouse Wheel Is Quietly Editing Your Number Inputs

Two React traps that only hurt when the field holds money: the native number-input wheel footgun, and a portalled Radix popover that swallows every keystroke inside a dialog.

4 de ago. de 2026

Why Backtests Lie: Simulating Indicator-Based Exits Is Harder Than It Looks

Notas de EngenhariaIntermediário

8 min de leitura

Why Backtests Lie: Simulating Indicator-Based Exits Is Harder Than It Looks

Three ways a backtest quietly reports a better result than reality: reading a higher-timeframe indicator before its bar closed, letting an unfinished candle repaint a signal, and silently skipping conditions it cannot replay.

4 de ago. de 2026

What I Underestimated Building a No-Code Trading Bot Platform

Notas de EngenhariaIntermediário

8 min de leitura

What I Underestimated Building a No-Code Trading Bot Platform

Three engineering problems that turned out harder than expected: exchanges that fail quietly, floating point in order sizing, and designing around never holding user funds.

3 de ago. de 2026

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