Writings & Notes

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Database Engineering· Jul 19, 2022

The Stored Procedure Debate: Why I Still Use Them

For complex financial workflows in high-throughput systems, stored procedures remain the most reliable tool I have.

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Engineering Philosophy· Jun 13, 2022

Read the Source Code

The documentation tells you what to do. The source code tells you what is actually happening.

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AI & Machine Learning· May 17, 2022

Feature Engineering Is 80% of Your Model Quality

The algorithm gets the credit. The features do the work.

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Fintech· Apr 11, 2022

PCI-DSS Is Not a Checkbox. It Is a Discipline.

Passing a PCI-DSS audit does not mean your system is secure. It means it was secure when audited.

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PHP Development· Mar 10, 2022

PHP Is Not Dead. It Is Evolving Faster Than Its Critics.

PHP 8+ is a different language from PHP 5. On why PHP remains the most pragmatic backend language for production shipping.

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Database Engineering· Feb 28, 2022

The 60-Second Query That Changed a Business

A loan summary query took 60 seconds for two years. After a schema redesign and two indexes, it ran in 4 seconds.

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Fintech· Jan 17, 2022

Building Multi-Currency Systems That Do Not Lie

Currency arithmetic in floating point is broken. Here is how to build currency systems that are always correct.

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Fintech· Nov 29, 2021

Idempotency Is Not Optional in Payment Systems

Your payment API will receive duplicate requests. Idempotency is what makes the second request harmless.

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Engineering Philosophy· Aug 12, 2021

The Hidden Cost of Not Writing Tests

Every hour you skip tests, you are taking out a loan at compound interest.