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Overview
I’m John Jr, an Applied Mathematics and Software engineer with many years of experience.I hold a Master’s Degree (M.Sc.) in Computer Science, specializing in Operations Research, with a focus on Combinatorial Optimization and Optimization under uncertainty.
News
The Reflection on My First Year at Meta
Disclaimer : Everything here is just my personal opinion, and this text does not reflect any opinion of my employer. Also, feel free to disagree with me on anything here; again, this is just my personal opinion and reflects my experience. Before I talk ab
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Binary Search
One of the most fundamental algorithms that appears in interviews at big tech companies is Binary Search . Of course, nobody will ask you to implement binary search directly. However, as Jon Bentley cited in his famous book Programming Pearls , only a sma
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Builder Design Pattern and Cyclomatic Complexity Reduction
In this post, I will explain in detail how I used the builder design pattern together with the bit mask field technique to reduce complexity. As a result, I decreased the cyclomatic complexity from 24 to 0 and reduced development time from hours to minute
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Composition, Inheritance, and Liskov Substitution Principle
In software development, organizing our codebase in a way that is easy to maintain is always a good practice, and this idea is not new. Actually, I think this started in 1968 when the term software crisis was coined. Since then, we have developed many pri
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Improving legacy code: Using Task Queue to Speed Up a Crawler in an ETL Process
In this post, I will present how I improved an ETL process to be more than 4x faster using the same resources. While the old architecture used Python threads, the new one used task queue architecture to be more reliable and scalable. So, I will explain ho
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