MirahLabs Engineering Blog

Technical insights, tutorials, and architectures written by our design and backend engineers.

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Cloud Computing April 08, 2026

S3 Data Lakes: Partitioning, Parquet Format, and Athena Query Optimization

Querying raw JSON or CSV data in S3 data lakes is slow and expensive. Optimize your lake using hive-partitioning, Apache Parquet columnar storage, and AWS Athena.

⏱️ 20 min read Read Article
Artificial Intelligence April 03, 2026

Feature Engineering for Machine Learning: From Raw Data to Model-Ready Features

Feature engineering is the most impactful step in the ML pipeline. Learn how to handle missing data, encode categoricals, create interaction features, and use automated feature selection.

⏱️ 21 min read Read Article