
Hard technical lessons about indexing, schema design, transactions, scaling, and data integrity are explained clearly so you can build faster, safer, and more scalable systems. 10 Database Mistakes I Made Databases rarely fail dramatically. They degrade. Slow queries.Lock contention.Strange data inconsistencies.Scaling issues that appear “out of nowhere.” Most of these problems aren’t caused by the database engine.…

You don’t need a zero-day exploit to get hacked. Sometimes, one forgotten if statement is all it takes. Introduction: The Bug That Didn’t Look Dangerous It started as a tiny feature request.A user needed an API endpoint to export their data as a CSV file. Nothing complicated, just read from the database and send the file.…