Blogs
Why Scaling Up Couldn’t Fix My Slow Spark Job
Understanding why more executors didn’t help and what the Spark UI revealed about the real bottleneck I had a Spark job that refused to speed
The Small File Problem: Why 29,200 Files Nearly Broke My Spark Job
I filtered just one-third of a 400 million row table and expected the query to fly. Instead, it took 11 minutes just to scan the
How to Prepare for a Data Engineering Interview: A Practical Guide for Working Professionals
I speak with professionals preparing for Data Engineering interviews every single day. Whether they are trying to transition from Support, ETL testing, Mainframes, or Software
Why Professionals Choose TrendyTech for Data Engineering Training
Every week, I speak with working professionals who want to build a career in Data Engineering. Some are looking to transition from support, testing, software
How Sumit Mittal Has Helped Thousands of Working Professionals Become Successful Data Engineers
A few years ago, most professionals looking to transition into Data Engineering faced this common challenge. There was no clear roadmap. Some learned Hadoop while
Data Engineer Salary in India 2026: Complete Guide
The Truth About What Most IT Professionals Go Through If you’ve been working in IT for 2 to 8 years, you’ve probably noticed this pattern:
