Hi, I’m Nilesh 👋 I’m currently a Data Engineer at Atlassian and previously worked at JPMorgan Chase building large-scale Spark pipelines and real-time data systems. I have ~6 years of experience in: 1. Apache Spark & PySpark 2. Data Engineering interviews 3. DSA for product companies 4. System design 5. Resume & career guidance I’ve taken multiple interviews and gone through rigorous hiring loops myself (Amazon, Atlassian, SalesForce, Walmart, S&P Global 500 etc.), so I know exactly what companies look for. I also hold a patent in distributed Spark resource optimization, which gives me deep understanding of Spark internals and performance tuning. If you're trying to: 1. Switch to a product company 2. Crack data engineering interviews 3. Learn Spark/Delta properly 4. Improve your resume 5. Practice mock interviews I’d be happy to help 🙂 My style is very practical, honest, and friendly. I’ll tell you exactly what you need to improve and how to get there.