90 Days Before 2027: Practical DE Switch Plan with Pranjal Patidar

A free, practical 90-day workbook for working professionals preparing to switch into Data Engineering.

This is not another list of tools to learn. It gives you a focused execution plan for turning roughly 200 hours into demonstrable work, interview practice, and targeted applications.

Inside the guide:

• A method for analysing 15 job descriptions and choosing your target stack
• A week-by-week plan for October, November, and December
• One realistic daily revenue-pipeline project to build throughout the 90 days
• SQL, Python, orchestration, and optional PySpark milestones
• Production-style tests for duplicate inputs, late refunds, corrections, and failed tasks
• A practical application plan beginning between Days 30 and 45
• Interview questions, mock-practice structure, and useful AI prompts
• Application trackers, weekly reviews, and a Day-90 evidence scorecard
• Busy-week alternatives for continuing when work or life gets difficult

The objective is not to guarantee a job in 90 days. It is to help you enter January with a project you understand, evidence you can demonstrate, interview stories you can explain, and an active application pipeline.

Created by Pranjal Patidar, Senior Data Engineer and creator of Data with Pranjal and The Data Foundry.