Ab Tiwari

I’m a Software Engineer with hands-on experience supporting TB-scale cloud data migration (Azure to AWS) and building full-stack web applications using Python, Django, and SQL. I enjoy turning complex workflows into reliable, production-ready systems with a strong problem-solving foundation.

In my current role, I migrated TB-scale datasets from Azure to AWS Data Lake using Airflow DAGs for pipeline orchestration, helping drive an enterprise-wide cloud transition. I built and optimized transformation DAGs that improved data quality by 35% and reduced data inconsistencies, while also validating and reconciling migrated datasets to ensure accuracy and integrity. I also reduced migration timelines by 15–20% by streamlining transformation workflows and DAG scheduling.

I balance engineering depth with product thinking—evident in a campus management web app used by 60+ students and faculty for attendance, academic resource access, and assignment management. I also built a Python NLP movie recommender system using cosine similarity and bag-of-words, achieving a precision score of 0.78 and improving recommendation accuracy by 20% through stemming, tokenization, and feature engineering. Beyond work, I’ve solved 360+ data structures and algorithms problems on LeetCode and earned strong CodeChef rankings, including being a 2-Star Programmer.