Ali Nasir

About Ali Nasir

Experienced Data Scientist with expertise in machine learning, statistical modeling, and…

Experience

1. Data Scientist

   PW (PhysicsWallah)

   Jun 2022 — Present · Bengaluru, IN

   Project: Personalized Test-series using Adaptive Learning: User-Engagement through ‘Infinite Practice’Impact: In The process of Launching personalized Ai based products by PW it is the first product to give personalized test questions to every user in ratios of Easy, medium and hard category depending upon his/her calculated knowledge using statistical modelling and engagement.oConceptualized state-of-art and innovative solutions, item response theory (IRT) to estimate the ability level of aperson based on their performance on a test using difficulty, discrimination, speed and guessing parameters. oFormulated an algorithm from scratch for the 3Parameter Logistic model (a statistical model) to fit parameterswith GPT-4 and optimized using Bayesian estimation to calculate knowledge parameters (θ)oCreated 2 APIs using FastAPI to return questions & optimized query to reduce latency from 40 secs to 530 ms.Impact: Automation of multi-class Classification from Manual tagging to cut down business cost and save hours. Project1- Automatic Tagging of Feedbacks by students into relevant issues: Pre-processed 818k Hinglishsentences; Vectorized using state-of-art LABSE Hinglish sentence transformers for optimal results; applied fine-tuning to XGBoost classification model to increase accuracy from 83 to 91% and achieved Recall value of 84%. Project2- Automatic bifurcation of SAARTHI Queries and Subjects: Performed EDA using classical NLP theory;Vectorized Hinglish sentences using TF-IDF for fast-processing; Comparative analysis between classical MLclassification models; Altered threshold of Logistic regression to meet business demand of >85% Recall value. oCreated a cronjob-script from scratch and deployed through Airflow to daily update the classified tags. oSimplified Multi-class to binary classification to decrease latency and prepared classification reports.

Education

• St.Pauls Higher Secondary School, Indore

  12th grade, PCM

  2008 — 2014

• Indian Institute of Technology, Bombay

  Master's degree, Geoinformatics and Natural resource engineering

• School of Planning and Architecture, Bhopal

  Bachelor's degree, City/Urban, Community and Regional Planning