Swapnika Vajrapu
Lead Machine Learning Engineer
Bengaluru,Karnataka
Overview
6
6
years of post-secondary education
6
6
years of professional experience
Work History
Lead ML Engineer, Dailyhunt (VerSe Innovation)
AI Lab - Leading NLP & Feed Intelligence tracks
09.2021 - Current
- End-to-end development of Comments Moderation system across 9 indic languages by building Character Level Language model & LSTM model; Achieved 87% Recall, 92% Precision for 2L comments daily
- Built Similar Articles Detection algorithm to refine user's feed through Word2Vec similarity score & NER match approach; Achieved 95% Recall, 76% Precision in English-Hindi languages for 4L articles weekly
- Leading a team of 6 including Senior, Junior & Associate ML Engineers
Data Scientist-II, Amazon
Retail Pricing - Led Price Error Detection team
08.2019 - 08.2021
- Spearheaded team in identifying customer-centric anomalous prices using NLP models on customer reviews/support (ongoing)
- Slashed 48k man-hours (Rs. 64 lac) annually by decreasing false alerts by 81% using Extreme Gradient Boosting model; Improved precision from 53% to 91% and recall to 96%
- Added size & color variants to detail pages of consumables category (206k products, 51% glance views) by developing ASIN social network & Siamese LSTM model achieving 93% F1 score
- Modeled price-demand elasticity curve using quantile regression to detect price outliers. Boosted recall by 120% and precision from 13% to 39%
Data Scientist-II, Amazon
Last Mile Operations
10.2017 - 07.2019
- Saved $135MM worldwide by decreasing WAPE of Service time (from parking to doorstep) prediction model from 48.12% to 40.57%
- Built package level demand prediction model for 22 lac worldwide packages daily; Achieved recall, precision of 96%, 91% in NA, EU regions by implementing 2-stage approach of Prediction of on-road transit time, Prediction of arrival probability using Logistic Regression model
Data Scientist, Crosslink
A 7-membered analytics startup; Client - Axis Bank
08.2014 - 06.2016
- Estimated nation-wide monthly Savings Deposits’ Balances at circle level by implementing Linear Regression model with 96% accuracy
Education
Post Graduate Diploma in Business Analytics -
IIM Calcutta, ISI Kolkata, IIT Kharagpur
06.2016 - 05.2018
B. Tech. in Chemical Engineering -
IIT Kharagpur
06.2010 - 05.2014
Timeline
Lead ML Engineer, Dailyhunt (VerSe Innovation)
AI Lab - Leading NLP & Feed Intelligence tracks
09.2021 - Current
Data Scientist-II, Amazon
Retail Pricing - Led Price Error Detection team
08.2019 - 08.2021
Data Scientist-II, Amazon
Last Mile Operations
10.2017 - 07.2019
Post Graduate Diploma in Business Analytics -
IIM Calcutta, ISI Kolkata, IIT Kharagpur
06.2016 - 05.2018
Data Scientist, Crosslink
A 7-membered analytics startup; Client - Axis Bank
08.2014 - 06.2016
B. Tech. in Chemical Engineering -
IIT Kharagpur
06.2010 - 05.2014
Summary
Lead Machine Learning Engineer with 6+ years of experience in machine learning. Defining product vision, strategy and roadmap by collaborating with product, tech, business teams to solve problems at large-scale. Actively hiring and mentoring data scientists. Passionate about peeling a complex business problem layer-by-layer to understand interconnected aspects and solving through mathematical equations.
Skills
Python, R, SAS, C, SQL
Hadoop (basics), Redshift, S3, ElasticSearch
Scikit-Learn, Scipy, Numpy, Pandas, Keras, TensorfFlow, PyTorch
Regression, Random Forests, SVM, Clustering, Time-Series, NLP, Neural Nets
Tableau, Kibana, Streamlit, Prodigy, Excel
Awards/Achievements
- Innovation Award, Amazon
Awarded for Price Error Detection model reducing volumes by 64% - Supernova Award, Amazon
Awarded for Service Time prediction model with saving $135MM - CBSE Merit Scholarship for securing Rank 205 in AIEEE-10
Data Science Competitions
- Ranked 2/238 in the national level Smart India Hackathon (PM Modi’s Digital India Initiative); Solution under live implementation by GOI & ICMR
- Ranked 34th globally, 4th nationally among 340 teams in international data science game by Microsoft & AXA
Social Volunteering
- Jagriti Yatra 2019: Selected among 4k entrants for 15-day, 8000 kms nation-wide entrepreneurial journey
Awards/Achievements
- Innovation Award, Amazon
Awarded for Price Error Detection model reducing volumes by 64% - Supernova Award, Amazon
Awarded for Service Time prediction model with saving $135MM - CBSE Merit Scholarship for securing Rank 205 in AIEEE-10
Data Science Competitions
- Ranked 2/238 in the national level Smart India Hackathon (PM Modi’s Digital India Initiative); Solution under live implementation by GOI & ICMR
- Ranked 34th globally, 4th nationally among 340 teams in international data science game by Microsoft & AXA
Social Volunteering
- Jagriti Yatra 2019: Selected among 4k entrants for 15-day, 8000 kms nation-wide entrepreneurial journey