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week5/community-contributions/Personal Knowledge Worker/sameer-db/profile/Profile.md

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+# Sameer Raju Khadatkar
+
+**Quant AI/ML @ Wells Fargo | M.Tech. (CDS) @ IISc, Bangalore | B.Tech. (Mechanical) @ GCOE, Amravati**  
+📍 Hyderabad, Telangana, India  
+📧 sameer123khadatkar@gmail.com    
+🔗 [LinkedIn](https://www.linkedin.com/in/sameer-khadatkar/)
+
+---
+
+## Summary
+
+I currently serve as a Quantitative Analytics Specialist within Wells Fargo's Model Risk Management (MRM) team at India and Philippines. My primary responsibility involves validating AI/ML models, with a focus on fraud detection, as well as models used in marketing, credit scoring, and natural language processing (NLP). In this role, I ensure the conceptual soundness of models, conduct performance testing, conduct explainability analysis and rigorously challenge models by developing challenger models to detect weaknesses.
+
+Additionally, I ensure compliance with regulatory standards set by Wells Fargo, in alignment with guidelines from the Federal Reserve and the OCC. I work closely with model development and risk management teams, providing validation feedback and recommending improvements. I also contribute to documentation and reporting, preparing validation reports, and ensuring the ongoing monitoring of model performance.
+
+With a strong foundation in Machine Learning, Deep Learning, and High-Performance Computing gained during my graduate studies at the Indian Institute of Science, Bangalore, and a Bachelor's degree in Mechanical Engineering, I bring a unique blend of skills at the intersection of advanced technology and engineering. My expertise allows me to tackle complex challenges, drive innovation, and contribute to cutting-edge solutions in diverse industries.
+
+---
+
+## Professional Experience
+
+### Wells Fargo International Solutions Private Ltd  
+**Quantitative Analytics Specialist – AVP**  
+📍 Hyderabad, Telangana, India  
+📅 August 2022 – September 2023
+
+- Collaborating with a team overseeing an inventory of ∼300 models focused on Fraud Detection, primarily utilizing Logistic Regression, Extreme Gradient Boosting (XGBoost), and Neural Network models.
+- Conduct validation of AI/ML models by ensuring conceptual soundness, performing performance testing, carrying out explainability analysis, and developing surrogate, challenger, and offset models to uncover potential weaknesses.
+- Joined the team during its expansion in India, playing a key role in building trust with US stakeholders. Recognized with the **Manager’s Spotlight Award** for outstanding dedication and contributions.
+- Developing a module to assist Validators in benchmarking anomaly detection models (Isolation Forest, Extended Isolation Forest, Autoencoders, Histogram-Based Outlier Score (HBOS), etc.) and assessing them using clustering performance metrics.
+- Created a validation playbook for fraud detection vendor models and developed an Excel-based policy library to facilitate quick reference for team members.
+
+---
+
+## Highlighted Projects at Wells Fargo
+
+### ✅ Check Authorization Model | Validation
+
+- Validated a high-impact machine learning model for check authorization, ensuring compliance with regulatory and bank's MRM standards.
+- Reviewed model objectives, assumptions, architecture, and data pipeline.
+- Assessed performance using AUC, recall, KS statistic, and PSI across time.
+- Performed explainability analysis using multicollinearity checks, surrogate models (overall and segment level), SHAP, PDP, H-Statistic, 2D-PDPs, and sensitivity analysis.
+- Identified local weaknesses through segmentation and built offset models to detect missed signals.
+- Developed challenger models using YOLOv5, SigNet, TrOCR (Transformer-based OCR), XGBoost model, and pixel-based feature engineering.
+
+### 🧠 Word Embedding Explainability Research
+
+- Collaborated with the Bank’s Chief Model Risk Officer on a research project focused on the explainability of word embeddings using clustering techniques such as Spectral Clustering, HDBSCAN, and analysis of ReLU neural network activation patterns.
+- Utilized Sentence Transformer embeddings (SBERT) and applied dimensionality reduction methods including PCA, UMAP, and t-SNE for cluster interpretation and visualization.
+- Extended the research by developing a Mixture of Experts model leveraging XGBoost.
+
+---
+
+## Education
+
+**Indian Institute of Science (IISc), Bangalore**  
+📅 2020 – 2022  
+🎓 Master of Technology (M.Tech.), Computational and Data Sciences  
+📍 Bengaluru, Karnataka  
+**CGPA:** 9.1 / 10.0
+
+**Government College of Engineering, Amravati (GCoEA)**  
+📅 2015 – 2019  
+🎓 Bachelor of Technology (B.Tech.), Mechanical Engineering  
+📍 Amravati, Maharashtra  
+**CGPA:** 8.29 / 10.0
+
+---
+
+## Certifications
+
+- Advanced Data Science with IBM (Coursera)
+- HYPERMESH (SHELL MESH AND SOLID MESH)
+- Introduction to Big Data (Coursera)
+- MASTERCAM (Design, Turning and Milling)
+- CREO PARAMETRIC
+
+---
+
+## Research Publication
+
+**Subspace Recursive Fermi-Operator Expansion Strategies for Large-Scale DFT Eigenvalue Problems on HPC Architectures**  
+📝 Sameer Khadatkar, Phani Motamarri (MATRIX Lab)
+📅 July 20, 2023  
+📚 *Journal of Chemical Physics, 159, 031102 (2023)*  
+🔗 [Publication Link](https://pubs.aip.org/aip/jcp/article/159/3/031102/2903241/Subspace-recursive-Fermi-operator-expansion)
+
+- Implemented recursive Fermi-operator expansion methods on multi-node CPU (PARAM Pravega) and GPU (ORNL Summit) systems for large-scale DFT problems.
+- Applied mixed-precision strategies achieving 2× to 4× speedup over diagonalization.
+- Benchmarked using MPI and SLATE for distributed dense linear algebra.
+
+---
+
+## Academic, Independent and Other Projects
+
+- **LLM-Powered Multimodal Airline Chatbot**: Built a chatbot with GPT-4o-mini, supporting both text and voice, generating pop-art city images. Stack: Python, Gradio, custom tools.
+- **Future Stock Price Prediction for MAANG**: Used yfinance, Stateful LSTM vs XGBoost. LSTM outperformed with ~0.02 MAE.
+- **Duplicate Question Detection**: LSTM Siamese Network with Word2Vec and GloVe. GloVe performed better.
+- **Music Genre Classification**: Used MFCCs and spectral features. Best result: 76% ± 3% accuracy with SVM.
+- **Algorithm Implementation from Scratch**: PCA, LDA, GMM, TF-IDF, and backpropagation for DNNs.
+
+---
+
+## Skills
+
+**Knowledge Areas:**  
+Model Risk Management, Machine Learning, Deep Learning, High-Performance Computing
+
+**Programming Languages:**  
+Python, C, C++ (OpenMP, MPI, CUDA), SQL
+
+**Python Libraries & Tools:**  
+Numpy, Pandas, Scikit-Learn, PyTorch, TensorFlow (Keras), PySpark, Matplotlib
+
+---
+
+## Relevant Courses
+
+- Machine Learning for Signal Processing (IISc)
+- Advanced Data Science with IBM (Coursera)
+- Deep Learning (NPTEL)
+- Pattern Recognition and Neural Networks (NPTEL)
+- Numerical Linear Algebra (IISc)
+- Data Analysis and Visualization (IISc)
+- Numerical Solution of Differential Equations (IISc)
+- Parallel Programming (IISc)
+- Introduction to Big Data (Coursera)
+-  LLM Engineering: Master AI, Large Language Models & Agents (Udemy)
+
+---
+
+## Extracurricular Activities
+
+- **Project Associate** at MATRIX Lab, CDS Department, IISc.
+- **Teaching Assistant** for “DS284: Numerical Linear Algebra” at IISc.
+- Led suspension operations for SAE BAJA Team at GCoE Amravati.
+- Organized Annual Social Gathering as Joint Secretary at GCoE Amravati.
+
+---
+
+## Top Skills
+
+- Data Reporting
+- SQL
+- Microsoft Excel