Debarati Chatterjee
Bangalore
Summary
Professional Summary Experienced AI Engineer with a strong background in fine-tuning Large Language Models (LLMs), Small Language Models (SLMs), and developing Retrieval-Augmented Generation (RAG) applications using Azure AI Search. Proficient in leveraging LangChain and AutoGen Agentic Frameworks to create intelligent, persona-driven chat assistants for operational support. Skilled in designing and managing scalable backend APIs, ensuring seamless integration and efficient deployment across various platforms. Adept at delivering AI-powered solutions that enhance automation, decision-making, and user engagement.
Overview
8
8
years of professional experience
Work History
Specialist Engineer Generative AI
AT&T
Bengaluru
09.2023 - Current
- Developed a Gen AI chat assistant to reduce MTTI and MTTR for Production Support Engineers during triages.Implemented AutoGen and LangGraph multi-agent frameworks for dynamic issue resolution.Designed a RAG-based architecture integrating multiple data sources via Azure AI Search indexes.Used DSPy for prompt tuning and few-shot prompting to improve response accuracy.
- Built a persona-driven assistant capable of querying alerts, rules, and visualizing trends during peak events (e.g., Black Friday).Integrated Neo4j and NetworkX to implement Graph RAGs for relational insights.
- Designed an automated log analysis pipeline using NLP and unsupervised learning.Clustered logs with TF-IDF + KMeans for pattern recognition.Detected anomalies using Isolation Forest and OneClassSVM.Extracted semantic meaning using BERT, LogBERT, and OpenAI embeddings for RCA and LLM-based interpretation.Built HMM-based models to predict sequential faults from system logs.
Senior Research and Technology Engineer
Siemens Healthineers
Bengaluru
08.2022 - 09.2023
- Project 1: SAS to Databricks Migration
- Led the end-to-end migration of an application from SAS DI Studio to Azure Databricks for cost optimization.
- Developed a data migration plan, transformed Teradata tables to Blob, and implemented Delta Tables (Insert, Update, Merge logic).
- Built a custom logging framework using Python and automated workflows via Airflow.
- Worked with Azure Data Studio, Storage Explorer, and Key Vaults.
- Project 2: SmartUse Optimization in Databricks
- Optimized SmartUse data pipelines for APAC, EMEA, and US regions, reducing execution time by ~50% by replacing Blob writes with temporary views.
- Developed common notebooks for centralized configurations and streamlined connections to SAS, SQL Server, Teradata, and Blob.
Senior Associate
AT&T
Bengaluru
02.2021 - 08.2022
- Project 1: Data Ingestion with Palantir Foundry
- Ingested AT&T Field Operations Data from Azure, Vertica, Snowflake, and external sources, utilizing PySpark for transformations.
- Implemented incremental/full loads with delete-insert and update-insert logic and created raw syncs using pull slice.
- Worked with JSON and Parquet file formats.
- Project 2: Snapshot to Engineered Feed Conversion
- Migrated on-prem feeds to cloud, ensuring continuous data availability for AI-driven and BRD data pipelines using Palantir Foundry.
- Project 3: Data Integrity Check (POC)
- Developed a POC for Data Integrity Check by ingesting checksums alongside data, preventing corrupt data propagation in downstream transformations on Palantir Foundry.
Senior Systems Engineer
Infosys
Bengaluru
10.2017 - 02.2021
- Data Analysis and Integration of enterprise data Provided support on Data Warehouse activities which includes defect fixes and provided analysis to business problems Used Netezza, Oracle for Wholesale data maintenance using stored procedures.
- Analysis of Complex SQL Queries for optimization along with experience in use of User Defined Functions and Triggers
Education
M.Tech - Artificial Intelligence and Machine Learning
Bits Pilani
Bengaluru03.2025
B.Tech -
St Thomas College of Engineering & Technology
Kolkata06.2017
INTERMEDIATE SCHOOL CERTIFICATE -
M.P Birla Foundation Higher Secondary School
Kolkata03.2013
INDIAN CERTIFICATE FOR SECONDARY EDUCATION -
St Pauls Boarding & Day School
Kolkata03.2011
Skills
Languages: Python, Apache Spark
Agentic Frameworks: Autogen, Lanngraph
Deep Learning: Pytorch, Tensorflow
Mlops: Mlflow(Basic), DVC
Databases: MySQL,MongoDB, PostgresSQL,
Languages
English, Hindi, Bengali
Accomplishments
- Received AT&T connection award for continuous three years
LINKS
Timeline
Specialist Engineer Generative AI
AT&T
09.2023 - Current
Senior Research and Technology Engineer
Siemens Healthineers
08.2022 - 09.2023
Senior Associate
AT&T
02.2021 - 08.2022
Senior Systems Engineer
Infosys
10.2017 - 02.2021
M.Tech - Artificial Intelligence and Machine Learning
Bits Pilani
B.Tech -
St Thomas College of Engineering & Technology
INTERMEDIATE SCHOOL CERTIFICATE -
M.P Birla Foundation Higher Secondary School
INDIAN CERTIFICATE FOR SECONDARY EDUCATION -
St Pauls Boarding & Day School
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