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Sagnik Chakraborty

@sagnikchakraborty

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LLM and ML Engineer specializing in RAG systems, document intelligence, and production NLP pipelines.

India

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What I'm looking for

I’m looking for a role where I can build production LLM/NLP systems—especially RAG and document intelligence pipelines—working with hybrid search, strong ML engineering practices, and teams that value reliable deployment and measurable accuracy.

I’m an LLM and ML Engineer with 1+ year of production experience building document intelligence pipelines, RAG systems, and Transformer-based NLP models for financial and compliance applications. I’ve delivered systems securing 250,000+ records, supporting 15+ institution formats, and reaching 98% entity recognition accuracy.

I also lead small engineering teams and move ML solutions from prototype to production—covering PII masking with redaction/substitution/synthetic data generation, hybrid retrieval (BM25 + LLM re-ranking), and end-to-end Transformer fine-tuning. My focus is on reliable architectures that reduce reconciliation time and accelerate onboarding.

Experience

Work history, roles, and key accomplishments

Current

LLM and ML Engineer

Current

Quantyc.ai

Feb 2025 - Present (1 year 4 months)

Built a RAG-powered bank statement parsing system using LLMs, standardizing 15+ Indonesian institution formats into 4 types and cutting client onboarding time by 60%. Led a team to deliver an enterprise PII masking pipeline securing 250,000+ records and achieving 98% entity recognition accuracy.

RAG Microsoft Presidio PII Masking Synthetic Data Generation

Backend Developer Intern

Kartexa

Jul 2023 - Jan 2024 (6 months)

Contributed to REST API development for a job portal using Django REST Framework, including authentication, profile management, and role-based access control. Supported job listing and search APIs with filtering and pagination, plus admin dashboard endpoints for oversight, moderation, and application tracking.

Django REST Framework REST APIs Authentication Role Based Access Control Filtering And Pagination Python SQL