Rohit Singh

Lead AI Scientist | Generative AI, RAG

Salary / Daily rate

Gurugram, Haryana, India

Freelance

Skills

PythonLLMs / Large language modelsAIAWSDeep LearningScrapingData EngineeringKerasFlaskAWS LambdaPower BIGitGitLabNumPypandasTensorFlowAzureETLscikit-learnPyTorchDjangoMongoDBGoogle Cloud PlatformMicrosoft SQL ServerDynamoDBAmazon EC2Amazon RedshiftTableauData ScienceGoogle BigQueryMicrosoft Azure Cosmos DBLinuxGitHubData AnalysisMachine Learning

Languages

English

About me

Intro

AI Lead with 5+ years specializing in Generative AI, LLMs, and RAG systems. Built multimodal document processors achieving 95% accuracy and personalized recommendation engines driving 30% engagement lift. Expert in end-to-end AI solutions from strategy to deployment using Python, AWS, and cutting-edge ML frameworks.

Links

Work experience

Lead AI Scientist

Stealth AI Startup

Jun 2024 - Present

2 years 5 months

1. Led the development of an Intelligent Document Processor implementing Multimodal RAG architecture with LlamaParser and GPT4-0, leveraging LLM as Judge for quality control and validation. Achieved 95% accuracy in processing various financial documents through dual-LLM architecture where secondary LLM acted as judge for output validation. Implemented custom evaluation metrics for automated assessment of extracted data quality, reducing manual processing time by 70% while maintaining high accuracy across invoices, bank statements, and regulatory documents. 2. Leading the development of a flagship AI assistant, contributing to a differentiated product offering that empowers and streamlined core operations and enhanced client engagement in financial domain, contributing to a differentiated product offering that strengthened market position and supported the company’s growth. 3. Built a multi-modal data extraction system leveraging LlamaParser and a vision-based LLM to parse 50,000+ monthly scanned policies, handwritten claims, and PDF endorsements. The pipeline combined visual layout understanding (tables, stamps, signatures) with advance prompting to achieve 93% field-level accuracy for structured extraction of policy terms, coverage limits, and claim histories.

Lead Data Scientist

Adventure India Journey Private Limited

Feb 2023 - Jul 2024

1 year 6 months

1. Designed and deployed a personalized hotel recommendation engine using AWS Personalize, integrating multi-source data (user clickstreams, interaction history, hotel descriptions, customer reviews, and Google Analytics user profiles). Trained a contextual recommendation model by combining behavioral, demographic, and content-based signals, then hosted the solution on AWS SageMaker for real-time inference. Automated daily batch predictions via cron jobs to trigger personalized trip suggestions and notifications for users’ upcoming travel plans, improving engagement by 30% and driving a 25% lift in booking intent across targeted campaigns. 2. Designed and deployed an advanced RAG system for personalized hotel discovery, integrating customer prompts with a semantic search engine trained on hotel embeddings (derived from descriptions, reviews, and amenities). The solution retrieves contextually relevant matches by comparing user queries against precomputed hotel embeddings stored in AWS OpenSearch, returning the top 5 recommendations ranked by similarity. Upon user selection, a conversational AI chatbot engages users in dynamic Q&A, providing granular details (e.g., pricing, policies, nearby attractions) and seamlessly redirecting to booking pages post-interaction.

Senior Consultant, Data Science & Engineering

alliantgroup

Oct 2021 - Mar 2023

1 year 6 months

Hyderabad, Telangana, India

1. Developed and deployed an attention-based LSTM model to optimize business development (BD) team strategies by analyzing historical conversational data between BD representatives and organizational leads. Trained on NLP-pre-processed transcripts, the model identifies patterns in successful negotiation tactics, objection handling, and lead conversion signals. The architecture integrates bidirectional LSTM layers with attention mechanisms to prioritize critical conversational segments (e.g., pricing discussions, timeline alignment) and predict optimal follow-up actions. 2. Developed and deployed a Personalized Customer Communication Engine leveraging a hybrid machine learning approach: first applying ensemble-based clustering to segment customer data, followed by classification models to predict best messaging channels. The solution was hosted on AWS SageMaker for scalable inference and configured with cron jobs to automate daily batch predictions. This end-to-end pipeline achieved 85% prediction accuracy and a balanced F1 score, driving measurable improvements in customer engagement and conversion rates across platforms including Epsilon, Attentive, and Snowflake.

My Next Film

Sep 2018 - Oct 2021

3 years 2 months

Delhi, India

Lead NLP Engineer

May 2019 - Oct 2021

2 years 6 months

Delhi, India

1. Built a movie script processing pipeline using SpaCy’s model to automatically extract structured elements (speakers, dialogues, scene transitions) from raw scripts. Integrated the NLP outputs with a Narration Room interface, built using MoviePy for scene visualization, Pillow for image processing, and FPDF for script PDF generation, enabling writers to annotate, edit, and preview scripts in a unified environment. 2. Architected full-fledged Narration room for scriptwriters and filmmakers using MoviePy, FPDF, pillow libraries. Also assigned suitable voices to all characters from a database that has 400+ voices from Google, Azure and Amazon Polly based on character's age, gender, priority and sentiment. Narration room is driving 50% of the company's revenue per year. 3. Deployed AI-Powered Sentiment Analysis & Payment Integration for SaaS Platform: Trained a seq2seq LSTM model on 50,000+ annotated dialogues to evaluate emotional and sentiment polarity (positive/neutral/negative) in screenplays, achieving 89% accuracy (F1-score).

NLP Developer

Sep 2018 - May 2019

9 months

New Delhi, Delhi, India


Education

Giani Zail Singh College of Engineering & Technology, Bathinda

Bachelor of Technology

2015 - 2019

5 years

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