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Steven DeJesusSD
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Steven DeJesus

@stevendejesus

Lead AI/ML Engineer at Microsoft who designed an agentic healthcare assistant with multi-agent orchestration and hybrid RAG.

United States
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At Microsoft Corporation, I designed and implemented an end-to-end GenAI assistant for clinicians, combining Azure OpenAI with agentic features. I built its multi-agent architecture and hybrid retrieval pipeline using FAISS and Neo4j.

I also implemented Model Context Protocol servers that connected FHIR APIs, CosmosDB, and Neo4j for secure healthcare data access. The assistant supports speech and image inputs, and I fine-tuned task-specific models for summarization, lab explanations, and symptom-to-condition mapping.

At Nike, Inc., I built demand forecasting and real-time recommendation systems, including a visual product similarity search pipeline that achieved sub-100ms search latency and improved CTR through A/B testing. Earlier, at Urbint, I developed AI systems for safety risk prediction and infrastructure damage detection; at Amazon, I built a Python tool that reduced manual product-listing QA by 70%.

Experience

Work history, roles, and key accomplishments

Microsoft Corporation logoMC

Lead AI/ML Engineer

Sep 2022 - Oct 2026 (4 years 1 month)

Designed and implemented an end-to-end GenAI assistant with Agentic AI features for clinicians using GPT (Azure OpenAI) and fine-tuned models. Built multi-agent architecture and hybrid RAG pipelines, and implemented MLOps pipelines for customer churn prediction.

Amazon logoAM

Python Developer

May 2014 - Jul 2015 (1 year 2 months)

Built a Python tool to validate and flag issues in 10M+ product listings using Pandas, Boto3, and internal APIs. Developed a Flask dashboard and automated daily reporting, reducing manual QA by 70%.

Education

Degrees, certifications, and relevant coursework

University of California, Berkeley logoUB

University of California, Berkeley

Master's Degree

Master's degree from the University of California, Berkeley, completed in 2014.

University of California, Berkeley logoUB

University of California, Berkeley

Bachelor's Degree

Bachelor's degree from the University of California, Berkeley, completed in April 2012.

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