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Jonathan Watkins

@jonathanwatkins

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Senior AI Engineer specializing in HIPAA-compliant LLM systems and RAG full-stack solutions.

United States

Message

What I'm looking for

I want to build secure, cost-efficient LLM and RAG systems—especially in healthcare—optimizing performance, governance, and compliance while partnering cross-functionally to ship scalable full-stack products.

I’m a Senior AI Engineer with 10+ years architecting scalable, HIPAA-compliant healthcare and data-driven platforms. I deliver AI-powered solutions across Azure and AWS, with a strong focus on LLM systems, RAG pipelines, and secure data handling.

Most recently, I built a HIPAA-compliant healthcare AI platform on Azure and reduced patient onboarding time by 40%. I directed multi-agent AI workflows for clinical reasoning, triage, and patient interaction, refined RAG pipelines for semantic search across EHRs, and implemented Microsoft Purview for data governance, classification, and policy enforcement—cutting cloud costs by 20% through prompt optimization, caching, and efficient LLM routing.

Earlier, at Castle Biosciences, I designed HIPAA-compliant AI solutions using AWS Bedrock, SageMaker, and Lex, including a hybrid semantic search platform that improved clinical data retrieval speed by 30%. Before that, as a Lead Full Stack Engineer and Software Engineer, I shipped scalable full-stack applications and high-throughput streaming platforms using React, Node.js, and Python, improving operational efficiency, retrieval efficiency, and deployment reliability.

Experience

Work history, roles, and key accomplishments

Senior AI Engineer

Stack Era

May 2024 - Mar 2026 (1 year 10 months)

Architected a HIPAA-compliant healthcare AI platform on Azure, reducing patient onboarding time by 40%. Reduced cloud costs by 20% through prompt optimization, intelligent caching, and efficient LLM routing while improving RAG semantic search and maintaining compliance with Microsoft Purview.

Azure AI Foundry Azure OpenAI Retrieval Augmented Generation (RAG)Prompt Engineering Microsoft Purview HIPAA compliance Cost Optimization Semantic Search

AI Engineer

Castle Biosciences

Mar 2022 - Feb 2024 (1 year 11 months)

Designed HIPAA-compliant AI solutions using AWS Bedrock, SageMaker, and Lex for advanced patient data analysis. Built a hybrid semantic search platform with OpenSearch (+30% retrieval speed) and automated backend workflows with Lambda and Step Functions, increasing operational efficiency by 25% and accelerating patient onboarding by 40%.

Amazon SageMaker Amazon Lex OpenSearch Semantic Search AWS Lambda AWS Step Functions HIPAA compliance Workflow Automation

Lead Full Stack Engineer

RealtySouth

Feb 2019 - Jan 2022 (2 years 11 months)

Led full-stack development to improve backend APIs and modern frontend interfaces for real estate operations. Designed scalable AWS/Azure solutions for document management and workflow automation, reducing manual effort by 50%, and built an internal document search platform (+30% retrieval efficiency) plus real-time data pipelines for time-sensitive legal workflows.

Full Stack Developer REST APIs React AWS Azure Workflow Automation Data Pipelines Data Processing

Software Engineer

CrewSouth

Sep 2016 - Jan 2019 (2 years 4 months)

Developed high-throughput livestreaming platforms using React, Node.js, and Python (FastAPI/Django) with low-latency delivery. Implemented RTMP/HLS streaming and AWS video services (MediaLive, MediaPackage, CloudFront), built backend infrastructure on AWS, and improved CDN performance; also established CI/CD pipelines to increase deployment speed and reliability.