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Stevil Lee

@stevillee

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Senior AI full‑stack engineer building scalable, production-ready web and AI systems.

United States

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What I'm looking for

I seek senior engineering roles building scalable, secure AI-enabled web platforms with strong CI/CD, team mentorship, and opportunities to integrate ML/LLM into production.

I am a Senior Full Stack Engineer with 10 years of experience building scalable, AI-powered web applications using React, Next.js, Node.js, FastAPI, and Django. I have delivered high-impact systems across healthcare, finance, energy, retail, and legal tech—engineering solutions like Pfizer’s AI Health Assistant, migrating monoliths to microfrontends, and reducing infrastructure costs while improving performance.

I focus on reliable, secure, and performant architectures—designing HIPAA- and SOC2-compliant systems, real-time data pipelines, and serverless event-driven platforms. I mentor engineers, drive CI/CD and testing standards, and integrate ML/LLM workflows to translate models into user-facing, production-quality features.

Experience

Work history, roles, and key accomplishments

Senior AI Fullstack Engineer

Work & Co

Aug 2022 - Jan 2025 (2 years 5 months)

Built and scaled AI-powered health and retail platforms using Next.js, React, Node.js, FastAPI and Django serving tens of thousands of users daily with sub-second response times; engineered Pfizer's AI Health Assistant integrating OpenAI and LangChain for real-time insights.

React Next.js Node fastAPI Django TypeScript OpenAI Lang Chain AWS Lambda SQL AWS Python JavaScript Kubernetes Ruby on Rails PHP API Design API Integration API Gateway Third Party Integrations TailwindCSS Vercel Excel

Lead Developer

Raisa Energy LLC

Jan 2020 - Jun 2022 (2 years 5 months)

Migrated legacy apps to React/Next.js/TypeScript and modernized financial analytics, engineered AI-powered finance modules and real-time energy data pipelines increasing refresh frequency to every 15 seconds and reducing tool latency by 30%.

React Next.js TypeScript fastAPI ETL MongoDB PostgreSQL WebSockets

Senior Full Stack Engineer

Invitae

Mar 2018 - Jan 2020 (1 year 10 months)

Designed and built HIPAA-compliant React front-ends and Django backends for real-time health data analytics, created ETL workflows and optimized distributed systems for scalable patient data management.

React Django Python ETL REST Multithreading Data & Analytics AWS

Full Stack Engineer

Trust & Will

Oct 2016 - Mar 2018 (1 year 5 months)

Developed estate planning apps enabling online will/trust creation for ~50,000 users, built WCAG-compliant UIs and secure RESTful APIs with Node.js/TypeScript and PostgreSQL, and automated workflows with AWS Lambda to cut manual steps 60%.

React Redux Next.js Node TypeScript PostgreSQL Stripe AWS Lambda

Junior UI Engineer

ClassDojo

Sep 2014 - Aug 2016 (1 year 11 months)

Contributed to React-based classroom engagement platform, optimized interactive features and AJAX calls to reduce page reloads by 80% and improved data retrieval via MySQL query tuning.

React JavaScript HTML5 CSS3 AJAX MySQL Performance Optimization