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Oliver Lee

@oliverlee

Senior Full-Stack & AI Systems Engineer at Elastic who deployed an enterprise AI knowledge assistant and modernized cloud services.

United States

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At Elastic, I deployed an enterprise AI knowledge assistant using Next.js, Python, Node.js, the OpenAI API, and LangChain. Its RAG pipelines indexed private internal wikis and helped eliminate manual search delays.

I also modernized legacy C# platforms at Elastic, moving them to .NET Core 8 domain services in Docker and AWS Fargate. I replaced synchronous cross-service communication with Kafka and RabbitMQ event-driven pipelines.

At GitLab, I built full-stack features with React, TypeScript, and Node.js, optimized SQL Server and PostgreSQL databases, and automated delivery pipelines with GitHub Actions and Azure DevOps.

Earlier, I worked on web applications and automation at HashiCorp and Zapier, and supported interface updates at InVision. I’ve also mentored developers and facilitated Scrum planning and retrospectives at Elastic.

Experience

Work history, roles, and key accomplishments

Senior Full-Stack / AI Systems Engineer

Elastic

Jan 2024 - Sep 2026 (2 years 8 months)

Architected and deployed an enterprise-grade AI knowledge assistant using Next.js, Python, and Node.js, integrating OpenAI API with LangChain and RAG pipelines. Led cloud modernization, breaking down monolithic C# architectures into microservices with .NET Core 8 and AWS Fargate.

Full-Stack Cloud Engineer

GitLab

Mar 2022 - Dec 2023 (1 year 9 months)

Designed and implemented responsive full-stack features using TypeScript, React, and Node.js/Express. Executed database optimization initiatives and engineered multi-layered authentication and authorization pipelines with JWT and OAuth 2.0.

TypeScript React NodeJS Express SQL Server PostgreSQL Redis JWT OAuth .NET Identity GitHub Actions Azure DevOps xUnit NUnit Selenium Prometheus Grafana ELK Stack

Full-Stack Software Engineer

HashiCorp

Jun 2020 - Feb 2022 (1 year 8 months)

Maintained and expanded scalable user-facing web layers using React, TypeScript, and Python APIs. Standardized infrastructure deployments with Terraform and AWS CloudFormation, and refactored database models across MongoDB and PostgreSQL.

React TypeScript Python NodeJS Express Terraform CloudFormation MongoDB PostgreSQL Infrastructure as Code Error Handling REST APIs

Software Developer

Zapier

Sep 2019 - May 2020 (8 months)

Created interactive client dashboards using JavaScript, HTML5, and CSS3/SCSS, interfacing with RESTful APIs. Automated data entry tasks with Python and Node.js scripts, and validated system stability through Jest and cross-browser testing.

JavaScript HTML5 CSS SCSS REST APIs Python NodeJS Jest Cross Browser Testing Automation

Junior Web Developer

InVision

Jun 2018 - Aug 2019 (1 year 2 months)

Supported modular interface updates by writing semantic HTML, CSS, and JavaScript components. Participated in database query design and learned RESTful API consumption, while practicing Git version control and code review workflows.

HTML CSS JavaScript REST APIs Git Version Control Agile