Hi, I'm Elijah Nevel, a Senior Full-Stack and LLM Engineer with over 10 years of experience building scalable web platforms using technologies like Java, Spring Boot, React, and AWS. I love architecting efficient backend systems and creating modern, user-friendly front-end applications. Recently, I've been focused on integrating Large Language Models and AI features into products, using tools like OpenAI, LangChain, and vector databases to deliver smarter solutions that enhance user experiences. I'm passionate about working collaboratively in Agile environments and enjoy solving complex technical challenges. Whether it's optimizing performance, developing reusable UI components, or designing knowledge retrieval systems powered by AI, I strive to deliver impactful products that reach millions of users. I'm always eager to learn, innovate, and contribute to exciting projects in the full-stack and AI space.

Hi, I'm Elijah Nevel, a Senior Full-Stack and LLM Engineer with over 10 years of experience building scalable web platforms using technologies like Java, Spring Boot, React, and AWS. I love architecting efficient backend systems and creating modern, user-friendly front-end applications. Recently, I've been focused on integrating Large Language Models and AI features into products, using tools like OpenAI, LangChain, and vector databases to deliver smarter solutions that enhance user experiences. I'm passionate about working collaboratively in Agile environments and enjoy solving complex technical challenges. Whether it's optimizing performance, developing reusable UI components, or designing knowledge retrieval systems powered by AI, I strive to deliver impactful products that reach millions of users. I'm always eager to learn, innovate, and contribute to exciting projects in the full-stack and AI space.

Available to hire

Hi, I’m Elijah Nevel, a Senior Full-Stack and LLM Engineer with over 10 years of experience building scalable web platforms using technologies like Java, Spring Boot, React, and AWS. I love architecting efficient backend systems and creating modern, user-friendly front-end applications. Recently, I’ve been focused on integrating Large Language Models and AI features into products, using tools like OpenAI, LangChain, and vector databases to deliver smarter solutions that enhance user experiences.

I’m passionate about working collaboratively in Agile environments and enjoy solving complex technical challenges. Whether it’s optimizing performance, developing reusable UI components, or designing knowledge retrieval systems powered by AI, I strive to deliver impactful products that reach millions of users. I’m always eager to learn, innovate, and contribute to exciting projects in the full-stack and AI space.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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Language

English
Fluent

Work Experience

Senior LLM / Full-Stack Engineer at Samsung Research America
January 1, 2023 - Present
Built analytics dashboard with React, Express, and Highcharts to visualize device telemetry data from 100K+ endpoints. Developed scalable Java Spring Boot APIs for WS integrations with optimized caching and security. Designed and deployed LLM-enabled knowledge retrieval system using OpenAI, LangChain, and Pinecone, reducing manual lookup time by 95%. Integrated React front-end with context-aware chat UI powered by RAG pipeline, improving customer support automation by 40%.
Senior Full-Stack Engineer at Twitter
December 31, 2022 - July 31, 2025
Led development of marketing web applications using React, TypeScript, and Storybook to enhance user engagement and brand presence. Integrated Contentful as headless CMS, reducing content update time by 40% and improving scalability. Collaborated cross-functionally in Agile 2-week sprints, improving development velocity by 30%. Built reusable React components with Storybook documentation to ensure UI consistency and speed onboarding.
Senior Full-Stack Engineer at Teampay
June 30, 2021 - July 31, 2025
Migrated core frontend from JavaScript to TypeScript, reducing runtime errors and improving maintainability. Developed scalable UI components using React, Redux Thunk, and Material UI. Built GraphQL server with Node.js (Apollo Server), reducing API overfetching by 40%. Implemented Jest and Cypress tests for CI/CD pipelines, achieving over 90% test coverage.
Part-time Consultant at phData
June 30, 2021 - July 31, 2025
Developed internal developer tools using Spring Boot, Antlr, and React for SQL parsing across Snowflake and Hive. Designed Traverse, a graph-based Snowflake security visualization platform using React and Cytoscape.js. Rebuilt AngularJS apps to React + TypeScript, improving performance and maintainability by 60%. Enhanced data ingestion pipelines integrating Spring microservices with S3, Snowflake, and Kafka.
Senior Software Engineer at Asana
June 30, 2019 - July 31, 2025
Migrated core web app to React/Next.js with Spring Boot backend. Built D3.js data visualizations for internal analytics dashboards. Optimized performance with lazy loading and bundle splitting, reducing TTI by 38%. Conducted accessibility audits and implemented WCAG 2.1 compliance.
Senior Software Engineer at Airbnb
June 30, 2016 - July 31, 2025
Delivered React-based front-end features and admin tooling. Developed Java-based backend services for claims and financial workflows. Mentored junior engineers and supported full-stack deliverables.
Engineering Intern at Facebook
June 30, 2013 - July 31, 2025
Assisted frontend engineering team in building FB app features. Gained experience in large-scale React architecture and best practices.

Education

Bachelor’s Degree at National Taiwan University
September 1, 2008 - March 31, 2012

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Media & Entertainment, Professional Services