08/25/2025 updated

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Senior Full-Stack / LLM Engineer with 10+ years experience in React, Java, and AI technologies

Brooklyn, USA Master's Degree in Computer Science
Brooklyn, USA Master's Degree in Computer Science

Profile attachments

Elijah Nevel.pdf

Java (Programming Language)JavaScript (Programming Language)Artificial IntelligenceAmazon Web ServicesAmazon S3Cloud ComputingDatabasesContinuous IntegrationDevOpsAmazon DynamoDBGithubPostgreSQLMongoDBMySQLNode.JsScrum MethodologyNext.jsTesting StrategiesTypeScriptWeb ApplicationsWorkflowsTestingReactJSLarge Language ModelsSpring-bootTooling Assembly and DismantlingCypress (Programming Language)GitlabGitFull Stack DevelopmentBitbucketGraphqlFront End Software DevelopmentReact ReduxDatabase AdministrationDockerJenkins
Full-Stack Development
Extensive experience with Java, Spring Boot, React, and modern frontend frameworks for building scalable web applications with optimized performance

LLM/AI Engineering
Expertise in implementing LLM-enabled systems using OpenAI, LangChain, and Pinecone for knowledge retrieval and documentation search

Cloud Infrastructure
Proficiency with AWS services including Lambda, Cognito, Amplify, S3, and CDK, along with Docker and Jenkins for deployment and CI/CD

Frontend Technologies
Advanced knowledge of React ecosystem including React Hook Form, Redux, Next.js, TypeScript, and component libraries

Database Management
Experience with various database systems including PostgreSQL, MySQL, MongoDB, and DynamoDB

Testing Frameworks
Implementation of comprehensive testing strategies using Jest, Cypress, and React Testing Library

GraphQL Development
Creation of GraphQL servers using Apollo and Node.js for efficient data querying and reduced overfetching

DevOps & Tooling
Proficiency with Git, GitHub, GitLab, Bitbucket, and Agile/Scrum methodologies for efficient development workflows
 

Languages

EnglishNative speaker

Project history

Senior LLM / Full-Stack Engineer

Samsung Research America
Built analytics dashboard with React, Express, and Highcharts. Developed scalable Java Spring Boot APIs. Designed and deployed LLM-enabled knowledge retrieval system using OpenAI, LangChain, and Pinecone. Integrated React front-end with RAG pipeline for customer support automation.

Senior Full-Stack Engineer

Twitter
Led end-to-end development of Twitter marketing web applications using React, TypeScript, and Storybook. Integrated Contentful as a headless CMS. Collaborated with Twitter Partner Web team in Agile sprints. Developed reusable React components documented via Storybook.

Senior Full-Stack Engineer

Teampay
Migrated frontend codebase from JavaScript to TypeScript. Engineered UI components using React, React Hook Form, Redux Thunk, and Material UI. Developed GraphQL server using Node.js and Apollo Server. Implemented Jest and Cypress tests for CI/CD pipelines.

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