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David Brown

@davidbrown10

Full Stack & AI Engineer at Freelance, integrating LLMs into web applications and building conversational and content-generation workflows.

United States

Message

At Freelance, I develop custom web applications with React, Next.js, TypeScript, Python, and Node.js. I integrate LLM APIs into conversational experiences, AI-generated content, and task automation workflows.

At Petco México, I architected headless e-commerce platforms supporting 500K+ monthly active users. I reduced page load times by 30%, contributing to a 12% increase in conversion rates and $2M+ in additional revenue.

Experience

Work history, roles, and key accomplishments

Current

Software Developer

Current

Freelance

Dec 2025 - Present (10 months)

Owned end-to-end development of custom web applications, building responsive React and Next.js interfaces with TypeScript and backend services in Python and Node.js. Integrated LLM APIs into application workflows to support conversational experiences and task automation.

React Next.js TypeScript Python NodeJS LLM Integrations REST APIs Git AI assisted Development

Full Stack Engineer

Self

Apr 2025 - Aug 2026 (1 year 4 months)

Designed and built full-stack web applications with React, Next.js, TypeScript, Python, and Node.js, taking features from initial architecture through working implementation. Implemented RESTful services, authentication flows, and database-backed application logic.

React Next.js TypeScript Python NodeJS REST APIs Authentication Databases AI assisted Development

Full Stack Engineer

Petco México

Aug 2024 - Feb 2025 (6 months)

Architected headless e-commerce platforms using Next.js, React, TypeScript, Shopify Storefront API, and Contentful CMS, supporting 500K+ monthly active users. Reduced page load times by 30% through image optimization, lazy loading, and edge caching, contributing to a 12% increase in conversion rates and $2M+ in additional revenue.

Next.js React TypeScript Shopify Storefront API Contentful CMS NodeJS ExpressJS REST APIs Jest Cypress A B Testing

Software Developer

Software Enterprise Services (SES)

Oct 2023 - Jul 2024 (9 months)

Developed enterprise applications for financial reporting, payroll processing, and administrative workflows using Angular, ASP.NET, C#, and SQL. Designed and implemented RESTful APIs and backend business logic using .NET Web API, integrating frontend applications with enterprise systems.

Angular ASP.NET C#SQL .NET Web API REST APIs GitLab CI CD Testing Automation

Full-Stack Engineer

Turing

Oct 2021 - Sep 2023 (1 year 11 months)

Developed and maintained enterprise full-stack applications using Java, Spring Boot, React, JavaScript, TypeScript, Node.js, and Express.js, supporting supply-chain management, warehouse operations, and business workflows. Designed and implemented RESTful APIs, SQL-backed backend services, and secure integrations using OAuth 2.0 authentication.