Open to opportunities

Alejandro Sanchez

@alejandrosanchez

Message

I'm Lead Full Stack and AI Developer delivering scalable web and intelligent automation.

United States

Message

What I'm looking for

I'm seeking a senior role building scalable web and AI products on collaborative Agile teams where I can lead engineering, architect systems, drive automation, and deliver measurable business impact using modern JS/Python stacks.

I have over 10 years of experience as a Full Stack and AI developer, building web and AI-driven solutions using JavaScript, TypeScript, Python, React, Node.js, Next.js and modern databases. I focus on creating performant, maintainable systems that solve real business problems.

I have architected 20+ full-stack and AI solutions across fintech, healthcare and logistics, including a Next.js e-commerce platform that improved load times by 50% and conversions by 30%, a LangChain/RAG AI chatbot that cut support response times by 70%, and microservices on AWS handling 1M+ daily transactions with 99.9% uptime.

I prioritize clean code, TDD, and Agile collaboration, mentoring engineers and driving measurable outcomes. I enjoy designing automation workflows, scalable architectures, and AI agents that deliver clear client value and 100% client satisfaction.

Experience

Work history, roles, and key accomplishments

Senior Full Stack & AI Engineer

Freelance

Oct 2022 - Apr 2025 (2 years 6 months)

Architected 20+ full-stack and AI-driven solutions for fintech, healthcare, and logistics clients, delivering scalable SaaS platforms and automation workflows. Built a Next.js e-commerce that improved load times by 50% and conversions by 30%, and a LangChain/RAG chatbot that reduced support response times by 70%.

JavaScript TypeScript Python Next.js Lang Chain MongoDB AWS

Lead Full Stack Developer

Moesif

Oct 2021 - Sep 2022 (11 months)

Led a team of six to build a TypeScript/React dashboard with real-time analytics serving 10K+ daily users and D3 visualizations. Optimized Node.js/Express APIs to reduce response times by 40% and migrated to serverless AWS Lambda to cut infrastructure costs by 25%.

TypeScript React D3.Js Node MySQL Redis AWS JWT

Full Stack Developer

Ladder

Jan 2018 - Oct 2021 (3 years 9 months)

Revamped a React-based SaaS platform with Node.js and MongoDB, adding real-time notifications and user roles that increased client retention by 30%. Optimized MongoDB queries and indexing to support 100K+ monthly users and reduced API response times by 45%.

React Node MongoDB Express Stripe Sendgrid OAUTH2 AWS

Junior Web Developer

Rootstack

Mar 2013 - Aug 2017 (4 years 5 months)

Built responsive React frontends and implemented Redux state management for a SaaS project management tool, improving user satisfaction by 20% and reducing re-renders to boost performance by 30%. Adopted TDD practices that cut production bugs by 15%.