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Hi, I'm

Leonardo Santos

Full Stack Developer · AI & Automation

I solve business problems with software — from landing pages to AI-powered solutions, delivered end to end.

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About Me

Full Stack Developer focused on delivering real value. I combine modern web development with Artificial Intelligence to build solutions that work end to end — from planning to production deployment.

Let's work together

Have a project in mind? Tell me the problem — I'll tell you how I can solve it.

Let's talk

Tell me what you need — I'll reply soon.

  • Reply within 24h on business days
  • Online or in-person meetings
Emailleonardojosantos@gmail.com
LocationBrazil
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© 2026 Leonardo Santos. All rights reserved.

Technologies

Stack I use daily to build complete products.

JavaScriptTypeScriptReactNext.jsTailwind CSSPythonNode.jsFastAPISupabasePostgreSQLGit / GitHubDockerOpenAI APILangChainLangGraphGroqHugging FaceMachine LearningGeminin8nVSCodeClaude CodeAntigravityCursorZed.devOpenRouter

Cases

Anamnese IA
Anamnese IA
In progress

Healthcare management system, currently in production with real users.

TypeScriptTailwind CSSNext.js
View project
Portfólio Pessoal
Portfólio Pessoal
In progress

Bilingual (Portuguese/English) personal portfolio with an administrative panel to manage projects, services, and testimonials. Includes dark mode, responsive design, and performance and SEO optimizations.

Next.jsTypeScriptTailwind CSS
View project

How I work

A clear process, no surprises. You know what to expect at every stage.

  1. 01

    Discovery

    I understand your business, the problem to solve and the expected outcomes. No guesswork — the right solution starts with the right questions.

  2. 02

    Proposal

    Scope, timeline and investment documented and agreed before any line of code. No surprises at the end.

  3. 03

    Development

    Iterative development with frequent updates. You follow the progress and can give feedback at any time.

  4. 04

    Delivery & Deploy

    Production deployment with tests, documentation and complete handoff. You receive everything working and understand how to use it.

  5. 05

    Support

    Post-delivery follow-up to ensure everything works as expected. Adjustments and improvements as needed.

Experience

Internship2026-04 – Present

Intern - Fullstack Developer

Start IA Technology

Development of web and mobile applications using React.js, React Native, Java, and Spring Boot. SQL database modeling, REST API integration, and authentication with JWT. Experience in agribusiness and IoT projects, using Git and Docker in the development cycle.

Desenvolvimento full stackTypeScriptReactjsNextjsGitGithubSQLInteligência Artificial
Volunteer2024-01 – 2025-12

Volunteer Monitor - FullStack Developer

StackX | Tecnologia & Inteligência Artificial

Support for students during the Essential and StackxLab modules in solving tasks and understanding general concepts in programming logic, HTML, CSS, JavaScript, Node.js, Git, and GitHub.

HTMLCSSReactjsGitGithub

Certificates

Continuous education in development, AI and technology.

AcademicDiploma
Análise e Desenvolvimento de Sistemas
by Universidade Estácio de Sá·Oct 2025
AlgoritmosBanco de DadosEngenharia de SoftwarePOORedesWeb
View credential
AI & AutomationNew
Trilha Automação e IA para Negócios: otimizando fluxos de trabalho com n8n
by Alura·Apr 2026
n8nAutomaçãoAPIs RESTRAGMultiagentesIA
View credential
AI & Automation
Carreira Engenharia de Agentes de IA - Nível 3: MLOps e AIOps, operando sistemas de IA em produção
by Alura·May 2026
MLOpsAIOpsObservabilityProduction AI
View credential
AI & Automation
Trilha IA para Devs: Produtividade no Fluxo de Desenvolvimento de Software
by Alura·Apr 2026
ChatGPTClaudeGitHub CopilotIA GenerativaCursorWindsurfGrokGemini
View credential
AI & Automation
Curso Avançado: IA no Frontend
by StackX | Tecnologia & Inteligência Artificial·Jul 2024
IA GenerativaOpenAIReactTypeScript
View credential
AI & Automation
Prototipagem com IA
by StackX | Tecnologia & Inteligência Artificial·Oct 2025
FigmaIA GenerativaPrototipagem
View credential
Back-end
Trilha Praticando Python
by Alura·Nov 2025
PythonRegex
View credential
Back-end
Aprenda a Programar em Python com Orientação a Objetos
by Alura·Oct 2025
POOPython
View credential
Full Stack
Evento Full Stack Week 7
by Full Stack Club·Feb 2025
Next.jsNode.jsReactTypeScript
View credential
Full Stack
Hackathon
by StackX | Tecnologia & Inteligência Artificial·Jul 2024
JavaScriptNode.jsReact
View credential

Showing 1–9 of 42

What I deliver

Complete solutions for every stage of your digital product.

Web Development

Modern, responsive and performant websites and web apps with React and Next.js — from design to deployment.

For whomCompanies and startups that need a solid digital presence
From layout to deployment, full delivery
Request a Quote
Landing Pages

Conversion-focused pages built to capture leads and drive sales, optimized for performance and SEO.

For whomBusinesses that need to convert visitors into customers
Focused on conversion and load speed
Request a Quote
APIs & Integrations

RESTful APIs and integrations with external services — payments, CRM, ERP, WhatsApp and more.

For whomSystems that need to communicate with other platforms
Robust, documented and tested integrations
Request a Quote
Artificial Intelligence

ML and NLP models applied to your business: classification, recommendation, data analysis and intelligent automation.

For whomThose who want data-driven decisions and automated processes
AI applied to real problems, not experiments
Request a Quote
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