Hi, my name is

Lucas Santos,

Welcome to my portfolio!

Software Engineer with over 5 years in backend and frontend development, specialized in TypeScript, Python, Node.js, React, and Flutter. I have worked across healthcare, finance, retail, automotive, and AI projects, always in remote and multicultural environments.

I bring autonomy, strong communication skills, and a results-driven mindset, with a focus on effective collaboration and delivering value in high-impact projects.

About me

Hello! My name is Lucas. Nice to meet you!

I’ve been working as a developer for over 5 years and I’m always looking to improve and grow as an engineer. I’m passionate about learning new things, which has led me to explore several areas:

  • Backend
  • Web and Mobile Frontend
  • AI
  • Augmented Reality
  • Embedded Systems
  • And more...

I have solid experience working with Git and code review processes, ensuring effective collaboration in remote teams and maintaining high-quality version control across projects. In recent years, I’ve specialized in TypeScript, Python, Node.js, React, and Flutter, contributing to large-scale systems in healthcare, finance, retail, and automotive.

Below I’ll also list some of the software-related books I’m currently reading or have already finished and really enjoyed.:

Headshot

Where I've Worked

Software Engineer @ Profusion Mobi

October 2021 - Present

  • Led onboarding and mentorship for new developers, ensuring knowledge transfer and growth.
  • Developed a backend server for investment products (Fixed Income, Funds) using Node.js, TypeScript, and GraphQL, contributing to a $200M acquisition.
  • Created Augmented Reality mobile experiences using Flutter, Provider, and Unity, reaching over 200k downloads.
  • Built automotive infotainment apps with TypeScript and Node.js, migrating legacy JavaScript codebases for better scalability and maintainability.
  • Designed a scalable backend and data lake using AWS (S3, Glue, Lambda, DynamoDB, SQS) for a healthcare chatbot; deployed ML models with SageMaker, integrated LLMs, knowledge graphs, BKTree, and prompt engineering.
  • Used Golang for REST APIs (OpenAPI), RabbitMQ messaging, PostgreSQL, and Docker to build a backend for a financial system for Brazil’s largest retailer.
  • Architected and implemented AI assistants powered by OpenAI Agents, using React (Vite) and Tailwind CSS for the frontend, FastAPI for backend communication, and Supabase for real-time data and authentication.

Some Things I've Built

  • Featured Project

    Never Have I Ever

    Developed a social game app with Flutter and Bloc, boasting over 50k downloads, offering over 400 engaging questions for fun with friends.

    • Flutter
    • Dart
    • Bloc
    External Link

  • Featured Project

    Devfolio

    Devfolio is a portfolio designed to showcase professional information such as the companies I've worked for and the projects I've participated in, primarily for people in technology-related fields.

    • React
    • Gatsby
    • Javascript
    External LinkGitHub

What's Next?

Get In Touch

You can contact me with any questions, suggestions, or just to say hi. I am always open to new ideas and collaborations. Whether it's about collaborating on exciting projects, startups, open-source, or anything else, feel free to reach out.