Welcoming Lucas Vieira, our new Software Engineer

Say hello to our new team member, Lucas Vieira.

He helped build and scale the data infrastructure at Yalo and at Joga, where he designed systems to process data and serve machine learning models to tens of thousands of users.

How did you get into software?

I've been around computers since I was a kid, always curious to mess with settings and break things just to figure out how to fix them. That curiosity led me to learn how to format my own PC and, later, to create a private server for Tibia, where I first got into programming (Lua) and databases (MySQL), editing scripts to add NPCs, spells, and monsters.

So when it came time to choose a profession, I had no doubts — I wanted to be a programmer. Coding has always been what I love to do, and I feel lucky that today my job is also my biggest passion — something that still feels like fun.

Why are you at Resend?

I've been following Zeno for a long time, ever since his open source projects and HTML5 talks. I first discovered Resend when it launched and quickly became a happy customer at my startup — it just works: copy a snippet, paste it, pure code, with very little configuration or boilerplate. That's exactly the kind of developer experience I love.

I get really excited about working on systems that operate at scale and handle high loads, and the chance to help Resend build the most robust email infrastructure on the planet is exactly the kind of challenge I enjoy. On top of that, joining an early-stage startup that's growing this fast is an incredible opportunity, and I'm thrilled to be part of it.

Where do you find #inspiration?

For me, the biggest source of inspiration is being around talented and highly skilled people — it motivates me to push myself and keep improving. Another big source is open source projects, where I can see amazing ideas in action and learn from the work of a global community.

If you weren't programming, what would you be doing?

That's a tough one. Programming feels so natural to me that I think if I worked with something else, I'd still end up using code to make my job easier.

I've always liked math a lot, so maybe I'd go into some kind of engineering, like chemical or civil engineering. Or, taking a completely different path, I also love music and play a few instruments — so maybe I could see myself as a musician too.

What does your desktop/home screen look like?

My desktop is usually cluttered with screenshots that save to Desktop by default, but since this is a new MacBook, it's still clean. I rarely look at the home screen anyway since I practically live in the terminal, so it just displays the default wallpaper of whatever MacOS version I'm running.

Favorite tool?

Vim. I love how powerful and customizable it is. Once you get used to it, it feels like an extension of your hands — everything flows faster, and I don't need to leave the keyboard to get things done. I've tried other tools with Vim mode, but it's never quite the same. Vim isn't just about hjkl; it's such a powerful tool that even after more than a decade, I'm still learning new things with it.

Favorite hotkey?

ctrl-o. In Vim, it's part of the jump list navigation: it lets you go back to where you came from. For example, if I follow a definition or jump to another part of the code, ctrl-o takes me back instantly. Super useful when moving around large codebases.

Favorite place to visit?

Florianópolis. It's my hometown, so it naturally feels like home to me. My closest friends and family live there, and the place holds my best memories. It has beautiful landscapes and a peaceful, quiet atmosphere which I enjoy a lot.

Advice for ambitious software engineers?

Be curious and try to really understand how things work at the most fundamental level. Don't just use tools and libraries as black boxes — explore what's behind them. For example, look into the source code of your dependencies or try implementing your own HTTP client. You'll learn a lot by seeing how things are built, and that deeper understanding will make you a stronger engineer.