I’m Sebastien Barrau, a product builder in Miami.

I work across software, AI tools, blockchain infrastructure, developer platforms, and the occasional hardware experiment, spending most of my time turning ideas into working products.

My path into technology started early. As a kid, I found an ad for free web hosting in a computer magazine, signed up, and started building. That curiosity eventually became Sakgenla, a web forum for the Haitian community. It was my first real online project, and it taught me what still drives me today: the internet is most interesting when you use it to create something useful for real people.

I originally studied graphic design because I wanted a stronger creative foundation for building on the web. That mix of design and engineering has shaped my whole career. I care about how products work, but also how they feel, how people discover them, and whether they actually solve the problem they were built for.

Over the years, I’ve worked across design, web development, product ownership, customer discovery, engineering leadership, and startup operations. At Octopi, I started by visiting port terminals, interviewing operators, observing how they worked, and bringing those insights back to help shape the product. I later moved into product ownership and developer leadership, writing code, reviewing PRs, leading a team of developers, and helping build the product through its acquisition by Navis.

Today, I work at QuickNode as a Senior Product Manager leading blockchain infrastructure products. Before that, I joined QuickNode as a Technical Partner Manager, where I helped triage, test, onboard, and manage marketplace partners. The work brings together product strategy, developer empathy, technical judgment, and a deep interest in infrastructure that helps other builders move faster.

Outside of QuickNode, I’m a founder and product builder. Through Bluejay Labs, I’ve built and operated SaaS products like BusinessCards.io, QRdex, ReviewCards, htmlsig.com, and other tools for small businesses and teams. I also build AI-native products through 3Sparks, including native apps and tools that explore local LLMs, OpenAI-compatible APIs, user-owned model connections, and new ways people can work with AI.

I’m also a lifelong tinkerer. One of my favorite projects was an office foosball scoreboard built with Arduinos, lasers, light sensors, and a Raspberry Pi. It was never polished, but it worked well enough to use during games, and it captured the part of building I still love most: starting with a weird idea, learning whatever is needed, and turning it into something real.

That same curiosity shows up in most of what I do — whether I’m designing a SaaS onboarding flow, building an AI client, experimenting with microcontrollers, improving a developer platform, or hacking on a film scanner in my home office.

I like products that are practical, thoughtful, and a little bit inventive. The kind that start with a real problem, get shaped by real users, and improve through constant iteration.