Lucas
Fontinele
Senior Fullstack Software Engineer
8+ years crafting production-grade web and mobile applications. Specialised in React, Node.js and .NET — from architecture to pixel-perfect delivery.
Building things that matter
I'm a Senior Fullstack Software Engineer with over 8 years of experience building production-grade web and mobile applications across fintech, retail, and agribusiness sectors.
Throughout my career I've evolved from a front-end specialist to end-to-end system ownership — architecting and shipping platforms that serve thousands of simultaneous users and deliver real business impact.
I care deeply about code quality, developer experience, and the craft of building performant, scalable software.
Companies I've worked with
A track record spanning real estate, digital education, agribusiness, fashion retail, sports media and a Y Combinator-backed startup.
Career timeline
The highlights from over 8 years building software products.
- Created and maintained the company's Design System, with 22+ components that standardized the visual identity across all Trinus products.
- Helped build a shared file upload solution, adopted by 8 of the company's applications.
- Built features end to end, from modeling business rules to delivering them in the company's products.
- Reworked the event details page and the ticket selection flow, increasing pre-checkout conversion by ~30%.
- Developed new features across different areas of the platform.
- Responsible for the reliability of the most critical journeys: account creation, cart and payment checkout.
- Built features in Cropwise Analytics to visualize farms and multiple plots on interactive maps.
- Kept the experience fast and smooth even when handling large volumes of field data.
- Led the team building internal applications that support C&A's business operations.
- Followed the team's growth and supported developers, keeping deliveries aligned with product needs.
- Built the back-office panel, focusing on a consistent experience for internal users.
- Responsible for building Estádio TNT Sports, a streaming platform used during high-audience sports broadcasts, with events exceeding 100k concurrent users.
- Organized the platform into independent areas (account, sign-in and main experience), making it easier to evolve.
- Built 6+ sports hotsites and landing pages, taking part in defining the audience metrics tracked on each one.
- Built key search and filtering features, making results faster and the experience smoother for users.
- Helped organize the platform into independent applications with shared sign-in and access control.
- Built and maintained the customer acquisition landing page, optimized for search engines and fast loading.
Technologies & tools
The main technologies I work with daily and the broader stack I've built expertise in.
Thoughts on software engineering
Articles on architecture, front-end craft, career growth, and the engineering lessons I've learned the hard way.
Let's work together
Have a project in mind or just want to chat? Drop me a message and I'll get back to you as soon as possible.
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