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 product studios, tech consultancies, and Y Combinator-backed startups.
Career timeline
The highlights from over 8 years building software products.
- Architect and deliver fullstack applications across 5+ industry verticals using .NET, Node.js and React.js.
- Built real-time dashboards and high-demand e-commerce platforms focused on performance and user experience.
- Implemented complex state management with Redux and Redux Saga across multiple client projects.
- Drove code-review culture and defined technical best practices across project teams.
- Led architectural decisions for high-traffic platforms supporting 200k+ concurrent users.
- Engineered React Native solutions for fintech clients, bridging native Android/iOS SDKs for payment processing.
- Delivered 15+ complex applications end-to-end across diverse industry verticals.
- Implemented automated testing and raised code quality standards across projects.
- Co-built the TNT Sports Stadium platform, supporting 200,000+ simultaneous users with high availability.
- Led the front-end team in defining architecture and technical direction.
- Built performant landing pages and responsive applications with React.js and Gatsby.js.
- Contributed to mobile development with React Native for sports content distribution.
- Migrated a legacy React Class Components application to React.js with TypeScript.
- Developed conversion-focused landing pages with Gatsby, contributing to SEO improvements.
- Delivered across 3 concurrent projects using React.js, Gatsby, Material UI and Styled Components.
- Collaborated on marketplace platform evolution in a YC-accelerated environment.
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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