FelipeMarcelino
Full Stack Developer & SaaS Founder
I'm a full-stack software engineer with a degree in information systems and over 4 years of experience, currently working at Avanti. I operate in the ecosystem of large-scale e-commerces — building digital solutions that impact the shopping experience of thousands of monthly users. Leading technical fronts in the implementation of innovative projects with VTEX FastStore, focused on modern architecture and performance.
I work across every stage of the development cycle — from architecture planning to production delivery. On the frontend, I master React, TypeScript, performance optimization (Core Web Vitals, LCP, CLS), accessibility, and design systems. On the backend, I build globally available, scalable APIs with no bottlenecks, using Node.js, PostgreSQL, Redis, and Docker. On the deployment side, I own the full pipeline: CI/CD with GitHub Actions, VPS infrastructure, and zero-downtime releases.
Api Friend · 2026Api Friend · 2026
API Health Checker
- 24/7 monitoring of your services at configurable intervals.
- Anomaly detection: status goes offline at the first sign of error or instability.
- Auto-Healing: direct webhook to Coolify triggers an immediate redeploy of the affected app.
- Discord notification with a detailed error card and recovery confirmation.
FasterChat · 2026FasterChat · 2026
AI Chatbot + CRM
The complete solution to turn WhatsApp into a sales and customer service machine. Robust CRM, visual flow builder, cutting-edge AI agents, and mass messaging.
- Multiple WhatsApp accounts in a single centralized chat.
- Mass messaging to segmented contact lists.
- Sales funnel with advanced conversion metrics.
SnappCheckout · 2025SnappCheckout · 2025
White Label Checkout
Robust checkout built for sales performance. Already generated over R$50k in revenue with more than 10,000 sessions.
- Integration with credit card, PayPal, and PIX.
- 100% customizable offer page builder.
- A/B offer testing to maximize conversion rates.
Avanti · January 2025 — PresentAvanti · January 2025 — Present
Junior Full-Stack Developer
I worked on the development and deployment of e-commerces, with emphasis on technical leadership in the implementation of multiple projects using the cutting-edge VTEX IO and FastStore architecture. Actively participating in technical and architectural decisions for the implementation of more than 15 e-commerces with mastery.
- Migration and launch of Lindt's e-commerce with 99.9% availability during peak traffic.
- Frontend optimization achieving ~50% improvement in LCP, directly impacting conversion rates.
- Technical reference for the team, mentoring peers on best practices.
BarbeariAgendamento · 2025BarbeariAgendamento · 2025
Financial Management & Scheduling for Barbershops
Platform built to solve a real problem: the chaos of scheduling and financial management in barbershops. Over a year live, the system supports 500+ weekly users and 6 monthly subscriber barbershops. Automated WhatsApp messages, integrated payment checkout, and full financial control — all in one solution.
Avanti · July — December 2024Avanti · July — December 2024
Front-end Developer Intern
Worked on the front line of high-performance e-commerce implementations within the VTEX ecosystem, delivering agile solutions and conversion-optimized interfaces. Built reactive and scalable components with React and TypeScript, focusing on Core Web Vitals to improve SEO ranking and user experience. Implemented GraphQL data-fetching strategies that reduced over-fetching and cut page load times by up to 70%.
Carol Quintana · 2024Carol Quintana · 2024
Landing Page — Carol Quintana
A landing page built to convert. Developed with React, TypeScript, and SASS, every detail was designed to turn visitors into customers: clear visual hierarchy, ultra-fast loading, and green Core Web Vitals across the board. The result is a page that not only looks great but actively works to drive conversions.
Zapfy · 2023Zapfy · 2023
First Website in Production
My first website developed 100% on my own that went into production. I built from scratch the website for a chip sales company, focusing on performance, responsive design, and a clear and straightforward shopping experience.
Compass.uol · June — October 2022Compass.uol · June — October 2022
Front-end Developer Intern
I had the opportunity to learn and develop my skills as a front-end developer. During the internship, I was exposed to various technologies, including HTML, CSS, JavaScript, ReactJS, TypeScript, and Node.js, among others. I also had the chance to work as part of a team, collaborating with other developers and learning from their expertise.