# Felipe Marcelino — full profile

> Full-stack Software Engineer with 4+ years of experience, focused on product, customers and results. I build web applications, e-commerce and internal systems with React, Next.js, TypeScript, Node.js, NestJS, Fastify and relational databases, from the interface to architecture, integrations, performance, automation and security. I use AI agents in the engineering workflow, with rules, review and tests.

## Impact
- 11s → <1s: critical e-commerce query optimized (90%+ faster)
- ~5 months: from prototype to production of a billing portal
- 130+: ADRs and business rules documented
- ~70: accessible components in a design system with light and dark themes
- 1,500+: employees supported in HR, before tech

## Experience

### Software Engineer (full-stack) — Better EdTech
Apr 2026 – present

Billing, financial reconciliation and critical integrations, focused on automation, traceability, governance and reliability.

- Billing portal from prototype to production in about 5 months: orders, charges, NF-e/NFS-e invoice issuing and access release.
- Automated reconciliation of installments and amounts released by card acquirers, with preview, divergence queue, audit trail and orphan-invoice linking.
- Integrations with Vindi, Omie, Pagar.me, Yapay and Cielo, with webhook logs, Outbox and idempotency.
- Governance: 130+ ADRs and business rules; quality gates on commits and CI, mutation testing, E2E and weekly dependency audits.
- AI agents in the development workflow, with plans, adversarial review and execution evidence.
- Shared design system with tokens and about 70 accessible components, with light and dark themes.

Stack: React, Next.js, Fastify, PostgreSQL, TypeScript

### Full-stack Developer — Rozac
Jun 2025 – Apr 2026

Main platform: new features, architecture evolution, integrations and developer experience.

- Conceived and built Rozac Studio: AI image generation for fabric mockups applied to products and per-seller promotional banners.
- Introduced Skills and MCPs on the front-end for AI-assisted programming, productivity and E2E tests.
- SQL query management UI with React Query and AG Grid, with safe execution and editing.
- Python tool integrated with NestJS over SSE to schedule maintenance mode without developers or a new build.
- Led commit standardization and introduced E2E tests with Cypress.

Stack: React, Next.js, TypeScript, Tailwind CSS, NestJS, Prisma, Redis, Nginx, Python, Cypress

### Full-stack Developer — Inversa Desenvolvimento Digital
Sep 2022 – Apr 2025

E-commerce, landing pages, institutional websites and mobile apps, front-end and back-end, focused on UX, performance and stability.

- Cut a critical e-commerce query from 11 seconds to under 1 second (90%+ reduction).
- Fixed a fraud vulnerability in multi-currency operations caused by cookie manipulation.
- Recurring purchases system, with database modeling, cron jobs and business rules.
- Maintained legacy systems and fixed high-impact production issues.
- Mentored an intern (onboarding and code reviews) until they were hired.

Stack: PHP, MySQL, JavaScript, TypeScript, React, Next.js, React Native

### Front-end Development Intern — Inversa Desenvolvimento Digital
Mar 2022 – Sep 2022

Responsive interfaces from Adobe XD and Figma prototypes.

- Landing pages, institutional websites and email marketing campaigns.
- SEO, accessibility and performance improvements.

Stack: HTML, CSS, JavaScript, jQuery, PHP, MySQL

### HR Apprentice and Assistant — DIA Brasil
Jul 2018 – Sep 2020

Before tech: personnel administration and nationwide employee support.

- Supported 1,500+ employees and benefits delivery.
- Employee documentation, social security leave processes and biometric registration.

## Projects

### Montali Hub
SaaS · own product · live

SaaS for party rental businesses: store website, calendar, contracts and customers in one place, with an AI assistant.

- Calendar that blocks double bookings
- Contracts signed online, with the PDF stored
- CRM with every party's history
- AI assistant in the dashboard and a Claude connector (MCP + OAuth)

Stack: Next.js, React, TypeScript, Supabase, PostgreSQL, MCP

### aidd-framework
open source framework · CLI · published on npm

Framework for building with AI agents without losing quality: rules, skills and automatic git guardrails, installed with one command.

- Per-project rules and skills (aidd init)
- Lint on commit; affected tests and minimum coverage on push
- Living docs in an Obsidian vault
- Incremental updates (aidd update)

Stack: Node.js, JavaScript, Git hooks, Claude Code, npm

### SR Energy
web system for a client · live

Management system for a technical energy services company: commercial proposal, work order, technician schedule and PDF report, in one flow.

- Commercial proposal that becomes a work order on acceptance
- Technician schedule and technical PDF report with evidence
- Role-based access, audit trail and privacy (LGPD)
- In production on its own VPS, used by the team

Stack: React, TypeScript, Fastify, PostgreSQL, Redis, Docker

### GAN
courses & stores platform · live

Platform with an online course and subscription stores: student area, integrated payments, admin dashboard and consent-based analytics.

- Student area
- Per-store subscriptions with Pix payments
- Admin dashboard with contacts
- Analytics only after consent (LGPD) and anti-bot on forms

Stack: Next.js, TypeScript, PostgreSQL, Cloudflare, VPS

### Viviane Marcê
website for a client · live

Website for a wedding decorator in the Campinas region: a scroll-driven animated opening, a portfolio of ceremonies and SEO to be found on Google and by AI assistants.

- 183-frame animated opening, rebuilt with AI upscaling
- Local SEO, structured data and a version for AI agents
- Level 3 in the agent-readiness test
- Own server behind Cloudflare

Stack: Next.js, TypeScript, Tailwind, Cloudflare

## Skills
- Front-end: React, Next.js, React Native, TypeScript, Tailwind CSS, Zod
- Client state & data: React Query, Context API, Zustand
- Back-end: Node.js, NestJS, Fastify, Prisma, Nginx, Redis
- Databases: PostgreSQL, MySQL
- Quality: Cypress, E2E, mutation testing, quality gates
- AI: Claude, Codex, MCP, Skills, Spec-Driven Development, agentes de IA / AI agents
- Tools: Git, GitHub, Bitbucket

## Education
- Postgraduate in AI Process Automation Engineering — Data Science Academy (DSA) (2026–2027, in progress)
- Bachelor's in Information Technology — UNIVESP — Universidade Virtual do Estado de São Paulo (2022–2025)
- Business Administration technician — ETEC Polivalente de Americana (2017–2018)
- IT technician — ETEC Polivalente de Americana (2015–2016)

## Languages
- Portuguese: native
- English: intermediate

## Contact
- Email: felipe99marcelino@hotmail.com
- LinkedIn: https://www.linkedin.com/in/felipe-marcelino
- GitHub: https://github.com/felipemarcelino99
- CV (PDF): https://felipemarcelino.dev/assets/cv-felipe-marcelino-en.pdf

Updated: 2026-10-31