Open to opportunities

Gabriel Barreto de Oliveira

@gabrielbarretodeoliv

Message

I build and scale SaaS marketplaces and CRM platforms with React, Next.js, Node.js, and TypeScript.

Brazil

Message

What I'm looking for

I'm looking to build and scale SaaS or marketplace products where I can own architecture and delivery across frontend, backend, payments, and product-critical business logic.

I'm the sole engineer behind Printheim, taking a live STL marketplace from its first commit to real customer sales. I own the Next.js architecture, Stripe Checkout, ledger-tracked creator payouts, and moderation workflows for bans, reviews, and DMCA takedowns.

At Clientbook, I reduced large-report load times by over 80% and cut frontend build time from 20 minutes to 2 minutes. I also led core CRM modules including Reports, Appointment System, Client Page, and Public Form Page from technical design through delivery.

I've also built product features, APIs, web applications, and mobile experiences at Northflow.io, Jet Brackets, and uPaged. I use AI coding agents daily for implementation and review while retaining ownership of architecture, business rules, pricing, and payout logic.

Experience

Work history, roles, and key accomplishments

Current

Senior Full-Stack Engineer

Current

Printheim

Dec 2025 - Present (8 months)

Built an STL marketplace end to end as a Next.js App Router monolith, owning architecture from data model to checkout flow, and took it from first commit to a live marketplace. Implemented payment and payout pipeline with Stripe Checkout, backed by a ledger tracking creator balances and revenue splits.

Next.js TypeScript Prisma PostgreSQL Stripe Vitest