/ fintech depth
Financial systems, wired end to end
At Haven, integrated QuickBooks, Gusto, Plaid and Treasury Prime to power accounting & payroll — event-driven, scheduled, and observable in production.
Open to Senior roles — remote
João
Rambo.
Fullstack Software Engineer shipping and scaling products across fintech, Web3 and AI — from architecture to production. 5+ years owning systems end to end, with a 0→1 founder's bias for shipping.
// based inBlumenau, SC · Brazil
5+
years shipping production software
9
teams & startups across 4 countries
2×
co-founder — CPO & shipped to stores
E2E
own it — architecture → prod → on-call
01
What I bring
/ fullstack + infra
Frontend to cloud, no handoffs
TypeScript & Rust across the stack; GCP (Cloud Run, Pub/Sub, Cloud SQL) provisioned as code with Terraform. I own the whole path from UI to infra.
/ 0→1 founder
Builder mindset, product sense
Co-founded AITR (as CPO) and Stocks IR — from concept to production, including an official B3 contract and a Play Store launch.
/ ai-native
Spec-driven, agent-accelerated
Practice spec-driven development with Claude Code and custom Claude Skills to ramp fast across unfamiliar stacks and accelerate delivery.
02
Experience
May 2025 – Apr 2026
Remote · United States
Fullstack Software Engineer
@ HavenFintech team building accounting & payroll automation. Shipped features across backend and frontend and owned cloud infrastructure end to end — plus on-call, hotfixes, and 24/7 production support.
- Rust
- Node.js
- Next.js
- TypeScript
- GCP
- Terraform
- TanStack Query
- Redis
- Datadog
Dec 2024 – May 2025
Remote · Brazil
Software Engineer
@ Stealth StartupOwned frontend architecture, design system, and analytics for a real-time, AI-powered web app — AI chat with audio recording and live transcription, plus a metrics dashboard feeding GA into BigQuery.
- React
- Zustand
- BigQuery
- Cypress
- Sentry
Mar 2024 – Mar 2025
Remote · Brazil
Co-founded AI Tech Report; owned product vision and built it hands-on from concept to production. Selected for the Google Cloud for Startups program (São Paulo cohort).
- Next.js
- TypeScript
- OAuth
- GitHub API
- Vercel
- Product
Mar 2024 – Nov 2024
Remote · Italy
Fullstack Software Engineer
@ QiBitBuilt fullstack features in a microfrontend architecture — React frontends and serverless AWS backends, integrating a shared design system with the design team.
- React
- AWS Lambda
- DynamoDB
- S3
- Cognito
Dec 2022 – Nov 2023
Remote · United States
Senior Frontend Engineer
@ Open Access VenturesOwned frontend architecture across multiple Web3 products — blockchain, 3D web, and cross-platform. Mentored engineers and set frontend standards.
- Next.js
- React Native
- Wagmi
- Three.js
- Framer Motion
- Solidity
2021 – 2022
Brazil · Remote
Frontend & Fullstack Engineer
@ Scalable · Sonica · TroquecommerceEarlier roles across Web3 MVPs and e-commerce — sole or first engineer on several products, building full frontends and blockchain integrations in Next.js and TypeScript. Promoted from intern at Troquecommerce.
- Next.js
- TypeScript
- TailwindCSS
- Web3.js
- Ethers.js
03
Stack
/ languages
- TypeScript
- JavaScript
- Rust
- Golang
/ frontend
- React
- Next.js
- React Native
- TanStack Query
- TailwindCSS
- Expo
/ backend
- Node.js
- Fastify
- NestJS
- Express
- Axum
/ cloud & infra
- Google Cloud
- AWS
- Terraform
- Docker
- GitHub Actions
/ data
- PostgreSQL
- Redis
- Prisma
- Drizzle
- SQLite
/ ai tools
- Claude Code
- Cursor
- GitHub Copilot
- Claude Skills
/ web3
- Ethers.js
- Wagmi
- Web3.js
- Solidity
/ testing & obs
- Jest
- Vitest
- Cypress
- Sentry
- PostHog
/ architecture
- Distributed systems
- Event-driven
- Microfrontends
- DDD
- REST · GraphQL
04 / let's talk
Looking for someone who ships?
Open to Senior roles — Frontend, Fullstack or Backend. Remote-first. Let's talk about what you're building.