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Rafael Thomazzi

@rafaelthomazzi

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I build Node.js and TypeScript backend services for payments, enterprise integrations, and blockchain products.

Brazil

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What I'm looking for

I'm looking to build and support backend services, especially for payments, enterprise integrations, financial applications, or blockchain products, working from initial design through production.

I've built and maintained payment-gateway services at BrainRocket, delivering PSP integrations for deposits, withdrawals, callbacks, and transaction status handling. I also debug production payment flows across gateway and provider APIs in a distributed international team.

Previously, I owned Node.js and TypeScript APIs and microservices for Sky.One Solutions' enterprise integration platform, from design through production support. Across CI&T, Gold Rush, and Eight Assets, I've built blockchain monitoring services, smart-contract integrations, and web and mobile products using AWS, Solidity, React, and React Native.

Experience

Work history, roles, and key accomplishments

Strong Middle Backend Developer

BrainRocket

Feb 2026 - Sep 2026 (7 months)

Built and maintained backend services for a payment gateway, focusing on integrations with payment service providers. Delivered new PSP integrations end to end, including deposits, withdrawals, provider callbacks, and transaction status handling.

TypeScript NestJS PostgreSQL REST APIs Docker

Senior Full Stack Developer

Sky.One Solutions

Nov 2022 - Feb 2026 (3 years 3 months)

Built and maintained the backend of an enterprise integration platform (iPaaS) connecting customer systems to third-party services. Owned REST APIs and microservices in Node.js and TypeScript on MongoDB, from design through release and production support.

Node TypeScript Express MongoDB Docker

Senior Backend Developer

CI&T

May 2022 - Nov 2022 (6 months)

Built backend services for monitoring blockchain transactions, designed to add new networks and contracts without core changes. Wired the monitoring flow on AWS with Lambda, SNS, SES, S3, and DynamoDB, with Jest and Mocha tests around the integrations.

TypeScript Express AWS Web3 Solidity Hardhat Jest

Backend & Blockchain Developer

Gold Rush

Dec 2021 - May 2022 (5 months)

Wrote and deployed Solidity smart contracts for cryptocurrency and NFT products on Ethereum and BNB Chain. Built the backend layer between the product and the contracts with Web3 and Ethers, so application code never called the chain directly.

TypeScript Express MySQL Solidity Web3 Ethers Next.js

Full Stack Developer

Eight Assets

Jun 2020 - May 2022 (1 year 11 months)

Built web and mobile products for clients in several sectors, mostly on the backend and also on the React and React Native frontends. Wrote REST APIs in Node.js and TypeScript over MySQL with Sequelize, moving slow work off the request path with background job queues.

Node TypeScript Express Sequelize MySQL BullMQ Jest React React Native

Junior Developer

Grupo Well

Mar 2019 - Jun 2020 (1 year 3 months)

Maintained, debugged, and extended a school management system used by client schools. Migrated client data from legacy systems into the platform database.