Izac Cavalheiro 23+ years software development

Senior Full-Stack Engineer & Tech Lead

Started coding out of curiosity — 23 years later I still approach every system the same way. I build payment infrastructure, investment platforms, and hospitality SaaS that real companies across the USA and Europe depend on, using TypeScript, React, and Node.js as the foundation.

TypeScript
JavaScript
Java
Python
Node.js
NestJS
Express
GraphQL
React
React Native
Next.js
Remix
CSS/SASS
PostgreSQL
DynamoDB
MongoDB
AWS
Azure
GCP
Cloudflare
Nx
Vite
Vitest

Current Focus

Full-Stack React & Delivery Engineering

Over 23 years, that has meant payment SDKs, investment platforms, hospitality SaaS, and food delivery apps, each with different constraints.

Cross-platform SDK performance across Android, iOS, and Web — inconsistencies solved through Kotlin, Java, and browser environments.
React 17→18 migration on a SaaS platform: Class Components to Functional, concurrent rendering with useTransition and useDeferredValue.
White-label micro-frontend food delivery app on Azure — one codebase across multiple brand implementations without forking.
End-to-end delivery on AWS: NestJS, Apollo GraphQL, PostgreSQL, Kafka across multiple squads.
Cross-platform mobile with React Native alongside server-rendered web delivery via Next.js and Remix.

TypeScript
React
React Native
Next.js
Node.js
NestJS
Apollo GraphQL
Kafka
PostgreSQL
AWS
Cloudflare
Java

Developer experience is the invisible multiplier of any engineering team.

GitHub Copilot workflows and Claude Code agents with custom slash commands — repetitive integration tasks reduced to single commands.
Analysis and optimization of payment SDK architecture across Android, iOS, and Web for a fintech serving major companies and banks across the USA and Europe.
Technical documentation focused on reducing integration escalations for internal engineers and external partners.

GitHub Copilot
Claude Code
TypeScript
React
Node.js
Java
AWS
Cloudflare

You cannot improve what you do not measure — and you cannot measure what your team does not trust you to measure fairly.

DORA metrics as a continuous improvement baseline: deployment frequency doubled, lead time for changes halved.
Test coverage from near-zero to a sustained baseline across multiple product squads. Code quality standards adopted team-wide.
Multidisciplinary team management through full software development lifecycles — OKR definition and tracking, career development planning, business process optimization, and cross-functional stakeholder alignment.
Technical decisions aligned with business OKRs through integration of product and stakeholder context into the planning process.

DORA Metrics
TypeScript
Next.js
NestJS
Apollo GraphQL
Kafka
PostgreSQL
AWS

Senior Full-Stack Engineer & Tech Lead

Full-Stack React & Delivery Engineering

Full-Stack & Mobile Engineering

AI & Developer Experience

Engineering Leadership