Izac Cavalheiro

Work History

23+ years of software engineering across fintech, hospitality, investment platforms, and entertainment — from freelance developer to senior engineer and engineering lead.

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  1. Senior Software Engineer

    Trustly

    Aug 2024 — Present Now

    in progress…

    • in progress…
    • TypeScript
    • Node.js
    • NestJS
    • React
    • React Native
    • Remix
    • Nx
    • Java
    • AWS
    • Cloudflare
    • PostgreSQL
  2. Senior Software Engineer

    Optii Solutions Contractor via Luby

    Aug 2023 — Aug 2024

    Developed an operations management SaaS platform for the hospitality industry — hotel room assignments, staff scheduling, and maintenance workflows.

    • Led critical upgrade from React 17 to React 18, migrating all Class Components to Functional Components and enabling useTransition and useDeferredValue
    • Applied SOLID principles building production solutions with TypeScript, React, NX, Ant Design, NestJS, and Apollo GraphQL
    • TypeScript
    • React
    • Nx
    • NestJS
    • Apollo GraphQL
    • Ant Design
    • Styled Components
    • Testing Library
  3. Software Engineering Lead

    Creditas

    Nov 2021 — Aug 2023

    Led multidisciplinary engineering teams building a consumer credit platform serving tens of thousands of active customers at one of Brazil's leading fintechs.

    • Implemented DORA metrics framework — doubled Deployment Frequency and halved Lead Time for Changes within 12 months
    • Established code quality, testing, and continuous delivery standards adopted by multiple product squads — raised test coverage from near-zero to a sustained baseline
    • Managed end-to-end development on AWS using Next.js, React, TypeScript, NestJS, Apollo GraphQL, Kafka, and PostgreSQL
    • Next.js
    • React
    • TypeScript
    • NestJS
    • Apollo GraphQL
    • MaterialUI
    • Kafka
    • PostgreSQL
    • AWS
    • Ruby
    • Kotlin
    • Python
  4. Software Engineering Manager

    Pravaler

    Mar 2021 — Nov 2021

    Managed multidisciplinary teams building and maintaining core website and product-oriented solutions for an educational financing platform.

    • Led team through complete software development lifecycle including OKR definition and tracking, business process optimization, and career development planning
    • Built and maintained React + TypeScript frontend with MaterialUI on GCP infrastructure
    • PHP
    • React
    • TypeScript
    • Webpack
    • Jest
    • MaterialUI
    • PostgreSQL
    • GCP
  5. Frontend Engineer Specialist

    Grupo Ultra — KM de Vantagens Consultant via VocêQPad @ KMV

    Jan 2020 — Mar 2021

    Consultant embedded within a major payment and loyalty platform. Architected and built a white-label food delivery application as a micro-frontend solution integrated into the host platform.

    • Designed scalable micro-frontend architecture using TypeScript, React, and Redux, deployed on Azure
    • Delivered reusable components and patterns adopted across multiple brand implementations without forking the codebase
    • TypeScript
    • React
    • Redux
    • Azure
  6. Lead Frontend Software Engineer

    XP Inc

    Jan 2019 — Oct 2019

    Led the migration from a monolithic frontend to domain-specific microservices and micro-frontends at Brazil's largest investment platform.

    • Established micro-frontend patterns and practices adopted company-wide after leading the monolith-to-microservices migration
    • Coordinated with backend teams to design efficient API contracts and integration strategies across microservices
    • JavaScript
    • TypeScript
    • React
    • Redux
    • Node.js
    • Webpack
    • RollUp
    • Styled Components
    • SASS
  7. Senior Frontend Software Engineer

    Easynvest (now NuInvest) Consultant via Iteris

    Sep 2018 — Jan 2019

    Built the core website, landing pages, APIs, and a reusable UI component library for a leading investment platform.

    • Created a reusable component library ensuring visual and behavioral consistency across all digital properties
    • Built landing page APIs and integrated frontend with investment data services on AWS
    • JavaScript
    • TypeScript
    • React
    • Redux
    • Next.js
    • MaterialUI
    • Node.js
    • AWS
  8. Software Engineering Consultant / Tech Lead

    Natura, Ambev & Banco Votorantim via Accenture

    Jun 2017 — Sep 2018

    Tech lead and consultant embedded across three enterprise clients, fostering engineering culture and building scalable solutions for consumer goods, beverages, and financial services.

    • Mentored junior and mid-level developers on modern frontend development practices across client teams
    • Built enterprise solutions using Node, Express, TypeScript, React, Apollo GraphQL, PostgreSQL, MongoDB, and Scylla
    • Node.js
    • Express
    • TypeScript
    • React
    • Redux
    • Apollo GraphQL
    • AngularJS
    • PostgreSQL
    • MongoDB
    • Scylla
  9. Lead Software Engineer

    VirtualNet

    Jan 2015 — Jun 2017

    Led the engineering team building localized and internationalized websites and CMS solutions for Sony Pictures and Walt Disney Latin America (Columbia Pictures and Buena Vista).

    • Led a team delivering entertainment industry solutions supporting multiple languages and regions for major Hollywood studios
    • Managed full-stack development across Python, JavaScript, AngularJS, Laravel, WordPress, and MySQL
    • Python
    • HTML5
    • SASS
    • JavaScript
    • AngularJS
    • Laravel
    • CodeIgniter
    • WordPress
    • MySQL
  10. Founder / Full Stack Developer

    i9Mais

    Jan 2007 — Dec 2014

    Founded a software development consultancy providing custom web applications, e-commerce platforms, and digital solutions for advertising and marketing firms across São Paulo state.

    • Delivered custom web applications and e-commerce platforms for small and medium-sized businesses across São Paulo
    • Python
    • PHP
    • Flash
    • ActionScript
    • WordPress
    • Zend
    • MySQL
  11. Web Developer

    IC Dev Freelancer

    Jun 2002 — Jan 2007

    Started career as a freelance web developer building custom web applications for small and medium businesses across the Campinas region.

    • Built foundation in web development — Flash, ActionScript, JavaScript, PHP, ASP — and client communication skills
    • Flash
    • ActionScript
    • JavaScript
    • PHP
    • ASP
    • HTML