Carlos Queiroz, Full Stack Developer

About

Accomplished Full-Stack Engineer with 7+ years of experience driving the development of robust web and mobile applications. Expertise in JavaScript, TypeScript, React, React Native, Node.js, and AWS. Proven track record of delivering high-impact solutions for global clients including Burger King, AB InBev, Nestlé, and Domino's. A strategic problem-solver with a startup mindset, dedicated to user-centric design and fostering collaborative, high-performing teams. AWS Certified Solutions Architect - Associate.

Experience

CI&T

Feb 2020 – Present

Belo Horizonte, MG - Brazil

Software Engineer

- Led the development of a cross-platform (iOS, Android, Web) Expo application for a leading international client, leveraging XState v5 and WatermelonDB to deliver a seamless offline-first user experience. - Boosted B2B e-commerce project test coverage from 30% to 90% by implementing comprehensive integrated component tests with Jest and React Testing Library, significantly enhancing deployment stability. - Architected and implemented Optimistic UI by customizing Apollo GraphQL cache, slashing ~60-second loading times, and providing immediate user feedback. - Engineered complex Google Maps polygon logic to resolve delivery area conflicts for client establishments, optimizing operational efficiency. - Developed and enhanced B2C e-commerce platforms using Next.js, React, Styled-Components, and Apollo GraphQL. - Led training sessions and created extensive documentation on front-end testing best practices for both internal teams and clients, establishing a culture of quality. - Contributed to backend development using Node.js (NestJS) and various AWS services, including Lambda functions.

Queima Diaria

Sep 2019 – Feb 2020

Belo Horizonte, MG - Brazil

Frontend Enginner

- Developed and optimized a mobile-first web application (ReactJS) and contributed to Smart TV application layouts, enhancing user engagement across multiple platforms. - Successfully implemented a live video streaming feature using Vimeo API, from proof-of-concept to production, validating user engagement and business value. - Collaborated closely with UX/UI designers to ensure optimal Smart TV app usability across diverse screen sizes.

Tracksale

May 2019 – Sep 2019

Belo Horizonte, MG - Brazil

Frontend Enginner

- Drove a significant increase in B2B application test coverage from 10% to 80% using Jest and React Testing Library. - Designed and developed reusable UI components with TypeScript, React, and Styled-Components, contributing to the company's Design System. -Mentored and trained interns on software development best practices.

Linx

May 2015 – May 2019

Cascavel, PR - Brazil

Implementation Analyst

- Analyzed client business processes, configured ERP systems, and delivered targeted user training, improving system adoption and operational efficiency for diverse clients. - Managed end-to-end project timelines for system implementations, ensuring on-time delivery.

Education

FGV

Jan 2017 – Dec 2018

MBA, Business Administration

Universidade FUMEC

Jan 2010 – Jul 2013

AAS, Information Technology Management

Carlos Queiroz

Full Stack Developer

Skills

Languages