Open to opportunities

Charles Reis Ribeiro

@charlesreisribeiro

Message

I modernize enterprise Angular systems and deliver mission-critical frontend applications at scale.

United States

Message

What I'm looking for

I'm looking to continue building and modernizing scalable, mission-critical frontend systems, collaborating across product and engineering teams, mentoring others, and applying AI-assisted development while maintaining rigorous quality standards.

I'm helping United Airlines modernize its Pilot Bidding System, delivering a mission-critical mobile Angular application used by approximately 17,000 pilots. I’ve contributed to upgrades from Angular 10 through Angular 20, architectural refactoring, Nx monorepo adoption, and reactive RxJS workflows.

Previously at TownSq, I built and evolved Angular applications supporting community management and ERP platforms used by more than 6 million users across North America. I improved maintainability and developer productivity with NgRx, Nx, Jest, Tailwind CSS, code reviews, mentoring, and technical guidance.

My earlier work at Ubivis and Gridtech included Industrial IoT, data visualization, Smart Grid, Android, AngularJS, and .NET-integrated web applications. I also use AI-assisted development workflows, including Claude Code, to support debugging, refactoring, analysis, and quality-focused delivery.

Experience

Work history, roles, and key accomplishments

Current

Senior Frontend Web Developer

Current

United Airlines

Oct 2023 - Present (2 years 10 months)

Delivered PBS 2.0, the first major modernization of United Airlines' Pilot Bidding System in over 20 years, serving approximately 17,000 pilots. Played a key role in modernizing a large-scale enterprise Angular application, leading framework upgrades from Angular 10 through Angular 20, dependency modernization, architectural refactoring, and Nx monorepo adoption.

Angular TypeScript RxJS State Management Pair Programming Unit Testing Agile Claude Code AI assisted Development

Frontend Web Developer

TownSq

Dec 2020 - Sep 2023 (2 years 9 months)

Developed and evolved enterprise frontend applications supporting community management and ERP platforms used by more than 6 million users across North America. Improved scalability, maintainability, and developer productivity across a large Angular codebase through NgRx, Nx monorepos, Jest, Tailwind CSS, and modern frontend engineering practices.

Angular NgRX Jest Tailwind Agile

Junior - Mid-level Frontend Developer

Ubivis

Jun 2018 - Dec 2020 (2 years 6 months)

Led the Frontend Chapter, driving engineering initiatives and promoting best practices. Built responsive Angular applications using Angular Material and Bootstrap to visualize complex industrial and operational data through intuitive user interfaces.

Big Data AI Angular Angular Material Bootstrap Industrial IoT Data Visualization Agile

Intern

Gridtech Sistemas e Soluções Ltda

Jan 2017 - Jun 2018 (1 year 5 months)

Developed Android and web applications for the Smart Grid industry, supporting electric, gas, and water utilities through modern software solutions. Built dynamic AngularJS-based web applications using HTML, JavaScript, and modern frontend practices for data-intensive enterprise workflows.