Sean Donelan won the challenge with his mobile app, "NetHam."

The CAC is a public initiative to encourage young people to learn how to code in an effort to inspire creativity and encourage interest in STEM — Science, Technology, Engineering and Mathematics — education.

The winner of the challenge was Sean Donelan, who lives in Concord and attends Northgate High School. Donelan designed and created, "NetHam: The Public Service Event Coordinator's Third Hand."

Donelan's winning software application replaces amateur radio operators' large, unwieldy equipment and automates their more basic tasks. The app is meant to allow operators to more easily serve as long-range communicators for public events.

"I congratulate Sean on the design of a creative and useful app that would benefit the amateur radio community and look forward to seeing 'NetHam' represent the many talents of Contra Costa County's students when on display in the United States Capitol," said DeSaulnier, who hosted the competition for the sixth time.

The competition's panel of judges included Queenie Lau, a mobile app developer at UC Berkeley; Ruben Hernandez, director of Projects and Programs for the Office of Richmond Mayor Tom Butt; and James Lyons, district coordinator for the Office of Contra Costa County Supervisor John Gioia.

Established in 2014, the CAC has now reached over 14,000 students across the country, including those in underserved and rural areas.

More Information - https://patch.com/california/concord-ca/concord-student-wins-congressional-app-challenge