Through TechReach, a new student club, Caltech undergrads aim to use tech skills to address social problems. Among people who are homeless, lack of connection to family and friends poses an often-overlooked obstacle to stability and well-being. Nivetha Karthikeyan, Myra Cheng, and Andrew Hess address the problem by developing new technological tools for Miracle Messages, a nonprofit that helps reunite homeless people with friends and relatives. Miracle Messages helps homeless individuals record video or audio messages to loved ones they have lost all contact with, and then volunteers scour social media and other digital platforms to find those loved ones and deliver the message. They hope to expand TechReach to five or six new projects involving larger numbers of computer science volunteers and a broader range of issues.