You can volunteer your skills to work with nonprofits that use technology to accelerate their impact. The most well-known of these tech nonprofits are Mozilla,

You can volunteer your skills to work with nonprofits that use technology to accelerate their impact. The most well-known of these tech nonprofits are Mozilla, Khan Academy, Wikipedia. Some have come through YC, like Watsi and SIRUM. At Fast Forward (org that I started, like a YC for nonprofits), we have a listing of some available tech-based volunteer opportunities on our website (https://www.ffwd.org/tech-nonprofit-jobs/opportunities/?_sft_position_type=volunteer&_sft_position_category=technical https://www.ffwd.org/tech-nonprofit-jobs/opportunities/?_sft...). For example, TalkingPoints (tool for teachers to text parents) is looking for a machine learning advisor. MindRight (text message counseling for kids who have suffered trauma) is looking for a code reviewer. Your software engineering skills are incredibly valuable, and it's hard for nonprofits to find and afford quality developers. Providing those skills can greatly help others.