Lily Mara is a Staff Engineer at Discord on the Notifications Platform team. She builds distributed systems to deliver tens of billions of notifications every day to Discord's users.

Previously she was an Engineering Manager and Software Engineer at OneSignal in San Mateo, CA. She led the efforts to create OneSignal's integration with Mixpanel, develop the outcomes system, and improving performance and code simplicity through refactoring efforts. 

Lily is the author of Refactoring to Rust, a book about improving the performance of existing software systems through the gradual addition of Rust code.