Andrew De Stefan is a senior software engineer with experience developing backend and frontend applications using languages like Python, Ruby, PHP, Java, and Javascript. He has worked at GoFundMe and HostDime, where he managed search infrastructure and algorithms, introduced development environments, and developed tools to help scale traffic and respond to security incidents. His skills include web and fullstack development, test-driven development, system administration, and configuration management using tools like Ansible, Puppet, and New Relic.