Upside is revolutionizing brick-and-mortar commerce by applying sophisticated online retail techniques to provide enhanced cashback for consumers and profitable customer acquisition for businesses. As a Senior Application Security Engineer II, you'll play a crucial role in securing their platform that processes billions in commerce annually. Reporting to the Director of Information Security, you'll be responsible for implementing secure coding practices, managing application vulnerabilities, and strengthening the overall security posture. The role combines technical expertise in security engineering with leadership responsibilities, requiring both hands-on coding skills and the ability to guide teams in security best practices. The position offers a competitive salary range of $200,000-$221,000, along with comprehensive benefits including equity, healthcare, and professional development opportunities. The hybrid work environment, based in major tech hubs (Austin, Chicago, DC, or NYC), provides flexibility while maintaining collaborative in-person interactions three days a week. This role is perfect for security professionals who want to make a significant impact on a platform that directly benefits both consumers and businesses while working with modern technologies like AWS, Python, and various security tools.