Explore the challenges of writing secure software and learn effective strategies to overcome them in this 47-minute conference talk from Devoxx. Discover how to combine principles from Domain Driven Design with security awareness to create secure code while maintaining focus on business features. Learn about Secure by Design principles, including Domain Primitives and Entity Snapshots, to strengthen your codebase. Understand the concept of Domain DoS attacks and how to integrate security testing into your delivery pipeline. Gain practical, applicable tools and ideas for immediate implementation in your daily work. Presented by Daniel Sawano, a seasoned developer and architect with expertise in high-performance systems, and Daniel Deogun, a Coder and Quality Defender specializing in secure software design, this talk offers valuable insights for developers seeking to enhance their security practices while meeting project deadlines.