Speaker

Joe Leo

Joe Leo

CEO, Def Method and Co-author, The Well-Grounded Rubyist

New York City, New York, United States

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Joe Leo is the founder and owner of Def Method, a New York City-based software consultancy dedicated to building high-quality, thoughtfully crafted software. With over 20 years of experience as a software developer and engineering leader, he has helped shape and mentor teams across industries, always with a deep focus on software craft and building beautiful, maintainable code.

Joe is co-author of *The Well-Grounded Rubyist* and a respected voice in the Ruby community, frequently sharing insights on engineering leadership, AI-driven development, and sustainable software practices. Joe is committed to ensuring that automation serves as a tool for augmenting human creativity, improving collaboration, and sustaining the craft of software engineering.

Area of Expertise

  • Business & Management
  • Finance & Banking
  • Government, Social Sector & Education
  • Information & Communications Technology

Topics

  • Software Craftsmanship
  • Ruby Development
  • Software Engineering
  • Software Development
  • Open Source Software
  • Software Engineering Management

Silent Killers: Lessons from the Brink

Every Rails app starts with a solid foundation, but as features evolve and teams change, even the best projects can drift toward complexity. Over time, code that once felt effortless can become tangled, slow, and hard to maintain. This talk dives deep into what truly degrades a Rails application over time. We’ll explore practical ways to diagnose the health of a codebase, including underutilized metrics beyond test coverage and churn. Along the way, I’ll share battle-tested strategies for bringing struggling Rails apps back to life without a painful rewrite.

Joe Leo

CEO, Def Method and Co-author, The Well-Grounded Rubyist

New York City, New York, United States

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