Diana Pfeil: Building Confidence in Probabilistic Systems

More from Maintainable

1. 

   E227 · 8 Sep 2026 · 1 hr 22 min

   John Athayde: Maintaining the User Side of Software

   The user interface of a long-lived application carries years of technical decisions, design choices, and organizational history. John Athayde joins Robby to explore how teams can untangle that front-end sprawl, and what changes when AI makes it much easier to analyze and rewrite what came before.

2. 

   E226 · 1 Sep 2026 · 54 min

   Kristin Isaac: The Customer Doesn’t Care About Your Technical Debt

   Customers don’t ask you to pay down technical debt. They notice when the product is slow, unreliable, or keeps breaking in the same damn way. Kristin Isaac joins Robby to explore how engineers can translate invisible maintenance work into customer and business impact… and why that skill may become even more important as AI makes software faster to create than to understand.

3. 

   E225 · 18 Aug 2026 · 55 min

   David Hayes: Boring Software, Clear Incentives, and Better Checklists

   David Hayes believes maintainable software starts with a simple idea: fitness for purpose.

4. 

   E223 · 16 Jun 2026 · 55 min

   Chris Coyier: The Long Game of Maintaining CodePen

   Chris Coyier, co-founder of CodePen, joins Robby to reflect on what it takes to maintain software over the long haul. Drawing from CodePen’s 15-plus-year journey, Chris shares lessons about balancing stability with innovation, navigating technical debt, and gradually evolving a product without losing sight of the people who depend on it. They discuss CodePen’s origins, the team’s ongoing migration from Rails to Go, the realities of building with a small engineering team, and why maintainability is often more about people than code.

5. 

   E222 · 5 May 2026 · 56 min

   Sally Lait: Confidence Is the Real Metric

   Sally Lait joins Robby to explore why confidence might be the most important signal of software maintainability. They dig into the cultural dynamics behind legacy systems, why technical debt becomes a people problem, and how teams can move forward without dismissing the work that got them here.

6. 

   E221 · 14 Apr 2026 · 55 min

   Rein Henrichs: The Real Work of Maintenance Happens Before You Touch the Code

   Most teams treat maintenance like a coding problem. Rein Henrichs argues the real work starts much earlier… in how teams understand the system in the first place.

7. 

   E229 · 6 Oct 2026 · 54 min

   Matija Šošić: Abstractions Aren’t Going Anywhere

   What happens to frameworks when generating code becomes cheap enough that nobody particularly cares about the boilerplate anymore? Matija Šošić joins Robby to talk about boring software, abstraction as a form of restraint, Wasp’s decision to abandon its custom DSL, and why AI may make good abstractions more valuable rather than less.

8. 

   E228 · 29 Sep 2026 · 54 min

   José Valim: Designing a Language You Can Maintain for Decades

   What changes when the software you’re maintaining is a programming language that thousands of other applications depend on? José Valim joins Robby to trace Elixir from a frustrating Rails concurrency bug to a language designed for long-term evolution, then looks at how AI is changing documentation, dependencies, coding tools, and open-source maintenance.

9. 

   E220 · 31 Mar 2026 · 55 min

   Russ Olsen: The Hidden Cost of Forgetting Why the Code Looks Like That

   Russ Olsen joins Robby to talk about maintainability, trade-offs, and why so many teams forget to document what they decided not to do. It’s a conversation about legacy systems, rewrites, developer quality of life, and the stories software teams need to tell each other better.

10. 

    E219 · 17 Mar 2026 · 1 hr 1 min

    Joel Oliveira: Predictability Is a Maintainability Feature

    Predictability might be the most underrated feature of maintainable software. Joel Oliveira joins Robby to explore how thoughtful patterns, small refactors, and a bit of stubborn persistence can keep systems healthy long after their first release.

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