Maintainable

Maintaining software over time rarely fails because of one bad decision. It fails because teams stop getting clear signals… and start guessing.In this episode, Robby talks with Lucas Roesler, Managing Partner and CTO at Contiamo. Lucas joins from Berlin to unpack what maintainability looks like in practice when you are dealing with real constraints… limited context, missing documentation, and systems that resist understanding.A big through-line is feedback. Lucas argues that long-lived systems become easier to change when they provide fast, trustworthy signals about what they are doing. That can look like tests that validate assumptions, tooling that makes runtime behavior visible, and a habit of designing for observability instead of treating it as a bolt-on.The conversation also gets concrete. Lucas shares a modernization effort built on a decade-old tangle of database logic… views, triggers, stored procedures, and materializations… created by a single engineer who was no longer around. With little document

Rewrites are seductive. Clean slates promise clarity, speed, and “doing it right this time.” In practice, they’re often late, over budget, and quietly demoralizing.In this episode of Maintainable, Robby sits down with Brittany Ellich, a Senior Software Engineer at GitHub, to talk about a different path. One rooted in stewardship, readability, and resisting the urge to start over.Brittany’s career began with a long string of rebuild projects. Over time, she noticed a pattern. The estimates were wrong. Feature development stalled. Teams burned energy reaching parity with systems they’d already had. That experience pushed her toward a strong belief: if software is in production and serving users, it’s usually worth maintaining.[00:00:57] What well-maintained software actually looks likeFor Brittany, readability is the first signal. If code can’t be understood, it can’t be changed safely. Maintenance begins with making systems approachable for the next person.[00:01:42] Rethinking technical debtShe explains how h

Kent Beck: You’re Ignoring Optionality… and Paying for ItIn this episode of Maintainable, Robby speaks with Kent Beck, a foundational voice in modern software development and author of Tidy First?. Kent joins from California to explore why optionality is a central, often underestimated dimension of maintainable software.Kent begins by describing the tension between features and future flexibility. Shipping new capabilities is easy to measure. Creating options for what comes next is not. That imbalance is where maintainability either flourishes or collapses. Senior developers in particular must learn to navigate this tension because they have lived through the consequences when no one does.They reflect on how cost models have shifted across the last five decades. Early in Kent’s career, computers were expensive and programmers were cheap. Today the balance often flips depending on scale. At massive scale, electricity and compute time become meaningful costs again. That variability shapes whether teams optimize

Episode Highlights[00:00:48] What Makes Software MaintainableDon explains why unnecessary complexity is the biggest barrier to maintainability, drawing on themes from A Philosophy of Software Design.[00:03:14] The Cost of Clever AbstractionsA real story from a Node.js API shows how an unused abstraction layer around MongoDB made everything harder without delivering value.[00:04:00] Shaping Teams and Developer ToolsDon describes the structure of the Searchcraft engineering team and how the product grew out of recurring pain points in client projects.[00:06:36] Reducing Complexity Through SDK and Infra DesignWhy Searchcraft intentionally limits configuration to keep setup fast and predictable.[00:08:33] Lessons From ConsultingRobby and Don compare consulting and product work, including how each environment shapes developers differently.[00:15:34] Inherited Software and Abandoned DependenciesDon shares the problems that crop up when community packages fall behind, especially in ecosystems like React Native.[00:1

Episode SummaryIn this conversation, Robby sits down with software engineer and author Chris Zetter to explore what building a relational database from scratch can teach us about maintainability, architectural thinking, and team culture. Chris shares why documentation often matters more than perfectly shaped code, why pairing accelerates learning and quality, and why “boring technology” is sometimes the most responsible choice. Together they examine how teams get stuck in local maxima, how junior engineers build confidence, and how coding agents perform when asked to implement a database.Episode Highlights[00:01:00] What Makes Software MaintainableChris explains that well-maintained software is defined by how effectively it helps teams deliver value and respond to change. In some domains—like payroll systems—the maintainability burden shifts toward documentation rather than code organization.[00:03:50] Documentation vs. Code CommentsHe describes visual docs, system diagrams, and commit–ticket links as more du

Maintaining consistency across a sprawling codebase is one of the hardest challenges in software engineering. Denis Rechkunov, a Principal Software Engineer at Elastic, joins Robby to share how his team turned consistency into a cultural practice rather than a technical checklist. From managing open source projects with hundreds of contributors to experimenting safely with new patterns, Denis believes maintainability begins with shared ownership, not just clean code.He explains how Elastic introduced automation and linters to improve cohesion without discouraging creativity. Instead of enforcing perfection across the entire system, Denis’ team scopes their changes to manageable areas and rewards steady progress over sweeping rewrites. Their annual “On Week” tradition gives engineers space to fix what frustrates them most, showing how small, focused bursts of work can produce big leaps in stability and morale.The conversation also explores the human side of maintainability. Denis recalls early lessons about un

Episode NotesThe discussion moves into how standards evolve beyond tools, the trade-offs of monocultures vs. consensus-driven teams, and why ownership matters when the original authors move on. Nathan also unpacks the cost of neglect, describing defects as anything that slows developers down—not just issues that impact end users.Later in the conversation, Nathan recounts a migration from a React SPA to Turbo and Stimulus that removed barriers between designers and developers. He highlights how keeping all problems on the radar together prevents teams from falling into local optima. The episode closes with reflections on TestBench, blind spots in testing, continuous improvement in remote teams, and advice for developers who feel stuck raising maintenance concerns.Episode Highlights[00:01:07] Defining Well-Maintained Software: Nathan shares his three key markers—up-to-date dependencies, adherence to team standards, and fixing defects immediately.[00:02:53] From Tools to Tacit Knowledge: Why norms start with too

Taylor Otwell, creator of Laravel and CEO of Laravel LLC, joins Robby to reflect on his 14-year journey building and maintaining one of the most popular web frameworks in the world. From its PHP 5.3 origins to a full-time business with a 70-person team, Taylor shares what he's learned about code maintainability, developer experience, and what it means to evolve without overcomplicating things.He discusses the importance of simplicity in software design, why sticking to framework conventions leads to better long-term outcomes, and how his minimalist mindset continues to shape Laravel today. Taylor also opens up about the moment he felt out of ideas, how Laravel’s 2024 funding round marked a new chapter, and what it’s like to hand off more responsibility while staying involved in the open source core.Episode Highlights[00:01:07] Taylor’s Definition of Maintainable Software  Simplicity, understandability, and confidence in making changes are key themes in Taylor's approach to longevity in software.[00:02:13] Ken

Robby is joined by Sara Jackson, Senior Developer at thoughtbot, to explore the practical ways teams can foster resilience—not just in their infrastructure, but in their everyday habits. They talk about why documentation is more than a chore, how to build trust in test suites, and how Chaos Engineering at the application layer can help make the case for long-term investment in maintainability.Sara shares why she advocates for writing documentation on day one, how “WET” test practices have helped her avoid brittle test suites, and why she sees ports as a powerful alternative to full rewrites. They also dive into why so many teams overlook failure scenarios that matter deeply to end users—and how being proactive about those situations can shape better products and stronger teams.Episode Highlights[00:01:28] What Well-Maintained Software Looks Like: Sara champions documentation that’s trusted, updated, and valued by the team.[00:07:23] Invisible Work and Team Culture: Robby and Sara discuss how small documentati

CTO coach Joel Chippindale joins Robby to share what he's learned over two decades of building and leading software teams. Joel argues that maintainability has less to do with “clean code” and more to do with how teams communicate, prioritize, and make progress visible. Drawing on his time at Unmade and his current coaching practice, Joel outlines practical ways teams can build trust, navigate brittle systems, and stop letting technical debt conversations get lost in translation.Episode Highlights[00:01:10] A Working Definition of MaintainabilityJoel explains why “software that’s easy to keep changing” is the gold standard—and why context matters as much as code.[00:05:24] The Pitfalls of Pre-OptimizationHow developers can trap themselves by designing for futures that may never arrive.[00:10:40] Challenging the Iron TriangleJoel pushes back on the idea that teams must sacrifice quality for speed or cost.[00:15:31] Quality Is a Team ConversationWhy code quality starts long before you open your editor.[00:20:00

Melanie Sumner: Why Continuous Accessibility Is a Strategic AdvantageMelanie Sumner, Product Accessibility Lead for Design Systems at HashiCorp, joins Robby to talk about what it takes to scale accessibility across legacy products—and how aligning design and engineering processes creates lasting change. Melanie shares her work making Ember.js more accessible, her team’s philosophy behind their design system, and why she treats accessibility like any other technical concern.From the pitfalls of nested interactive elements to the strengths of Ember's conventions and codemods, this conversation offers a roadmap for integrating accessibility into every layer of product development.Melanie also reflects on why she trademarked the term Continuous Accessibility, how it fits into product lifecycles, and what other frameworks can learn from the Ember community’s approach.“Accessibility is a technical problem with a technical solution.”Melanie joins us from Chicago, Illinois.Episode Highlights[00:01:00] What Well-Maint

In this episode of Maintainable, Robby speaks with Joe Masilotti, an independent consultant who helps Rails teams ship mobile apps using Hotwire Native.Joe shares his perspective on what makes software maintainable—especially for consultants who need to onboard quickly. He explains why setup scripts often add unnecessary complexity, and how he evaluates a project’s maintainability by how quickly he can go from clone to coding.Robby and Joe also discuss how hybrid mobile development can offer faster delivery, fewer bugs, and better long-term flexibility—especially when teams reuse their existing Rails web views. Joe explains how Hotwire Native allows teams to incrementally introduce native features without rewriting their entire app.Whether you’re maintaining a mobile shell built two years ago or just starting to explore native development, Joe offers actionable advice on setting expectations, scoping client work, and navigating modern mobile tech stacks.⏱️ Episode Highlights[00:01:17] Onboarding as a Measure

Freedom Dumlao (CTO at Vestmark) joins Robby to explore what it means to maintain software at scale—and why teams sometimes need to unlearn the hype.With two decades of experience supporting financial systems, Freedom shares how his team manages a Java monolith that oversees $1.6 trillion in assets. But what’s most surprising? His story of how a team working on 70+ microservices rebuilt their platform as a single Ruby on Rails monolith—and started shipping faster than ever before.Episode Highlights[00:02:00] Why Respecting Legacy Code MattersFreedom reflects on a lesson he learned at Amazon: "Respect what came before." He discusses the value of honoring the decisions of past developers—especially when their context is unknown.[00:05:00] How Tests Help (and Where They Don’t)Freedom discusses how tests can clarify system behavior but not always intent—especially when market logic or business-specific rules come into play.[00:07:00] The Value of Understudies in EngineeringFreedom shares how his team intentionall

Mercedes Bernard, Staff Software Engineer at Kit, joins Robby to talk about what it really means to write code that lasts—and who it should be written for.In this episode of Maintainable, Mercedes shares a thoughtful and practical perspective on working with legacy codebases, managing technical debt, and creating a team culture that values maintainability without fear or shame. Her guiding principle? Well-maintained software is friendly software—code that is understandable and approachable, especially for early-career developers.Together, they discuss how to audit and stabilize older systems, avoid full rewrites, and create consistent developer experiences in large applications. Mercedes reflects on her decade in consulting and how that shaped her approach to navigating incomplete documentation, missing historical context, and multiple competing patterns in a codebase. She breaks down different types of technical debt, explains why not all of it is inherently bad, and offers strategies for advocating for main

Evan Phoenix (@evanphx), CEO of Miren, joins Robby to explore the subtle but powerful difference between writing code that works and writing code that explains itself. They discuss the role of clarity in maintainable systems, why splitting a monolith can backfire, and what developers can learn from artists and tradespeople alike.Episode Highlights[00:01:30] What Makes Software Maintainable?Evan defines maintainability as how easily a newcomer can make a change with minimal context.[00:02:30] Why Business Logic Should Be ObviousA discussion on domain knowledge leakage and abstracting rules like “can we sell today?”[00:05:00] Programming 'Mouthfeel' and the Trap of PrefactoringEvan explains why prematurely optimizing for reuse can lead to unnecessary complexity.[00:07:00] When to Extract Logic: The Copy/Paste SignalA practical approach to identifying reusable components by spotting repeated code.[00:08:00] Technical Debt as a Reflection of Cognitive LoadWhy forgetting your own code doesn’t automatically mean it

Software isn’t always about rapid iteration. Sometimes, the real challenge lies in carefully assessing the existing environment. Chris Salvato, a Senior Staff Engineer at Shopify, believes that spending time in the “problem space” is vital for any long-lived application. Rather than diving immediately into controllers and tests, he begins by talking to everyone who interacts with the code—engineers, product owners, even directors who oversee strategy. This approach reveals hidden friction points that rarely come to light in larger, more formal meetings.When code grows organically over years, a range of issues emerges. Small workarounds might accumulate, new features can overlap with older ones, and domain boundaries become murky. Chris suggests mapping these overlaps through in-depth conversations so the team can pinpoint what genuinely obstructs productivity. He emphasizes that many developers may focus on surface fixes—updating a library here, renaming a class there—without acknowledging underlying confusio

Heimir Thor Sverrisson joins Robby to discuss the importance of software architecture in long-term maintainability. With over four decades in the industry, Heimir has witnessed firsthand how poor architectural decisions can set teams up for failure. He shares his experiences mentoring engineers, tackling technical debt, and solving large-scale performance problems—including one bank’s misguided attempt to fix system slowness by simply adding more CPUs.Heimir also discusses his work at MojoTech, the value of code reviews in consulting, and his volunteer efforts designing radiation-tolerant software for satellites.Episode Highlights[00:01:12] Why architecture is the foundation of maintainability – Heimir explains why starting with the wrong architecture dooms software projects.[00:02:20] Upfront design vs. agile methodologies – The tension between planning and iterative development.[00:03:33] When architecture becomes the problem – How business pivots can render initial designs obsolete.[00:05:06] The rising de

Not every messy piece of code needs a refactor. Noémi Ványi, Senior Software Engineer at Xata, joins Robby to discuss how to develop the intuition to know when refactoring is truly necessary and when it’s just unnecessary churn. She shares her approach to balancing pragmatism and maintainability, how product teams and developers can work better together, and why developer autonomy is key to sustainable software.Drawing from her experience working on both open-source and closed-source projects, Noémi reflects on the unique challenges each presents—whether it's dealing with unresponsive GitHub issue reporters, handling unanticipated user behaviors, or navigating large-scale refactors in existing systems. She also shares her philosophy on technical debt: not all of it needs to be paid down, and some of it can actually be strategic.Robby and Noémi also explore the importance of writing meaningful commit messages, the hidden benefits of reviewing open-source pull requests, and why developers should stop waiting fo

How much can legacy code tell us beyond just functionality? Julia López, Senior Software Engineer at Harvest, believes that even small details—such as white spaces, variable names, and formatting choices—can reveal a system’s history.In this episode, Julia and Robby discuss the importance of refactoring and how a strong engineering culture can make or break a team's ability to maintain and improve software over time. Julia shares her experience leading a multi-year overhaul of Harvest’s billing system, balancing stakeholder expectations while ensuring the rewrite delivered real value.They explore how refactoring decisions evolve as teams grow, how to mentor newer developers to feel empowered to make changes, and why Julia doesn’t always trust her own estimations (for good reason). She also opens up about the complexities of transitioning a live billing system while supporting customers, finance teams, and engineering operations—all without disrupting payments.Beyond technical decisions, they also dive into th

Episode OverviewMarty Haught joins Robby to discuss the sustainability of open-source projects, the challenges of maintaining RubyGems, and why the metaphor of technical debt may not fully capture how software ages. Instead, he suggests thinking of it as drift—the natural misalignment of software with its evolving purpose over time.They also dig into security challenges in package management, including how Ruby Central worked with Trail of Bits to audit RubyGems. Marty also shares insights on the EU Cyber Resilience Act and how it might affect open-source maintainers worldwide. Finally, they explore how companies can support open-source sustainability through corporate sponsorships and individual contributions.Topics Discussed[00:01:00] The two pillars of maintainable software: good tests and readability.[00:02:40] From Perl to Ruby: How readability changed Marty's approach to programming.[00:07:20] Is technical debt the right metaphor? Why "drift" might be a better fit.[00:11:00] What does it take to maintai