Duck Conf 2026, Maria Mokbel, technical legacy, startup challenges, engineering leadership, Billy, tech lead, legacy management --- ## Introduction In the fast-paced world of startups, technology evolves at lightning speed, yet many organizations find themselves grappling with a formidable foe: legacy systems. During the recent Duck Conf 2026, Maria Mokbel, a founding engineer and tech lead at Billy, shared invaluable insights into managing technical legacy issues that can accumulate in just a couple of years. Her presentation highlighted the strategies and frameworks her team employed to navigate these challenges, illustrating how startups can effectively "tame the legacy" while fostering innovation. ## Understanding the Legacy Challenge ### What is Technical Legacy? Technical legacy refers to outdated systems, codes, or practices that linger within an organization. As startups scale, they often accumulate technical debt — a term used to describe the future costs incurred by choosing an easy solution now instead of a better approach that would take longer. This debt can lead to increased complexity, reduced agility, and hindered growth. ### The Rapid Accumulation of Legacy in Startups In her talk, Mokbel emphasized that legacy issues can arise surprisingly quickly, particularly in startup environments where agility is paramount. The fast-paced nature of development can result in rushed decisions, leading to a tangled web of outdated practices and technologies. In the case of Billy, the team faced significant legacy challenges within just two years of launching their platform. ## Strategies for Taming Technical Legacy ### 1. Establishing Clear Documentation Practices One of the first steps to managing legacy effectively is establishing robust documentation practices. Mokbel explained how her team prioritized comprehensive documentation from the outset. By creating detailed records of code changes, system architecture, and development processes, the team ensured that knowledge was not siloed and could be easily accessed by all members. This practice not only mitigated the impact of legacy but also facilitated onboarding for new engineers. ### 2. Implementing Modular Architecture Mokbel advocated for a modular architecture as a key strategy in managing legacy issues. By breaking down the system into smaller, manageable components, her team could isolate and address legacy parts without overhauling the entire platform. This approach not only improved maintainability but also allowed for faster iterations and testing of new features. ### 3. Prioritizing Refactoring Refactoring — the process of restructuring existing computer code without changing its external behavior — emerged as a crucial tactic in Mokbel's strategy. The team at Billy adopted a culture of continuous refactoring, where engineers were encouraged to improve existing code as part of their regular workflow. This proactive approach not only helped reduce technical debt but also fostered a mindset of quality and excellence among the engineering team. ### 4. Leveraging Automation Tools In her presentation, Mokbel highlighted the importance of leveraging automation tools to streamline processes and reduce the burden of legacy management. By automating testing, deployment, and monitoring, the team minimized manual errors and freed up time for engineers to focus on more critical tasks. Automation tools also provided valuable insights into system performance, helping the team identify and address legacy issues before they escalated. ## Building a Legacy-Conscious Culture ### Emphasizing Collaboration Mokbel underscored that managing legacy is not solely the responsibility of engineers; it requires a collaborative approach across all teams within a startup. By fostering open communication between engineering, product, and operations, companies can create a culture that prioritizes quality and legacy management. Regular cross-functional meetings can help identify potential issues early, ensuring that legacy challenges are addressed collectively. ### Encouraging Continuous Learning Another pivotal element Mokbel discussed was the significance of continuous learning and professional development. By investing in training and development programs, startups can equip their teams with the latest skills and knowledge needed to tackle legacy challenges effectively. This investment not only bolsters the team's capability to manage legacy but also enhances employee satisfaction and retention. ## Conclusion The insights shared by Maria Mokbel at Duck Conf 2026 serve as a wake-up call for startups navigating the turbulent waters of technical legacy. By implementing clear documentation practices, modular architecture, continuous refactoring, and automation tools, teams can effectively tame the legacy that often accumulates in the early stages of growth. Furthermore, fostering a legacy-conscious culture through collaboration and continuous learning is vital for long-term success. As startups continue to innovate in an ever-evolving landscape, understanding and managing legacy will be key to achieving sustainable growth and remaining competitive. In this age of rapid technological advancement, startups must not only build but also maintain a robust foundation that allows them to thrive amid challenges. The journey to manage legacy is ongoing, but with the right strategies in place, startups can turn potential pitfalls into stepping stones for success. Source: https://blog.octo.com/duck-conf-2026-cr-apprivoiser-le-legacy-en-startup-1