Max Verbeek contributed to the argoproj/argo-cd repository by implementing HTTP/2 enforcement in the HTTP client when a custom TLS configuration is applied. Using Go, Max focused on backend and API development, ensuring that the client negotiates HTTP/2 connections for improved throughput and lower latency with compatible servers. This technical approach addressed the need for more efficient and reliable communication under TLS, reducing fallback to HTTP/1.1 and supporting faster synchronization and responsiveness in the API and UI. The work demonstrated a solid understanding of protocol negotiation and testing, resulting in a targeted, high-impact feature within a complex codebase.