Hacktoberfest 2023 at Nylas showcased significant developer engagement, resulting in approximately 25,000 lines of code contributions, including over 30 code samples in JavaScript, Python, Java/Kotlin, and Ruby. Developers utilized Nylas APIs for Email, Calendar, and Contacts through the free sandbox environment, enabling seamless connection and interaction with user data. The event highlighted contributions from developers like Kelsey, Aakash, and Mahmoud, who delivered multiple code samples, demonstrating the ease of building with Nylas' SDKs. Hacktoberfest provided an opportunity for developers to enhance their skills, gain exposure to new languages and APIs, and grow their online presence, while also receiving support and feedback from the Nylas Developer Relations team. Nylas continues to encourage contributions and offers resources like quickstart guides and developer documentation for ongoing engagement.