The author of this article is a software engineer who co-founded devRant, a community platform for developers. The author explains how they chose Neo4j as their primary and only data store due to its scalability, flexibility, and performance. They describe the challenges of using relational databases in this context, such as scalability issues with votes on rants and comments. In contrast, Neo4j's graph database structure allows for rapid development, efficient querying, and scalability. The author highlights the benefits of using a graph database in rapidly growing technical startups, including flexibility for new features and queryable analytics. They also demonstrate how Neo4j can be used to create complex algorithms surrounding their data, such as collaborative filtering for content feeds. Overall, the article showcases the advantages of using Neo4j for building scalable and flexible applications.