In building their SaaS company, the author shares insights into their DevOps toolkit, emphasizing the importance of selecting open-source tools that enhance infrastructure management and operations. They discuss their involvement in the open-source community and highlight key tools like Nagios for infrastructure monitoring, the ELK Stack for log analytics, Consul for service discovery, and Jenkins for continuous integration and deployment. The discussion includes the merits and challenges of using Docker in production, Ansible for configuration management, and GitHub for source control management, underscoring the balance between simplicity and functionality. The narrative invites feedback from the DevOps community to further refine tool choices and foster a collaborative environment for improvement.