Tinder migrated to Elasticsearch 8 to modernize its recommendation system, improving operability and maintainability while addressing challenges from legacy technology. The migration focused on leveraging new features for personalized user experiences and optimizing performance, ultimately empowering engineering teams with a self-service platform for enhanced innovation.

The article discusses the migration of over 30 Kubernetes clusters to Terraform, detailing the challenges faced with previous tools like Sceptre and AWS CDK, and outlining a structured, iterative approach to the transition. Key strategies included automating processes, ensuring safety during rollbacks, and emphasizing hands-on knowledge transfer over traditional documentation. The authors share insights on tooling, risk management, and team collaboration throughout the migration journey.