Why You Don't Need That New Library - Chaos Engineering 2025

This conference talk from Conf42 Chaos Engineering 2025 explores when to build custom solutions instead of adopting new libraries. Denis Ermakov shares his experience at TechFlow, where his team evaluated NextAuth.js for authentication needs but ultimately built a custom solution. Learn about the decision-making process, including analyzing data flow requirements, calculating the true cost of alternatives, and determining when simplicity outweighs the overhead of integrating third-party libraries. The presentation covers practical examples of authentication implementation, demonstrates how to evaluate technology choices objectively, and provides actionable guidance for making similar decisions in your own projects.