Hey! I'm Peter.

Two months ahead of the official release of Spring Framework 7 and Spring Boot 4, let's take a brief look at the changes and what the Spring team is focusing on.

Spring AI is a framework that simplifies integration with AI, supporting structured prompts and dependency injection. It offers a simple API and prompt templates, improving development efficiency over complex REST calls.

I successfully applied a WebSocket-based chat system learned from a carrot developer to a 20 Questions game team project. Implementing a producer-consumer pattern message queue system solved concurrency issues in multi-user chat, providing stable socket communication with singleton pattern and thread-safe design.

We looked back on 2025, which was new and busy enough to conduct a retrospective.

I switched from Python to Go in AWS Lambda to solve the Cold Start problem. Although it was a simple switch, it reduced run time by more than 80%, allowing us to provide an excellent user experience.