Author of picocli (http://picocli.info/). BY DAY: Algo Development at SMBC Nikko Securities. BY NIGHT: Log4j 2 performance hacker. I made Log4j 2 garbage-free, and contributed Async Loggers, which have 10x more throughput and orders of magnitude lower latency in multi-threaded scenarios compared to current market-leading logging packages log4j-1.x and logback. Responsible for most of the performance improvements since Log4j 2.0-beta4. FOR FUN: Learn new stuff: performance, concurrency, scalability, low latency, AI, machine learning, cryptography, bitcoin and cryptocurrency technologies.