Cindy Sridharan is a distributed systems engineer, O'Reilly author, and influential technical writer based in San Francisco. Known online as @copyconstruct, she wrote the seminal O'Reilly book 'Distributed Systems Observability' and runs the Systems Distributed newsletter on Substack. She is widely respected for her long-form thinking on observability, testing in production, microservices architecture, and engineering culture. She spent years as an engineer at imgix, led the Prometheus user group in San Francisco, and has spoken at major industry conferences including QCon and GOTO. Her Medium essays on monitoring, testing, and systems thinking have shaped how a generation of engineers thinks about building resilient software.
Kent C. Dodds is a world-renowned web development educator, open source engineer, and entrepreneur based in Salt Lake City, Utah. Creator of React Testing Library and the Testing Library ecosystem, he left a staff engineering role at PayPal in 2019 to build a self-employed education empire spanning EpicReact.dev, EpicWeb.dev, TestingJavaScript.com, and now EpicAI.pro. Recognized as a Google Developer Expert, Microsoft MVP, and GitHub Star, he has taught tens of thousands of developers through hands-on workshops, books, courses, and his long-running newsletter. Father of six and an adrenaline enthusiast who snowboards and rides a onewheel, Kent believes that kindness and teaching compound faster than any technology trend.
Mat Ryer is a London-based Go programmer, open-source creator, author, and long-time host of the Go Time podcast. Known for building beloved Go tools like xbar (18k+ GitHub stars), moq, and the `is` testing framework, he has been writing Go since before its v1 release. He authored 'Go Programming Blueprints' and spent years as a principal engineer at Grafana Labs building AI agents and observability tools. His characteristic blend of deep technical craft, game-show energy, and dry British wit has made him one of the Go community's most recognizable voices.
Michael Feathers is a software consultant, author, and Chief Architect at Globant whose 2004 book 'Working Effectively with Legacy Code' redefined how developers think about untested code - coining the now-universal definition that legacy code is simply code without tests. With over 25 years consulting hundreds of organizations, he pioneered dependency-breaking techniques that gave teams a way into codebases they feared. Today he explores how AI reshapes programming, writes the 'mechanisms' newsletter on Substack, and continues speaking at conferences worldwide.