Yoann Ciabaud is an architect/developer with strong application architecture skills in Java/JEE, integration, and database environments. While mainly focused on application architecture, design, and development, Yoann also has extensive skills in infrastructure (networks, server, and operating systems) and the design, build, and configuration of development, test, and production environments.

He is currently working for an electronic financial transaction company called Monext in France. Including other project and line roles, Yoann has worked in large (more than 50) and small (sole team member) teams on complex distributed architectures based on a wide range of technologies.

Andrey Pokhilko is well known as the founder of JMeter-Plugins.org, an open source project that has been enhancing the JMeter user experience since 2009. While working on this project, he also led Load Testing Group at search giant Yandex (NASDAQ: YNDX), a position that provided him with invaluable experience in high-load performance testing. At Yandex, he developed the updated version of Yandex.Tank, an open source load testing tool.

Keen to apply his ideas to a wider range of load testing problems, Andrey left Yandex in 2014 to focus on building Loadosophia.org, a start-up that provides load test results analysis as a service.

Shantonu Sarker is a freelance software test automation engineer, currently working for oDesk/Elance/Staff.com. As a consultant, he works as a trainer in BITM (an institute of BASIS) and as an automation tester for several reputed companies in Bangladesh. He has his own start-up company named QualitySofts.

He has attended three professional training courses provided by BASIS (Bangladesh Association for Software and Information Services) on OOP, OOAD, and software design and architecture. He also has training in Agile development and testing (Kanban and Scrum) and security testing. He is also learning to speak Japanese and has passed the JLPT-L4 exam.

He has previously reviewed Performance Testing with JMeter 2.9, Packt Publishing.

Federico Diaz Valpuesta is a Linux systems administrator currently living in Seville, Spain. He has extensive experience in the administration of local area networks and Linux servers.

He has been using Linux since 1999, starting with RedHat 7.2, and currently uses Debian. He has learned to use all the various "flavors" of Linux when he needs to solve a problem, so he usually installs Debian for web servers, CentOS for clustering, and Zentyal for small LANs, user management, and file/printer sharing.

Right now, he is working as a freelance web developer, deploying web apps in AWS, DigitalOcean, and Hetzner. He lends a hand in virtualization and helps everyone who wants to get started with Linux.

In addition to trying new things on his computer for long hours, he also likes mountain biking and watching TV. You can follow his activities on his blog or Twitter.

Źmicier Žaleźničenka holds a Master of Science degree in Computer Science from Delft University of Technology, the Netherlands. He is currently working as a software developer at TomTom in Amsterdam. His areas of interest include search engines, application monitoring software, and performance optimization of large-scale web applications. He has worked closely with JMeter, both during his studies and day-to-day development activities.