About the Reviewers

Wen Gu has worked at several industry leading technology companies. He led the effort to create large-scale Continuous Integration and Continuous Delivery platforms and solutions to drive the adoption of Continuous Integration and Continuous Delivery.

Oleksandr Tkachuk has more than 15 years of experience. He has been working as a software engineer and is responsible for full life cycle development of next-generation software, from initial requirement gathering, planning, and analysis to design, coding, testing, documentation, and implementation.

He graduated from Lviv Polytechnic National University, Ukraine, with a master's degree in computer systems and networks.

He worked as a Senior Developer, Team Leader, Solution Architect, Solution Architect, and also worked in Ukraine, UK, and Germany IT companies.

This is his first reviewed book.

Rui Vil?o and Olga Filipova are a happy couple of software engineers and travelers currently living in Berlin. Rui is originally from Coimbra, Portugal, and Olga is from Kiev, Ukraine.

Both Rui and Olga are technical cofounders of a non-profit online education project called EdEra based in Ukraine. Besides that, Olga is a lead software engineer at a fintech company called OptioPay based in Berlin, and Rui is a lead software engineer at an online fitness company called Gymondo based in Berlin.

They live in Berlin since 2014; before that, they lived in Portugal, where both graduated as masters in computer science and worked for 5 years at Feedzai--the most successful Portuguese startup that prevents fraud all over the world.

Olga is author of Learning Vue.js 2 and Web development with Vue.js, Bootstrap, and Firebase, and Rui unofficially reviewed both these books.