Contributors
About the authors

Mario Casciaro is a software engineer and entrepreneur. Since he was a child he's been in love with building things, from LEGO spaceships to programs written on his Commodore 64, his first computer. When in college, he used to work more on side projects than on assignments and he published his first open source project on SourceForge back in 2006, it was around 30,000 lines of C++ code. After graduating with a master's degree in software engineering, Mario worked at IBM for a number of years, first in Rome, then in the Dublin Software Lab. He currently splits his time between Var7 Technologies—his own software company—and his role as lead engineer at D4H Technologies where he creates software for emergency response teams. He is a big supporter of pragmatism and simplicity.

The story of this book starts with you all who are reading this book. You make all our efforts worthwhile. Thanks also to the readers who contributed to the success of the first two editions, providing invaluable feedback, writing reviews, and spreading the word about the book.

Thanks to the Packt team, who worked hard to make this book a reality; thanks to Tom Jacob, Jonathan Malysiak, Saby D'silva, Bhavesh Amin, Tushar Gupta, Kishor Rit, Joanne Lovell.

For this book, I had the honor to work with a team of top-class technical reviewers: Roberto Gambuzzi, Minwoo Jung, Kyriakos Markakis, Romina Miraballes, Peter Poliwoda, Liran Tal, and Tomas Della Vedova. Thanks for lending your expertise to make this book perfect.

Thanks to Hiroyuki Musha who translated the second edition of Node.js Design Patterns to Japanese and improved it in the process.

However, the top of the podium goes to Luciano. It has been a tremendous experience and also an honor coauthoring this book with him. Thank you Luciano for being both a great professional and an all-around great person. Hopefully, we'll have the chance to work again together in the future.

Thanks to my Dad, Mom, Alessandro, and Elena for being there for me even if we are far away.

Finally, I'd like to say a heartfelt thank you to Miriam, the love of my life, for inspiring and supporting me in all my endeavors. There are still many more adventures awaiting us. And to Leonardo, thanks for filling our life with joy. Your dad loves you very much.

Luciano Mammino was born in 1987, the same year Super Mario Bros. was released in Europe, which, by chance, is his favorite game! He started coding at the age of 12, hacking away with his father's old i386 armed only with MS-DOS and the QBasic interpreter. Since then he has been a professional software developer for more than 10 years. Luciano is currently wearing the hat of principal software engineer at FabFitFun in Dublin where he builds microservices and scaling applications for millions of users.

Luciano loves the cloud, full-stack web development, Node.js, and serverless. Among other things, Luciano runs Fullstack Bulletin (fstack.link), a weekly newsletter for ambitious full-stack developers and Serverlesslab.com, bespoke training courses to foster serverless adoption.

The biggest thanks of all goes to Mario Casciaro for involving me in such an amazing project. It has been a fantastic journey and I have definitely learned and grown a ton while working together. I do hope there will be many other chances to work together!

This book was possible, thanks to the hard work of the team at Packt, especially Saby, Tushar, Tom, Joanne, Kishor, Jonathan, and Bhavesh. Thanks for bearing with us for almost a year, and thanks to everyone else at Packt for supporting 3 editions of this book!

A huge thanks go to our talented reviewers. Without their true-hearted supervision and their invaluable recommendations, this book wouldn't be something I could be proud about: thanks Romina, Kyriakos, Roberto, Peter, Tomas, Liran and Minwoo. I will be forever grateful for your help.

A special thanks to Padraig O'Brien, Domagoj Katavic, Michael Twomey, Eugen Serbanescu, Stefano Abalsamo, and Gianluca Arbezzano for providing a great deal of support along the way, and for letting me borrow their expertise when I needed some extra piece of feedback on the content of this book.

My gratitude goes to my family, who raised me and supported me in every possible way along my journey. Thanks, Mom, for being a constant source of inspiration and strength in my life. Thanks, Dad, for all the lessons, the encouragement, and the pieces of advice. I do miss them in my life. Thanks to Davide and Alessia for being present in all the painful and the joyful events of life.

Thanks to Franco, Silvana, and their family for supporting many of my initiatives and for sharing their wisdom with me.

Kudos to all the readers of the second edition, especially, the ones that went a step further and left reviews, reported issues, submitted patches, or suggested new topics. Special praise goes to Vu Nhat Tan, Danilo Carrabino, Aaron Hatchard, Angelo Gulina, Bassem Ghoniem, Vasyl Boroviak, and Willie Maddox. Thanks also to Hiroyuki Musha for translating this book to Japanese and for finding many opportunities to improve the content of the book. You are my hero!

Thanks to my friends for promoting this book and supporting me: Andrea Mangano, Ersel Aker, Joe Karlsson, Francesco Sciuti, Arthur Thevenet, Anton Whalley, Duncan Healy, Heitor Lessa, Francesco Ciula, John Brett, Alessio Biancalana, Tommaso Allevi, Chris Sevilleja, David Gonzalez, Nicola del Gobbo, Davide De Guz, Aris Markogiannakis, and Simone Gentili.

Last, but not least, thanks to my partner Francesca. Thanks for the unconditioned love and for supporting me on every adventure, even the craziest ones. I look forward to writing the next chapters of our book of life together!