Paul is the author of Hacking with Swift, Pro Swift, Swift Design Patterns, Server-Side Swift, Hacking with macOS, Hacking with watchOS, Hacking with tvOS, Swift Coding Challenges, and more. Suffice it to say, he quite likes Swift. And coffee. (But mostly Swift.) (And coffee.)

Doug is a leading mobile developer advocate and evangelist.

He is widely known as an expert in mobile application architecture, especially when it comes to performance. Doug has worked with thousands of developers around the world, helping them improve the speed, battery life and customer satisfaction of their applications (both native and web). The author of O'Reilly's "High Performance Android Apps", he has spoken at conferences around the world on mobile performance.

He is currently freelancing, and traveling with his family of 6 (plus the dog!) as a digital nomad in Europe.

Royi Benyossef is the ecosystem relations manager at Samsung NEXT TLV, an early stage investment and innovation arm that focuses on software and services. Royi is also an Android Google expert since 2013 with a vast experience as an Android evangelist on stages that included 4YFN/MWC, Google I/O, AppsWorld, DroidCon, CodeMotion, BABBQ and more. Prior to joining Samsung, Royi was the Android group leader at Vidmind where he managed a multinational group of engineers in designing and building Android clients for Vidmind’s OTT platform as well as proprietary Android based Smart TVs and STBs with Hisense.

Yonatan is a co-founder and CTO of KolGene, being on a mission to make genetic tests usage optimized, accessible and affordable worldwide.

Previously, at Gett, which to date has raised almost $650 million in VC funding — he was the Head of Android, helping make it the world's largest on-demand transportation, delivery, and logistics company.

One of his greatest passions is helping people to learn and adopt new technologies.

As a result, he founded and now co-leads one of the largest, most active, gender diverse Android community in the world: Android Academy in Tel Aviv. 3500 members so far and they continue introducing hundreds of engineers to Android technology every year.

As a dev, Yonatan's primary expertise is Android and Mobile UX, but he's also friendly to frontend and backend technologies.

Vitaly Friedman loves beautiful content and doesn't like to give in easily. Originally from Minsk, Belarus, he studied computer science and mathematics in Germany where he has discovered his passion for typography, writing and design. After working as a freelancing designer and developer for 6 years, he co-founded Smashing Magazine, one of the largest online magazines dedicated to web design and development. Vitaly is the writer, co-author and editor of both Smashing Books. He is now working as the editor-in-chief of Smashing Magazine in the lovely city of Germany, Freiburg.

Paulina is an Android developer at Droids On Roids. She is actively involved in Android community, co-organizing TOAST, one of the biggest meetups series for Android developers in Wrocław, engaged into GDG & WTM Wrocław community and blogging in her free time. Her passion is traveling around the world.

Graduated from the Faculty of Computational Mathematics and Cybernetics of Moscow State University in 2012. In 2014 with the Any Void team came to work in Yandex where he now leads the development team of mobile Yandex.Maps for iOS.

Developing and maintaining mobile infrastructure at Lyft: build systems, tooling, infra backends, Kubernetes, architecture, libraries.

Contributor/author of following crimes against humanity:

• RxJava;
• Mainframer;
• The Context Podcast;
• Domic;
• Composer/Swarmer;
• StorIO;
• QualityMatters;
• Juno;
• Yandex.Mail;
• etc.

Danny is a mobile developer by heart. He lives and works in Berlin, the city he loves as much as Android.

Danny signed the Software Craftsmanship manifesto as a strong believer in the value of lifelong learning. He dreams in clean code and could speak about unit testing all night. That's also his favorite topic when speaking or writing about Android.

Danny was in charge for Android for eBay's classified business in Germany before moving to Groupon to build a team there bringing mobile to the lives of merchants. Even before Android came along he programmed for mobile phones and every device that could run some kind of Java.

Danny is a Google Developer Expert for Android and Kotlin.

Anton Keks is a software craftsman, co-founder of Codeborne, the only extreme programming shop in the region, frequent speaker at conferences, and a lecturer in Tallinn Technical University. He is also a strong believer in open source software and agile development methodologies, author of a popular network tool — Angry IP Scanner, and a regular contributor to other open source projects.

Before founding Codeborne, Anton has led a team of developers of the award-winning internet-bank of Swedbank for 5 years, gradually introducing agile methods. During this time he has also co-founded Agile Estonia — non-profit organization that holds regular agile conferences in Estonia. During spare time he plays guitar, rides motorbike and travels to remote corners of the world.

Nishant is a Sr. Android Engineer at Soundbrenner in Berlin, Germany and an open source enthusiast who spends his time doodling when not hacking on Android. He is a caffeine-dependent life-form and can be found either talking about Android libraries or advocating that coffee is the elixir of life at community gatherings.

He has been part of 2 startups in the past (Founding Team Member at OmniLabs, Inc. and one of the first employees at Silverpush) with experience in Android SDK Engineering and Audio Digital Signal Processing (DSP) on Android.

While working at his past company (Silverpush), he developed the company's patented UAB (Unique Audio Beacon) Technology.

Started working in iOS development in 2012. Worked on Boom and VK Live projects. In 2016 joined VK, where he works with video and live streaming.

Currently Sergey is an independent Android Engineer and Consultant with the background in backend dev. Co-organiser of the first Kotlin User Group in Russia and Android Academy in St. Petersburg and Moscow, usually speaks about Kotlin and Android. Kotlin early adopter, digital nomad.

Android developer at Jet.com, leading a team of 5 developers whose main focus is to build performant, scalable and cutting-edge Android projects. For the last few months Yuliya has been leading AR development. She is actively involved at C4Q — non-profit organization, which fosters the tech community in NY.

Vladimir Ivanov is now a lead software engineer in EPAM learning to become a Solution Architect. Accomplished Android developer, React Native expert, Certified Google Cloud Architect, mentor and speaker.

Lead software engineer in EPAM. More than 8 years of experience in mobile development, also interested in machine learning and Python. The author of a blog for Software Architects: https://medium.com/@nvashanin.

Odnoklassniki Android application developer. Kirill graduated from St. Petersburg State University, where he studied computer vision and security. He's into Android development since his second year at university. He loves football, table tennis, roller blades, and snowboard.

Started his way as a backend developer and then fell in love with mobile development for its relevance, modernity and young community. For his first Android projects, which Sergey did as a freelancer in his spare time, he and his colleague wrote together the backend part as well. For the last two years, Sergey is an Android developer in Tinkoff company's team of business application.

Fan of mobile technologies, neat architecture and early access programs, Eugene has done a couple of projects with audience of hundreds of thousands of people. Currently he's the team leader of Labirint Android, the first team in Russia to implement Instant App; this team can boast about having a 4,8 score app in Google Play.

Head of Mobile Development at Yandex.Transport. During his career Eugene had experience in science and back-end development on C# and Java. In the last few years he immersed himself deeply into mobile development, especially for Android. He is also one of hosts of the Podlodka podcast.

Artur works at Yandex on Yandex Android application. He's very sensitive about the quality of applications he develops. He has no intentions to switch to Kotlin and always makes slides in Java. He's a conference speaker and also organizes GDG & KUG SPB meetups.

Kirill has been working in mobile development for quite a long time, having tried Windows Mobile, Android, Windows Phone, and iOS. In the end, iOS won his heart once and for all. Kirill played his part in development of the top-rated applications of Russian App Store.

Alexey has been working in development for 5 years. Since 2017 he works on Avito iOS app. Since 2018 he's a part of the messenger unit in his company. He likes studying computer science, contributing to open source, doing pet projects, managing meetups. He's also a sound engineer of Podlodka Podcast.

iOS developer, creator of the Clever game (vk.com). He also organizes CocoaHeads meetups and manages his own projects.

Victoria graduated from Novosibirsk State University, Information Technologies division, and finished her postgraduate studies at A. P. Ershov Institute of Informatics Systems. Since 2006 she's a C++, .NET, Oracle developer. Since 2010 she works with iOS (business applications, games, image analysis).

A professional developer of mobile applications since 2010, Evgeny got working experience in various types of companies: custom development startups, product development startups, big holding companies. Since 2014 he works in Avito as a leader of a team focused on iOS and Android mobile architecture. He's a Program Committee member of such conferences as AppsConf (since 2016) and Mobius (since 2017).