Alexei Vinogradov
Alexei Vinogradov
QA, Germany
Consultant / Selenide

Alexei has been working in various IT projects in Germany for more than 15 years. He consults about quality assurance, test automation and about how to keep calm and be a good tester. He is a developer of Selenide, and the founder and moderator of Radio QA podcast. 

Alexei is a passionate speaker who talked at many QA conferences, including SQA Days, Selenium Camp, Selenium Conference, Heisenbug, CodeFest, QA Fest.

Jeremy Keith
Jeremy Keith
Front-end, Ireland
Web-stuff-doer at Clearleft

An Irish web developer, working with Clearleft in Brighton, England.

His online home is adactio.com, where he has been writing for over fifteen years.

You can read his book Resilient Web Design online for free.

Anna Kokhan
Anna Kokhan
Design, Germany
Senior UX/UI Designer at Daimler

Creative-minded designer, passionate about the interactions and trends but also loves transferring complex solutions into a clear UX design. Currently works as a Senior UX/UI Designer at Daimler AG (Mercedes-Benz) in Berlin. 

Anna has 5 years of experience of designing projects for the agencies and startups from all over the world. 


Fernando Cejas
Fernando Cejas
Android, Germany
Software Engineer at IBM Germany

Fernando Cejas is a Software Engineer focused on Mobile Platforms. He has worked for several companies in a wide variety of projects in J2ME, C-Sharp, Java, Php, Ruby, Scala and Kotlin in different contexts: Social networks, NFC/RFID Hardware Solutions, E-Commerce and Music Platforms. 


He has been involved on Android since its appearance and currently as part of his job he advocates developers by exploring new technologies, speaking at conferences and sharing knowledge.

Konrad Dzwinel
Konrad Dzwinel
Front-end, Poland
Front-end Developer at Brainly

Konrad is a front-end developer at Brainly and a Google Developer Expert for Web Technologies. Over the years he worked for various startups, consultancies and software houses building webapps, websites and hybrid apps.

Passionate about developer tools, he built many of his own. The most popular include HTML&CSS extraction tool, SnappySnippet, and a web debugging proxy, Betwixt. Konrad is also a Chrome DevTools contributor and an international speaker.

Gáspár  Nagy
Gáspár Nagy
QA, Hungary
self-employed at Spec Solutions

Gáspár Nagy is the creator and the main contributor of SpecFlow, regular conference speaker, blogger (http://gasparnagy.com), editor of the BDD Addict monthly newsletter (http://bddaddict.com), and co-author of the book "BDD Books: Discovery - Explore behaviour using Examples" (http://bddbooks.com).


Gáspár is an independent coach, trainer and test automation expert focusing on helping teams implementing BDD and SpecFlow. He has more than 15 years of experience in enterprise software development as he worked as an architect and agile developer coach.



Katya Lavrenova
Katya Lavrenova
Design, USA
Senior Interaction Designer at Intuit

Katya currently lives in California holding O-1 extraordinary abilities visa and works as Senior Interaction Designer at Intuit.


She has overall 8 years of experience with interaction and visual design in studios, startups, and enterprises. Loves solving problems, surfing, and motorcycling.

Anastasiia Voitova
Anastasiia Voitova
iOS, Ukraine
Product Engineer at Cossack Labs

- 6 years experience in developing mobile apps;

- 3 years experience in making them more secure :)

- maintaining open-source security library Themis, that allows developers to easily integrate encryption into their apps and infrastructures;

- conducting workshops and consulting teams about data protection design;

- found a formulae mistake in the first edition of Serious Cryptography :D

- never tried coding on F#.



Andrii Matukhno
Andrii Matukhno
QA, Czech Republic
Software Engineer at Microsoft (Skype)

Software Engineer focused on quality and testing processes. Currently works at Microsoft, Skype division (Prague, Czech Republic). 


Andrii has 6+ years of experience in software testing. He is a co-founder of QA Club Kiev - community of software testing engineers. He is passionate about automation and continuous delivery. In his free time he likes travelling, photography and chatting about new technologies, mentoring junior testers. Motto - "It's important to do what you like and never stop learning." 



Ingvar Stepanyan
Ingvar Stepanyan
Front-end, UK
Premature optimization engineer at CloudFlare

Obsessed D2D programmer (Acorn, Babel, ESTree, JSX, etc.), speaker and reverse engineer. Premature optimization engineer at CloudFlare.

Mateusz Herych
Mateusz Herych
Android, Poland
Android guy @ IG

Mateusz is a GDG Kraków co-organizer and a Google Developer Expert for Android.


He works at IG where he uses his Android abracadabras to make financial software better integrated with mobile and more user friendly. Fresh father of twins, writing this bio having a child on his arm.

Mariusz Gil
Mariusz Gil
Back-end, Poland
Co-owner at Source Ministry

Architect and CTO focused on high performance and scalable web applications. Trainer, consulant and conference speaker.

He has been working for several companies on PHP projects for millions of active users, from biggest social network and instant-messaging software in Poland to multi-billion PV content personalization and discovery platform.

Mariusz is also member of 4Developers and PHPcon Programme Commitees and one of core members behind PHPers, open meetups for PHP developers in many cities in Poland. Big-data enthustiast and data-sciencist wannabe. After hours, biker and rock guitarist. 





Nikolay Gorylenko
Nikolay Gorylenko
Back-end, Poland
Java Developer

Java Developer (cloud-native, devops, back-end) with 14 years of experience.

Stan Malkin
Stan Malkin
Back-end, Germany
Founder of IT Challenges & Co-founder of Creativin

Stan has 10 years of commercial experience in development. From simple websites to huge CRM systems. Worked as a standalone developer and as a team leader, project manager. 

He loves to work with brilliant people.