The Top
Event 2016


Mark Allison
GDE for Android

Mark Allison is a GDE for Android and software engineer with over 30 years’ experience.

He is passionate about providing the user with the best possible experience. He has developed both server and client side, most commonly Android on the client side, but with also for iOS, HTML5, Symbian, and J2ME. Mark writes a technical blog ( which focuses on Android UI/UX topics, but often covers more general Android development techniques.

When not being geeky, Mark likes to unwind by hurling abuse at football referees, specifically those who are unkind to his beloved Watford FC with whom he holds a season ticket. He also has a deep love of the chilli pepper and consumes spicy food (his favourite being Indian) at every opportunity! Mark has a deep love of single many whisky - buy him a good whisky and you’ll have a friend for life!

Mark is happily married with a grown up step-daughter and lives in Hertfordshire, UK.

Ana Baotić
Android Software Engineer

During college she focused on various e-learning projects and plagiarism detection, where she first fell in love in Java. After getting her Masters degree in CS, she started developing for Android at the Zagreb-based agency Infinum, working on various projects in the telecommunication, medical and travel industry.

After switching to mobile banking and security, in 2016 she took the role of Technical Manager of Mobile banking. In addition to coding, she loves organizing workshops and working directly with clients, helping to close the gap between the technical and practical in the mobile industry.

Apart from coding and public speaking, she enjoys spending time with her family and traveling.

Jorge Barroso
Android Developer at Karumi & Android GDE

Jorge Barroso is the co-founder and Android developer of Karumi and Android GDE.

Karumi is an intentionally small software development studio headquartered in Madrid and specialized in developing lean and stable native applications and working with teams for improving their skills. Before Karumi, he worked 5 years as a Senior Tech Lead at Tuenti, the leading Spanish social network, and MVNO, part of the Telefonica Group.

At Tuenti, Jorge developed a wide variety of strategic products covering J2ME, Blackberry and especially Android. With over 10 years of software engineering experience, Jorge defines himself as a pragmatic coder who thrives on improving the Android project architecture by being a firm advocate of the concept of semantic code and test development.

He is continuously learning and honing his Android coding skills in an effort to understand and adapt to the evolution and of the internal framework. Jorge is also a seasoned tech conference speaker. He is well known among the Spanish developer community for talks covering the topics of best practices for Android development, Material Design adoption, and optimal application architectures.

Wiebe Elsinga
Lead Developer at Egeniq

Besides being a Google Developer Expert for Android, Wiebe Elsinga is a Lead Developer at Egeniq in The Netherlands.

He has a passion for UX and design. He regularly speaks at Mobile Developer conferences or is giving workshops. And let’s not forget a co-founder/organizer of the GDG Dutch Android User Group.

John Sundell
iOS, indie game & open source developer at Hyper

John makes apps, games & Swift developer tools. He’s been working with iOS since the early days of the SDK, and has built apps & frameworks for companies like Volvo & Spotify.

These days he spends his days working as an iOS developer at Hyper Oslo, and his nights working on several widely used Swift open source projects, such as Unbox, SwiftPlate & Marathon.

Matthias Tretter
Lead Developer at IdeasOnCanvas

Matthias Tretter is the Lead Developer at IdeasOnCanvas, where he works on MindNode for iOS, MacOS and watchOS (

Matthias is passionate about a lot of things, but front and foremost technology, psychology and especially the intersection of both. Therefore he is equally interested in technical aspects of a product, as well as its user experience.

Since MindNode works on all Apple platforms, he and his team have gained a lot of experience in how to share code easily.

Huyen Tue Dao
Android Developer at Trello

Huyen Tue Dao is an Android developer of 7 years and a Google Developer Expert, currently working on the Trello Android team.

A proud graduate of the University of Maryland with a BS/MS in Computer Engineering, she is co-creator of the “Android Dialogs” YouTube channel.

When Huyen is not up late programming, she is often found up late gaming (video, board, card, anything).