Mats Bryntse

Bryntum AB

Mats is the founder of Bryntum and has been making JavaScript UI components and dev tools the last 10 years. Before this, Mats lived a normal life. Now his time is mainly spent creating advanced and reusable UI components for the enterprise.


Stephan Hochdörfer

bitExpert AG

Stephan Hochdörfer currently holds the position of Head of Technology at bitExpert AG, a company specializing in software and mobile development. His primary focus is everything related to web development as well as automation techniques ranging from code generation to deployment automation.



Thorben Ziemek

BörseGo AG

Thorben has been developing single page web applications since it became cool in 2008. He worked on a large Ext JS application for a few years before moving on to BörseGo, where he is a JavaScript developer and creates frontend components for the web-based trading platform Guidants, as well as libraries and APIs used across the company’s product portfolio.


Thorsten Suckow-Homberg

eyeworkers GmbH

Thorsten Suckow-Homberg has been around the ExtJS community since 2007 and is part of the Sencha MVP program since 2018. He’s working for eyeworkers GmbH, Karlsruhe, as a Senior Software Developer and JavaScript/ExtJS trainer. In his spare time, he’s either chasing KOMs on Strava or provides updates and improvements to his software project at https://github.com/conjoon.

Manuel Künstler

eyeworkers GmbH

As a skilled web designer, Manuel gradually switched to the field of web development and now builds cutting-edge responsive websites at eyeworkers. He developed his first theme for an Ext JS 4 application and has since created many themes for different Ext JS versions.

Jan Mohr

eyeworkers GmbH

Jan is a software developer at eyeworkers, specializing in ExtJS development. He started with ExtJS 4 and Sencha Touch 2 and now has many years of experience in enterprise applications. Additionally, he provided training and consulting for companies in ExtJS development through his work at eyeworkers.

Grgur Grisogono

Modus Create

As a principal, Open Source at Modus Create, Grgur devotes his time to contributing to the web community at scale. His career as an agile JavaScript architect is filled with experiences from award-winning web applications. Grgur is also a book author, speaker, coach, organizer of several meetups worldwide, right-wing waterpolo player, passionate chocolate dissolver and a free-fall addict.

Jozef Sakalos

ExtJS, Sencha and Web Applications Senior Consultant

Jozef Sakalos is a consultant and trainer for ExtJS and web development. He is well-known for his outstanding support in the Sencha community and as a developer of various ExtJS extension.


Olga Petrova

Sencha Inc.

Olga Petrova is a software developer with more than 14 years of experience in developing enterprise and data science applications. She has worked with a broad range of web technologies, JavaScript libraries and frameworks, and she has a special interest in data visualization and developing enterprise web applications.

Torsten Dinkheller


Since 2004 I have been working as a freelancer in the IT sector.
In 2009 I was asked to develop a hybrid app for the Hamburg trade fair, which was later to be uploaded into the App Stores.
Looking for a framework I ended up at Sencha Touch. For the next 4 years I searched for comparable or better frameworks, but I ended up at Sencha again and again.
After that I worked with ExtJS in modern and classic.
For years I was very active in the Sencha Forum and in 2017 a Sencha employee approached me and so ended up working for Sencha, looking after Sencha customers.
My job included implementation, upgrades (from 3 plus), team lead as well as all other questions around Sencha frameworks.
In early 2018 Idera took other ways of customer care, so I am working as a freelancer again.

Marten Feldtmann

GESS Gesellschaft für Software in der Sozialforschung mbH and Dimap GmbH

Software developer for “GESS Gesellschaft für Software in der Sozialforschung mbH” and “Dimap GmbH” in Hamburg.

  • Smalltalker since 1986 using various language dialects like VisualSmalltalk, VisualWorks, VA Smalltalk
  • Several jobs in steel production, production automatization in real-time software development. Car park management software
  • Projects with relational databases, noSQl databases and OO-databases
    Since 1997 developer at Dimap for an election result presentation system for ARD and various other TV sender like SWR, NDR, WDR, BR, … system written in Smalltalk and later in C#
  • Since 2014 also developer for GESS in product development. Software components written in Java, C#, Python and ExtJS

Julia Will

Flewid AB

Julia is the Head of Development at Flewid AB in Stockholm, where she works with her team on various enterprise web applications.  With more than 14 years of experience in web development, she worked with a broad range of web technologies and frameworks.
During the past years she primarily worked with Single Page Applications and Phoenix/Elixir backend servers.

Max Rahder

Rahder Consulting, Inc.

Max Rahder is a veteran software engineer, full stack architect, project manager, and trainer. He started using Ext JS in version 2, and specializes in mentoring, training, testing, ExtJS version upgrades, as well as app development in other libraries, such as Ionic and React.

Karol Przystalski

Codete GmbH

Obtained a PhD degree in Computer Science in 2015 at the Jagiellonian University in Cracow. CTO and founder of Codete GmbH. Leading and mentoring teams of Codete. Working with Fortune500 companies on data science projects. Built a research lab that is working on machine learning methods and big data solutions in Codete. Give speeches and trainings in German and English in data science with a focus on applied machine learning.  Currently involved in trainings at O’Reilly.

Christoph Brandt

myview systems GmbH

Christoph has been involved in the development of product information management systems for over 15 years. During this time, he has gained experience in implementing data-intensive applications for customers from various industries. As co-founder of myview systems GmbH he is responsible for the development of a new API First Platform for the management and distribution of highly linked data.

Tanay Pant


Tanay Pant is an author, developer and tech enthusiast. He currently works at Crate.io as a Developer Advocate. He is best known for his books “Learning Web-based Virtual Reality”, “Building a Virtual Assistant for Raspberry Pi” and “Learning Firefox OS Application Development”. He has been acknowledged in the about:credits of Firefox for his contributions to the different open source projects of the Mozilla Foundation. He also writes for a number of websites like SitePoint and Tuts+ where he shares tips and tricks about web development.

Thomas SIMON


Thomas is a software engineer at Jnesis, Sencha’s official partner in France since 2013. He hasn’t stopped using ExtJS to learn best practices and to build large-scale enterprise application for the last 3 years, both in France and in our division in New-Zealand. He is also an official trainer and loves to share his knowledge of the framework with others.

Adrian Teodorescu

mzSolutions & Software SRL

Adrian is a Senior Software Developer that was part of the ExtJS core team. He is the one that initially developed the pivot package (acquired by Sencha) and while working for Sencha created the exporter package.

Aleksei Chernov

Veeam Software

Web developer with more than 15 years of experience currently running frontend platform team at Veeam Software. Spend most of my time helping other teams to develop web products in a more effective way by providing shared component libraries, testing tools and CI/CD pipelines. Passionate about automation and DevOps.

Stefan Stölzle


Stefan has been a software developer, teacher and consultant for almost 15 years.
On the Professional Services team at GitHub, his focus lies in helping companies with their digital transformation, both technical and cultural.

Marc Gusmano


Marc is a Sales Engineer and Product Architect with Sencha and has more than 30 years of experience in the software services industry. He has been extensively involved with custom HTML5 browser and mobile development projects, using his experience to build HTML5 Single Page Applications.

Marc has worked for several large software services companies, including Andersen Consulting and Hitachi Consulting, and he was co-owner of a software services and training company for more than 10 years.

Marc has a passion for building outstanding software, especially leading-edge, user-centric applications.

Atanas Popov

Sencha, an Idera, Inc. Company

Atanas Popov has more than 10 years of experience founding and leading technology companies, as well as spearheading and implementing effective growth strategies. He was appointed General Manager of Embarcadero Technologies in 2015, with overall responsibility of executing the company’s global business strategies. He is a passionate technologist with deep experience in product development, marketing and sales.

Tim Riedel

eyeworkers GmbH

As CEO and founder of eyeworkers, Tim has been working with ExtJS since the early days. With more than 20 years of experience in web development, he has focused on enterprise web applications. After visiting all major SenchaCon’s in the last years, he had the idea of an European Sencha ExtJS conference – this is how the Sencha Community Days were born.

Download all the slides now!

Get all the presentations of Sencha Community Days 2019. We prepared downloads for all the sessions and workshops.