Most Active Speaker

Maia Grotepass

Maia Grotepass

Staff Android Engineer at Qonto

Berlin, Germany


Mobile dev since Cupcake. Android GDE. Kotlin enthusiast. Dogs make me happy.


  • Most Active Speaker 2023
  • Most Active Speaker 2022

Area of Expertise

  • Information & Communications Technology


  • Android Development
  • Android
  • Android software Development
  • Kotlin
  • Kotlin Multiplatform

Ok Gemini, what's for dinner? - Using multi-modal AI to avoid eating takeaways

It’s dinner time and you are craving takeaway but you are determined to be healthy and cook at home. You only have a bunch of leeks in the fridge. Wait, there’s an app for that! OK Gemini, What’s for dinner?

This talk will document our journey in building a Kotlin multiplatform proof of concept app that helps you cook at home. You provide a photo of your dream dish and a list of ingredients you have. The app will will use multimodal Gemini AI to produce a recipe and a shopping list. We will explore what it takes to build the app and give some impressions of the experience. We will take the app for a spin and see what recipes it produces.

At the end of this talk the audience will get the following “takeaways”

- An idea what it takes to use Gemini AI with text and image in a multiplatform app
- A demo of the proof of concept app
- Explanations and gotchas we collected on the way
- An open source repo with the source

This talk is brand new and has not been accepted anywhere. It is suitable for intermediate Android with little to no AI experience. This will be a co-presentation of two speakers. It is a 40min talk.

A walk in the Lindenmayer fractal forests with a Kotlin notebook

Some pieces of Kotlin code are better discovered through exploration. Code for a Lindenmayer system (Lsystem) is an example of this. These systems can generate beautiful organic looking fractal structures. A few small tweaks cause unexpected variety: perfect for experimentation. Kotlin Notebooks are especially suited for experimental and exploratory coding.

This talk will showcase the use of Kotlin Notebooks to draw a series of Lsystem trees. It will be a live code session in IntelliJ with a shareable Kotlin Notebook as a result.

You do not need to be a data scientist to enjoy this talk.

The audience will:

- See Kotlin Notebooks in action with the focus on reusable canvas drawing
- See an iterative coding workflow that explores code and visuals
- Learn about Lindenmayer systems
- Receive a link to the talk Notebook which they can copy and modify to continue the experiments in their own time

This talk has not been presented anywhere. It is suitable for any audience that is curious about Kotlin code and Kotlin Notebooks and is looking for an entertaining interactive coding experience. You do not need to be a data scientist to enjoy this talk. 40min

Doodle sketching in Compose mobile and desktop

Do you remember the freedom of doodling without knowing what the outcome would be? What if this were possible in a coding framework such as Compose? This talk explores experimenting with still visuals and animations using Jetpack compose for Android and Desktop.

We will look at:

- How the animation loop works
- Basic drawing features available in Jetpack
- Compose and differences between mobile and desktop
- Useful add on libraries for creative coding with Jetpack Compose
- Some inspirations to kickstart our doodles
- Live code demo

duration: 40 min
target audience: Beginner to intermediate Compose and creative coding enthusiasts
This talk was presented online as a workshop for IWD Nairobi 2023

90s Website … in 2023 on mobile in Compose … for science

Why would anyone build something with a 90s website aesthetic - in Compose? Nostalgia? For one the 90s website aesthetic made heavy use of animations and visual effects. So emulating this style will take any animation framework through its paces. This talk will take some of the most iconic 90s website elements and demonstrate how to reproduce them to build a retro mobile experience using Jetpack Compose.

I can’t promise the end result will have a good user experience but I can promise a good look at the animation system in Compose and a collection of cheesy code snippets.

duration: 40 min
target audience: Beginner to intermediate Compose enthusiasts
This talk was presented at Android Makers 2023, droidcon NY and droidcon London

Imperative, declarative, object oriented, functional: four of a Kotlin kind

Humans have small working memory but good pattern matching skills. The problems we want to solve are large and complex. How can the approach we take make it easier to deal with complexity, especially if the approach is supported by the language we choose.

This talk is a comparative view of four interrelated programming paradigms: imperative, declarative, object oriented and functional - from a Kotlin perspective.

This talk will cover in depth details of the language features that are especially suitable for each of the paradigms. It will highlight how each language feature helps to deal with complexity.

This talk may also contain:
* brief definitions
* snippets of software history

A simplified version of this talk was presented at the I code Java conference in person in South Africa. It is suitable for intermediate Kotlin audiences. This talk was presented at appdevcon 2023

She started talking about DI and you wont believe what happened next - 7 tips for better tech talks

A click bait title won't keep your audience awake. In this talk I look at my experiences as technical speaker and extract the most important tips and strategies to keep an audience engaged no matter how boring the topic.

20 min This presentation is suitable for all levels. This talk was chosen as the keynote for DevFest South Africa 2022

droidcon Berlin 2024 Sessionize Event

July 2024 Berlin, Germany

KotlinConf 2024 Sessionize Event

May 2024 Copenhagen, Denmark

Android Worldwide January 2024 Sessionize Event

January 2024

droidcon Kenya 2023 Sessionize Event

November 2023 Nairobi, Kenya

DevFest Nairobi 2023 Sessionize Event

November 2023

droidcon London 2023 Sessionize Event

October 2023 London, United Kingdom

droidcon NYC 2023 Sessionize Event

September 2023 New York City, New York, United States

Google IO Extended 2023 (Cape Town) User group Sessionize Event

August 2023 Cape Town, South Africa

Appdevcon / Endpointcon 2023 Sessionize Event

May 2023 Amsterdam, The Netherlands

AndroidMakers by droidcon 2023 Sessionize Event

April 2023 Montrouge, France

International Women's Day Nairobi 2023 Sessionize Event

March 2023

DevFest South Africa 2022 (Cape Town) Sessionize Event

November 2022 Cape Town, South Africa

droidcon Berlin 2022 Sessionize Event

July 2022 Berlin, Germany

droidcon San Francisco 2022 Sessionize Event

June 2022 San Francisco, California, United States

DevConf 2022 Sessionize Event

April 2022

GDG DevFest UK & Ireland Sessionize Event

January 2022 London, United Kingdom

droidcon EMEA 2020 Sessionize Event

October 2020 Nusa Dua, Indonesia

DevFest South Africa 2019 Sessionize Event

November 2019 Cape Town, South Africa

Kotlin Everywhere South Africa 2019 Sessionize Event

September 2019 Johannesburg, South Africa

Maia Grotepass

Staff Android Engineer at Qonto

Berlin, Germany


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