Hi, I'm Leo

Mobile developer

Experienced in developing Android and KMP apps.

Contact me
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About Me

My introduction

I'm a freelance mobile developer, focused on creating Android and KMP apps.

4+ Years of
experience
6+ Completed
projects
3+ Companies
worked for
Download CV

Skills

My technical level

Android developer

More than 5 years

Kotlin

80%

Jetpack Compose

80%

Room

70%

Gradle

70%

KMP developer

More than 1 year

Compose Multiplatform

80%

Koin

80%

Ktor

70%

SQLDelight

70%

Backend developer

More than 3 years

Firebase

80%

AWS & GCP

70%

PostgreSQL

70%

Node.js

70%

Qualification

My personal journey
Education
Work

M.Sc. Media Informatics

University of Applied Sciences - Düsseldorf
2025 - now

B.Sc. Media Informatics

University of Applied Sciences - Düsseldorf
2019 - 2025

IT Specialist

Technical College - Moers
2015 - 2018

Android & KMP Developer

Freelance
2023 - now

Android Developer

NanoGiants GmbH - Düsseldorf
2022 - 2023

Android Developer

University of Applied Sciences - Düsseldorf
2020 - 2022

IT-Specialist

Fujifilm Recording Media GmbH - Kleve
2015 - 2018

Services

What I offer

Android
Development

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Android Development

  • Native App Development

  • Basic UI/UX Development

  • Connect external APIs

  • Write Unit and Integration Tests

KMP
Development

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KMP Development

  • Cross Platform App Development

  • Basic UI/UX Development

  • Connect external APIs

  • Write Unit and Integration Tests

Backend
Development

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Backend Development

  • BaaS Configuration

  • CI/CD Automation

  • Performance Monitoring

  • Custom Backend Solutions

Portfolio

Most recent work

Social Lottery App

As a freelancer I worked on the Android App of the German Social Lottery "Aktion Mensch", in particular on a new login feature.

Demo

IoT Sensor Data Visualization

In the course of a research project, I developed an Android App that fetches sensor data from TheThingsNetwork and displays it in various graphs.

Coming soon...

More projects will be available shortly.

You have a project in mind?

Contact me now for a free first call.

Contact me

Testimonial

What my clients say about me

NanoGiants GmbH

About my work as an Android developer

Mr. Nobis has an extremely comprehensive and very well-founded specialist knowledge, which he was able to put into practice excellently at all times.

Fujifilm Recording Media

About my work as an IT-specialist

Thanks to his good and quick comprehension skills, Mr. Nobis quickly acquired a comprehensive overview of the operational processes in the various divisions.

NanoGiants GmbH

About my work as an Android developer

Due to his particularly strong conceptual, creative and logical thinking, Mr. Nobis always found excellent solutions for all problems that arose.

Contact me

Get in touch

Call Me

+49 176 45914738

Email

contact@leonobis.com

Location

Düsseldorf, Germany
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