Profile

• I love creating great products and I love to code. I?m currently focussed on React Native with TypeScript and iOS with Swift but I have a general interest and understanding of coding, design and UX combined with an entrepreneurial attitude. My 18 years of work experience and my strong programming skills are the foundation for my creative abilities. 
• I like to work as a programming expert in a team and contributing my knowledge but I also like to work as a generalist. When I work for my own apps I?m also covering the fields of strategy, concept, design, programming and marketing.

Experience

01/2020 - 03/2020: Parental Leave

09/2019 - 12/2019

Customer: Greenhouse Innovation Lab, Gruner+ Jahr

Tasks:

• Working on Balloon (meditation) and Hirschhausen Diät (interval fasting), both react native based apps for iOS and Android platforms.

05/2019 - 08/2019: Parental Leave

11/2018 - 04/2019:

Customer: Greenhouse Innovation Lab, Gruner+ Jahr

Tasks:

• Working on Balloon (meditation) and Hirschhausen Diät (interval fasting), both react native based apps for iOS and Android platforms.

06/2018 - 10/2018

Tasks:

• Splittr Android App
• Developing a react native based app for the Android platform.

04/2018 - 05/2018

Tasks:

• CryptoCars Dapp
• Developing a react based decentralized app (ERC-721 Token Sale) for the Ethereum platform.

08/2017 - 06/2018

Customer: Star Finanz GmbH

Tasks:

• S-Apps, yomo
• Swift development for the number 1 finance app (Apple AppStore) in Germany (S-App) and their upcoming star yomo.

03/2017 - 06/2017

Customer: Acando GmbH, Olympus

Tasks:

• Developing a native swift iPad app for a B2B Olympus project.

09/2016 - 07/2017

Tasks:

• Splittr iOS Relaunch
• Transforming Splittr from a paid to a freemium app with new design, new functionality and a new technology (Google Firebase).

09/2015 - 06/2016

Customer: eSailors IT Solutions Ltd., Tipp24

Tasks:

• Developing a native swift app for Tipp24 with thousands of active customers.

02/2015 - 05/2015

Tasks:

• 3 months living and working in San Francisco for inspiration in the tech hotspot of the world.
  I visited companies like Google, Airbnb and worked in a coworking space in San Francisco.

12/2014 - 08/2015

Customer: gladly on request

Tasks:

• A complete relaunch of my most successful app and my first Swift project.

05/2014 - 12/2014

Tasks:

• Jawed Karim (founder of YouTube) and Found Fair Ventures asked me to co found a company focussed on video apps. We pivoted several times but were not succesful.

11/2013 - 05/2014

Customer: WunderCar Mobility Solutions GmbH

Tasks:

• As the first engineer we released the first version of the WunderCar app in the iOS AppStore after only 3 months of work. The company has raised $70M total funding since 2014.

WORK EXPERIENCE

01/2006 ? today:

Role: Fullstack Developer

Customer: on request

Tasks:

05/2010 - today

• Developing native iOS/Android, web and backend apps for clients like EnBW (Good School), Greenhouse Innovation Lab (Gruner+Jahr), Starfinanz (S-Apps, yomo), OMR, eSailors (Tipp24), Acando (Olympus), Lindbergh Labs, WunderCar, 3M, Gigalocal, Mercedes-Benz (Jung von Matt), as well as personal projects Splittr, IntelliDrink, EggMaster, and iKicker.

01/2006 - 02/2011

• Developed ActionScript applications for clients including Audi, Coca-Cola, McDonald?s, Nike, Volkswagen, Deutsche Telekom, Nivea, Sony, Olympus, and agencies such as Scholz & Volkmer, Tribal DDB, Kolle Rebbe, Plan.NET, Rapp Collins, Publicis.

03/2009 ? 12/2012

Role: Instructor

Customer: SAE Institute, Hamburg

Tasks:

• Tought courses about ActionScript programming and game development.

02/2004 ? 04/2004

Role: Frontend Developer (Freelance)

Customer: Fusefarm Interactive Ltd., Sydney

Tasks:

• Freelance ActionScript development.

08/1999 ? 12/2005

Role: Frontend Developer

Customer: Springer & Jacoby Digital GmbH, Hamburg

Tasks:

02/2002 - 12/2005

• Lead developer responsible for Flash production, leading freelance developers, and developing ActionScript applications for clients such as Coca-Cola, Mercedes-Benz, McKinsey & Company, Smart, TUI, Maurice Lacroix, Olympus.

08/1999 - 02/2002

• Completed Apprenticeship

SKILLS

• React Native
• Redux
• Typescript / JavaScript
• Swift
• iOS SDKs
• Firebase

Worked with

• REST APIs
• Graph QL
• CI / CD
• Unit / UI testing
• Jenkins
• Git
• NoSQL
• SQL
• Processing
• C
• Arduino
• OpenGL

Played with

• Decentralized Apps (blockchain)
• Machine Learning (scikit, TensorFlow)

App Frameworks

• React Native
• React.js
• Redux.js
• Next.js

Platforms & Tools

• Firebase
• GCP
• Azure
• GraphQL
• REST APIs

AI & Data Science

• Generative AI (Gen AI)
• Retrieval-Augmented Generation (RAG)
• Prompt Engineering

Architecture

• MVC
• MVP
• MVVM
• Functional Programming
• OOP

Dev. Practices

• Clean Code
• CI/CD
• Unit/UI Testing
• GitFlow
• GitHub Actions
• Code Reviews
• Pair Programming

UX / UI Design

• Proficient in UX and interface design, with a strong grasp of design principles and usability

IoT

• Arduino
• Raspberry Pi
• Smart Home
• Home Assistant

Design Tools

• Figma
• Sketch
• Miro
• Canva
• Adobe CS (Photoshop, Illustrator, After Effects, Premiere)

Agile Methodologies

• Scrum
• Kanban
• Agile workflows

Teamwork

• Strong team player with the ability to adapt to and enhance team processes

Analytical Problem Solving

• Skilled in understanding complex technical and business requirements and translating them into effective solutions

Self-Management

• Highly self-motivated, capable of independently managing tasks and achieving goals with minimal supervision