Herr Kraatz macht Apps.
React Native
React Web

Services

Please find my services here.

React Native Apps / React Web Apps / Redux State Mgmt

React is fun! And Redux helps keeping the state (data) of your site consistent and complexity manageable. React Web Apps: For superfast first loading let's use SSR (Server Side Rendering). If you need an installable app instead (iOS & Android), think of React Native, the one-codebase solution which will be coded in JavaScript and JSX like React Web Apps are. We can also discuss a hybrid app approach: One-codebase solution Cordova (JavaScript / HTML / CSS / Angular with or w/o Ionic) which is around since 2008 with many plugins to use.

Collaboration Network

Without constant input from professional communication folks my app projects would have ended in a dead end pretty soon. And it is fun working with them! Please contact me and I'd be glad to get you in touch with 3 internationally operating agencies in Berlin and Munich area. And if you need smart and cost-saving development and test support from Remote-Siberia (really remote !) please also let me know. These guys are amazing in .NET, Java, Testing, and native Android:
Digital Mind Development Krasnoyarsk / Siberia

Responsive Design

Being responsive will raise your conversions as you help users find their way. Let's tailor your app for phone, phablet, tablet, and desktop using best fit CSS strategies.

CI / CD / Docker / Kubernetes

"It's not easy being green." - Kermit, the frog. compose-docker up works for development, but where to put it when done? And how? I'm just diving into kubernetes technology which is very promising.

Web Analytics

Content is king. But new sites and apps are in danger if your legacy sites/pages are still online, but neglected or out of date. Let's also take care of that.

Planning & Scrum

Scrum gets you deliverables every 1-4 weeks. So you can check fast if you're still on the right path. Also visible progress creates motivation for all. I can assist you as Scrum Master and Developer.

System Analysis

You have a big migration or integration project in front of you? Take your time in analyzing all connected systems and workflows. And come to an agreement about the requirements with all of your stakeholders. I can assist you.

Brainstorming Sessions

Please also invite me for concepting sessions, defining the MVP and target audience, or just to have a coffee or beer and get to know each other (this would be my party of course).

Industries

Take advantage of my experience in wholesale, retail, online-banking, business consultancy, telecommunications, and, of course, software and app production.

App Portfolio

Apps and ideas

Marry Harry

International Romance

Conny & friends

A cartoon messenger app - on hold

App ideas

What do you think?

SUPERBUDDY

Send charming picture messages.

iCal Sync

Web app to avoid overbookings - WIP

Lunchhopper

Find new lunch partners.

About

A summary of the last 16 years.

  • 2002-2005

    Software Developer

    ASP 3.0, T-SQL, SQL Server, HTML Developer
    (1 year)
    C#/.NET Remoting, PL-SQL Developer using Oracle 9i, UML
    (2 years)
    DMS Software Livelink (OpenText), Developer & Co-Admin
    (1 year)
    CRM Software SalesLogix (Sage), Developer & Admin
    (1 year)

  • 2006-2007

    System Analyst Data Warehouse

    Creating software design specifications for a new financial reporting and billing process after the merger of Sprint and Nextel.
    Proposals and presentations were worked out in cooperation with departments of Finance, Data Warehouse, Infrastructure and Production Support.
    (1 year)

  • 2008-2011

    Technical Lead Freelance Projects

    Implementing a Web Analytics Executive Dashboard for 20+ sites using Piwik, SQL-Server 2008, ASP.NET Frontend (C#, MVC)
    (6 months)
    Migration of client’s Alumni web portal to a new service provider
    (6 months)
    Magento eCommerce Plaform setup and client's product data import
    (3 months)
    Human Resources and Customer Relationship integration projects
    (6 months)

  • 2012-2013

    EBIT, ROI, Cash flow & Break (not even)

    Creating a Sales Exposé for a company in plastics industry.
    The price of the company was determined using a mix of gross rental method and multiplier method while analyzing the EBITs of the latest three years and trying to forecast the following 5 years.
    A share deal was preferred over an asset deal.
    (6 months)
    Taking a break for speeding down and new ideas.
    (1 year)

  • 2016

    ING-DiBa

    Frontend Development

    Due to a confidentiality agreement I cannot give details here.
    (6 months)

  • Since 2014

    Herr Kraatz macht Apps.


    Design and production of Marry Harry - International Romance, available on iOS and Android.

    Design and production of Lunchhopper - Find new lunch partners, available on iOS and Android.

    Design and production of SUPERBUDDY - Send charming picture messages, available on iOS and Android.

    Development of Conny & friends - A cartoon messenger for children, will be available on iOS and Android. Actually on hold.

    Development of iCal Sync - Web app to avoid overbookings, will be available in all major browsers (desktop & mobile). Work in progress.

  • Back
    to
    work


 

Holger Kraatz

 

In 2000 I first got in touch with IT business - during my internship in a consulting company in Virginia - and immediately became passionate about programming. That's why I started in this industry after finishing my studies in Industrial Engineering and Management. And never regretted this focus on technology.

Contact

 

Herr Kraatz macht Apps.

c/o betahaus GmbH
Prinzessinnenstr. 19-20
10969 Berlin

+49 (0)151 2015 2224
service (bei) herrkraatz (punkt) berlin