Ronny Karallus

Technical E-Commerce Consultant

Experience, competence, reliability, motivation, ...

... are values successful software projects are based on. Having worked for more than a decade as a consultant, I count those properties among my strengths. They are arguments why I am a good match for your team or why I can lead your project to success. You can find even more scrolling down on this page.

Experience

Technical E-Commerce Consultant

Freelancer

December 2017 - Today

Senior Software Engineer

International Marketplace Startup

February 2017 - November 2017

Principal Software Engineer

MisterSpex GmbH

August 2016 - January 2017

Freelancing Software Developer

Freelancer

January 2013 - July 2016

Senior Consultant

Intershop Communications AG

August 2004 - December 2012

Education

University of Bamberg, Germany

Master of Science
Information Systems

Grade: very good with distinction

2009 - 2017

Univeristy of applied sciences Mittweida, Germany

Diplom-Informatiker (FH)
Applied Computer Science

Grade: good

2000 - 2005

Skills

E-Commerce technologies
  • Intershop Enfinity Suite 6 (6.0 - 6.7)
  • Intershop 7 (7.0 - 7.9)
Search
  • Apache Solr
  • Apache Lucene
Programming Languages
  • Java
  • JavaScript
  • Perl
  • PHP
  • Shell Scripting
Java Technologies
  • JavaEE
  • JSP
  • ISML
  • Spring
  • Apache Tomcat
Web Technologies
  • HTML 5
  • CSS 3
  • JavaScript
  • Apache Webserver
  • Nginx
JavaScript Technologies
  • JQuery
  • Angular
  • Knockout.js
  • Ionic
Database Technologies
  • Oracle DB
  • PostgreSQL
  • SQL
  • Neo4j
  • Cypher
  • IBM Cloudant
Testing
  • JUnit
  • Selenium
  • CasperJS
  • Geb + Spock
  • Apache JMeter
Virtualization
  • VMWare Workstation
  • Oracle Virtualbox
  • Docker
  • Vagrant
  • Packer
  • Kubernetes
Domain Knowledge
  • E-Commerce
  • Search
  • Big Data
  • Software Architecture
  • Application Integration (SOA)
Version Control
  • SVN
  • GIT
  • Rational Synergy
Build
  • Gradle
  • Maven
  • Ant
  • Webpack
Software Development Process
  • OOAD
  • SCRUM
  • Kanban
  • UML
  • Atlassian JIRA
  • Atlassian Confluence
IDE
  • Netbeans
  • Eclipse
  • Intershop Studio
  • IntelliJ IDEA
  • IntelliJ Webstorm
Cloud Technologies
  • AWS (S3, Route53)
  • Azure (Blob Storage)
  • IBM Cloud (Watson Services, Cloudant, Kubernetes)
Continuous integration
  • Hudson / Jenkins
  • Atlassian Bamboo

Portfolio

Software development and successful software projects are my passion. I enjoy to expand my horizon in new projects and with new challenges. My manifold experiences are a great help and at the same time an enrichment for a lot of projects. Find my portfolio below and get an idea how your project can benefit from my participation. If you are interested in my technical expertise, please refer to the navigation item skills.

Software development

After more than a decade in different software projects I can draw upon comprehensive experiences. I am counting technically mature architectures, re-usable and extendable software as well as good maintainability among the main principles in a successfully software project. Besides the source code itself especially tests and documentation are the important deliverables. To get an idea how I can support your project technically, please have a look onto the page skills, which contains an overview on my technical skills.

Architecture / Technical Lead

Based on my long term experience as consultant I have a broad knowledge on technologies, processed and projects. This helps to lead developers and developer teams into the right direction and make the right decisions in project situations. Reviews for specifications, processes or source code are as much a part of this role as the technical coordination of the project teams. Working in global teams with distributed and foreign language developers is also not a problem based on my longtime international project experience.

Training / Coaching

Is your project team lacking some experience in one of the areas I am specialized in and an important implementation project is getting close? I can support you with trainings for dedicated topics. In cases where the topics that require assistance are not known in advance an interesting approach is training and coaching from within the team. I am happy to work together with your team in the daily implementation phase and support with particularly tailored trainings in areas where demand is identified. Also interesting are 1on1 session in the tradition of pair-programming. Experience shows that lasting results can be achieved this way.

Build Engineering / DevOps

A consistent process for source code compilation is as essential for a project as a process for automated and reliable deployment. The responsibilities of a build engineer are on management of the VCS, the build server and the build scripts themselves. In projects where virtual machines are used for development the build engineer may also be responsible for their creation and maintenance. Often also performing or supporting the deployment on test and production environments is within the realm of this role. I can provide support in this area because of my good understanding of processes, tools and system infrastructure. Especially in the ramp-up phase of a project the usage of external resources can be useful to implement a reliable infrastructure including good documentation.

Quality assurance

One of the most important tasks in a software project is a comprehensive and reliable quality assurance. Besides manual functional tests also automatic functional tests, performance tests an analysis are counted among the tasks in this area. I can be a profit for your project in the mentioned areas. Performance test, analysis and optimization in combination with automatic system tests are my special strengths. An additional focus of a successful project should also be on a good problem management. The tasks include communication with the QA team, the pre-processing of QA tickets and the assignment of the tasks to the correct developer as well as qualified escalations of problems to vendors. Those factors can have a direct impact on a fast and successful QA phase. I am looking forward to make your project benefit from my experience in this area.

Site Notice

This website is provided by
Ronny Karallus
Wilhelmsaue 30
10713 Berlin
Germany
(+49) 176 80109281
ronny@karallus.info
Tax-ID: DE287071236
Legal Notice

Liability for Contents

As service providers, we are liable for own contents of these websites according to Sec. 7, paragraph 1 German Telemedia Act (TMG). However, according to Sec. 8 to 10 German Telemedia Act (TMG), service providers are not obligated to permanently monitor submitted or stored information or to search for evidences that indicate illegal activities.

Legal obligations to removing information or to blocking the use of information remain unchallenged. In this case, liability is only possible at the time of knowledge about a specific violation of law. Illegal contents will be removed immediately at the time we get knowledge of them.

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Our offer includes links to external third party websites. We have no influence on the contents of those websites, therefore we cannot guarantee for those contents. Providers or administrators of linked websites are always responsible for their own contents.

The linked websites had been checked for possible violations of law at the time of the establishment of the link. Illegal contents were not detected at the time of the linking. A permanent monitoring of the contents of linked websites cannot be imposed without reasonable indications that there has been a violation of law. Illegal links will be removed immediately at the time we get knowledge of them.

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Privacy Policy

An overview of data protection
General

The following gives a simple overview of what happens to your personal information when you visit our website. Personal information is any data with which you could be personally identified. Detailed information on the subject of data protection can be found in our privacy policy found below.

General information and mandatory information
Data protection

The operators of this website take the protection of your personal data very seriously. We treat your personal data as confidential and in accordance with the statutory data protection regulations and this privacy policy.

If you use this website, various pieces of personal data will be collected. Personal information is any data with which you could be personally identified. This privacy policy explains what information we collect and what we use it for. It also explains how and for what purpose this happens.

Please note that data transmitted via the internet (e.g. via email communication) may be subject to security breaches. Complete protection of your data from third-party access is not possible.

Data collection on our website
Server log files

The website provider automatically collects and stores information that your browser automatically transmits to us in "server log files". These are:

  • Browser type and browser version
  • Operating system used
  • Referrer URL
  • Host name of the accessing computer
  • Time of the server request
  • IP address
These data will not be combined with data from other sources.

The basis for data processing is Art. 6 (1) (f) DSGVO, which allows the processing of data to fulfill a contract or for measures preliminary to a contract.

This website is provided by
Ronny Karallus
Wilhelmsaue 30
10713 Berlin
Germany
(+49) 176 80109281
ronny@karallus.info
Tax-ID: DE287071236