Profileimage by Christopher Kaiser IT-Berater, System Architect, Product Owner, Head of Development, Lead Developer, Interims-CTO / CIO from Koeln

Christopher Kaiser

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Last update: 03.07.2023

IT-Berater, System Architect, Product Owner, Head of Development, Lead Developer, Interims-CTO / CIO

Company: kleerly GmbH
Graduation: Bachelor of Science, Informatik
Hourly-/Daily rates: show
Languages: German (Native or Bilingual) | English (Full Professional)

Attachments

Kaiser-Chris-CV-Freelance_150623.pdf

Skills

Berufserfahrung
Interims CIO, Head of Development, Head of E-Commerce IT Strategies & Integration, Product Owner, System Architect, Lead Developer (Java, C# und Typescript / React)

Stärken
Authentisch - Breit aufgestellt - Kundenorientiert - Hohe Kundenzufriedenheit - Cross-Funktional - Leadership
IT Strategie - Web Technologien - Integration - IT-Recruiting
System Architektur - Web-App Architektur - Cloud Architektur - DevOps
Teamplayer - Kommunikation - schnelle Auffassungsgabe - schnell Sprechen ;)

Technologien
E-Commerce - CMS - Cloud
System Architecture - Integration - API Design - Microservices 
Spring Boot - Entity Framework - React - NodeJS - NextJS
Java - C# - .Net - Javascript - Typescript
Linux / Bash - Docker - DevOps - MS Azure - Azure Cloud - AWS - Kubernetes - Openshift

Tools
Bamboo - Jenkins - Git - Bitbucket - GitHub - GitLab
Jira - Confluence 
K6 - Uptrends - GTMetrics - JMeter - Cypress
Magnolia CMS - Commerce Tools - Contentful - Prismic

Methoden
Software Quality - Code Reviews - Architecture Reviews - Pair Programming - Anforderungserfassung - Anforderungsmanagement
Last Tests - Performance Tests - End-To-End Tests - Unit Tests - Logging - Monitoring
Continuous Integration - Continuous Deployment
SCRUM - Kanban - Agil - Coaching

Sonstiges
Motivator - Leader - Lehrer - Zielorientiert - Lösungsorientier - Pragmatisch - Flexibel

Sprachen
Deutsch (Muttersprache) - Englisch (sehr gut)

Project history

08/2021 - 08/2022
Interim CIO E-Commerce Mittelstand (80 Mio. € Umsatz)
(Consumer goods and retail, 50-250 employees)

- Teamleitung von drei Teams (Frontend, Backend, Systemadministration)
- Restrutkurierung der Entwicklungsprozesse
- Restrukturierung der Software Architektur
- Relaucn von neuen Online Shops
- Integration M&As
- Strategische Planung und Aufstellung der IT-Landschaft
- Einführung BI

01/2021 - 03/2021
Head of Development
nexum AG (Internet and Information Technology, 50-250 employees)


03/2019 - 02/2021
IT Consultant / Product Owner - ex libris
Ex Libris AG (Consumer goods and retail, 50-250 employees)

ex libris Online Shop
https:/www.exlibris.ch/de/

Role: Product Owner / Project Manager, IT Consultant & System Architect
Project: Relaunching one of swiss biggest online shops (Revenue: 100. Mio. CHF per year) with the main focus on a future proof, easy to maintain and scaleable tech stack and architeture. Challenges: Very process orientated customer, very high quality requirements. All this while dealing with a >10 year old legacy Backend API.
Technology: React, Typescript, Openshift, KrakenD (API Gateway), LoadImpact / JMeter, Bamboo, Confluence, Jira, Docker


01/2020 - 12/2020
Head of E-Commerce IT Strategies & Integration
nexum AG (Internet and Information Technology, 50-250 employees)


07/2020 - 11/2020
IT Consultant / Architect / Architecture Review - Whitewall Media
Whitewall Media Online Shop

Whitewall Media Online Shop
https://www.whitewall.com/
 

Role: IT Consultant / Architect
Project: Architectural review of the current system and designing new architecture solution. Integrating in-house APIs with contentful and a custom webapp based on Angular JS and running with AWS Lambda and AWS Cloudfront. After the review some of my team members started rewriting and reorganizing the web app with a rolling integration in the old system for smooth transition of the legacy code to the new webapp
Technology: Contentful, Angular, Typescript, AWS Lambda, AWS Cloudfront, ServerLess, Imgix


05/2019 - 07/2019
IT Consultant & System Architect - Tele2
Tele2 Online Shop

Tele2 Online Shop
https://www.tele2.de/
 

Role: IT-Consultant & System Architect
Project: Integration of store functionality into an existing system while building the foundation of a complete relaunch in a modern CMS stack for a telecommunication . Challenges: Smooth Rollout of the new tech stack while combining legacy ’look and feel’ with modern web technologies to pass the ’grandma-test’ regarding the clients target customer group.
Technology: Magnolia CMS in combination with different external services


01/2018 - 06/2019
IT-Consultant, System Architect & Technical Lead - OBI Content Portal
OBI Content Portal (Consumer goods and retail, >10.000 employees)

OBI Content Portal
https://www.obi.de/magazin

Role: IT-Consultant, System Architect & Technical Lead
Project: Creating a SEO optimized DIY content magazin with large image usage and some custom magnolia editing tools (i.e. DAM with focal point management and custom preview for the headless approach) - Challenges: Going two new ways: Combining React with Magnolia CMS in a custom headless approach and combining Magnolia CMS with Microservices for product and store managemen
Technology: Java Spring Boot, Magnolia CMS, React, Javascript, PACT Contract Testing, Docker, Bamboo, Confluence, Kubernetes, Imgix

05/2017 - 01/2019
IT Consultant, Technical Lead & Backend Developer - ZEG
ZEG - Multitennant Online Shop Solution

ZEG - Multitennant Online Shop Solution
https://www.bulls.de & https://www.pegasus-bikes.de/ & etc.
 

Role: IT Consultant, Technical Lead & Backend Developer
Project: Legacy Magnolia CMS project with a three stage multitennant system (business card, shopping window, online shop, 130 tennants) as well as two brand sites. Challenges: Introducing the shop functionality to the tennant sites, dealing with a historically grown architecture
Technology: Java, Magnolia CMS, Commerce Tools, Javascript, JQuery


09/2018 - 10/2018
IT-Consultant & System Architect - Fresenius Medical Care
Fresenius Medical Care (Pharmaceuticals and medical technology, >10.000 employees)

Fresenius Career Portal
https://karriere.fresenius.de/
 

Role: IT-Consultant & System Architect
Project: Relaunching the award winning carreer portal of the fresenius group to a scalable multimandant system while preserving the existing functionality. Also preparing the system to a change from taloom ATS to workday. Challenges: Bringing a modern (private) cloud infrastructure into a conservative company. Also dealing with feature toggleable setups for different branches (> 40) of the fresenius group.
Technology: React, Typescript, DockerSwarm, GitLab CI, Drupal, Symphonie, Taloom, Workday, Bamboo, Confluence, Jira, Docker


03/2016 - 04/2017
Project Manager & IT Consultant - Bison IT
Bison IT (Internet and Information Technology, 50-250 employees)

Bison IT - Custom Self Service Portal / Online Shop

Role: Project Manager & IT Consultant
Project: License management for floating microsoft licenses with customer self service portal (B2B)
Technology: .Net / C#, CSS, Javascript, jQuery, MSSQL


02/2016 - 04/2017
IT-Consultant & Lead- and Backend Developer - Häuser KG
Häuser KG (Media and Publishers, 50-250 employees)

Häuser KG - Online Shop
https:/www.druckdiscount24.de/

Role: IT-Consultant & Lead- and Backend Developer
Project: Developing and maintaining a B2B and B2C e-commerce portal in hte print market. Multitennant system for different B2B customers including skinned and "API-only" webshops. Interfaces to end-users as well as directly to the production line - Challenges: 10 year old legacy system with no architecture; Complete Migration to MS Azure Cloud including Database as well as mutliple services running on 12 different VMs
Technology: .Net / C#, ASP, MVC, CSS, Javascript, jQuery, Knockout JS, Entity Framework, MSSQL, MS Azure Cloud

 


12/2014 - 02/2016
Backend Developer
Daimler AG (Automotive and vehicle construction, >10.000 employees)

Daimler AG - PAI

Role: Backend Developer
Project: Platform for JEE Daimler software projects unify base product usage for operations. Also software development projects must usecomponents of the framework to access directory data and perform authen-tication and authorisation (more than 500 applications use this platform).
Technology: Java J2E, Tomcat, IBM Websphere


03/2014 - 06/2014
Fullstack Developer
Daimler AG (Automotive and vehicle construction, >10.000 employees)

Daimler AG - Internal Online Shop

Role: Fullstack Developer
Project: Development of a JSF component library for a Daimler procurement department.
Technology: Java J2E, JSF 2.0, CSS, Javascript, JQuery IBM Websphere

Local Availability

Only available in Köln and 50 km around
Für einzelne Kunden-, Kennenlern- und Abstimmungstermine grundsätzlich reisebereit (auch mehrere Tage), sonst vort Ort nur im Umkreis Köln / Bonn bzw. Remote
Profileimage by Christopher Kaiser IT-Berater, System Architect, Product Owner, Head of Development, Lead Developer, Interims-CTO / CIO from Koeln IT-Berater, System Architect, Product Owner, Head of Development, Lead Developer, Interims-CTO / CIO
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