Full Stack Entwickler / DevOps

11/2019 – 3/2020

Entwicklung einer Suite von reporting Tools für QA der Cloud Platform Delivery.
Migration einer existierenden legacy sammlung von JavaScript Applikationen zu einer einheitlichen Applikation.
Anbindung verschiedener API als Datenquelle (Jira, Github).
Pflege der existierenden J2EE Backend Lösung durch Erweiterung zu einer REST API.

Apache Tomcat, EJB (Enterprise JavaBeans), Java (allg.), JavaScript, Vue.js

12/2018 – 12/2023

Konzeptualisierung und Umsetzung einer Plattform zur Trainingsplanung und Steuerung für Ausdauersport.

Cloud Computing, Amazon Web Services (AWS), Docker, Git, Go (GoLang), Google Cloud, Kotlin, MongoDB, Vue.js

8/2018 – 11/2019

Implementierung einer Platform zur Integration von heterogenen Datenquellen aus Industrial IoT Devices.
Migration einer Lagecy Anwendung zu einer Microservice basierten Applikation zum Betrieb auf kleinen Edge Geräten.

Docker, Go (GoLang), Java (allg.), Kotlin, MongoDB, PostgreSQL

1/2018 – 8/2018

Entwicklung neuer features für eine Video Streaming App. Aufbau einer CI/CD Pipeline in der Cloud.
Migration der Codebase von Java nach Kotlin.

Kontinuierliche Integration (CI), Android Entwicklung, Java (allg.), Kotlin

2/2017 – 12/2017

Entwicklung und Betrieb von Microservices für Lager Logistik im Lebensmittel Einzelhandel.
Betrieb auf Kubernetes in Google Cloud unter Verwendung von Kafka als Message Broker.

Kafka, Docker, Java (allg.), Jenkins, Kubernetes

1/2017 – 12/2020

Unterstützung bei der Entwicklung von Frontend Projekten bei externen Kunden aus der Energie und Versicherungsbranche.
Entwicklung von Portfolio / Landingpages und Coaching von Entwicklern hinsichtlich der Verwendung von WebComponents.

CSS (Cascading Style Sheet), HTML5

1/2017 – 3/2017

Durchführung von performance audits einer komplexen Web App basierend auf WebComponents mit Polymer. Unterstützung der Entwickler beim Beheben der Performance Probleme & Coaching zum Umgang mit Polymer / WebComponents.

HTML, JavaScript

10/2015 – 12/2016

Responsible for the transforming business processes and digitalisation of supply chain / booking. Introducing agile methodology int day-to-day working.
Tech Lead for introduction & customisation of Salesforce as well as integration in the backoffice systems.
Responsible for company websites as well as the web apps for all backoffice processes wrt to order fulfillment.

Salesforce, Agile Entwicklung, JavaScript, PHP

5/2015 – 10/2015

Developing a new video player library based on ExoPlayer. Integration of DRM
for download and offline-playback of video assets with DASH/ Widevine
Perf-Audit & Improvement of the application

Android Entwicklung, Git, Java (allg.), Jenkins

2/2015 – 5/2015

Planning & prototyping a smart companion app for personal development.

Developing a REST API on google app engine / integration into APNS.

iOS Entwicklung, Swift (Apple), Google Cloud, Go (GoLang)

11/2014 – 2/2015

Stability improvements and refactoring of a complicated codebase. Introducing design patterns (MVP) and stabilising the agile process in the team.
Improving stability of the integration of the Chromecast companion library, as well as the integration of an external video player/DRM library.

Android Entwicklung, Java (allg.)

11/2014 – 12/2014

Portation of a hybrid HTML5 app for windows mobile

.Net Framework (Microsoft), C#, HTML5, JavaScript, Windows Phone

2/2014 – 3/2014

Development of an Augmented Reality app for iOS for an external customer (miha Bodytec)

iOS Entwicklung, Objective-C

11/2011 – 12/2018

Architecture, development and operation of a scalable photo sharing system with focus on end user privacy.

The system included a backend api, an image store, a custom made qr-
extraction engine based on ZXing, some custom made BI, a responsive website as well as apps for iOS and Android.

User research, adoption of the lean software cycle, BI with Piwik and some
custom made tools, A/B testing

Agile-Coach/Guide of the company

Android Entwicklung, Apache Tomcat, Grails, Hibernate (Java), iOS Entwicklung, Java (allg.), JavaScript, Jenkins, Jira, Objective-C, Spring

4/2008 – 10/2011

Active development & maintenance of the company travel & lifestyle CMS.
Technical Project Lead of a team of near-shore developers for
an external customer (Falk AG).

Developing a white-label version of the belocal Regio-CMS in collaboration
with Deutsche Messe Interactive.

Mobile Applications for the OVI-Store in collaboration with Nokia.

Conceptualisation of a mobil travel guide for the prototype of the Puma
Phone in Java mobile.

mySQL, Agile Entwicklung, HTML, JavaScript, PHP

4/2006 – 11/2011

Responsible for architecture and development of a maintenance system for real estate assets.

Realisation of a server component as well as web interfaces and mobile client applications.

Planning & developing various back-office applications as well as custom
tailored solutions for external and internal clients.

SQL, Windows Server (allg.), .Net Framework (Microsoft), C#, SOAP (Simple Object Access Protocol), HTML, JavaScript