Infrastructure Specialist/Software Developer

4/2022 – 1/2023

Feature development and day-to-day platform operations
Drive technical evolution of the IoT platform
Ensure technical alignment with internal and external parties
Technical integration into the company IT landscape

AWS, PKI, Azure, Terraform, Ansible, Consul, CanOpen, Salt, Java, Python, Ruby, Linux, Bash, Dropwizard, C++, CI/CD (GoCD), PostgreSQL}

IT-Infrastrukturspezialist, Softwareentwickler

11/2021 – 1/2023

Replace custom-built IDM with Keycloak
Extend Keycloak with custom Salesforce backed user provider
Implement production ready deployment and monitoring
Periodic security assessment and threat modelling
React and resolve production incidents

Kubernetes, Java, Keycloak, Salesforce, Azure}

IT-Infrastrukturspezialist, Softwareentwickler

7/2021 – 11/2021

Overhaul billing process for Cloud products
Replace manual billing process with automated SAP data export
Load testing and sizing evaluation
Implement and extend monitoring for billing process KPIs
Migration of billing data from TimescaleDB to Elasticsearch
Stabilization of data retrival and report generation


Bash, Kubernetes, Kotlin, Python, Spring Boot, TimescaleDB, WSDL, SAP}

IT-Infrastrukturspezialist, Softwareentwickler

4/2021 – 6/2021

Story refinement with Stakeholders
Evaluation of technical solutions
Feature development
Code reviews
Level 3 operational support and bugfixing
Build and test process optimizations

Technologies: Bash, Gitlab, OpenStack, OpenVPN, Kubernetes, Kotlin, Spring Boot, PostgreSQL, React

IT-Infrastrukturspezialist, Softwareentwickler

1/2021 – 3/2021

Rollout Infrastructure for Covid19 Portal (non-EU)

Evaluation of hosting provider
Implementation IaC using Ansible
Disaster recovery and security firedrills
Documentation and handover of operations

Technologies: Ansible, Bash, Python

IT-Infrastrukturspezialist

5/2018 – 4/2019

Operate and extend an IoT Platform for Connected Machines

Technical team lead for a global-scale IoT platform
Feature development and day-to-day platform operations including on-call duties
Drive technical evolution of the IoT platform
Ensure technical alignment with internal and external parties
Mentoring and development of graduates
Evaluation of new technologies
Technical integration into the company IT landscape
Ensure and oversee secure and stable operations

Technologies: AWS, PKI, Vault, Ansible, Terraform, CanOpen, Java, Kotlin, Python, Ruby, Linux, Bash, Dropwizard, Spring Boot, HiveMQ Angular, C++, CI/CD (GoCD, Concourse), PostgreSQL

IT-Infrastrukturspezialist, Lead Developer

3/2017 – 5/2018

Building an IoT Platform for Connected Machines
Implementation, continuous integration and delivery of a global-scale IoT platform
Continuous integration, testing and delivery for embedded software on IoT devices
Guiding clients on the selection and introduction of cloud-based infrastructures in the context of continuous delivery/deployment
Teaching DevOps principles and general cloud operations for internal employees
Implementation of Java-based IoT backend
Design and implementation of a PKI for secure device communication

Technologies: AWS, PKI, Azure, Terraform, Ansible, Consul, CanOpen, Salt, Java, Python, Ruby, Linux, Bash, Dropwizard, C++, CI/CD (GoCD),
PostgreSQL

DevOps, Softwareentwickler

4/2016 – 12/2016

Live migration of a running Online Platform into AWS
Migration of a .NET based monolith hosted on premise towards a Java/Scala based microservice architecture continuously delivered in AWS
at Auto Scout24
Supporting clients on their migration path from a traditional IT department structures to cross-functional teams backed by DevOps principles
Planning and implementation of a CI/CD process
Implementation of Java/Scala based microservices
Proactive monitoring of security events
Chaos engineering to ensure platform stability

Technologies:} AWS, Cloudformation, Scala, Java, Ruby, Linux, Bash, ELK Stack, Akka, Play, CI/CD (GoCD), DynamoDB

DevOps

3/2007 – 4/2016

Conception and development of a company-wide, model-based Java framework for software development projects
Planning and implementation of a continuous integration/deployment solution
Development, maintenance and monitoring of the project infrastructure
Transformation of traditional on-premise infrastructure into an XEN-based virtualized environment
Introduction of a Puppet-based configuration management for all aspects of the project infrastructure

Technologies: Puppet, Java, Python, GWT, Sparx Enterprise Architect, UML, Eclipse RCP, Linux, Bash, XEN, Weblogic, Zabbix, Graphite, Oracle, Mysql

IT-Infrastrukturspezialist, Softwareentwickler

9/2002 – 3/2007

Operation and monitoring of all aspects from network, up to and including operating system level for the company data center
Second and third level support including 24/7 on-call for data center operations
Development of internal tools needed for the day-to-day help desk tasks (issue tracking, inventory, software deployment automation)

Technologies: Linux, Windows, PHP, Java, Linux, Bash, Icinga, MsSQL, Mysql, TCP/IP, DNS, HTTP, Cisco, Ethernet

IT-Infrastrukturspezialist