Profilbild von Christian Pelster DevOps Engineer, Software Developer aus Quickborn

Christian Pelster

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Letztes Update: 29.11.2024

DevOps Engineer, Software Developer

Abschluss: nicht angegeben
Stunden-/Tagessatz: anzeigen
Sprachkenntnisse: Deutsch (Muttersprache) | Englisch (verhandlungssicher)

Dateianlagen

cv-en_291124.pdf

Skills

Linux, Ansible, Salt, Terraform, git, subversion, HiveMQ, Consul, Vault, Nomad, Docker, Vagrant, Kibana, Grafana, ELK, Hetzner Cloud, AWS, GCE, Vim, IntelliJ, GoCD, Jenkins, Gitlab, Github Actions, Concourse, PostgreSQL, Mysql, MariaDB Ecosystems Java, Kotlin, Ruby, Bash, Python, Scala, Eclipse RCP, PHP, JavaScript, Lua, Typescript, C/C++, TCP, IP, DNS, DHCP, CanOpen, MQTT, Cisco, TLS, OpenVPN, IpSec, Nagios/Zabbix/OpenNMS, Web Angular, Vue, Node, js, GWT, CSS, SCSS, HTML5, LESS, IoT, PKI, Java, Dropwizard, Spring Boot, HiveMQ Angular, C++, CI/CD (GoCD, Concourse), continuous integration, cloud, continuous delivery, DevOps, backend, Azure, CI/CD (GoCD), NET, microservices, Cloudformation, ELK Stack, DynamoDB, Java framework, XEN, Puppet, configuration management, Eclipse, Weblogic, Zabbix, Oracle, Data center, operating system, issue tracking, Windows, Icinga, MsSQL, TCP/IP, HTTP, Ethernet, CMS, LAMP, Perl, ERP, CRM, Windows NT/2000, XText, Spring, Hibernate, Derby, Gradle, Selenium, VerneMQ

Projekthistorie

01/2023 - bis jetzt
Cloud migration AWS to Azure
(1000-5000 Mitarbeiter)

• Initial assesment and technical workhops for cloud migration requirments and planing
• Planing and implementation of cloud agnostic Kubernetes cloud platform components
• Technology workhops and knowledge transfer for Kubernetes and helm
• Evaluation and introduction of infrastructure tests
• Assesment and advisory for IDM solutions
• Live migration of VerneMQ MQTT broker cluster

07/2024 - 08/2024
System Landscape Monitoring

* Initial assessment of system landscape
• Implementation of system and application performance monitoring
• Fine‑tuning of dashboard and metrics to detect performance regressions
• Technologies: Hetzner, VMWare ESX, Python, Ansible, Grafana, Prometheus

05/2018 - 04/2024
Technical team lead for a global‐scale IoT platform
Jungheinrich Digital Solutions (Transport und Logistik, 50-250 Mitarbeiter)

  • 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

05/2022 - 11/2023
Hetzner cloud automation

* Initial assessment of current cloud strategy
• Migration to infrastructure as code for cloud provisioning
• Implementation of cloud hostes PostgresSQL database based on Solidblocks
• Training and workshops for cloud operations and disaster recovery
• Technologies: Hetzner, AWS, Terraform, Python, PostgreSQL

04/2022 - 01/2023
Maintenance and operation of IoT Platform for Connected Machines
Jungheinrich (Transport und Logistik, 1000-5000 Mitarbeiter)

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

11/2021 - 01/2023
Implement Keycloak IDM solution
VAiLLANT GROUP BUSiNESS SERViCES GMBH (Industrie und Maschinenbau, 1000-5000 Mitarbeiter)

• 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
• Technologies: Kubernetes, Java, Keycloak, Salesforce, Azure

07/2021 - 11/2021
Extending billing platform and SAP integration
GERMAN EDGE CLOUD (Internet und Informationstechnologie, 500-1000 Mitarbeiter)

• 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
• Technologies: Bash, Kubernetes, Kotlin, Python, Spring Boot, TimescaleDB, WSDL, SAP

04/2021 - 06/2021
Building a custom Multi‑Cloud Frontend for OpenStack and Kubernetes
GERMAN EDGE CLOUD (Internet und Informationstechnologie, 500-1000 Mitarbeiter)

• 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

03/2017 - 05/2018
Building an IoT Platform for Connected Machines
THOUGHT WORKS DEUTSCHLAND GMBH (Internet und Informationstechnologie, 1000-5000 Mitarbeiter)

* 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

04/2016 - 12/2016
Live migration of a running Online Platform to AWS
THOUGHT WORKS DEUTSCHLAND GMBH (Internet und Informationstechnologie, 1000-5000 Mitarbeiter)

* Migration of a .NET based monolith hosted on premise towards a Java/Scala based microservice architecture continuously delivered in AWS at
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* 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

03/2007 - 04/2016
Designing a transportation management solution for a major logistic provider
LUFTHANSA SYSTEMS AG (Transport und Logistik, >10.000 Mitarbeiter)

* 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, Eclipse RCP, Linux, Bash, XEN, Weblogic, Zabbix, Graphite, Oracle, Mysql


09/2002 - 03/2007
Data center operations and helpdesk
LUFTHANSA SYSTEMS AG (Transport und Logistik, >10.000 Mitarbeiter)

* 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

Reisebereitschaft

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Profilbild von Christian Pelster DevOps Engineer, Software Developer aus Quickborn DevOps Engineer, Software Developer
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