Recommended expert

Christian Dülberg

DevOps Engineer

Christian Dülberg
Plagiari, Greece

Experience

Aug 2021 - Sep 2025
4 years 2 months
Greece

DevOps Engineer

KfW

  • Optimization, maintenance, and support of the Microsoft Azure cloud infrastructure for KfW customer projects
  • Migration of cloud-native services to Container Apps and setup of containerized infrastructure with Kubernetes
  • Implementation and maintenance of the hub-and-spoke landing zone cloud automation architecture
  • Implementation and maintenance of pipelines (Medallion, AI) to consolidate and present all ecologically/economically relevant company data (Databricks, Data Lake, Azure Fabric, Power BI)
  • Automation of application infrastructure (IaC, CI/CD) across all stages (Dev, Test, Production) via Git, Terraform, Ansible, and Azure Pipelines
  • Development and implementation of required cloud permission structures (RBAC, Entra ID, Security Policies)
  • Error analysis, stabilization, and security measures via Splunk and Elastic Search in the DevSecOps environment
  • Administration of Linux (RHEL 8, 9; SLES) and Windows Server
  • Incident, change, and release management (ServiceNow, ITSM, Jira, HPESM)
  • Scripting (Bash, PowerShell, HCL, YAML)
  • Process automation and optimization in agile CI/CD pipelines
  • Documentation and knowledge management
Aug 2020 - Apr 2021
9 months
Germany

DevOps Engineer/Coordinator

DB Systel

  • Optimization, maintenance, and support of AWS cloud infrastructure for DB Energie customers
  • Automation of CI/CD across all stages (Dev, Test, Integration, Production) using Git/Jenkins pipelines and CloudFormation
  • Setup and teardown of EC2 and RDS instances (manual, Ansible AWX, CloudFormation)
  • Infrastructure as Code (Terraform, Ansible)
  • Automated patch management (OS level, VMs), error analysis, and stabilization
  • Administration of Linux and Windows
  • Incident and change management (ITSM, Jira)
  • Scripting
  • Process automation and process optimization
  • Documentation and knowledge management
Sep 2019 - May 2020
9 months
Germany

DevOps Engineer

FITS

  • Optimization, maintenance, and support of the FreeBSD-based secure cloud infrastructure for state banks and savings banks
  • Implementation and configuration of application containers for Dev, Test, Int, and Prod (automation, scripting, shell, Ruby)
  • Log management, normalization and consolidation, data stream SIEM with Elastic Search
  • Resource monitoring
  • Multi-level support for configuration, deployment and release management, incident and escalation management, network/firewall/DNS, and software implementation
  • Process automation and process optimization
  • Documentation and knowledge management
Oct 2017 - Aug 2019
1 year 11 months
Germany

DevOps Engineer

Postbank Systems AG

  • Analysis of potential migrations of banking software systems to the cloud (lift-and-shift)
  • Evaluation and implementation of cloud computing (private cloud, hybrid cloud) with AWS, MS Azure, and GCP in testing and comparison
  • Setup of exemplary PoCs for IaaS, PaaS, SaaS, and FaaS
  • Unified data streaming and analytics of heterogeneous data pools
  • Setup of a private cloud with OpenShift in data centers
  • Implementation of BaFin compliance requirements
  • Operations access management (OAM) and controlled assignment of access rights
  • Log management and analysis
  • Resource monitoring
  • Documentation and knowledge management
Oct 2014 - Oct 2017
3 years 1 month
Germany

Application Manager

Postbank Systems AG

  • Support for operating banking applications in payment processing and core banking systems (multichannel/multitier components)
  • Automated deployments through the change management process (Dev, Test, Int, Prod)
  • Operations access management and controlled assignment of access rights
  • Establishment of interfaces and workflows
  • Support for code compare security audits for BaFin
  • Batch processing, creation and maintenance
  • Log management and analysis
  • Resource monitoring
  • Fraud detection and prevention
  • Incident, escalation, and change management
  • Documentation and knowledge management
Oct 2013 - Sep 2014
1 year
Germany

DevOps-Engineer

Claas Agrosystems

  • Setup and operation of the IT infrastructure for the 365FarmNet startup in a cloud and big data environment
  • Implementation of an OSGi framework, microservices, and data streams with Kafka/Felix/Karaf
  • Setup of multi-tier components and databases
  • Automated provisioning in the cloud (AWS, MS Azure, Cloudbricks) using Chef server-client and Kubernetes (proof of concept)
  • Operation as an on-premise infrastructure at Hosteurope
  • Access management and certificate management
  • Log management and analysis
  • Monitoring and problem management
  • Configuration, testing, deployment, and release management
  • Network planning and DNS management
  • KPI analysis and unified data analysis (Spark, Kafka, Databricks)
  • Documentation and knowledge management
Aug 2012 - Sep 2013
1 year 2 months
Germany

Application Manager

Postbank Systems AG

  • Implementation of the multi-tier application TXSuite for managing and processing covered refinancing at BHW
  • Setup of the multi-channel architecture and databases
  • Integration of technical interfaces into the enterprise application landscape
  • Incident and escalation management
  • Batch processing and monitoring (24/7)
  • Log management, analysis, and monitoring
  • Creation of system status dashboards and reporting
  • Optimization of application structures
  • Documentation and knowledge management
Dec 2011 - Jun 2012
7 months
Germany

Operational Analyst

ING-Diba AG

  • 24/7 support for operating the on-premise IT infrastructure from the command center
  • Monitoring of all IT-supported business processes
  • Escalation and incident management
  • Process management and continuous improvement
  • Oversight of release and configuration management
  • Second-level support for call centers
  • Organizational data center administration
  • Documentation and knowledge management
May 2007 - Nov 2011
4 years 7 months
Greece

DevOps-Engineer/CTO

Multihosting OE

  • Founded and started up a Greek hosting provider, developing and operating the infrastructure
  • Developed modern pricing models for the EU market
  • Planning, implementation, and operation of dedicated and virtualized server systems
  • Network, firewall, and security concepts
  • Accounting and business logic
  • Configuration and lifecycle management
  • Log management and monitoring
  • Problem and escalation management, as well as helpdesk/multi-level support
  • Backup strategies
Apr 2006 - Oct 2011
5 years 7 months
Greece

System Administrator/Developer

Ratio Software Factory

  • Design, development, implementation, and operation of the Mistral ERP system (in-house development)
  • Creation of new forms and functions in the internal development framework
  • Maintenance and servicing of databases
  • Development of migration and integration components
  • Deployment and release management
  • Customer helpdesk (multi-level support)
  • Documentation
Feb 2004 - Apr 2006
2 years 3 months
Greece

Application Manager/System Administrator

Metropolis SA/Emmetron SA

  • Operation, service, and support of in-house developments in document management, scanner solutions, and data analysis tools
  • Implementation for clients in the Balkan region
  • Quality assurance and test automation
  • Development of a package distribution system with fuzzy logic and AI elements
  • Multi-level customer support (Greek, English)
  • Release and deployment management
  • Establishment of interfaces to ERP systems
  • Documentation and knowledge management
Feb 2002 - Feb 2004
2 years 1 month
Greece

System Administrator

Typos Thessaloniki Newspaper

  • Ensuring 24/7 operation of the IT infrastructure and introduction of modern technologies
  • Administration and maintenance of server infrastructure, networks, and Windows terminals
  • Implementation and maintenance of Linux file servers and print servers
  • Design, implementation, and operation of the newspaper's first online edition
  • Image editing (QuarkXPress, Photoshop)
  • Documentation and knowledge management
Mar 1999 - Jan 2002
2 years 11 months
Germany

CEO/CTO/Development

Sagytar Web Arrangements

  • Founding a partnership and launching a wedding-focused online portal with local businesses
  • Concept, development, and maintenance of websites and e-commerce applications for SMEs
  • Development of an online portal as an advertising platform with planning tools for customers
  • Creation of modern pricing structures and marketing and sales strategies
  • Documentation and knowledge management
Jun 1996 - Sep 1999
3 years 4 months
Germany

Student Assistant

GfAH mbH

  • Assistance with data collection, library and internet research
  • Collaboration on projects related to occupational safety measures and workplace ergonomics

Summary

For more than 25 years, I have primarily worked as a System Administrator and DevOps Engineer in Germany and across Europe. I have extensive hands-on experience in planning, implementing, securing, and maintaining complex on-premises and cloud-based IT systems. My work reflects a deep understanding of the fundamentals and methods required to meet modern demands and technologies. Whether as a team member or working independently, I work quickly, stay solution-focused, and act sustainably.

Skills

  • Cloud Computing
  • Scripting
  • Quality Assurance
  • Monitoring
  • It Security/siem
  • Networking
  • Windows
  • Linux
  • Virtualization
  • Containerization
  • Docker/kubernetes
  • Ci/cd Pipelines
  • Lifecycle
  • Testing
  • Agile Methods
  • Itsm

Languages

German
Advanced
Greek
Advanced
English
Advanced

Education

Oct 1992 - Jun 1999

Bochum University of Applied Sciences

Studies · Electrical Engineering · Bochum, Germany

Oct 1990 - Jun 1992

Technical High School for Electrical Engineering

Electrical Engineering · Bochum, Germany

Oct 1980 - Jun 1985

Nolte GmbH

Apprenticeship · Electrician · Bochum, Germany

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