Christian Dülberg - DevOps Engineer for Cloud Infrastructure

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Plagiari, Greece

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Experience

Aug 2021 - Sep 2025

4 years 2 months

Greece

DevOps Engineer

KfW

Optimization, maintenance, and support of the cloud infrastructure in Microsoft Azure for KfW customer projects
Migration from cloud-native services to Container Apps and setup of containerized infrastructure with Kubernetes
Implementation and maintenance of the Landing Zone Hub & Spoke cloud automation architecture
Implementation and maintenance of pipelines (Medallion, AI) for consolidating and presenting all ecologically/economically relevant company data (Databricks, Data Lake, Azure Fabric, Power BI)
Automation of the application infrastructure (IaC, CI/CD) across all stages (Dev, Test, Production) using Git, Terraform, Ansible, and Azure Pipelines
Development and implementation of the required cloud authorization structures (RBAC, Entra ID, Security Policies)
Error analysis, stabilization, and security measures using Splunk and Elastic Search in a 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 the cloud infrastructure in AWS for DB Energie customers
Automation of CI/CD across all stages (Dev, Test, Integration, Production) using Git/Jenkins pipelines and CloudFormation
Setup and shutdown of EC2 and RDS instances (manually, 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 Landesbanken and Sparkassen
Implementation and configuration of application containers for Dev, Test, Int, and Prod (automation, scripting, Shell, Ruby)
Log management, normalization, and consolidation, Datastream 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

Investigation of possible 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 for testing and comparison
Setup of sample PoCs for IaaS, PaaS, SaaS, and FaaS
Unified data streaming and analytics of heterogeneous data pools
Setup of a Private Cloud with OpenShift in the 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 the operation of banking applications in payment transactions and banking systems (multi-channel/multi-tier 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 with code comparison security checks 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 start-up 365FarmNet in the cloud and big data environment
Implementation of an OSGi model, microservices and data streams with Kafka/Felix/Karaf
Setup of multi-tier components and databases
Automated deployment in the cloud (AWS, MS Azure, Cloudbricks) using Chef Server-Client and Kubernetes (Proof of Concept)
Operation as an on-premise infrastructure at Hosteurope
System access management and certificate management
Log management and analysis
Monitoring and problem management
Configuration, test, 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 multichannel 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 the operation of 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
Monitoring of release and configuration management
Second-level support for call centers
Organizational data center management
Documentation and knowledge management

May 2007 - Nov 2011

4 years 7 months

Greece

DevOps-Engineer/CTO

Multihosting OE

Founding and launching a Greek hosting provider, including infrastructure development and operation
Development of modern pricing structures 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

Systemadministrator/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 upkeep 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 for in-house solutions in document management, scanner solutions and data analysis tools
Implementation for customers 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 introducing 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 implementing an internet portal on weddings with local businesses
Design, 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
Development of modern pricing structures, advertising and sales strategies
Documentation and knowledge management

Jun 1996 - Sep 1999

3 years 4 months

Germany

Student Assistant

GfAH mbH

Support with data collection, library and internet research
Assistance with projects on occupational safety measures and workplace ergonomics

Industry experience

See where this freelancer has spent most of their professional time.

Experienced in Information Technology, Banking and Finance, Media and Entertainment, Professional Services, Advertising, and Agriculture.

Information Technology

Banking and Finance

Media and Entertainment

Professional Services

Advertising

Agriculture

Business area experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Operations, Customer Service, Product Development, Research and Development, and Marketing.

Information Technology

Operations

Customer Service

Product Development

Research and Development

Marketing

Summary

For more than 25 years, I have primarily worked as a System Administrator and DevOps Engineer in Germany and other European countries. I have extensive practical experience in planning, implementing, securing, and maintaining complex on-premise and cloud-based IT systems. My work reflects a deep understanding of the fundamentals and methods required to handle modern requirements and technologies. Whether as part of a team or working independently, I work quickly, solution-oriented, and sustainably.

Skills

Cloud Computing
Scripting
Quality Assurance
Monitoring
It Security/Siem
Networks
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

Fachhochschule Bochum

Studies · Electrical Engineering · Bochum, Germany

Oct 1990 - Jun 1992

Technical College of Electrical Engineering

Electrical Engineering · Bochum, Germany

Oct 1980 - Jun 1985

Nolte GmbH

Vocational Training · Electrical Installer · Bochum, Germany

Statistics

Experience

Total positions 14

Experience in Information Technology 13 y

Avg length 2 y 4 m

Longest experience 5 y 6 m

Global experience

Countries worked in 2 (Germany, Greece)

Primary country Germany

Expertise

Recent roles DevOps Engineer, DevOps Engineer/Coordinator, Application Manager

Main industries Information Technology, Banking and Finance, Media and Entertainment

Main business areas Information Technology, Operations, Customer Service

Qualifications

Member since

October 2025

Last update

October 2026

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Frequently asked questions

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Christian is based in Plagiari, Greece.

Christian speaks the following languages: German (Advanced), Greek (Advanced), English (Advanced).

Christian has at least 29 years of experience. During this time, Christian has worked in at least 11 different roles and for 12 different companies. The average length of individual experience is 2 years. Note that Christian may not have shared all experience and actually has more experience.

Based on recent experience, Christian would be well-suited for roles such as: DevOps Engineer, DevOps Engineer/Coordinator, Application Manager.

Christian's most recent position is DevOps Engineer at KfW.

In recent years, Christian has worked for KfW.

Christian is most experienced in industries like Information Technology, Banking and Finance, and Media and Entertainment. Christian also has some experience in Professional Services, Advertising, and Agriculture.

Christian is most experienced in business areas like Information Technology, Operations, and Customer Service. Christian also has some experience in Product Development, Research and Development, and Marketing.

Christian has recently worked in industries like Banking and Finance.

Christian has recently worked in business areas like Information Technology.

Christian attended Fachhochschule Bochum for Electrical Engineering.

The availability of Christian needs to be confirmed.

Daily rate distribution

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Average rates for similar positions

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Daily rate avg. 602 €

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Median rate 600 €

The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.

Calculated based on our freelancers’ daily rates as of 25 Oct 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.