DevOps Expert in Cologne

Nikolaus B.

Senior Cybersecurity Consultant |ISO27k ISMS Lead Impl. & Audit |ISB|BSI|GRC|EU AI Act|GRC|BCM|DORA|TPRM

Langenfeld

Last position:

Information Security, IS-Governance & Crossfunctional Governance at Zürich Beteiligungs-AG (Deutschland)

Conducted security assessments for supplier qualification, business unit onboarding, and ongoing reviews of service providers and partners (Ongoing Assurance).
Assessed technical and organizational measures (TOMs) against GDPR and information security requirements.
Handled security reviews and approval processes in the Global Approval Navigator (OneTrust).
Advised business units and IT on information security, security requirements, and risk-appropriate measures.
Supported the development of SOC/SIEM processes and tools as part of the ISMS in line with ISO/IEC 27001.
Analyzed cyber threats and coordinated security objectives and measures to address Security Findings with the SOC team.
Monitored and assessed current security advisories and security-related metrics (KPIs).
Reviewed, assessed risks, and approved exception requests (Security Exceptions).
Independently analyzed and handled Security Events and supported the handling of security incidents.
Planned and supported awareness initiatives to strengthen security awareness.
Created, implemented, and reviewed information security policies and standards.
Conducted protection needs analyses and gap assessments to identify security gaps and risk deviations.
Defined and reviewed technical and organizational risk treatment measures.
Advised on Third Party Governance with consideration of DORA, ISO/IEC 27001, ISO/IEC 27005, ISO/IEC 42001, and BCM in line with ISO 22301.

Jens R.

Technical Product Owner

Kerpen

Last position:

Platform Architect & Senior Developer at Direct client, industrial measurement technology, medium-sized company

Technical leadership across hardware, firmware, and software teams; scope: hardware/firmware team (4 people) and leadership group (5 people)
Consolidated and documented a product family that had grown over more than 15 years and aligned it with CRA compliance — from the bare-metal I/O module to the cloud interface.
Provided the most important customer product with the essential requirements and architecture documentation within two months — for a firmware landscape that had grown over more than 15 years. It now supports the customer’s modernization strategy.
Established a monthly reporting line to the supervisory board and executive board within three months: nine meetings since 12/2025. The report itself is versioned and built from the CI pipeline; it is based on automatically collected activity and release data instead of assessments.
Built a container-based CI/CD infrastructure from scratch: cross-compilation, host tests, and documentation builds in one continuous pipeline.
Introduced declarative QA gates for DevOps and development artifacts — from the start using lefthook instead of pre-commit, executed in a dedicated container image.

Technologies used: arc42, req42, tpo42, docToolchain, PlantUML, ArchiMate, C4 model, ADR, C, C++ (GTest), CMake, Bare Metal (ARM Cortex-M3/M7), OCI containers, Jenkins, lefthook, Prometheus, Grafana, SBOM, CRA, OPC, SCADA, PLC integration, IPv6 migration, Zero Trust, Sociocracy 3.0, Cynefin

Emre S.

Freelance IT Project Manager and Technical Project Lead

Köln

Last position:

IT Project Manager | SAP E-Invoicing Outbound at Rohde & Schwarz

Project: Introduction of statutory-compliant electronic invoicing (outbound, Germany) in SAP for an international technology group.

Project management: Planning, steering and reporting of the E-Invoicing outbound rollout across all affected business areas, including budget and resource coordination.
UAT: Structured user acceptance test with key users per business area, test cases per invoice scenario, and consolidated test results for decision making.
Defect management: Handover and tracking of defects in Jira, including validation of the generated invoices against the statutory schemas.
Cutover, go-live and hypercare: Readiness checks and cutover planning aligned with the statutory deadlines, coordination of go-live and stabilization during hypercare.
Stakeholder management and reporting: Alignment with Finance, Tax, business departments and IT, preparation of status reports and decision papers, and consistent follow-up of open items.
Change management and documentation: Communicated process changes to the business departments, enabled key users, and created process and compliance documentation to ensure traceability and audit readiness.

Armen M.

Interim CTO | Transformation Leader

Odenthal

Last position:

CTO/CPO Platform & Technology at Green Mobility Holding

Overall responsibility for platform transformation across ERP, CRM, PIM and AI-supported process automation
ERP transformation: Introduction and migration to Microsoft Dynamics 365 Business Central
CRM & Growth Stack: Implementation of HubSpot as the central CRM and platform for lead and marketing automation
Product data & Commerce Enablement: Introduction of an ePIM to scale Category Management and digital Commerce processes
AI-supported process automation: Design and introduction of agent-based AI workflows to automate processes in Business Services, Accounting, Tender Management and Marketing
Building a scalable platform organization consisting of Product Development, DevOps, UX, Cloud Engineering and Corporate IT
Introduction of modern product and portfolio governance (e.g. OKRs, portfolio boards, value-based roadmaps) to manage technology-driven initiatives
Harmonization of heterogeneous system landscapes and transformation into a modular, scalable platform architecture (ERP, CRM, PIM, integrated customer journeys)
Coaching and development of Product Owners, Tech Leads, Delivery Managers and UX teams in building a scalable product organization

Yaroslav S.

Senior Low-Code Consultant

Last position:

Senior Low-Code Consultant at Freelancer

Structured analysis and evaluation of business processes
Gathering, documenting, and prioritizing requirements
Creating business-friendly and technically executable process models
Use of Camunda tools
Deriving requirements and interfaces from BPMN diagrams
Coordination with stakeholders and business units
Translating business requirements into technical solution designs
Implementing efficient and tailored applications
Systematic collection, analysis, and documentation of requirements
Prioritizing and validating requirements in close collaboration with stakeholders
Alignment between business and development to ensure shared objectives
Creating use cases, user stories, and acceptance criteria
Continuous requirements and change management throughout the project lifecycle
Define project goals and create project plans
Delegate tasks and monitor project progress
Monitor budgets and inform stakeholders
Mendix: Architecture, development, and maintenance of custom applications (Microflows, Domain Model, Security, XPath)
Modeling Mendix workflows for process optimization
Develop scalable apps with Mendix including REST/SOAP integration with SAP, SQL, Azure & SharePoint
UI design for Mendix using Atlas UI, Fluent UI, HTML, CSS, JavaScript
Develop web & mobile apps with Mendix using agile methods (Scrum, Kanban)
Implement business logic with Mendix Microflows and Nanoflows
Performance optimization and architecture improvements for Mendix applications
Conduct Mendix training
Create technical documentation and best practices for Mendix
Coaching and mentoring for low-code development with Mendix

Patrick D.

Senior AI Software Engineer · Full-Stack · Agentic AI · MCP · LLM

Köln

Last position:

Fullstack Developer

SPA for automated communication of medical findings with role-based access (Sanctum)
Server-side LLM integration (OpenRouter) with structured processing
Automated sending via SMS/voice call (Twilio, ElevenLabs) with queue + status retry
Full test coverage with 80+ documented test cases

Technologies: PHP, Laravel, LLM API (OpenRouter), Twilio, ElevenLabs, Laravel Sanctum, PHPUnit, Playwright, Docker, REST

Hassan A.

IT Consultant

Düsseldorf

Last position:

DevOps & Observability Consultant at ALDI South (Albrecht's Discount)

Supporting the DevOps team in Terraform-managed, multi-region AWS infrastructure to achieve environment parity.
Developed end-to-end CI/CD pipelines using AWS CodePipeline, CodeBuild, and CodeDeploy, automating the build and deployment.
Maintained pre- and post-deployment scripts to automate critical tasks such as database schema migrations and environment sanity checks.
Implemented CI/CD flow specifically for hotfixes via separate Git branches, managing back-merge activities from feature branches to release branches to ensure code integrity through automated conflict resolution.
Deployed a dedicated, lightweight sanity check application hosted cost-effectively on Azure Container Apps to run automated health and basic functional checks as a post-deployment activity triggered via pipeline.
Investigated production incidents through code changes and AWS CloudWatch logs.
Coordinated integration of Dynatrace APM and its APIs for monitoring purposes.
Full stack QA strategist for a high-traffic e-commerce platform built on a layered architecture for the back-end testing of core platform services, especially the order management system in Zed and Glue layers.
Managed automation activities, testing process, and refactoring practices.
Responsible for framework migrations, setup, and training for new automation frameworks.
Promoted a shift-left approach within the QA team and created the test concept.
Participated in meetings with IT managers, business owners, product owners, and team members.
Designed and implemented contract testing to validate API schema compatibility between the order management system and the Zed and Glue layers, reducing production-relevant breaking changes by approximately 3%.
Led the migration to a multi-environment framework that enabled test execution across 4 country configurations from a single codebase.
Integrated automated unit and functional tests directly into the GitLab CI/CD pipeline, reducing pipeline runtime by 32%.
Coached and trained 5 QA engineers across Germany and Hungary in test automation, framework architecture, and best practices.
Architected a layered backend test automation framework separating business logic, API request builders, and the database layer.
Piloted AI-assisted testing with Playwright Agents, the Playwright MCP Server, and GitHub Copilot for automated test generation, execution, and self-healing Playwright scripts.

Alexander B.

Senior Data Engineer

Köln

Last position:

Senior Data Engineer at RWE AG

Architected and maintained data products for renewable energy operations, covering wind turbine, grid-meter, and weather data. Built scalable ETL/ELT pipelines in Azure Databricks using Delta Lake (bronze/silver/gold layers) and processed data in various formats, including structured and semi-structured data. Contributed to a data quality framework supporting table and column documentation, outlier detection, and completeness metrics across all datasets within a data product. In addition, implemented a DORA KPI Databricks dashboard used across all data products. Optimized CI/CD processes in Azure DevOps to streamline deployment across development, test, and production environments.

Technology stack: Azure Databricks, PySpark, SQL, Delta Lake, Unity Catalog, Azure Data Lake, APIs, Dremio, Azure DevOps, YAML, Git, Databricks Workflows, Application Insights, Terraform, OpenAI API, Codex, LLM-assisted workflows

Maurice K.

Senior Solution Architect

Last position:

Solution Architect – Cloud-Native Transformation of IoT Monitoring Platform at NDA / Wind Energy Sector

Led the end-to-end architecture and migration of a legacy on- premise IoT monitoring system to a cloud-native Azure platform within a 17-member development team
Designed and implemented a scalable microservices architecture (Java 21, Spring Boot, Kubernetes, Azure Services), decoupling IoT data streams and eliminating legacy system bottlenecks
Defined technology stack, mentored developers, and orchestrated cross-functional teams in 4 countries to ensure high-quality delivery and alignment with architectural standards
Drove requirements engineering and system redesign, removing years of technical debt and introducing event-driven processing and automated workflows
Key Achievements
Increased system stability and uptime by ~10x, eliminating need for 24/7 DevOps intervention
Reduced hosting costs by ~80% (5x savings) through cloud optimization
Improved performance and scalability, enabling stable handling of high-volume IoT data streams
Delivered successful zero-disruption migration from on-prem to cloud, with strong user satisfaction and reliability from day one

Maurice H.

Senior Product Owner

Hürth

Last position:

Senior Product Owner at Hydra Lynx Ltd

Unified AI initiatives through the central coordination and integration of artificial intelligence projects to increase efficiency and business value.
Identified and prioritized AI use cases through business process analysis and translated them into structured product backlogs and roadmaps.
Led change management activities, including the introduction of new digital tools, communication strategies, and training concepts to support cultural change.
Managed requirements and processes through end-to-end requirements analysis, process modeling, and organizational optimization.
Scaled agile practices (Scrum, Kanban, OKRs) and promoted cross-functional collaboration and continuous improvement.
Supported company-wide digital transformation by leading technical change initiatives and strengthening collaboration models.

Pierre G.

Ansible Automation, Windows Third Level Support

Last position:

Ansible Automation, Windows Third Level Support at DB InfraGO AG

PRISMA project
Ansible automation
Windows third-level support for Windows NT, Windows 2000, Windows 2013, Windows 2016, Windows 2019

Daniel L.

Developer / Software Architect

Kerpen

Last position:

Developer / Software Architect at rffl.io

PHP 8.4
Platform for prize draws: API-first approach with Symfony/API Platform
API Platform 4.2 (REST, JWT, Doctrine/PostgreSQL, API documentation) plus AWS tools
Symfony 7.3 for infrastructure, hosting, and subsequent operation on AWS with ECS
Postgres
AWS RDS, SQS, Fargate, RDS Postgres database, and AWS-SQS message queue
Infrastructure management with Terraform
After successful Terraform implementation, the next organizational step is to establish a GmbH

Baris E.

Senior Cyber Security Consultant | Cyber Defense, DFIR & Security Architecture

Last position:

Founder / Product & Security Architect at Pirpirik

Perform secure code reviews and provide secure-coding guidance across the application and platform architecture.
Engineer infrastructure security and design security-monitoring architecture, incident-response playbooks and Security-by-Design controls.

Alexander K.

Senior QA Engineer | Quality Management | Test Automation | AI & LLM Testing

Kerpen

Last position:

Software Tester at Buhl Tax Service GmbH

AI-assisted creation of test cases and test data
Creation of test cases based on requirements
Execution of manual tests
Defect documentation, retesting and tracking

Technologies & Tools: SCRUM, Jira, Confluence, Zephyr Scale

Fahad R.