26.10.2026 aktualisiert

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Senior Cloud, DevSecOps & Platform Engineer | K8s, OpenShift, IaC, GitOps | AWS, Azure, GCP, STACKIT

Karlsruhe, Deutschland
Weltweit
Bachelor Degree in Computer Science
Karlsruhe, Deutschland
Weltweit
Bachelor Degree in Computer Science

Profilanlagen

Ibrahim_Yesilay_Freelancer_CV_DE.pdf

Über mich

Senior Cloud, DevSecOps & Platform Engineer specializing in Kubernetes, Terraform, CI/CD and automation. I design and operate scalable cloud infrastructures across AWS, Azure and GCP. Reliable, fast-adapting and solution-oriented with strong hands-on experience in modern DevOps

Skills

GCPCloud ComputingCloud-EngineeringConfiguration ManagementDevOpsElasticsearchSCADAOpenShiftOpenStackAnsibleVaultGoogle CloudGitLabKubernetesHashicorpElastic KibanaTerraformOracle Cloud InfrastructureAWS EKSDockerJenkins
Cloud Infrastructure
Kubernetes cluster deployment with Terraform, Helm Charts implementation, and building cloud infrastructure for enterprise applications.

DevOps Engineering
Configuration management with Ansible, CI/CD implementation using GitLab, Jenkins and JFrog Pipelines, and containerization with Docker.

Database Management
Experience with various database systems including MySQL, Oracle, H2, and PostgreSQL for application data storage and management.

Programming Languages
Proficiency in multiple programming languages including Java, Python, C++, C#, VB, JavaScript, PHP, Delphi, Pascal, Assembly, HTML, SQL, and CSS.

Operating Systems
Knowledge of diverse OS platforms including Linux, UNIX, iOS, Android, Solaris, Windows, and Pardus.

Cybersecurity
Development of cybersecurity solutions protecting SCADA systems against cyberattacks.

Elasticsearch Stack
Implementation and management of Elasticsearch for search and analytics capabilities.

Erfahrung

Berufserfahrung5 - 10 Jahre
Freelancer seit2018

Sprachen

DeutschverhandlungssicherEnglischverhandlungssicherTürkischMuttersprache

Projekthistorie

Senior DevOps Engineer

Software and Consulting Company

Internet und Informationstechnologie

10-50 Mitarbeiter

Further development of a highly available Kubernetes infrastructure in Oracle Cloud using Terraform, Ansible, Python, and scripting.
Automation of the deployment of an application stack (Kubernetes, Prometheus, Filebeat, Argo CD, Helm Charts).

Expert Devops Engineer

Online Retailer, Hamburg

Konsumgüter und Handel

>10.000 Mitarbeiter

Automation of IT infrastructure with Ansible, GitLab CI, Jenkins, and Terraform.
Design, deployment, and operation of multiple Kubernetes clusters (On-Prem & OCI/OKE).
Development and delivery of internal applications as Helm Charts.
Optimization of the logging infrastructure (ElasticSearch, Logstash, Filebeat, Log4j2), including integration into Kubernetes and standalone systems.
Automated tool distribution and system configuration via Ansible.
Introduction of Oracle Cloud Infrastructure and development of corresponding Terraform modules.
Migration of Docker build pipelines to GitLab CI with Kaniko.
Development of an automated tool for creating custom worker node images (Terraform, Ansible, OCI CLI, Shell).
Automation of documentation in Confluence/JIRA (dashboards, infrastructure status).
Setup and operation of a centralized authentication and authorization platform with Keycloak (OIDC/SAML, SSO, RBAC), including integration into Kubernetes-based applications and internal tools.
Introduction of Argo CD to support GitOps-based deployments.

Senior Devops Engineer

IT and Cloud Service Provider Ludwigshafen

Internet und Informationstechnologie

500-1000 Mitarbeiter

Automation of cloud and infrastructure with Ansible, Terraform, GitLab CI / Jenkins.
Deployment and operation of Kubernetes and OpenShift clusters (On-Prem and cloud).
GitOps-based deployment of internal applications with Helm and Argo CD.
Centralized monitoring, logging, and documentation automation (ELK stack, Confluence/JIRA).
CI/CD automation and custom cloud image development workflows.

Senior Cloud Engineer

Cloud and Hosting Provider, Karlsruhe

Internet und Informationstechnologie

5000-10.000 Mitarbeiter

Automation of cloud and infrastructure using Ansible, Terraform, GitLab CI, and Jenkins.
Deployment and operation of Kubernetes and OpenShift clusters (On-Prem and cloud environments).
Deployment of internal applications via Helm Charts and GitOps with Argo CD.
Management and automation of logging, monitoring, and infrastructure documentation (ELK Stack, Confluence/JIRA).
Implementation and automation of CI/CD processes and custom image pipelines for cloud environments.

Senior Devops Engineer

Online Retailer, Hamburg

Konsumgüter und Handel

>10.000 Mitarbeiter

Automation of IT infrastructure with Ansible, GitLab CI, Jenkins, and Terraform.
Design, deployment, and operation of multiple Kubernetes clusters (On-Prem & OCI/OKE).
Development and delivery of internal applications as Helm Charts.
Optimization of the logging infrastructure (ElasticSearch, Logstash, Filebeat, Log4j2), including integration into Kubernetes and standalone systems.
Automated tool distribution and system configuration via Ansible.
Introduction of Oracle Cloud Infrastructure and development of corresponding Terraform modules.
Migration of Docker build pipelines to GitLab CI with Kaniko.
Development of an automated tool for creating custom worker node images (Terraform, Ansible, OCI CLI, Shell).
Automation of documentation in Confluence/JIRA (dashboards, infrastructure status).
Setup and operation of a centralized authentication and authorization platform with Keycloak (OIDC/SAML, SSO, RBAC), including integration into Kubernetes-based applications and internal tools.
Introduction of Argo CD to support GitOps-based deployments.

Cybersecurity & DevSecOps Engineer

Tech Startup in Cloud & Cybersecurity, London

Internet und Informationstechnologie

10-50 Mitarbeiter

Implementation of DevSecOps processes (CI/CD security, secret management, IaC security).
Building secure cloud infrastructures (AWS/Azure) and automation with Terraform & Ansible.
Hardening of Kubernetes/container environments incl. vulnerability scanning & compliance checks.
Introduction of security monitoring, SIEM/log analysis, and incident-response workflows.
Development of automated security checks in build/deploy pipelines.


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