About

Work Experience

• Freelance DevOps, Linus Frotscher IT Beratung

  Feb, 2023 - Present

  I enjoy embracing diverse challenges to keep my work engaging and interesting. Starting to freelance has really enabled me to work on different projects, gaining expertise across various contexts. I had the chance to work on a greenfield project, crafting new environments from scratch to fit the customer's needs. This entailed setting up VMs, a Kubernetes Cluster, and migrating the customer's applications onto both the VMs and the Kubernetes cluster. For the migration of the applications, I dockerized and containerized them to work within one of these environments. Alongside this, I provided applications such as GitLab, Elasticsearch, and Bitwarden through Kubernetes for the customer. Additionally, I developed and maintain the platform for Kubernetes, keeping it updated automatically through the usage of renovate. Lastly, I collaborate with developers located across multiple continents, helping them improve their processes by automating their tests and deployments through GitLab Pipelines.

  • Making applications portable by dockerizing and containerizing them

  • Migrating those applications to either fresh VMs or the Kubernetes cluster

  • Provisioning, managing, and updating an rke2 Kubernetes cluster

  • Developing and rolling out a platform for the Kubernetes cluster, utilizing renovate for continuous and automated updates

  • Rolling out applications such as GitLab, Elasticsearch, and Bitwarden onto the Kubernetes cluster for customer usage

  • Collaborating with developers located across multiple continents, helping them improve their processes by automating their tests and deployments through GitLab Pipelines.

• Site Reliability Engineer, German Edge Cloud

  Dec, 2021 - Present

  With both the cloud and the edge, German Edge Cloud competes in two main markets. In the cloud, German Edge Cloud provides a managed Kubernetes offering based on kkp from Kubermatic. This, in turn, utilizes an OpenStack instance that manages infrastructure across three data centers owned by the company. In the edge market, they offer edge services, enabling customers to self-service VMs at the edge through management software developed by German Edge Cloud. This is, for example, used by the Fraunhofer Institute to run compute-intensive simulations.

  • Development of a deployment setup for the secure rollout of hundreds of applications to dozens of K8s and Openshift clusters using a GitOps fashion with ArgoCD, HashiCorp Vault, Gitlab, Renovate, Helm, the Carvel suite, and Bash.

  • Monitoring, Logging, and Alerting with Grafana, Alertmanager, Prometheus, Thanos, VictoriaMetrics, OpenSearch, Loki, and Opsgenie.

  • Maintenance of multiple Rancher instances providing cluster access management to the entire company. For this, infrastructure on OpenStack was provisioned through Terraform. On that, RKE clusters are set up and Rancher is rolled out onto the clusters.

  • Automation of repetitive tasks using Golang, Python, Ansible, and Bash.

  • Development of a production readiness review used to engage internal teams in an SRE manner.

  • Engagement with internal development teams utilizing the previously outlined production readiness review, including SLIs and SLOs, enabling the teams to increase the reliability of their respective products.

  • Support for the company's platform on multiple clusters and provision of observability.

  • Management of the operations center, a product used to provision OpenStack resources through a simplified UI on customer edges, working with the OpenStack CLI to manage customer workloads.

  • Incident management, including PMAs.

  • Provisioning of a central ArgoCD used across many teams.

  • Automations using Argo Workflows.

• Junior DevOps Engineer, ZENNER IoT Solutions GmbH

  Mar, 2021 - Aug, 20216 months

  • Lifecycle management of all VMs using Ansible.

  • Setup and utilization of Docker's swarm mode.

  • On-premise management of Gitlab and Bitwarden.

  • Development of CI/CD pipelines.

  • Provisioning and configuration of NGINX.

• Working student in the DevOps team, ZENNER IoT Solutions GmbH

  Nov, 2020 - Feb, 20214 months

  • Writing my bachelor's thesis on "Comparing Docker Swarm to Kubernetes in Preparation for Migration Projects."

• Intern DevOps Engineer, ZENNER IoT Solutions GmbH

  Aug, 2020 - Oct, 20203 months

  • Exploring the various teams within the company by sequentially joining each of them.

  • Opting for the DevOps Team.

  • Involvement in Gitlab Pipelines, Dockerfiles, and Ansible.

Skills

Education

Volunteer Work

Interests