Taher S. - DevOps Engineer

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Hamburg, Germany

Experience

Apr 2025 - Present

6 months

DevOps Engineer

Confidential

Collaborating with developers, security, and operations teams to align requirements
Supporting product owners and development teams in deploying logging and monitoring solutions based on the Elastic Stack
Developing and unifying log schemas and defining practical standards for observability
Designing and enhancing logging architectures for complex, distributed multi-tenant environments
Connecting application and infrastructure logs, as well as security tools and metrics
Optimizing data flows and modeling for analysis and reporting purposes
Building automated infrastructures using Terraform/Terragrunt and Ansible
Maintaining and evolving CI/CD pipelines in GitLab, as well as automated development environments in Hetzner Robot
Operating and automating Proxmox clusters, including Ceph storage
Setting up and running Kubernetes (k3s) clusters on Fedora CoreOS, including core services like Vault, OpenLDAP, and HAProxy
Implementing security-critical infrastructures according to BSI basic protection and securing existing systems
Supporting the operation of solutions in cloud environments (e.g., AWS)
Working in agile teams using Scrum and Kanban
Technologies/Applications: Elastic Stack (Elasticsearch, Logstash, Beats/Elastic Agent, Kibana), Terraform, Terragrunt, Ansible, GitLab CI/CD, GitOps, Proxmox, Proxmox Ceph, Kubernetes (k3s), OpenShift, Helm, Kustomize, Vault, OpenLDAP, HAProxy, Hetzner Robot systems, AWS, Prometheus, Grafana, Linux/Windows syslog, Docker, NGINX, Apache, Security & Compliance (BSI basic protection, SIEM/SOC)

Apr 2024 - Mar 2025

1 year

DevOps Engineer

Bitmarck Technik GmbH

Working in an agile Kanban team
Migrating monolithic applications and microservices to OpenShift in a scalable microservices architecture
Building and maintaining CI/CD processes for automated deployments with GitLab and ArgoCD following GitOps principles
Developing logging and monitoring strategies with the Elastic Stack (Elasticsearch, Logstash, Kibana, Beats), including dashboards, visualizations, and alerting
Creating log schemas, normalizing and enriching data for improved observability
Setting up monitoring dashboards in Kibana and extending observability with Prometheus and Grafana
Managing secrets using kubeseal and sealed secrets, and securing platform components according to BSI basic protection
Onboarding microservices to OpenShift, including Helm chart integration and Kubernetes Kustomize templates
Integrating a 3Scale manager for load balancing and incorporating a web application firewall into the namespaces
Optimizing performance and designing high-availability concepts for Elastic clusters and microservice deployments
Building and operating logging and monitoring architectures for multi-tenant environments
Integrating Prometheus blackbox exporters to collect microservice metrics
Setting up ELK and Logstash pipelines to process and standardize logs from multiple clients
Implementing load balancing and reverse proxy with NGINX/HAProxy
Technologies/Applications: Kubernetes, OpenShift, ArgoCD, on-premise, OAuth2, GitLab, GitOps, Helm, Kustomize, Prometheus, Grafana, PaaS, ELK, NGINX, Apache

Sep 2020 - Apr 2024

3 years 8 months

DevOps Engineer

Airbus S.A.S.

Working in an agile SAFe team and actively supporting the transformation of legacy systems
Migrating a monolith to a microservices architecture and building a scalable container platform
Integrating all changes into CI/CD pipelines with Jenkins and Docker, including automated testing and quality assurance
Building an automated infrastructure with deployment and service templates, as well as self-healing mechanisms using Ansible
Implementing logging and monitoring solutions with the Elastic Stack (Elasticsearch, Logstash, Kibana) and standardizing log formats for various services
Connecting security and compliance tools to the logging architecture, and normalizing and correlating logs for improved observability
Setting up dashboards to monitor environments with Prometheus, Grafana, and Kibana, including performance and capacity analyses
Integrating static code analysis (SonarQube) into the development process to ensure code quality and compliance
Containerizing and orchestrating services with Docker and Kubernetes, including building multi-tenant structures
Configuring load balancers with HAProxy and securing the platform with reverse proxies and HTTPS connections (including SSL certificates, HSTS, OCSP stapling)
Conducting performance and load tests with Citrus to ensure system stability
Building a proof of concept with a deployment pipeline in OpenShift and migrating to AWS cloud infrastructure
Provisioning and setting up integration, validation, and production environments with Ansible and Terraform
Developing security-critical architectures according to BSI basic protection and supporting security monitoring in cloud and on-premise environments
Managing version control with Git and collaborating according to agile principles
Technologies/Applications: Shell, Docker, Kubernetes, MongoDB, OpenShift, Gradle, Ansible, AWS, SaaS, GitLab, Kanban, Git, SAFe, Citrus

Apr 2020 - Aug 2020

5 months

Backend Developer

Bosco Consulting GmbH & Co. KG

Working in an agile team using Scrum
Implementing a web service to automatically generate profiles for applicants
Connecting a MongoDB database for applicant data
Integrating all changes into a continuous integration pipeline with OpenShift
Containerizing and orchestrating the application with Docker and Kubernetes on AWS
Setting up version control with GitLab
Provisioning infrastructure on AWS with Terraform
Configuring IAM with Terraform
Implementing autoscaling with Terraform
Technologies/Applications: Kotlin, Docker, Kubernetes, MongoDB, OpenShift, Terraform, Gradle, AWS, Ansible, AaaS, Scrum, GitLab

Nov 2018 - Mar 2020

1 year 5 months

DevOps Engineer

Hamburg Südamerikanische Dampfschifffahrts-Gesellschaft A/S & Co KG

Working on various projects to automate build and deployment processes for the in-house software GLOBE
Developing build tools with Gradle to simplify and standardize integration and deployment workflows
Creating and maintaining CI/CD pipelines with Jenkins and shell scripting, including automated UI test integration
Automating the deployment of new versions of the Java application and building reusable deployment templates
Introducing containerization and orchestration with Docker and Kubernetes, including basic logging and monitoring concepts
Extending monitoring with Dynatrace through dashboards for production and staging environments, as well as performance and availability analysis
Connecting the Elastic Stack (Elasticsearch, Logstash, Kibana) as a central platform for log collection, visualization, and troubleshooting
Defining logging standards and normalizing logs to unify the data base for security and operations teams
Integrating SonarQube for quality analysis into CI/CD processes to ensure code quality and security standards
Developing a web service with Java and Spring Boot to connect various task-tracking systems of external providers
Optimizing server parameters (worker processes, caching solutions like mod_cache) to improve stability and performance
Supporting the securing of infrastructure and integrating security measures into existing deployments
Connecting GitLab for version control
Technologies/Applications: Java EE, Groovy, Gradle, Shell, Docker, SQL, Kubernetes, SQS/SNS, PaaS, SaaS, OAuth2, GitLab, Apache, NGINX, Jenkins, Dynatrace, AWS, OracleDB, Artifactory, Jira, Kanban, Confluence

May 2016 - Oct 2018

2 years 6 months

System Administrator

Eppendorf University Hospital

Managing complex server applications and their underlying platforms
Supporting the operation of test and production systems
Maintaining and servicing middleware applications
Handling and resolving incidents and service requests in 2nd-level IT operations as part of the incident management process
Classifying and analyzing root causes as part of problem management
Participating in the configuration and asset management process for the configuration items in the area of responsibility
Monitoring and ensuring compliance with applicable service level agreements and processes
Distributing software and updating the application infrastructure with patches and security updates
Carrying out capacity and availability management for the application infrastructure
Technologies/ Applications: ECS, Shell, Linux, Oracle DB, Gradle, Groovy, Scrum, Jenkins, OpenShift, Confluence, Jira, OmniTracker

Oct 2015 - Apr 2016

7 months

Backend Developer

PONTON GmbH

Working in an agile team following Scrum
Designing multiple web services based on a cloud-native approach
Implementing token-based authentication between services and the frontend
Applying a clean architecture pattern
Writing automated UI snapshot tests and unit tests with Gradle and Jenkins within a CI pipeline
Integrating automated Selenium tests into the pipeline
Implementing asynchronous communication between frontend and REST-based services
Analyzing and visualizing user data
Creating trends using neural networks in Python and Anaconda
Technologies/ Applications: Kotlin, Ktor, Python, Anaconda, Selenium, JWT, Jenkins, Gradle, Scrum, GitLab, JUnit