Dan A. Zamfir
Verified Expert in Engineering
Cloud Developer
Munich, Bavaria, Germany
Toptal member since June 7, 2021
Dan is a seasoned IT professional and a freelance DevOps engineer with more than 15 years of experience in automation, system administration, and solution support with a proven track record in delivering outstanding results. He is a self-learner, able to handle multiple tasks simultaneously without losing composure, and able to adapt quickly and flexibly to new tasks. Dan has a track record for diagnosing complex problems and consistently delivering effective solutions.
Portfolio
Experience
- Linux - 12 years
- Bash - 12 years
- Unix - 10 years
- DevOps - 6 years
- Python - 6 years
- Git - 5 years
- Kubernetes - 2 years
- Cloud - 2 years
Preferred Environment
Linux, Unix, MacOS, Vim Text Editor, Cloud, Kubernetes, Git
The most amazing...
...full-stack legacy platform automation I've done reduced the downtime from 12 hours to 40 minutes and transitioned from bimonthly to biweekly releases.
Work Experience
Mobile DevOps Engineer
PAYBACK GmbH, Part of the American Express Group
- Provided ownership for Jenkins, Puppet, and mobile servers (20 Ubuntu and macOS).
- Maintained, expanded, and supported continuous deployment solutions using Jenkins and Puppet.
- Performed root cause analysis and troubleshooting for Android and iOS builds.
DevOps/Automation Engineer CE
PAYBACK GmbH, Part of the American Express Group
- Served as an automation engineer, technology owner, and third-level support.
- Developed custom Ansible modules and plugins using Python, as a key member of the implementation team for Ansible.
- Automated solutions for enterprise technologies like WebLogic from binary installation to domain creation and apps deployments, which reduced the deployment and downtime on the production environment from 8 hours to 40 minutes.
Technical Process Management Global
PAYBACK GmbH, Part of the American Express Group
- Acted as technical process manager global, IT analyst, application support, Oracle WebLogic administrator, WebMethods administrator, and provided Jenkins deployment and automated solutions.
- Migrated an old, out of support version of WebMethods from physical SuSE machines to virtualized SuSE machines, before the deadline with minimum experience of WebMethods.
- Led WebLogic migration to RedHat EL running on VMs.
Senior Solution Support and Deployment Analyst
DHL INFORMATION SERVICES (EUROPE)
- Acted as the service owner, problem manager, incident manager, recovery manager, IT analyst, Oracle DBA consultant, application support, and BEA and ORACLE Weblogic Administrator.
- Provided the main support for three global logistic applications including booking, exception management, and warehouse management within a team of 15 members.
- Contributed to multiple projects mainly oriented on application stabilization and/or migration, being the key person in all the tests and deployments.
- Awarded with VESPA (very special achievements) in 2009 and 2011 for successful project results and building sustainable, long-term, and partnership-based business relationships with our customers.
IT Specialist
IBM GSDC
- Provided support for servers, database, and service monitoring for several international customers. Servers like: Windows 2003, AIX, HP-UX, Solaris. Database and applications like Oracle, SAP, Tivoli Storage Manager, and Tivoli Workload Scheduler.
- Solved the most critical issues according to the SLA, redirecting problems to the respective team.
- Performed deployments of Tivoli Monitoring as a contributor of a pilot project and executed daily manual checks on SAP and Oracle.
Experience
Canary Deployment with Spinnaker
Canary is a deployment process in which a change is partially rolled out and then evaluated against the current deployment (baseline) to ensure the new deployment is operating at least as well as the old. This evaluation is done using key metrics that are chosen when the canary is configured.
React and Layr Full-stack App Deployment on GKE with Terraform
Certifications
Google IT Automation with Python
Red Hat Certified System Administrator
Red Hat
Skills
Libraries/APIs
Jenkins Job DSL, Node.js, Jenkins Pipeline
Tools
Vim Text Editor, Git, Jenkins, Terraform, Amazon EKS, Google Kubernetes Engine (GKE), Grafana, Loki, IBM Tivoli Workload Scheduler, WLST, Ansible, Apache Tomcat, Puppet, Jira, Bitbucket, Stunnel
Languages
Bash, Python, Bash Script
Paradigms
DevOps, Automation, Continuous Integration (CI), Continuous Delivery (CD)
Platforms
Linux, Unix, MacOS, Kubernetes, Google Cloud Platform (GCP), Amazon Web Services (AWS), Docker, Spinnaker, AIX, HP-UX, Solaris, Oracle, webMethods, Ubuntu Linux
Storage
MySQL/MariaDB, MongoDB, Oracle DBA
Frameworks
Django, Flask
Other
CI/CD Pipelines, Site Reliability Engineering (SRE), Cloud, Prometheus, Google Cloud Build, Linux Server Administration, IT Automation, MinIO, System Administration, Monitoring, SAP, PeopleSoft, IBM Tivoli Storage Manager, IT Business Analysis, App Support, BEA WebLogic Server, Problem Management, Incident Management, Migration, Oracle WebLogic Application Server, Virtualization, System Migration, WebLogic
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