COSMIN VOINEA

As a DevOps Team Lead, I’ve been responsible both for hands-on technical work and for leading a small DevOps team. I act as incident manager for all the applications where I’m the main owner, making sure issues are handled fast and communicated clearly. I also designed the full technical architecture for these systems, including how Kafka, MongoDB, Redis and other components.

Main responsibilities:

• Led a DevOps team, helping with task planning, onboarding, and technical guidance.
• Took care of incident management, including coordination during outages, root cause analysis, and follow-ups.
• Created detailed reports and dashboards for application performance, availability, and alerting.
• Designed and maintained the full architecture of microservice-based applications running in Kubernetes, using Kafka for async messaging and Mongo/Redis/PostgreSQL as storage layers.
• Automated infrastructure and configuration using Ansible and Python.
• Worked closely with developers, testers, and product owners to solve production problems, plan improvements, and optimize resources.

I have worked in a hybrid infrastructure (Oracle Linux 9 and Windows Server 20xx), focusing on automation, observability, and reliable delivery of microservice-based applications deployed in Kubernetes. My responsibilities included implementing scalable DevOps solutions using GitOps principles, infrastructure-as-code, and modern monitoring stacks.

Key Responsibilities and Achievements:

• Managed microservices running in Kubernetes clusters, ensuring high availability and performance.
• Implemented GitOps workflows for consistent and auditable deployments, using Azure DevOps as the CI/CD backbone.
• Developed Ansible playbooks and automation scripts in Python to manage infrastructure, configuration, and deployment processes.
• Maintained CI/CD pipelines in Azure DevOps for multi-environment deployments, enabling faster delivery cycles with minimal downtime.
• Built and operated robust monitoring and alerting systems using Prometheus, AlertManager, and Grafana.
• Set up centralized logging with the ELK stack (ElasticSearch, Logstash, Kibana) for efficient log aggregation and troubleshooting.
• Integrated Apache Kafka for asynchronous communication, and supported services relying on Redis, MongoDB, and PostgreSQL.
• Performed root cause analysis of incidents and collaborated with developers to optimize performance and service behavior under load.

Technology Stack:

• Operating Systems: Oracle Linux 9, Windows Server 2016/2019/2022
• Orchestration & Containers: Kubernetes
• Infrastructure as Code: Ansible, GitOps
• Scripting & Automation: Python
• CI/CD & DevOps: Azure DevOps
• Monitoring & Logging: Prometheus, AlertManager, Grafana, ELK Stack
• Messaging & Databases: Kafka, Redis, MongoDB, PostgreSQL, MSSQL

• Setting up tools and required infrastructure
• Defining and setting development, test, release, update, and support processes for DevOps operation.
• Troubleshooting and fixing the code bugs together with developers
• Monitoring the processes during the entire lifecycle for its adherence and updating or creating new processes for improvement and minimizing the wastage
• Building automated processes wherever possible.
• Identifying and deploying cybersecurity measures by continuously performing vulnerability assessment and risk management
• Incidence management and root cause analysis
• Selecting and deploying appropriate CI/CD tools
• Working on continuous improvement and build continuous integration, continuous development, and constant deployment pipeline (CI/CD Pipeline)
• Monitoring and measuring customer experience and KPIs
• Managing periodic reporting on the progress to the management and the customer

• Directly involved in implementation and support phases of bank projects based on IBM, Oracle, Microsoft and open source technologies.
• Application server and database administration;
• Install, configure and optimize for security or performance the software packages, releases/builds, updates and hot fixes in production environments;
• Responsible for Administration and Maintenance of Documentum Suite (Content Server 6.5/7.1, DA, DCM, Composer, DFS, DFC, Captiva InputAccel, BOF, Process Builder, Application Builder, JBoss, Tomcat, Captiva);
• Database maintenance, database reports, running sql scripts according to the new business requirements;
• Involved in automation phase of deploying software applications:
• Working with Ansible Tower automation tool; creating virtual machines for testing purposes;
• Automate the installation and deploying procedures for IBM Websphere using JYTHON scripts;
• Creating docker containers using custom images.
• Monitoring availability, performance and capacity of applications and components using monitoring tools: Nagios, Riverbed, Oracle Cloud Control, WebSphere Application Server Performance Tuning Toolkit;
• Using ControlM tool for scheduling restart operations and other business logics;
• Close collaboration with other departments (Level 1 Support, Technical Project Management Department, Development Department) in order to perform troubleshooting, fault acknowledgment and fault analysis for various scenarios;
• Participate in disaster recovery scenarios;
• Experience with publishing applications for iOS and/or Android platforms;
• Taking part to Incident, Problem and Change Management processes, solving issues and documenting problem root cause;
• Logging and documenting / Tracking defects and functionality errors in Jira;
• Creating and maintaining infrastructure documentations up to date.

• Handled 100+ daily inbound calls and tickets while providing superior customer service to customers as it pertains to account support and technical support.
• Made outbound service calls to resolve customers' problems and inquiries, including but not limited to tech support and account information.
• Ensured to compute all relevant information into customers account for future referencing.
• Administered repairs, upgrades and completed configuration of PC's and related peripherals.
• Resolved problems within Microsoft office (outlook, excel, etc.).
• Worked with Active Directory to build user network profiles, reset passwords, unlock accounts, etc.
• Installed, repaired and setup computer peripherals.
• Performed set-up, break-down, and transport of company electronic equipment on an as-needed basis.

• Responded to requests for technical assistance in person via phone and remotely for the following technologies: Windows based end points (Laptops Desktops & Thin Clients) and Microsoft Office.
• Continually updated personal knowledge of computing hardware operating systems and software.
• Maintained confidentiality and discretion when working with password or sensitive materials.
• Lead the help desk process and request system as needed.
• Direct and resolve with local server issues when they arise.
• Oversee with local tape backups/restores.
• Delegate duties as assigned which are inherent to the position of Desktop Support Technician II.