Krstan Vjestica Email & Phone Number

Novi Sad, Rs

Novi Sad

Experienced Linux System Administrator with over 5 years of hands-on expertise, seeking to contribute my skills and knowledge to a dynamic team. Proven track record in effectively managing Linux environments, implementing DevOps practices, and providing mentorship within the IT community.Sharing experience:- Manage and maintain Linux servers, ensuring optimal performance and reliability.- Implement security measures and best practices to safeguard systems and data.- Configure and deploy Docker containers using Docker Compose and Kubernetes for container orchestration.- Collaborate with development teams to streamline deployment processes and improve efficiency.- Automate routine tasks and system configurations using Ansible playbooks.- Troubleshoot system issues and provide timely resolution to minimize downtime.- Setup and administer various databases including MySQL, PostgreSQL, and MongoDB.- Implement backup strategies and disaster recovery plans to protect critical data.- Monitor system performance and health using monitoring tools like Grafana and Prometheus.- Setup CI/CD pipelines with Jenkins to automate software delivery and testing processes.

Novi Sad, Vojvodina, Serbia

- Installed, configured, and administered FreeBSD and Linux OS environments to ensure system stability and security.- Implemented and managed Vultr and AWS infrastructure to support development and production workloads.- Automated repetitive tasks using Ansible, reducing manual workload and improving efficiency.- Orchestrated containerized applications using Docker, Docker Swarm, and Kubernetes, enhancing deployment consistency.- Managed CI/CD pipelines with Jenkins and GitLab, ensuring seamless integration and delivery of software updates.- Developed and maintained shell scripts for system administration and automation tasks.- Monitored system performance and health using Grafana and Prometheus, ensuring high availability and performance.- Configured and administered Nginx and Apache web servers, optimizing for performance and security.- Conducted routine system maintenance, including updates, patching, and troubleshooting.

Novi Sad

As a freelance system administrator, I have worked with various clients to manage and optimize their system infrastructures. My role involved designing, implementing, and maintaining project environments to streamline development workflows for technologies such as Django, Flask, and React.js. Below is a detailed list of my responsibilities and skills utilized:- Environment Setup for Development Projects: Created and managed development environments tailored for Django, Flask, and React.js applications, ensuring seamless development, testing, and deployment processes.- SSL Certificate Setup with Let's Encrypt: Implemented and managed SSL certificates using Let's Encrypt to enhance the security of web applications.- Version Control with Git: Utilized Git for version control to manage code repositories, facilitate collaboration, and maintain project history.- Virtualization with Vagrant and VirtualBox: Deployed and managed virtualized development environments using Vagrant and VirtualBox to ensure consistency across development teams.- Containerization with Docker and Docker Compose: Leveraged Docker and Docker Compose to containerize applications, enabling scalable, efficient, and reproducible environments.- Configuration Management with Ansible: Used Ansible for automated configuration management and application deployment, ensuring consistency and reducing manual intervention.- Scripting with Bash and Shell: Developed and maintained Bash and Shell scripts for automating repetitive tasks, system maintenance, and environment setup.- Cloud Services Management: Managed cloud-based infrastructure on platforms such as DigitalOcean and Vultr, including server provisioning, monitoring, and scaling.- Database Management: Administered PostgreSQL and MySQL databases, including installation, configuration, performance tuning, and backup strategies.

Serbia

I have managed Linux servers (Ubuntu, CentOS) for various clients, ensuring optimal performance, security, and reliability. My key responsibilities and skills include:- Linux Server Management: Expertly managed Linux servers, including installation, configuration, and maintenance of essential applications such as Docker, Docker-compose, Webmin, Cpanel, and VestaCP.- Application Deployment and Configuration: Successfully deployed and configured applications to support development and production environments, optimizing workflows and ensuring system stability.- Security Implementation: Implemented robust security measures, including firewalls and antivirus software, to protect servers from unauthorized access and threats.- System and Database Backups: Conducted regular system and database backups to ensure data integrity and facilitate quick recovery in case of system failures or mishaps.- System Upgrades and Updates: Regularly upgraded and updated tools and systems to maintain optimal performance, security, and compatibility with the latest standards.- User Support and Communication: Provided effective communication and support to users, troubleshooting issues, and ensuring smooth operation of systems.- Through these experiences, I have developed a strong proficiency in managing Linux-based environments, implementing security protocols, and ensuring system resilience. My commitment to maintaining up-to-date systems and providing exceptional user support has consistently resulted in reliable and secure server operations for my clients.

Novi Sad

Novi Sad, Srbija

Expertise in Unix and Linux system installation, configuration, administration, the development and testing of backup and recovery methodologies, troubleshooting, capacity and performance planning, performance tuning, preventative maintenance, monitoring and alerting setup. Also done with - Solaris administration- VMWare ESXi administration- Git- Vagrant- Samba - Tomcat APP- Ansible

Novi Sad, Srbija

Administration of WordPress based environment Apache MySQL PHP Samba/NFS share Basic Tomcat experience

Kikinda, Srbija

Installation, setup and maintenance of personal computers Windows XP Office suite Registry and system cleaning Installaction and setup of client applications