Oleksandr Kovalchuk Email & Phone Number

Chapel Hill, Nc, Us

California, United States

𝗞𝗲𝘆 𝗔𝗰𝗵𝗶𝗲𝘃𝗲𝗺𝗲𝗻𝘁𝘀:► Collaborated with team members to devise a comprehensive plan for migrating WebLogic servers from bare metal to Kubernetes clusters. This architectural shift optimized load distribution, system stability, and reduced infrastructure costs.► Pioneered the development of an advanced monitoring system, enabling swift problem identification and responsive troubleshooting. Significantly reduced response and resolution times.𝗖𝘂𝗿𝗿𝗲𝗻𝘁 𝗥𝗼𝗹𝗲:► Lead the seamless operation of high-load Oracle WebLogic systems, ensuring peak performance and unwavering stability.► Spearhead security compliance efforts, proactively identifying and addressing vulnerabilities to fortify system integrity.► Skillfully orchestrate the testing and deployment of new software releases across test and production environments, reducing downtime and ensuring seamless transitions.► Demonstrate expertise in Oracle WebLogic Server administration, enabling precise configuration and tuning for optimal system functionality.► Employ a meticulous approach to managing a diverse range of software and hardware systems, ensuring their continuous and efficient operation.► Collaborate closely with cross-functional teams to address intricate technical challenges and deliver innovative solutions.► Actively contribute to the development of operational processes and documentation, fostering comprehensive knowledge sharing within the team.

Michigan, United States

► Managed a team of two DevOps professionals, orchestrating the creation of a robust CI/CD system using TeamCity.► Engineered the compilation of source code on ARM NVIDIA Jetson Tx1/2 platforms via Docker containers, enabling efficient and consistent code building.► Established a central deb repository for compiled packages, automating hardware deployment and updates using Ansible. This automation significantly accelerated software delivery and streamlined equipment installation on production lines.► Pioneered the development of an automated nightly testing system, leveraging Docker containers for rapid and consistent testing cycles.► Demonstrated innovation by deploying a cutting-edge test environment within an ARM architecture, ensuring reliable performance across diverse platforms.► Assumed a pivotal role in conducting comprehensive testing on a new hardware iteration of a prototype device, validating its functionality and performance.► Seamlessly integrated technical expertise with leadership acumen, successfully overseeing multifaceted projects that bridged software development and hardware prototyping.► Exhibited a deep understanding of software development principles, deployment strategies, and hardware intricacies, resulting in effective solutions for complex challenges.

Dnipro, Dnipropetrovsk, Ukraine

► Collaborated closely with the Java development team to implement advanced optimization and automation strategies in server management, resulting in a marked enhancement of operational efficiency.► Skillfully managed server infrastructure, ensuring seamless and reliable performance to consistently meet customer demands and project objectives.► Facilitated productive interactions with clients, fostering strong working relationships and aligning server configurations precisely with specific project requirements.► Demonstrated proficiency in configuration management of the software stack, orchestrating precise setups tailored to development, testing, and staging environments.► Played a pivotal role in supporting the development team by provisioning and maintaining crucial test and staging environments, enabling rigorous testing, and facilitating smooth deployment workflows.

Dnipro, Dnipropetrovsk, Ukraine

► Collaborated with cross-functional teams to manage and enhance the Hadoop stack, ensuring seamless big data analysis capabilities.► Orchestrated virtualization using AWS and Docker, optimizing system efficiency and scalability for improved performance.► Proficiently administered Linux systems (Debian, Ubuntu), maintaining a stable and secure environment to support operations.► Leveraged expertise in databases (MySQL, S3) to efficiently store and retrieve data, enabling effective analysis and insights.► Configured and fine-tuned web servers (Nginx, Tomcat, Apache, PM2) to facilitate smooth application hosting for seamless user experiences.► Implemented robust monitoring strategies using Datadog, ensuring real-time insights into system performance and proactive issue resolution.► Streamlined development workflows by establishing deployment and continuous integration processes using Jenkins, enhancing productivity.► Spearheaded the installation and configuration of a cutting-edge big data analysis system, contributing to data-driven decision-making.► Automated source code updates, optimizing development cycles, and reducing manual intervention, leading to efficient software evolution.► Engineered automated optimization procedures and facilitated seamless integration of new data, enhancing data processing efficiency.► Thoroughly documented all processes, ensuring transparency, knowledge sharing, and future scalability for continued growth.

Dnipro, Dnipropetrovsk, Ukraine

► Demonstrated expertise in virtualization technologies, utilizing KVM and Docker to enhance system scalability and resource management.► Mastered various Linux distributions (CentOS, RHEL, Debian), ensuring stable and secure system operations.► Effectively administered diverse databases, including MySQL, Memcache, MongoDB, and Oracle Database 11gR2, optimizing data storage and retrieval.► Skillfully configured and maintained web servers, encompassing IIS, Nginx, Tomcat, and Oracle WebSphere 8.5.5, ensuring seamless hosting of applications.► Successfully integrated OpenLDAP for streamlined access management, bolstering system security and user authentication.► Customized Zabbix for tailored monitoring solutions, improving real-time insights into system performance.► Spearheaded the implementation and enhancement of monitoring frameworks, automating discovery processes and data collection through Elastic Stack.► Played a pivotal role in maintaining high Service Level Agreements (SLAs) for the company's infrastructure.► Provided dedicated support, recommendations, and guidance to clients, fostering strong relationships and satisfaction.► Led the integration of all access points to OpenLDAP, enhancing user management and security protocols.► Streamlined documentation workflows, ensuring comprehensive and accessible documentation for processes and procedures.► Revamped Git flow processes, optimizing version control and collaboration within development teams.► Developed scripts to seamlessly integrate developer APIs and services into Zabbix, enhancing monitoring capabilities.► Enhanced build scripts for TeamCity, resulting in improved continuous integration and delivery workflows.► Implemented robust backup strategies and plans, safeguarding critical data and ensuring business continuity.► Strengthened security protocols through systematic updates, firewall policy enhancements, and other measures.

Dnipro, Dnipropetrovsk, Ukraine

► Provided robust support for a web system based on CentOS. Managed a diverse technology stack including nginx, Apache, PHP, PHP-FPM, Percona MySQL Server, MongoDB, Redis, RabbitMQ, Sphinx, and Node.js.► Played a key role in performance optimization, automation, and backup management to ensure the efficiency and reliability of the system.► Managed monitoring systems utilizing tools like Chef and Zabbix to ensure real-time insights into system performance.► Proficiently worked with tools like JIRA and Confluence to facilitate streamlined collaboration and project management.

Ukraine

► Served as a Unix System Administrator for a prominent e-commerce project at OWOX, enhancing the reliability and performance of critical web systems.► Managed and maintained a web system based on CentOS, incorporating technologies such as nginx, PHP-FPM, Percona XtraDB Server, Redis, Sphinx, Hadoop, and more.► Took charge of performance optimization, system automation, backup management, and monitoring to ensure seamless operation and efficiency.