Denis Sergeev Email & Phone Number

Cary, NC, US

Moscow, Russia

• Manage distributed DevOps engineers team of 4 ensuring the smooth operation of development and testing infrastructure of a department of 100+ employers. Provide leadership and mentoring of my team, help to create a.
• Managed company Dev and QA infrastructure deployed on on-premise VMWare VSphere. Implemented a monitoring system based on Zabbix to monitor the status of 150+ virtual machines in real time from one location;
• Created, configured and improved 20+ continuous integration/continuous deployment (CI/CD) pipelines for all department projects based on Java using Bamboo and GitLab CI. Built, deployed and ran containerized.
• Set up application log management using Graylog and ELK Stack to easier examine logs for developers and QA, the diagnosing time was reduced half time as a result. Set up Java application tracing using APM which allowed.

Moscow, Russia

• Managed distributed DevOps engineers team of 4, delivering stable work in several areas: Oracle, Java, Microsoft; well-coordinated interaction with different development teams and with other departments;
• Actively promoted DevOps principles such as CI/CD, automation, deployment pipelines within the company. Organized DevOps technologies training for one engineer and Oracle Database Administration knowledge examination.
• Managed federal-level production system of 1M+ users with uptime more than 99,9%. Migrated production Oracle database from custom servers to Exadata. Managed DB monitoring, diagnosed and tuned slow SQL queries.
• Deployed built artifacts to Dev, QA, UAT and production environments according to the build life cycle. Fully automated all projects pipelines, and as a result reduced deployment time by a factor of 4;
• Monitored and troubleshooted server and application issues such as CPU and memory utilization, disk space issues and network activity. Diagnosed application CPU and memory usage, which helped to reduce memory and CPU.
• Deployed high-available Oracle infrastructure using Oracle RDBMS RAC, Standby and multiple Oracle Weblogic clusters;

Moscow, Moscow City, Russia

• Managed a team of 2 system engineers;
• Created infrastructure design, preliminary assessment of capacity and configuration of software and hardware of 3 projects. Deployed, supported, diagnosed and optimized QA and production systems.

Moscow, Russia

• Participated in 20+ projects from kick-off to go-live: estimated time and resources for project implementation, created technical architecture from scratch, hardware sizing, implemented solutions to DEV, QA, UAT and.
• Diagnosed various issues in QA and production systems. In collaboration with Java developer, optimized a system, which led to decrease response time 10 times, decrease CPU consumption by 10, network traffic by 100 at.
• Supported development infrastructure: OS Linux, Oracle databases, Oracle Application Servers, Apache httpd.
• Wrote build-and-deploy Bash automation scripts.

Moscow, Russian Federation

Work in all project phases as technical architect, technical supervisor, system engineer and technical expert. Ensure high performance, reliability, and high availability of databases and application servers. Develop and implement technical solutions into infrastructures: development, test, production. Document developed and implemented solutions. Support.

Moscow, Russian Federation

Deploy, maintain, optimize, backup and recovery Oracle databases and application servers. Deploy, maintain and diagnose applications developed by company to all stages from development to production.

Russian Federation

Deploy, manage, backup, recovery and optimize Oracle databases and application servers. Design, develop and tune Oracle PL/SQL applications.