Project: Participation in the development of the aggregator uplatform.comTechnologies Used: Kubernetes, Docker, LXC, Gitlab, Nginx, Ansible, Jenkins, MySQL, MongoDB, Clickhouse, PostgreSQL, MemgraphDB, KSQL, Kafka, Nats, RabbitMQ, Redis, Riak, MinIO, ELK, Vault, Sentry, Grafana, Prometheus, VictoriaMetrics, GlusterFS, Pacemaker, Confluence, YoutrackContribution: • Infrastructure documentation had been compiled. All necessary help documents and instructions are created in Wiki. • Ansible roles for the installation and configuration of MySQL, pgsql, clickhouse, elk, prometheus_and_exporters, firewall_fail2ban(iptables), kafka, lxc_install, memgraph, nginx, backups, and others are developed. • Hetzner based infrastructure is deployed (over a hundred servers). • Backup roles and scripts for services and infrastructure are configured. • Internal repositories for deb-packages and compiled necessary deb-packages are created (nginx, exporters, redis with modules, cfssl, alertmanager, VictoriaMetrics, and others). • Monitoring using Prometheus, VictoriaMetrics, Grafana and integrated notifications with Mattermost (Slack) and corporate messenger using Alertmanager are set up. 4 golden signals. Microservices dashboards. • Assisted in building Kubernetes infrastructure and migrating from docker-compose to vanilla k8s. Managed using k9s. • Docker repositories and images for microservices are created (alpine and debian). • Participated in creation and improvement of a shodan-like service for external port monitoring on servers (Go wrapper for nmap). • Clickhouse and Kafka are migrated from Zookeeper to built-in Raft solutions (Kraft and CH_Keeper). • Jenkins jobs for infrastructure deployment and maintenance are created. • Worked with developers to troubleshoot their microservices with the infrastructure. • Onboarded new employees.Results: A large microarchitectural system ready for high loads was released to production.

Project: Participation in the development of the aggregator ksk.expert as a DevOpsTechnologies Used: Gitlab, Bash, Nginx, Apache, Bitrix, Ansible, NodeJS, ASP.NET Core, Yandex.Cloud, MySQL Contribution: • Dedicated server for Gitlab-EE was set up. • Numerous scripts for deployment from Gitlab (via Webhook), application deployment (NodeJS, ASP.Net Core), backup creation and cloud storage were developed. • Project documentation was compiled. Help documents and instructions in Gitlab Wiki and separate projects for the used scripts with comments were created. • VDS based on Yandex.Cloud were deployed (6 servers). • VDS management was configured using Ansible. • A project and instructions for developers on using one of the developed services in Docker were generated (for testing). • Сustom configurations for prod and dev environments on Nginx (proxy, web) and Apache (web) were assembled. • Automatic renewal of SSL certificates from letsencrypt using certbot was implemented. • Consultations and trainings for developers on working with git and gitlab were provided.Results: Automation of development processes was implemented. Established operation on a stack of NodeJS (frontend), ASP.NET Core (backend), and Bitrix (API) and combined through an internal Gitlab

Project: Automation of a vehicle enterprise business as a System AdministratorTechnologies Used: Windows Server, Windows OS, Ubuntu, CentOS, RouterOS, MS SQL Standard, 1C (BP, ZUP, UAT, Document Flow)Contribution: • Equipment failures was reduced by choosing a single, high-quality components supplier. • Internal and external electronic document flow was set up. • Industry solutions from 1C was customized based on the organization's needs (acted as the project manager for the employer). • Test and production servers for 1C were configured on MS SQL (Windows Server 2012 / 2019). • Backup creation for 1C databases was set up in 3 different locations (media, network, cloud). • RDP connection via PortKnocking was configured. • HoneyPot was set up to block intrusion attempts behind the firewall. • SMTP server was established (Ubuntu). • NAS server was launched (CentOS). • Most servers were deployed on VMware ESXi.Results: Automation and uninterrupted operation of a large regional vehicle carrier's business was implemented. Minimizing equipment downtime and user requests during the company's 24/7 operation was secured. Achivied automation level resulted in only one IT specialist needed to serve needs of a company with about 300 employees. Industry solutions of the 1C ERP system were implemented.

Project: Participation in the development of an internal platform for employee training and sales department operations as a System Administrator for Windows/Linux serversTechnologies Used: Windows Server 2012R2, CentOS, Asterisk, MS IIS, UmbracoContribution: • Windows Server on the client's hardware was established. • Asterisk server based on CentOS for WebRTC was deployed. • Website written in Umbraco using MS SQL Express on IIS was created. • Backup system was configured.Results: A functioning platform for employee training and sales department operations was up and running.Project: Participation in the development of the MST framework master-toolkit.com as a Linux System AdministratorDuration: 3 yearsTechnologies Used: Ubuntu, CentOS, UnityContribution: • The framework was deployed on Linux systems. • Framework launching as a service using systemd was configured. • Framework updating using Bash/powershell scripts was programmed. • Load testing. • An article and Linux launching instructions for the framework were created.Results: MST framework is operational on Linux platforms.Project: Creation of virtual machines for ERP 1C as an Azure System Administrator Duration: 180 daysTechnologies Used: VHDX for Windows, ERP 1C:BP, MS SQLEXPRESS, AzureContribution: • Created a VHDX virtual disk with a Windows Server image and configured 1C Server and MS SQLExpress. • Created PowerShell scripts for quick deployment (and folding) of virtual images via Azure CLI.Results: Management of multiple 1C databases remotely using Azure was established.