I'm Roman. Digital entrepreneur, developer, founder and CEO at Improvy OÜ

Big blockchain company with strict availability and fault tolerance requirements.

Achievements:

• Increased platform reliability by improving SLO from 99.5% to 99.95% within six months;
• Reduced median incidents duration from 1 hour to 24 minutes;
• Lowered SEV-1 incidents from 14 to 3 per month, implementing root-cause analysis and systematic prevention processes;
• Reduced infrastructure cost by 19% within a year;
• Organized bi-weekly knowledge-sharing and architecture alignment sessions, improving collaboration and long-term planning across the department.

Key Responsibilities:

• Quarter roadmap planning with 75%+ of resolved tasks;
• Operational Excellence: Establish, optimize, and continuously refine engineering workflows, on-call processes, and incident-response practices;
• Leadership & Team Management: Oversee task allocation, performance development, conflict resolution, and mentoring across four infrastructure teams;
• Architectural Strategy: Design scalable, high-load, and high-availability solution architectures in collaboration with engineering leadership;
• Monitoring & Observability: Lead the architectural planning and implementation of end-to-end monitoring, alerting, and SRE-driven processes;
• Automation & Tooling: Drive automation initiatives by developing scripts, pipelines, and internal tools to eliminate manual operations and reduce engineering load;
• Cross-Functional Collaboration: Align the Infrastructure roadmap with product, development, and security teams to support business goals and platform evolution.

Tech Details:

• Distributed infrastructure across six locations
• 1000 dedicated servers
• 2 environments in AWS
• 46 services

• Installation and configuration of servers and software;
• Monitoring of equipment and services (Grafana + InfluxDB + Prometheus + Telegraf, Nagios);
• Setting up tools for monitoring;
  • I perform migration from Nagios and Grafana + InfluxDB + Telegram to Grafana + Prometheus;
• Optimize performance, troubleshoot problems, eliminate denial of service;
• Solving problems on security and scalability of systems;
• Ansible with six different roles for servers configuration;
• Gitlab CI for deploy nginx and firewall configs;
  • I wrote Gitlab CI pipelines to run Ansible playbooks;
• ELK stack and Graylog
  • I deployed ELK + Graylog and configure it for highload system;
• PostgreSQL optimization and maintenance;
• I optimized Nginx for high-availability system and fixed problems with logs in files for highload system;

• AWS & Terraform;
• Technical consultation of the company's employees;
• Making office IT better;
• Maintenance of game servers;
• TeamCity, Jira, Confluence, GitLab, etc. - install and configure;
• PPTP, L2TP servers;
• Grafana + Prometheus - install and configure.

• Technical consultation of the company's customers;
• Linux administration for the company's customers;
• Juniper and other network equipment administration;
• Network and infrastructure monitoring.

• Monitoring of servers, network equipment and air-conditioning system (1 server room, 211 racks, ~6000 servers, ~500 units of networking equipment);
• Switching and laying optical and copper networks;
• Servers maintenance (Dell, IBM, Supermicro, etc.);
• In addition to the main work, I made front-end for the corporate time tracker system.
• I sprinkled my blood on the k-root dns (It's not a joke, I really accidentally cut the finger on the edge of the case and a drop of my blood hit the motherboard (this incident did not affect the server's functionality).