Open to opportunities

Denis Kot

@deniskot

Site Reliability Engineer and DevOps expert building secure, automated multi-cloud infrastructure with IaC, CI/CD, and monitoring.

Germany

Message

What I'm looking for

I’m looking to build secure, reliable multi-cloud platforms where I can drive IaC/CI/CD automation, strengthen observability, and improve incident response and cost control—while using AI tools to streamline operations end to end.

I’m an SRE/DevOps engineer with solid experience building and maintaining infrastructure on AWS, Azure and on-prem. I lead infrastructure transformations that improve security posture and optimize costs across multi-cloud setups, combining automation, IaC, CI/CD and monitoring to speed up daily operations and development workflows.

In my current role, I led a company-wide IaC transformation (3,980+ commits in 18 months) and designed Docker-based orchestration on AWS ECS. I also implemented VPN infrastructure with Twingate, reduced sandbox environment deployment time by 60%, improved incident resolution rate to 39.5%, and strengthened security through threat intelligence, vulnerability blocking, SSH Certificates and SSO integration.

Previously at Avira, I supported award-winning cloud architecture—migrating from physical servers to AWS EC2, scaling from 50 to 300+ servers with autoscaling, and moving workloads from EC2 to AWS ECS (Docker). I modernized deployments with CI/CD, centralized error tracking with Sentry, and built Rigel—an in-house LiteLLM replacement written in Rust—along with an innovative Dynamic Detonation system for high-security sandboxing.

Experience

Work history, roles, and key accomplishments

Current

Site Reliability Engineer

Current

Makersite

Sep 2024 - Present (1 year 7 months)

Led a company-wide IaC transformation with 3,980+ commits across 18 containers and achieved 5–8x typical senior engineer output. Reduced sandbox deployment time by 60%, improved incident resolution rate to 39.5%, and strengthened security with threat intelligence, vulnerability blocking, SSH certificates, and SSO integration.

Terraform Docker AWS ECS CI CD Prometheus Grafana Loki Ansible Sentry PagerDuty

Senior DevOps Engineer

Avira

May 2019 - Aug 2024 (5 years 3 months)

Migrated infrastructure from physical servers to AWS EC2 and scaled from 50 to 300+ servers using autoscaling; reduced autoscale time from 5 minutes to seconds by moving workloads to AWS ECS (Docker). Modernized monitoring (Shinken to Zabbix), introduced fully automated CI/CD pipelines, and architected an error tracking system with Sentry.

AWS EC2 AWS ECS Docker AutoScaling Zabbix CI CD Sentry

Lead DevOps Engineer

Monterosa

Apr 2013 - Sep 2015 (2 years 5 months)

Ensured high-availability performance for live interactive TV events and improved monitoring by migrating from Nagios to Zabbix, reducing manual interventions. Automated repetitive operations with Rundeck (50% reduction) and led the migration from Gitolite to GitLab to enhance developer collaboration.

High Availability Nagios Zabbix Rundeck Gitlab Gitolite Automation Incident Response

Technical Support Team Lead

FreedomOSS

Jan 2010 - Jan 2012 (2 years)

Built and managed a 24/7 support team (1 to 4 engineers) and implemented SSO and Zabbix monitoring to improve operational coverage. Added basic configuration management to standardize support tasks and responses.

Team Leadership SSO Zabbix Support Operations Configuration Management

Senior System Administrator

G2X/Navagate

Jan 2005 - Jan 2010 (5 years)

Managed infrastructure for 150+ users, including virtualization and network optimization to improve reliability and performance. Connected international offices via VPN and VoIP to support cross-site communications.

Virtualization VPN VoIP