Sergei Chukh

Freelancer

DevOps Engineer / SRE / Developer

• Built Kubernetes infrastructure on GKE and Hetzner (Talos) for reproducible, reliable deployments
• Automated infrastructure with Pulumi and Helm to reduce configuration errors and simplify updates
• Improved platform resilience by isolating unstable external APIs and adding retry/backoff mechanisms
• Stack: GCP (GKE), Talos, web3.js, VictoriaMetrics, Typescript, Nodejs, Pulumi, Hetzner, Github

AMarkets

DevOps Engineer / SRE

• Diagnosed and resolved complex database and application performance issues in production (PostgreSQL, MySQL, Redis)
• Introduced PostgreSQL query audit tools to identify missing indexes and query anti-patterns
• Partnered with Go engineers on MetaTrader 5 services to improve reliability and reduce costs
• Designed service interaction patterns and rollout strategies for a monolith-to-Kubernetes migration (Deckhouse platform)
• Reduced MTTR by proactively diagnosing backend slowdowns and validating fixes before they impacted end-users
• Stack: AWS, Ansible, kubernetes, k8s (deckhouse), helm, werf, Golang, Metatrader 5, Pulumi, PostgreSQL, Sentry, Gitlab, MySQL, Redis, Prometheus stack, RabbitMQ

Gaijin Entertainment

DevOps Engineer / SRE

• Ensured uptime of high-load game backends by quickly troubleshooting critical incidents, and participated in a 24/7 on-call rotation
• Built a custom service discovery mechanism using native etcd features
• Focused on uptime and rapid recovery in high-load multiplayer environments with live player traffic
• Stack: Linux (CentOS 7), Redis, AWS (RDS, EC2, VPC, Route53), Graphite + Telegraf, Kubernetes on bare metal, Docker as build environment, Golang, Puppet, Ansible, Terraform, Jenkins, Gerrit

Yandex

Support L2 Specialist

• Troubleshot issues in Yandex Cloud services (Managed DB, Compute, Kubernetes)
• Specialized in deep-dive incident analysis and resolution in production Kubernetes clusters under pressure

Rostelecom IT

DevOps Engineer / SRE

• Updated, configured, and troubleshot the Wink API services in production
• Set up monitoring for servers and services (Zabbix, Prometheus, VictoriaMetrics); participated in on-call duty and responded to incidents
• Administered PostgreSQL databases (backups, replication, performance tuning)
• Supported the product team by providing internal tools as a service to streamline development and releases
• Handled additional duties: trained the 24/7 operations staff on the new platform, coordinated with business analysts, and planned hardware procurements for the project
• Systematically eliminated SPOFs and improved service recoverability across critical TV infrastructure
• Stack: Linux (Centos 7), PostgreSQL (+Pgbouncer), NSQ, ClickHouse, Nginx, Reindexer (https://github.com/Restream/reindexer), Prometheus Stack (+Victoria Metrics), Opscode Chef, Gitlab, Golang

Equilibrium

DevOps Engineer

• Maintained public blockchain nodes (Parity for ETH, nodeos for EOS)
• Reinforced infrastructure against edge-case failures in blockchain node deployments and CI pipelines
• Stack: Linux (Ubuntu), AWS (RDS, EC2, VPC, Route53), Docker swarm, Prometheus Stack, HashiCorp Vault, Teamcity

Restream

Technical Support Engineer

• Processed requests in the Jira ticketing system
• Performed initial OS provisioning (CentOS) on servers and managed configuration inventory via IaC (Puppet)
• Enabled faster node recovery by refining monitoring thresholds and improving root cause detection

UGTU

2009-09-01 - 2014-05-01