Denys Hrybkov, Infrastructure Engineer and Developer in Limassol, Cyprus
Denys Hrybkov

Infrastructure Engineer and Developer in Limassol, Cyprus

Member since April 12, 2018
Denys is a highly experienced, self-motivated infrastructure engineer, DevOps methodology enthusiast, and system administrator. Denys is passionate about working with amazing teams to create successful products and services including robust fault-tolerant architectures. Denys believes any issue can be resolved if one works hard enough. Besides Denys' expertise with MySQL, Ansible, and Nginx, it's his get-it-done attitude and enthusiasm for his work that makes his projects successful.
Denys is now available for hire

Portfolio

  • IMHIO, Ltd.
    Security, Scripting, Problem Solving, Management, Infrastructure, Ansible...
  • SmartClick, Ltd.
    Linux, PHP 5, AWS S3, Networking, Ansible, SaltStack, MySQL, Memcached...
  • Technoweb, Ltd.
    Linux, FreeBSD, Apache, Nginx, PHP 5, PHP-FPM, MySQL, Memcached, Redis, KVS...

Experience

  • Linux 13 years
  • Software & Hardware Maintenance 12 years
  • Infrastructure 10 years
  • Nginx 10 years
  • CI/CD Pipelines 6 years
  • Ansible 5 years
  • PostgreSQL 4 years
  • Terraform 3 years

Location

Limassol, Cyprus

Availability

Part-time

Preferred Environment

Linux, Bash, SSH, Slack, Ansible, Terraform, Cloud, Servers, Web Servers

The most amazing...

...thing I've developed for a client was their fault-tolerant infrastructure that served more than 5 million users per day.

Employment

  • Lead Infrastructure Engineer

    2016 - PRESENT
    IMHIO, Ltd.
    • Led a team in the build of a geographically distributed hybrid infrastructure on top of bare-metal servers and cloud tech.
    • Transformed the above-mentioned infrastructure from the cloud, added continuous delivery/deployment and monitoring, and implemented automated deployment using Terraform/Ansible.
    • Created fault-tolerant 200TB video storage; also configured adaptive streaming based on HLS/DASH technologies.
    • Developed a horizontally scaled cluster for PHP/Sphinx-based search engine. The cluster served more than 5 million unique users per month.
    Technologies: Security, Scripting, Problem Solving, Management, Infrastructure, Ansible, Terraform, Linux, Docker, Docker Compose, Technical Support, Nginx, Apache2, PHP-FPM, PHP 7, Software & Hardware Maintenance, CI/CD Pipelines, Postfix, Dovecot, SSL Configurations, Certbot, AWS Route 53, PostgreSQL, Iptables, OpenVPN, Sphinx Search Engine, Redis, RAID, Cloudflare, ClickHouse, OVH, Amazon Web Services (AWS), AWS, HAProxy, MongoDB, Elasticsearch, Microservices, Prometheus, SSL Certificates, Load Balancers, Database Replication, Distributed Replicated Block Device (DRBD), Database Backups, Consul, MySQL, Grafana, Apache, FFmpeg, Monitoring, NFS, IPMI, Exim4, IT Security, Node.js, Memcached, Regex, AWS EC2, Failover Solutions, Clustering, Web Servers, Cloud, DevOps, Shell Scripting, Google Cloud Platform (GCP), GoCD, Git, GitLab, GitLab CI/CD, Continuous Delivery (CD), Continuous Integration (CI), Continuous Deployment, Server Infrastructure, Cloud Infrastructure, Hybrid Cloud Infrastructure, Site Reliability Engineering (SRE), Bash, Bash Script, GitHub, Selenium, Datadog, Kubernetes, LEMP, PHP, Oracle Linux, CentOS, MariaDB
  • Senior System Administrator

    2013 - 2016
    SmartClick, Ltd.
    • Built website infrastructures based on the Kernel Video Sharing CMS engine.
    • Created a distributed and fault-tolerant infrastructure for Sphinx/PHP-based search engine application from scratch.
    • Managed the setup of the technical support workflow based on the Request Tracker tool.
    Technologies: Linux, PHP 5, AWS S3, Networking, Ansible, SaltStack, MySQL, Memcached, Sphinx Search Engine, KVS, WordPress, Joomla, Nginx, Apache, Load Balancers, Content Delivery Networks (CDN), Video Streaming, FFmpeg, PHP-FPM, Regex, FreeBSD, AWS EC2, Monitoring, Software & Hardware Maintenance, Infrastructure, Problem Solving, AWS Route 53, Iptables, OpenVPN, Redis, RAID, AWS, Amazon Web Services (AWS), ClickHouse, HAProxy, MongoDB, RPM Packaging, Certbot, SSL Certificates, Database Replication, Distributed Replicated Block Device (DRBD), Database Backups, NFS, IPMI, Docker, Apache2, IT Security, SSL Configurations, Failover Solutions, Clustering, Web Servers, Cloud, Scripting, Shell Scripting, Git, Management, Bash, Bash Script, LEMP, PHP, CentOS, Oracle Linux, MariaDB
  • System Support Engineer

    2011 - 2013
    Technoweb, Ltd.
    • Configured and supported dozens of servers and hundreds of HTTP services for the company's customers.
    • Configured and supported Dell servers remotely through IPMI.
    • Contributed to software compilation from sources on FreeBSD and Linux operating systems.
    Technologies: Linux, FreeBSD, Apache, Nginx, PHP 5, PHP-FPM, MySQL, Memcached, Redis, KVS, Nagios, Windows Server 2003, NFS, Technical Support, RAID, Networking, IPMI, Software & Hardware Maintenance, Problem Solving, Iptables, Database Backups, Monitoring, IT Security, Web Servers, Servers, Scripting, Shell Scripting, Server Infrastructure, Bash, Bash Script, LEMP, PHP, CentOS
  • System and Network Administrator

    2009 - 2011
    Atlant-OPT, Ltd.
    • Replaced an old FreeBSD-based network gateway to modern Linux.
    • Provided technical support for more than 100 company employees.
    • Developed a company network infrastructure from physical to application layer accordingly to the OSI model.
    Technologies: Windows, Linux, FreeBSD, Postfix, Dovecot, MySQL, Apache, Nginx, Nagios, Software & Hardware Maintenance, PostgreSQL, Enterprise, Microsoft SQL Server, Windows Mobile, Antivirus Software, Point-to-Point Tunneling Protocol (PPTP), Technical Support, IT Security, Azure Active Directory, Samba, DNS Servers, Infrastructure, Problem Solving, Iptables, RAID, Database Backups, Windows Server 2003, Monitoring, IPMI, Server Maintenance, Cabling, Web Servers, Servers, Scripting, Shell Scripting, Management, Bash, Bash Script, Ubuntu Linux, Debian
  • System Administrator

    2008 - 2009
    IT-Apex, Ltd.
    • Discovered the root cause of an issue and fixed a major network outage.
    • Detected a worm known as Conficker on several Windows computers; then created and applied a recovery plan.
    • Fixed all issues with the company network gateway based on Windows.
    Technologies: Linux, Windows, Networking, Antivirus Software, Azure Active Directory, Technical Support, MySQL, MSSQLCE, Point-to-Point Tunneling Protocol (PPTP), RRAS, Bash Script, Exim4, Dovecot, Server Maintenance, Terminal Servers, Infrastructure, Problem Solving, Windows Server 2003, Microsoft SQL Server, IT Security, Samba, Cabling, Servers, Management, Server Infrastructure, CentOS, Ubuntu Linux
  • Junior System Engineer

    2006 - 2008
    PolyPlast, Ltd.
    • Setup the hardware and helped with Linux-based software configuration for the video surveillance system.
    • Contributed to the structured cable system development for the entire office local area network.
    • Maintained the office hardware and provided technical support for company employees.
    Technologies: Linux, Windows, Terminal Servers, Technical Support, Software & Hardware Maintenance, Video Surveillance, Cabling, Windows Server 2003, Server Maintenance, Servers, Ubuntu Linux, Debian

Experience

  • Content Aggregation Platform

    A distributed content aggregation platform.

    I was the infrastructure, DevOps, and SRE engineer on this project, and I helped develop the project from scratch. I actively cooperated with developers to deploy Go/Node.js-based services, automate deployments, and create the secure and fault-tolerant infrastructure.

  • Continuous Delivery Platform

    A CI/CD software delivery platform.

    As a system architect, I developed a custom CI/CD platform from top to toe. It was based on GoCD software and provided the ability to test, build code of Go/Node.js -based services, package RPM, and spread across geographically distributed clusters.

  • Video-on-demand Platform

    Project: A custom video-on-demand platform

    My responsibilities were to develop a highly available distributed infrastructure for conversion, storage, and delivery of video content. A solution provides the ability to perform continuous video conversion and store any amount of data in fault-tolerant storage. The video content was delivered using adaptive streaming technologies with an own developed video player.

Skills

  • Languages

    PHP, Bash, Bash Script, PHP 7, PHP 5, Regex, Go
  • Tools

    Ansible, Nginx, Docker Compose, Terraform, Graylog, Grafana, Certbot, Apache, Nagios, GitHub, SaltStack, PHP-FPM, Postfix, Exim4, Distributed Replicated Block Device (DRBD), Git, GitLab, GitLab CI/CD
  • Paradigms

    DevOps, Continuous Delivery (CD), Continuous Deployment, Management, Microservices, Samba, Continuous Integration (CI)
  • Platforms

    Linux, Docker, LEMP, Windows, FreeBSD, DigitalOcean, Windows Server 2003, AWS EC2, WordPress, Apache2, Windows Mobile, Amazon Web Services (AWS), Google Cloud Platform (GCP), Kaltura, Kubernetes, Red Hat Linux, CentOS, Oracle Linux, Ubuntu Linux, Debian
  • Storage

    MySQL, MariaDB, PostgreSQL, OVH, Redis, Memcached, Database Replication, Database Backups, AWS S3, ClickHouse, Elasticsearch, MongoDB, ScyllaDB, Microsoft SQL Server, Azure Active Directory, Datadog
  • Other

    Infrastructure, Software & Hardware Maintenance, Servers, Web Servers, GoCD, Server Infrastructure, Problem Solving, AWS Route 53, CI/CD Pipelines, Content Delivery Networks (CDN), HAProxy, RAID, Cloudflare, SSL Certificates, Load Balancers, Networking, KVS, Monitoring, NFS, IPMI, Shell Scripting, Scripting, Cloud Infrastructure, Hybrid Cloud Infrastructure, Site Reliability Engineering (SRE), Consul, AWS, Video Streaming, SSH, Cloud, Bare-metal Environment, RPM Packaging, Prometheus, Failover Solutions, Clustering, Technical Support, Dovecot, Antivirus Software, Point-to-Point Tunneling Protocol (PPTP), DNS Servers, RRAS, Server Maintenance, Terminal Servers, Video Surveillance, Cabling, SSL Configurations, Software QA, Storage, Videos, MP4, HTTP Live Streaming (HLS), MPEG-DASH, Video Players
  • Frameworks

    Selenium
  • Libraries/APIs

    Node.js, FFmpeg, Hls.js
  • Industry Expertise

    IT Security

Education

  • Master's Degree in Computer Engineering
    2002 - 2007
    Volodymyr Dahl East Ukrainian National University - Severodonetsk, Ukraine

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