Roman Grossi

SRE/DevOps, Full-Stack developer

  • Email: i@tobishua.com
  • Now in: Georgia, Tbilisi
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Work experience

Blockchain company (Hidden due to NDA)

September 2019 - Present
Role: DevOps Engineer

Big blockchain company with strict availability and fault tolerance requirements.

  • Installation and configuration of servers and software for highload & high availability platform;
  • Monitoring of equipment and services (Grafana, Prometheus, Alertmanager, Zabbix);
    • I wrote Ansible roles for Grafana, Alertmanager, Webhook;
  • Ansible with dozens of roles;
  • Network things (Cisco)
  • CI/CD for fault tolerance/zero downtime platform;
    • I wrote a lot of gitlab-ci files;
    • I optimized building process for Go-applications;

Umbrellio

May 2018 - August 2019
Role: Site Reliability Engineer

Fintech.

  • Installation and configuration of servers and software;
  • Monitoring of equipment and services (Grafana + InfluxDB + Telegraf, Nagios);
  • Setting up tools for monitoring;
    • I deployed grafana;
  • 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 for autorun Ansible playbooks;
  • ELK stack and Graylog
    • I deployed ELK + Graylog and configure it for highload system;
  • PostgreSQL like a master;
  • Nginx like a ninja;
    • I oprimized Nginx for high-availability system and fix some problems with logs in files
  • CentOS like a boss :)

Playkot

August 2017 - May 2018
Role: Ops Engineer

Playkot is a Russian game studio which makes games for social networks and mobile devices.

  • 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.

Selectel

February 2017 - August 2017
Role: System administrator

The largest Russian IaaS-provider.

Services: colocation, dedicated servers, cloud storage, virtual private cloud, content delivery network, etc.

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

Question: Why did you work here after such a long break?
Answer: I quit to go on a round-the-world trip, and when I returned, I was called back.

Selectel

January 2015 - October 2016
Role: Datacenter Systems Engineer

Company description: See above!

  • 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 cut myself on the edge of the case and a drop of my blood hit the motherboard. Here is the link for the article in Selectel's blog about k-root node)

Improvy

Improvy is my own side work, which I developed for a long time in my free time.
During this time I developed several large projects:

FullyStat

Working
Role: DevOps Engineer, Full-stack developer (PHP, Python, MySQL, Redis, RabbitMQ, FastText)

FullyStat is an awesome Telegram bot for chats and users analytics and displays nice charts. My first international project, which is used by people in more than 10 countries.

  • More than 2 750 000 users;
  • More than 9000 chats in monitoring;
  • More than 150/rps (RX), 100/rps (TX);
  • Realtime message parsing (language, topic, communication mood, common info).

The MusicBot

Closed
Role: DevOps Engineer, Backend-developer (PHP, MySQL, Redis, Gearman)

The MusicBot is piracy! The bot can find and download any song for free.

  • More than 20,000 users;
  • More than 120,000 queries per day.

Unfortunately, the API service we used was closed, so I had to close the project.

FairTop

Closed
Role: DevOps Engineer, Full-Stack developer (PHP, Python, MySQL, Redis, RabbitMQ, jQuery and more)

My first serious project. FairTop is Minecraft's servers rating and useful tools for server's owners.

  • More than 1,000 game servers registerd;
  • More than 30,000 MAU;
  • Around 300,000 page views in month.

I decided to concentrate on the FullyStat, because it's more promising.

Small & Open-source projects

Ansible role for Nebula

Nebula is a scalable overlay networking tool with a focus on performance, simplicity and security (by Slack). And this ansible role for deploy nebula regular node and lighthouse node.

GitHub repository

Ansible role for Wireguard

Wireguard is an extremely simple yet fast and modern VPN that utilizes state-of-the-art cryptography. It aims to be faster, simpler, leaner, and more useful than IPsec, while avoiding the massive headache. And this ansible role for deploy wireguard for hosts in your inventory.

GitHub repository
2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

Student

Progress: I began to study HTML and CSS, the first rework of templates for sites.

Secondary special education student

Progress: Linux becomes my main operating system on my home computer.

Still student

Progress: Nothing new. I continue to study Linux, HTML and CSS

Yep. Student.

Progress: Made my first template for smarty-based website

Student & a technician in my school

Progress: Server use of Linux, I began to study nginx, PHP & MySQL. I launched my first project, which I programmed myself.

Freelancer

Progress: I began to study PHP templates system - twig. Study of Javascript and jQuery

Datacenter Systems Engineer in Selectel

Progress: Deep study of networks and network equipment, professional Linux study. Began using Git for Improvy's projects.

Datacenter Systems Engineer in Selectel & at the end of the year Freelancer

Progress: Began to study Python and Redis.

System administrator in Selectel -> Ops Engineer in Playkot

Progress: Began to study Docker and Libvirt.

Ops Engineer in Playkot -> Site Reliability Engineer in Umbrellio

Progress: I strengthen my knowledge in automatization & CI/CD.

Site Reliability Engineer in Umbrellio -> DevOps Engineer in Blockchain company

Progress: Work with highload projects in enterprise environment, virtualization, IT security and autodeploy bare-metal servers.

DevOps Engineer in Blockchain company

Progress: Work with highload fault tolerance platfom in enterprise environment, virtualization, IT security, autodeploy bare-metal servers, CI/CD with zero downtime.

HTML CSS Linux PHP MySQL Nginx Twig JavaScript jQuery Git Python Redis Docker Libvirt Ansible Terraform Nagios PostgreSQL ELK stack LDAP Graylog Firewalld DDoS protection PowerDNS Prometheus Alertmanager Vault Consul RabbitMQ CI/CD (zero downtime) Packer
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Travelling
I like travelling. And I try not to stay in one place for a long time.
Horseback Riding
Horses - amazing animals. Even though I rarely get to do it, but I love to ride.
Cooking
A tasty dish that I cooked myself - the best it can be!
Uke
My favorite musical instrument, which is everywhere with me.
Climbing
Climbing is something unusual and allows me to know my own limits.
Yoga
A healthy mind and a healthy body - the key to success.