e-mail: job@bratskyi.rocks
skype: dmitry.bratskiy
Core skills and abilities:
DevOps, Network administration, System administration, IT manager;
*nix, shell scripting, TCP/IP, high load web servers administration, CI/CD, etc...
Work experience:
October 2022 - July 2024 - DevOps in Micro Focus/OpenText company:
Maintenance of build processes of Dimensions CM, Pulse Uno and Version Manager;
Updating and recompiling third party applications (like ssl, curl, postgresql, etc... ) for *nix systems like AIX, Solaris, Linux;
Solving various issues appeared during working on new releases (like application crash inside docker or installshield components incorrect behavior);
March 2020 - September 2022 - DevOps in Tectransit company (USA remote job):
Administration of a few EC2 instances (nodejs, mongodb);
Adding new frontend and backend features using Javascript language;
June 2018 - March 2020 - DevOps in "Qumaron" company (Cyprus remote job):
Proxmox based with lxc containerization network build;
November 2016 - December 2017 - DevOps in "OnVoya" company (USA remote job):
Setup and maintenance of the new services;
Support of company network (mainly AWS);
Deployment of releases;
Some of the tasks completed under my management:
High load AWS based autoscalable cluster implemented (Ubuntu, Nodejs, PostgreSQL, Redis, Docker);
One more cluster implemented (Ignite, Tomcat, Mysql, Apache)
Some ansible and bash automation scripts written;
Multistage server implemented;
Jenkins installed and configured;
August 2015 - November 2016 - DevOps and System administrator in "Emarketing Concepts" company (USA remote job):
Sites transfers;
Backups management;
spam protection;
DNS management;
FreeBSD, TCP/IP, AWS, Xen administration.
Some of the tasks completed under my management:
More than 300 sites transferred manualy or with scripts;
Script for DNS zones backup from AWS made;
March 2014 - March 2016 - CTO of "Baltrobotics" Company (Poland):
Maintenance of accounts and orders for purchase of the equipment;
Administration of some servers Linux/FreeBSD/Windows and Cisco layer three switch.
Some of the tasks completed under my management:
Company got LIR status;
BGP session configured;
Some clients found.
July 2006 - March 2014 - CTO of "RBC-Ukraine" information agency (Ukraine):
Maintenance of accounts and orders for purchase of the equipment;
Administration of more than 20 high load unix servers (FreeBSD, Linux) and Cisco Catalyst;
Office maintenance.
Some of the tasks completed under my management:
Full 42" rack of company servers moved to new data center without services interruption (this significantly reduced expenses and improved robustness);
Office relocated to a new place;
Back-up Internet channel built;
Several web projects completed.
March 2003 - June 2006 - managing director of telecommunications of the bank "Financy i Kredit". (Ukraine)
Maintenance of accounts and orders for purchase of the equipment;
Administration of more than 20 Cisco routers and firewalls in Kiev and branches (3640, 17XX, 25XX, 26XX);
Administration of more than 20 Unix servers in Kiev and branches (mainly FreeBSD);
Administration of a great many TCP/IP services, VPN, database servers (Mysql), static and dynamic (OSPF, BGP) routing, Frame Relay, X.25;
Administration of PBX (Nortel, Siemens).
Some of the tasks completed under my management:
Internet expenses significantly reduced (given that it became several times quicker);
Improvements to the routing of the network made (this simplified its administration and increased robustness);
Several reserve channels at branches, which greatly improved robustness of the network build;
Negotiating with contractors, resulting reduction of the prices for their service held;
Anti-virus and anti-spam protection improved;
IP telephony implemented;
Visa and Master Card channels migrated to TCP/IP;
DMZ based upon Cisco Pix Firewall, which greatly increased security of the network made;
IPSec and QoS based on Cisco used.
January 2001 - March 2003 - network and system administrator of the largest in Ukraine retailer of the airline tickets - "KiyAvia". (Ukraine)
Administration of the large network of branches (more than 20 routers in Ukraine: Cisco 2511, 1601, Intel Express, Zyxel Prestige; Frame Relay, X.25, PPP);
Administration of more than ten servers (Linux, FreeBSD, Novell Netware, SCO Open Server);
Administration of the core TCP/IP services: DNS,VPN,DHCP,SMTP,HTTP,etc...;
Administration of the web-server with lots of virtual hosts, php, mysql;
Configuration of the static and dynamic (RIP) routing, firewall.
Some of the tasks completed under my management:
Found and eliminated the cause of instability of Cisco router under heavy load;
Several new branches were plugged into the corporation network;
Protection of the network and individual servers improved;
Anti-virus software on the mail server implemented;
Additional channel with new Internet provider (increased speed and improved robustness) made;
Some of the old scripts were updated to cope with revised tasks.
May 2000 - December 2001 - system administrator in the National Bank of Ukraine:
Administration of the cluster of two HP 9000 K-370 HP-UX 10.20 servers;
Administration of the NT domain (NT 4.0 server), approx. 20 users;
Administration of Cisco (3640): TCP/IP, FR, X.25, firewall;
Posix shell programming;
Mentoring of the junior members of the team.
Some of the tasks completed under my management:
Got own mail domain (before all the employees used one address);
Dynamic swap of the IP address between servers without participation of the clustering programs made(this allowed to plug ATMs and pos-terminals to the processing center);
Dedicated channels IP over FR and IP over X.25 with unlimited banks created;
Security protection of the individual servers improved;
Proxy and web-servers launched;
Lots of supporting scripts for the applications and system needs written.
Education:
March 2001 - attended 3 course on HP-UX;
1994 - 1999 Kiev International Univercity of Civil Aviation . Faculty of Automatic and Computers. Speciality - "Intellectual systems, complexes, networks". Qualification - networking engineer. Diploma: "Cryptographic system based upon RSA algorithm".
Publications:
Networks and Telecommunications, 3 (13) 2000. Article about web-browsers.