Rifat Rahman

Experience

• 

  Integrated Business Systems and Solutions Pvt. Ltd.

  Sept 2011 - Apr 2013

  Programmer

  Linux / Unix programming along with network programming. Writing various programs for servers basically.

• 

  Code Testing Labs Ltd

  May 2013 - Mar 2014

  -- Managing VoIP servers (asterisk, kamailio, freeswitch)-- writing programs in C for servers-- Leading a team for sophisticated design and analysis-- Working with server virtualization using KVM.-- R&D on OpenStack -- Leading the project of the Linux Kernel Module development for encryption, padding and ptime modification of RTP traffic and encryption for the SIP traffic.-- Deployment of the module on production servers.-- Kernel tuning and optimization testing, for real time workloads.-- Study on the Linux Networking Stack

  • System Administrator

    Sept 2013 - Mar 2014

  • Programmer

    May 2013 - Aug 2013
• 

  Hard Won International Technologies Pvt. Ltd.

  Jun 2014 - Feb 2015

  LInux System Administrator

  Administrating Linux Servers, System Provisioning, Designing and Performance Tuning, Automation, Development in Python

• 

  IPvision Canada Inc

  Mar 2015 - Dec 2017

  Senior System Analyst

  -- Team Lead, DevOps.-- Lead the OpenStack private cloud deployment project.-- Administration and maintenance RingID servers.-- Designing labs for different teams working on distributed systems, virtualized with Ovirt & KVM, and also inside OpenStack.-- Production Server Virtualization using KVM.-- Deployment of large scale storage technologies (GlusterFS, Ceph, OpenStack Swift).-- System Deployment with Cobbler, Foreman, Spacewalk & Katello.-- Server Orchestration using Ansible.-- Production Database Migration from MySQL NDB to MariaDB Galera Cluster.-- Writing python scripts for infrastructure information gathering and monitoring with specific use cases.-- Server performance analysis and tuning.-- Deployment assistance for Apache Cassandra and Solr production environment, assisting the Big Data team.-- Apache Hadoop and Apache Solr Deployment for analyzing the infrastructure, assisting the ETL Team.-- Leading the R&D of expansion of the cloud infrastructure, SDN Controllers and Docker based infrastructure (both inside and outside the scope of OpenStack and OpenShift).-- Lead the Network Operations Team & Network Monitoring Team.-- Arranged Single Sign On inside the infrastructure and development utilities (like GitLab, RedMine etc. and of course, OpenStack Keystone) using FreeIPA.-- Providing High Availability (using Pacemaker) and Load Balancing solutions (using HAProxy & Keepalived) in the infrastructure.-- Leading the R&D on RDBMS (MariaDB and PostgreSQL) performance enhancement, architecture design, replication design etc.-- Testing and bootstraping the R&D clusters for various environments, like NOSQL clusters (Hadoop, Solr, Spark, Cassandra, ScyllaDB, Kudu etc.), RDBMS clusters (MySQL, MariaDB and PostgreSQL), RabbitMQ Clusters, Redis Clusters etc.-- Working closely with the ETL team regarding data processing pipeline.-- Guiding the infrastructure design, specifically network logical architecture design for RingID servers, and deployment. Show less

• 

  Tirzok Private Limited

  Jan 2018 - now

  Infrastructure Architect & CEO