- Customer Support: Handled escalated support requests via JIRA issues; ensured that customer problems were resolved within proper timelines and to the satisfaction of customers. - Deployed, configured and maintained virtual devices in IBM cloud- Configured, upgraded and maintained Brocade Vyatta 5400 firewall : IPsec site-to-site VPN tunnels, firewall rules, NAT rules, virtual interfaces for VRRP, stateful failover, virtual interfaces (VIF)- Nagios client/server, NRPE, NDOUtils and pnp4nagios installation and configuration- Configured tomcat 7/8 to run HTTPS with SSL certificates- Imported SSL certificates to Java keystore- Configured iSCSI initiator and multipath on RHEL 7 to connect to remote LUNs - RedHat 6/7 Linux system administration: firewalld, System D, cifs, ntpd, ISCSI, LVM, static routes, etc.- Oracle (11G & 12C SE) DBA: troubleshoot oracle server and database issues; add tablespace data files; export/import database; - Automated GUI testing via Selenium with Java- Installed and configured Atlassian Jira- Migrated SharePoint files to Confluence with Python script and Atlassian Confluence CLI - Migrated Altassian Confluence, Stash and Jira server- Developed, tested and maintained Bash and Python scripts to automate backup, configuration operations, and so on- Developed, maintained and executed test cases in Xray (Jira addon) for commercial web applications

- Azure AD and on-premises AD integration with Azure AD Connect and AD FS- VMware Data Protection (6.0) set up and configuration- Installed and configured PBIS on Ubuntu to join Ubuntu hosts to Windows AD - Migrated OpenStack instances to VMware 6.0- Configured Stunnel4 on Ubuntu to enable SSL on top of proxy service, Squid

• Built a vSphere virtual data center including web server VMs, an HA cluster backed by vSAN and iSCSI SAN, standard and distributed switches with vm and VMkernel port groups• Encrypted communications between servers using self-signed certificates• Installed and configured a virtualized Windows/Linux network consisting of centralized user authentication, routing and switching infrastructure, iSCSI SAN and SMB-supported NAS storage back-ends• Implemented and automated the installation and configuration of a complete open source messaging solution including DNS, DHCP and SMTP services• Configured a VoIP solution including a central PBX system, secure wireless network and Windows, Linux, Android phone clients• Deployed web server EC2-VPC instances within Amazon Web Services environment and managed server configuration with Puppet

- Prepared software build and release environment for multiple clients- Performed regular software builds and resolve build issues - Developed tools that automate client-side patching and internal source code merging- Designed, developed and unit tested SQL stored procedures to implement critical and complex business rules using MS-SQL, XML, XML schema, and XSLT- Performance-tuned SQL stored procedures

- collaborated with teammates in planning, designing, developing, testing, and maintaining business applications - fixed and unit tested application issues in accordance with established standards- prepared estimates and work plans- analyzed and resolved technical and application problems- adhered to high-quality development principles while delivering solutions on-time and on-budget

- Provided both in-house and on-site software consulting services to clients of finance and energy industry, including StraightThrough, Ontario Power Generation, E*Trade Canada, Barclays Global Investors, Halcyon Monitoring Solutions and Sun Microsystems- Contributed software engineering expertise in the development of products through the software lifecycle, from requirements definition through successful deployment- Participated meeting with business analysts and clients to finalize user requirements, resolve business systems issues and meet client needs- Designed and developed database tables and SQL stored procedures to implement critical and complex business rules of portfolio management software- Performance-tuned SQL stored procedures- Managed build and release environment for multiple clients of StraightThrough Express- Planed and scheduled various types of testing procedures such as regression testing and validation testing before each release of StraightThrough Express- Improved and defined QA procedures to improve the overall productivity of StraightThrough Express project- Developed mission critical application for Darlington Surveillance System, which fetches nuclear station plant data and presents the data to performance engineers in graphical format- Wrote technical documents according to established guidelines such as "IEEE Guide to Software Design Descriptions"​ - Developed and designed presentation layer of "Investment Management System" for Barclays Global Investors to facilitate data entry, processing and reporting of a wide range of financial instruments- Developed web pages using HTML, CGI, Java Script and Perl for E*Trade Canada