Experience

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  Antonov airlines

  Apr 1985 - Apr 1993

  Application & systems programmer

  Programming support in CAD Dept. Major projects: aerodynamic profiles library, custom IDE for development in VAX/VMS environment, custom FEM package with its own definition language, pen-plotter optimizer, graphics libraries, etc. Took part in development of Antonov 124 Ruslan. IBM360, MS-DOS, VAX/VMS, IBM/PC - C, PL/1, FORTRAN, Ada, Pascal, Basic

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  Matra datavision inc

  May 1992 - May 1994

  Area manager for ukraine
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  Fantom technologies inc

  May 1996 - Aug 1999

  Engineer/system administrator

  System administration/ integration in heterogeneous environment (Irix/NT/95). HTTP/NFS/FTP/DNS/POP/SMTP/Proxies/DNS. Engineering Intranet Web Site (Perl/Apache/CGI/HTML). Controlled external access for suppliers, automated mailers/subscription managers, VRML parts/assemblies viewing, distributed publishing, etc. Software installation, upgrades, backups, performance tuning.

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  Mpl communications inc

  Feb 2001 - Aug 2012

  Software engineer

  Perl/MySQL. Application programming for financial web site Adviceforinvestors.com. Linux/Perl/DBI/MySQL/Apache/ EmbPerl, various CPAN Modules. Portfolio email system, Advertising system, Log Parser, French Pages, Portfolio Analysis section, Company ratings, Charts, Billing, System Monitoring, Model portfolios, Caching Quote Server, Mutual Funds Section. Some system administration (Debian, 5 servers)

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  Powerloc technologies

  Apr 2001 - Jul 2003

  Architect/lamp

  Built from ground up commercial website for this GPS company. Linux/MySQL/Perl/EmbPerl. Main site, administrative section, team section, shopping cart integration, DB design/setup, System admin Ticket based pricing system for shopping cart.

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  Portfolios.com

  May 2001 - Oct 2003

  Senior software engineer

  Primary responsibility - Portfolios.com and related domains / applications. Site redesign and optimization, evaluation and installation of clustering software (LVS) using remote DB server(pg) + 2 real servers + balancer. New site architecture with services distributed between several servers. Selection and installation of development tools. Apache optimization. MySQL db/tables. Newsletter project. Email marketing campaign project.

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  University of toronto innovation center

  Dec 2006 - Aug 2008

  Software developer

  Training kiosk project and associated website. Site for on-line training. Assessed business problem, defined system requirements, and provided external system design. Based on Apache/Perl/MySQL and EmbPerl, this solution provides training courses and tests in simple to understand and easily accessible form. All modules written in OO Perl. CVS and Bugzilla were used for revision control and bug tracking.

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  Investment reporter

  May 2008 - Mar 2009

  Architect, investmentreporter.com

  6m contract. Provided overall design and managed technical side of integration with adviceforinvestors.com (stock portfolio, research, quotes). Developed user authentication system using encrypted ids and XML exchange for user records. New quote module, new company information module. CVS used for revision control. MVC, Embperl in mod_perl environment. MySQL 5, Debian

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  Flightnetwork.com

  Sept 2008 - Oct 2009

  Senior software development engineer

  Was leading the effort developing framework for next generation of high traffic flagship product. DB layout, set of base OO classes (DB,User,Geo,Session), infrastructure modules based on Moose. New search engine API. Templating system selection (Mason). Apache2/mod_perl2 configuration high performance setup using intensive caching. PostgreSQL advanced feature set (roles,base tables etc..). Set of GEO modules to access data for world cities/airports/hotels. SVN/Basecamp/git

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  Stoney creek medical

  Jun 2013 - now

  Cto

  https://ourclinic.caImplemented secure and fully customizable web based EMR system for walk-in clinic environment. Ruby/rails, Postgres on Apache/Debian. AWS for cloud storage. Bootstrap. Secure sessions. Multiple user category dependent site layouts. Pdf document generation on the fly. OHIP billing/reconciliation. Mobile versions. Speech to text for doctor’s notes. Management pages for medications/vaccines/billing codes/diagnoses/doctors/patients. Currently 70000 patients, 500000 visits. 15000 lines of code. Github repository: https://github.com/DimitriOstapenko/emr Show less

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  Asia premier development ltd

  Sept 2018 - now

  Product development manager

  Developed from scratch Order Management System to handle pre-orders of car models by clients from around the world. RoR/Postgres. Apache/Debian. System supports 5 user roles and handles online ordering using shopping cart, inventory, shipping, reports in PDF/CSV, site administration functions and sanity checks. Event triggered emails. Site is now in production. Deployed on 2 servers with failover capability, overnight backups etc