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Patterns of SaaS: refactoring databases

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Andrzej G.


Patterns of SaaS: refactoring databases, or how to apply 650,000 changes in a few hours without losing any sleep

Summary: In this talk we will discuss general database refactoring patterns, database multi-tenancy models as well as techniques that are used to apply 100s of changes to live databases with 0 downtime for the application.

First Speaker: Leonid Igolnik

Leonid Igolnik is a self proclaimed a unix bigot and a java evangelist. In his current role as a Vice President of Product Development with Oracle he is responsible for product development of several SaaS application. He has spend his entire professional career building on-line applications starting his career at one of the earliest internet service providers in Israel. Leonid first started building large scale applications in Java in 2002 while working for the 2nd largest domain registrar at the time at Tucows/OpenSRS where he led the platform team. Subsequently to that he held several technology leadership roles with companies in Canada and US. Most recently Leonid has been responsible for engineering teams at Taleo (acquired by Oracle) building applications that help millions of people find jobs that have propelled the company to a position of one of the 4 largest SaaS companies in the world.

Second Speaker: Marcin Burlinski

Martin Burlinski is a seasoned veteran of J2EE development. In his 13+ yeas of experience he had an opportunity to work for various startups in a good old .com era with crazy names like (, as well as somewhat larger companies with brand names like IBM and Tucows/OpenSRS. After spending a considerable amount of time abroad in Canada and US he has recently came back to Poland and is leading the development of SaaS Enterprise Recruiting applications within Oracle company.

Bora-Komorowskiego 25 · Kraków