Denys Berestyuk Email & Phone Number

Toronto, On, Ca

Toronto, Ontario, Canada

Toronto, Canada Area

Strategy, patterns, etc.

Toronto, Canada Area

Responsible for building TD's Big Data platform on top of Hadoop (CDH5) and other Hadoop Ecosystem Technologies like Hive, HBase, Solr Search; as an independent consultant through CAPCO.

Making progress in the area of using Big Data technologies for real-time analytics, online machine learning and using online behavior to determine sales readiness and lead quality. The insights are intended to help Sales and Marketing teams with optimal decision making to increase client base and revenues.Since 2011, we are using Hadoop on Amazon AWS, to analyze raw Web traffic data from all OANDA's global websites to fully understand multi-touch channel relevance in the customer journey to registration. This analysis not only helps Marketing team identify channels that bring in most registrations, but also helps understand the quality of acquired clients after combining online with offline data.Focusing on - Predictive Analytics - High Value Client, Churn, Conversion Prediction Models- Multi-touch Marketing Spend Attribution - In house U-Shape model that takes non-web data into account- Behavior Analytics - Using online behavior for Lead Scoring, Churn detection, etc.- Upgrading to Hadoop 2.2 + Impala for data processing

Toronto, Canada Area

Senior member of the Business Intelligence Team responsible for architecting and developing key pieces of the analytics platform from the ground up: ETL, data modeling, data warehousing, KPI analysis tools, and reporting portal.A summary of projects and accomplishments:- The second person to join Business Analytics team at OANDA, I helped build nearly every project currently in production. Introduced build and testing processes as well as started, maintained and optimsed common code that was being reused across all projects. Promoted best OO programming practices and techniques.- Participated in developing in-house marketing analytics stack, which rivals in features to Omniture and IBM's Coremetrics, that provided insight into campaign performance (ROI, CPL, CTR, etc) of a multimillion-dollar marketing spent across numerous marketing channels. Cross-domain tracking, first/last/weighted click/view off-site attribution, registration funnel metrics, automated email marketing and joining web-data with transactional data at an individual level. Use of Infrastructure as a Service and big-data frameworks (Amazon EMR - Hadoop + Hive +S3).- Solved complex problems of determining profit at transacational level for thousands of clients in near real-time.- Helped build Business Analytics Portal for visualizing business insights for senior executives, managers, traders, customer service representatives using dashboards reports and charts.- Implemented compliance reporting projects for NFA and MAS that required flawless accuracy and deep understanding of OANDA's transactional system.- In the process of learing Predictive Analytics (machine learning algorithms) aimed at predicting client account activation, funding and trading activities and wealthy client identification, retention and client value.Technologies:Java, Spring, OLAP, Data Warehouse, MySQL, DB2, Hadoop, Hive, MapReduce, GIT, Tomcat, BIRT, HighCharts, Groovy, Python, many more

Worked in an agile development environment to plan, develop and test multiple enterprise level projects which expose functionality through web-services. Evaluated technologies for new projects and benchmarked services of other companies for possible partnerships. Implemented automated integration-test frameworks, wrote test cases and created API documents.Technologies: Java, J2EE, SOA, Spring Framework, Hibernate, MySQL, Enunciate, REST, Spring-WS, Axis2, SOAP, Mule, ActiveMQ, Maven, Tomcat, Resin, Geronimo, Subversion (SVN), XML, JUnit, DBUnit, JMock, SoapUI, CentOS, RedHat, Agile Development (XP), Eclipse, SDLC

Collaborated in a 12 person team to add new functionality based on business requirements for an enterprise level WebSphere Commerce application. Promoted the practice of Unit Testing and encouraged good programming practices during code reviews.Technologies:Java/J2EE, Rational Application Developer, WebSphere Commerce, Eclipse, Object-Oriented Design Patterns, Struts Framework, JUnit, CVS, JSP, CSS, HTML, JavaScript, DB2, SQL, XML, UML, Web Services (WS), WSDL, SOAP

Determined test strategies and produced test cases based on business requirements. Executed test cases, raised defects and tracked results as part of FVT cycle. Led the team in developing custom Java based Automation Test Framework by extending features of Rational Functional Tester, and eventually submitted a Patent Disclosure for framework design & implementation. Developed and executed automated test cases and reported results to Test Manager. Mentored team members on how to develop well designed and maintainable automated tests.Technologies:Lotus Test Case Database, Rational Application Developer, Java, CMVC, ClearCase, Defect Tracking, JSP, HTML, JavaScript, DB2, SQL, XML, UML, MQ, Windows XP, AIX / Linux, Shell Scripting, Microsoft Office Applications

• Collaborated with clients to establish system requirements• Designed and implemented two end-to-end unique support and control software projects for experimental setups using Visual Basic .NET in a 3-person team• Made decisions at every step of software development lifecycle• Ensured specification compliance through Functional Testing and QA analysis• Worked on creation of detailed user manuals and gave presentations to customers