Sotos Matzanas's Email Addresses & Phone Numbers

📖 Summary

Senior Software engineer with 16 years of experience using Big Data technologies to build high performing, scalable, fault tolerant back end systems for top companies in Silicon Valley and EuropeSenior Big Data Engineer @ From January 2015 to Present (10 months) San FranciscoSenior Big Data Engineer @ From June 2014 to January 2015 (8 months) Technology Specialist, Analytics Group @ Project: Analytics Involved in Smart Steps, a joint project between 4 countries to accurately measure customer activity at any point with cellular coverage. Defined standard formats for all types of data processed, participated in ETL processes, and wrote the main map/reduce jobs that aggregate observed data and generate vectors for use by the visualization platform. Implemented a catchment feature, that measures percentages of the major geographical spots where observed footfall comes from. Implemented tools and crawlers to gather social network information and derive statistics and metrics about user interaction and inter-connectivity Project: Social Proximity Enabler/Emerging Technologies group. Participated in the design phase of the core Orchestrator part, and implemented most of its functionalities. Proposed the use of Hadoop and its declarative language (PIG) which led to a very fast implementation phase. Proposed and developed a modular and extensible way to store historical data from our daily hadoop outputs. Developed parts of our DAO objects and worked with storing them efficiently in a Mongo database. Worked with our graph traversal algorithms using Neo4J and put a cache layer on top of them using Redis. Technologies used: Big Data, Java, Python, Mongo Db, Neo4J, Hadoop, PIG, Redis, Spring framework From July 2010 to December 2013 (3 years 6 months) Barcelona Area, SpainSenior Software Engineer @ - Responsible for all offline and online log processing - Implemented Live Stats (real time statistics) for both publisher and advertiser dashboard pages - Setup and run the first Hadoop cluster in the company and moved most log processing to it From May 2007 to October 2009 (2 years 6 months) Senior Technical Yahoo @ Senior Technical Yahoo/Architect, Yahoo! Europe London UK Involved in the design phase of major projects for the European market, including Local Search, Assisted Search, and Answers. Senior Technical Yahoo, Sunnyvale CA Designed and implemented key new features for Yahoo’s front page redesign (project Spirit) such as Messenger, Answers and Horoscopes personal assistant modules, plus a content management tool used by front page editors for the creation, review and approval of Yahoo! Pulse modules. Involved in the design and implementation of Yahoo! Alerts v2.0 Developed a bulk email MTA for efficient email delivery. The MTA (Yahoo! BulkServer) was used by most Y! properties that needed fast and efficient delivery of outbound email to a variety of domains. It was also used as the email delivery platform for the Mass Mailing server. Involved in the design and implementation of Yahoo’s polls and ratings services. From February 1999 to April 2007 (8 years 3 months) Senior Software Engineer @ Involved in the architecture, implementation and maintenance of versions 2.0, 3.0 and 4.0 of Oracle’s Web Server, a CORBA-based, high performance, multi-threaded platform with cartridge plug-in capabilities in various programming languages. Responsible for the C/C++ cartridge, load balancing and fail over aspects of the project. From 1994 to 1998 (4 years) MSc, Computer Science @ University of California, Santa Barbara From 1992 to 1994 BSc, Computer Engineering and Informatics @ University of Patras From 1987 to 1992 Sotos Matzanas is skilled in: Java, NoSQL, Hadoop, C++, C, Mongo Db, MySQL, Linux, Unix, Spring, Symfony, PHP, Neo4J, PIG, High Availability, Solr, Eclipse, Redis, Hive, Design Patterns, MongoDB, Scalability, Python, Big Data, MapReduce, Databases, Algorithms, REST, Multithreading, Git, Bash, Architectures