Senior Business Intelligence Engineer - Data Architect

• Jan 2023 - Present

Principal Data Scientist

• May 2022 - Apr 2023

Nikos works for Enterprise & Business Marketing Fixed and Mobile division on Business Intelligence department

Senior Data Analyst

• Oct 2012 - Aug 2022

Nikos worked for Retail Marketing Fixed and Mobile division on Customer Insights and Pricing Analysis department providing product owners advance business analytics for customer base segmentation, traffic behavior and arpu throughout customer’s journey : acquisition, cross-selling, renewal, retention, notification, upselling with the various COSMOTE products (mobile contract, what’s up, ONE). Acted as liaison with IT (dwh) for implementing, monitoring, analyzing products with the desired data. Helped management making effective decisions on minimum revenue impact (business cases) and set goals with reports and analyses in weekly, monthly base. Supported marketing business ad hoc requests based on data insights. Presented information and analysis to upper management in a professional and timely manner (power bi). Followed international data analysis patterns (etl, model thinking, advanced presentation). Show less

Software Engineer

• Mar 2007 - Oct 2012

Worked on mobile IT middleware division (SOA - BUS currently Order Management), responsible for integrating internal and external real time IT systems.Documented requirements of front systems (pos, ivr, crm, portal) and backend (prepaid, postpaid systems) and interacted with development (internal and external resources) to analyze and design functional enhancements.Assigned technical project manager on several IT cross projects and organized project team and plan, followed up resources, interacted with commercial side, organized and followed up acceptance tests, roll out plan (UAT, FUT).Participated on architecture decisions, steer committees, and in software development, maintenance, having had heavy emphasis on problem solving and working on own initiative to produce goals. Managed resources of subcontract team from cognity vendor (timesheets, project cost, priorities).Worked with vendors Accenture, Cognity, Oracle, Ericsson, HP and familiarized with mobile Billing Postpaid, mobile Billing Prepaid, Siebel, Collection, mobile Network, mobile DWH systems. Show less

Consultant

• Oct 2006 - Mar 2007

Delivery of e-banking services to clients and contribution to service definition and development. Project participation: IBM Enterprise Service Bus set up on Eurobank bank. “One Time Password” on National Bank of Greece for portal and phone banking access. New portal on latter customer. Delivery of e-banking services to clients and contribution to service definition and development. Project participation: IBM Enterprise Service Bus set up on Eurobank bank. “One Time Password” on National Bank of Greece for portal and phone banking access. New portal on latter customer.

Researcher and Development Engineer

• Sep 2003 - Jan 2005

Participation, at the European research project "IST BROADWAY The way to broadband access at 60 GHz” ( ftp://ftp.cordis.europa.eu/pub/ist/docs/directorate_d/cnt/neweve/broadway_en.pdf ) Implemention in NS-2 (Network Simulator - 2, http://www.isi.edu/nsnam/ns/) of Work Package 2 (Link and convergence layer architecture). Participation, at the European research project "IST BROADWAY The way to broadband access at 60 GHz” ( ftp://ftp.cordis.europa.eu/pub/ist/docs/directorate_d/cnt/neweve/broadway_en.pdf ) Implemention in NS-2 (Network Simulator - 2, http://www.isi.edu/nsnam/ns/) of Work Package 2 (Link and convergence layer architecture).