Work experience

02/2019 - Present    Data Scientist - Principle Analyst, Media Centre of Excellence, IRI ACE, Athens

• Product development and big data analysis on Hadoop Hive
  
• Combine and analyze multiple data sources of media campaign exposure, point-of-sale, frequent shopper and causal data to get deeper insights of actual in-store sales lift impact of ad spend
  
• Monitor, evaluate and optimize code quality and speed
  
• Responsible for the maintenance, development and team support of various products

05/2017 - 02/2019    Data Analyst, Analytics Department, Intelen Inc, Athens

• Design, develop and maintain analytics app (R Shiny) for the following purposes: data visualisation, statistical results, simulation, KPI monitoring, customer scoring & segmentation, predictive modelling, etc.
• Use supervised and unsupervised machine learning methods to optimize customer experience, revenue generation and other business outcomes
• Enhance customer experience building recommender systems for personalized services
• Develop and automate reporting processes
• Define, measure and monitor KPIs
• Design new data-driven business products

07/2016 - 05/2017   Data Scientist, Credit Risk Department, ICAP Group, Athens

• Prepare the thesis “Storage of Default Characterization Data”, as part of the M.Sc. in Business Analytics, Athens University of Economics and Business
  
• Support regulatory requirements on reporting and monitoring of ICAP’s credit assessment evolution data to regulators
• Support reporting to European Rating Platform (ERP/RADAR), the platform maintained by ESMA on credit rating agencies data
• Design, develop and maintain statistical procedures and tools (automated and semi-automated procedures) for the monitoring of credit assessment evolution in SAS and R softwares, as well as, data management and automation activities
• Model analysis processes

01/2015 – 10/2015   Researcher, Telephone Research Department, Metron Analysis S.A., Athens

• Participate in the conduction of various research projects in the section of the telephone survey department.
  

09/2014 – 06/2015   Professor of Mathematics, Freelancer, Athens

• Improved a high school student’s mathematical skills by preparing him for the school exams.
  

 Education

10/2015 - 01/2017   M.Sc. in Business Analytics, Athens University of Economics and Business

Degree with Distinction, 8.86 / 10

Field Study Project (Master Thesis) conducted in ICAP Group:
Development of automated system in R for the following activities on default characterization data:

• Data cleansing, exploration and transformation
  
• Statistical reporting and visualization
  
• Creation of historical database and integration in optimised data schema

Part of master projects:

• Data warehousing, Data management, ETL (MySQL, MemSQL, Java, R)
  
• Statistical analyses with R using various methods, e.g. regression, classification, clustering, LASSO, PCA, Naïve Bayes, etc.
• Application development using big data tools like Hadoop, Spark, Redis, MongoDB and Neo4j (Java, Scala, R)
• Data Mining, Large Scale Optimization, Visual Analytics, Recommender Systems, Business Analysis
  
  

10/2008 – 09/2013   B.Sc. in Mathematics, University of Athens

• Main topics of interest: Probability Theory, Operations Research, Stochastics, Statistics

 Technical skills

• R, Python, Base SAS, Java, Scala, MATLAB, Julia
• Experience with SQL and NoSQL databases including MySQL, PostgreSQL, MemSQL, Spark, Hive, Hadoop, MongoDB, Cassandra, Redis, Neo4j
• Familiarity with markup languages including Markdown, HTML, XML
• Data Mining, BI and Visualization tools: Pentaho, SAS Enterprise Miner, Rapid Miner, Spotfire, IBM Watson
• Business Modelling tools, e.g. ARIS

 Professional development

07/2018 - 08/2018   Data Scientist with Python, Datacamp Career Track

02/2018 - 03/2018   Data Scientist with R, Datacamp Career Track

02/2018 - 04/2018   R Programmer, Datacamp Career Track

02/2018 - 04/2018   Data Analyst with R, Datacamp Career Track

01/2017 - 03/2017   Mastering Software Development in R, Coursera Specialization (2 out of 5 courses completed)

Courses/Certificates:

1. The R Programming Environment
2. Advanced R Programming

08/2016 - 02/2017   Big Data, Coursera Specialization (5 out of 6 courses completed)

Courses/Certificates:

1. Introduction to Big Data
2. Big Data Modeling and Management Systems
3. Big Data Integration and Processing
4. Machine Learning With Big Data
5. Graph Analytics for Big Data

03/2015 - 05/2015   Analytics Edge, MIT - edX course

02/2015 - 05/2015   Introduction to Probability - The Science of Uncertainty, MIT - edX course