European Central Bank

IT Application Development Specialist

•Improved a dashboard in Tableau by replacing joins with the relationships between tables and performing data quality checks in data for upgrading the dashboard's velocity and accuracy.
 
•Renovated the end-to-end deployment of the Backup and Restore test results dashboard according to business requirements for keeping track of the yearly progress.

•Optimized the asset management quality check process by developing an application in Mendix that reduces the duration of the process by 30 per cent.

•Operating problem tickets for ensuring that follow the process in a timely manner by coordinating involved parties and evaluating root causes - solutions. 

•Advanced my data skills by transforming JSON data in tabular form for a POC of the monitoring team.

Trainee in the Infrastructure operations systems

Accenture Greece

•Applied customer segmentation analysis by using RF and a variety of clustering algorithms for setting homogeneous groups which can increase their sales potentiality by using pyspark in Databricks.

•Predicted the optimal visit frequency in clients’ stores by using machine learning regression. Tunning its performance by adding a threshold in the correlation between dependent and independent and testing a variety of regression methods.

•Evaluated algorithm results by inspecting them in detail, which successfully helped to identify code bugs, missing data, and results' inconsistencies with python/pyspark on Azure Databricks environment.

•Investigated the data in order to avoid discrepancies between given data and clients’ database with pyspark.

Data Science Analyst

MEDMAR MARINE SERVICES

Medmar is an accredited Group of Companies with a presence both in Greece and Hong Kong supplying Marine Spare parts and Technical Support.

•	Created an excel dashboard that produced monthly cash flow tables and graphs with the total number of orders for each client, achieved a real-time analysis of the financial data with remote access for the owners.

•	Updated and maintain the suppliers’ database (with SQL) that efficiently helped to eliminate the wrong records. Reduced the failed/ rejected emails and improved the communication chain for buyer-Medmar-supplier and vice versa by 30%.

Junior Database Analyst

Compulsory Military Service in the Hellenic Airforce

•	Solved challenging issues by producing action plans, worked in a strict environment with specific rules and no room for mistakes, learned to work under pressure.

 Administrative Responsibility Management Office Assistant at Ministry of Defense

Cpk Consulting

The company aims to provide high-quality consulting services to accommodations institutions.

•	Analysed and presented a report of the hotel market competitiveness that showed the current market condition to senior consultant. 

•	Prepared a price analysis report for the hotel services in the local area by collecting and processing data from different sources with python.

•	Participated in project meetings, with the senior consultant and business analyst to record the progress that have been made on the business plan of the lesante blue hotel at Zakynthos, Greece.

•	Collaborating with the senior consultant to conduct a quantitative analysis of the tourist market trends to estimate the recuperate period of the investment using Python.

Research Data Analyst

Ocean lifeguard

•	Addressed daily meetings to identify weather conditions, make action and monitoring plans to spot potential hazards and prevent accidents.

•	Coordinated a team of ten people, contacted safety inductions, and completed weakly progress reports.

•	Planned monthly shift rota for staff, improved managerial skills.

Lifeguard

A Data Scientist & Engineer Analyst with demonstrated ability to collecting, manipulating, analysing, and developing machine learning models. Motivated and challenged by investigating data anomalies and improving pipelines for finding data inconsistencies that drive meaningful impact on the business. Experienced in working with multicultural and interdisciplinary teams but also recognised for problem-solving, great leadership potential, eager to work under pressure and do overtime.

Taplio

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Taplio

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Orestis Makris's Linkedin Analytics