Open to opportunities

Klaudio User

@klaudiouser

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Data and BI Engineer delivering actionable analytics with AI and cloud expertise.

Greece

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What I'm looking for

I seek a hands-on data engineering/BI role where I can build scalable ETL pipelines, craft insightful dashboards, work with cloud data platforms, and grow into AI/ML-driven analytics within a collaborative, growth-oriented team.

I am a tech-savvy Data and BI Engineer with experience across banking, insurance, maritime, and telecommunications, delivering data-driven solutions using Microsoft Fabric, Power BI, Databricks (PySpark), and Azure/AWS services. I design and optimize ETL/ELT pipelines, build dashboards and analytical models, troubleshoot both on-premises and cloud reporting systems, and produce technical documentation and BRDs.

I have implemented scalable data solutions using SQL Server (SSIS/SSRS/SSAS), Spark, Airflow, and cloud storage (S3, Delta Tables), and automated operations with scripting and orchestration tools. I take ownership of production systems, optimize query and Spark performance, and translate business requirements into maintainable analytics and BI deliverables.

Experience

Work history, roles, and key accomplishments

Current

Business Intelligence Engineer

Current

CepalHellas SA

Apr 2025 - Present (6 months)

Developed Microsoft Power BI dashboards and managed Fabric workspaces; implemented ETL/ELT pipelines with Databricks (Spark SQL, PySpark) and optimized Spark jobs and Delta Tables to improve reporting performance and reliability.

Power BI Databricks Pyspark Delta Lake Airflow

Data Engineer / Data Analyst

InTTrust SA

Feb 2024 - Apr 2025 (1 year 2 months)

Built and maintained ETL pipelines with SSIS and T-SQL, authored SSRS paginated reports and SSAS OLAP cubes, and processed large-scale data with Apache Spark and Airflow to support analytics workloads.

SSIS T SQL SSAS Apache Spark Airflow Python Pandas ETL

Business Analyst / SQL Engineer

Ulysses Systems SA

Jun 2023 - Feb 2024 (8 months)

Translated business requirements into technical specifications and built complex T-SQL queries and paginated SSRS reports to support ERP deployments and reporting across vessels and offices.

Business Analysis T SQL Database Design Requirements Gathering ERP SQL Server Troubleshooting

Banking Support Specialist

Piraeus Bank SA

May 2019 - Jul 2022 (3 years 2 months)

Resolved customer inquiries and processed financial transactions via multiple channels while maintaining account data accuracy and escalating product issues to improve customer satisfaction.

Customer Support Banking Operations Communication Problem Solving Time Management Ticketing

Back Office Agent

Sky Express SA

Jun 2017 - May 2018 (11 months)

Served as primary client contact for travel bookings and itinerary support, resolved booking issues and assisted customers during travel disruptions to ensure service continuity.

Customer Service Communication Multitasking

Education

Degrees, certifications, and relevant coursework

Big Blue Data Academy

Professional Certificate, Data Analytics

2022 - 2023

Activities and societies: 280+ hour program focused on data analytics lifecycle, ETL, Spark, Airflow, Power BI

Completed an advanced data analytics bootcamp covering Apache Spark (Python), Airflow orchestration, ETL pipelines, Power BI, SQL, and machine learning fundamentals.

University of Piraeus

Bachelor of Arts, Economics

2014 - 2019

Activities and societies: 3-month internship at the National Bank of Greece; database and ERP related coursework; military obligations 2018-2019

Completed studies in the Department of Economics with coursework in quantitative methods, econometrics, economic theory, mathematics, and statistics; participated in a 3-month internship at the National Bank of Greece.