Dimosthenis T.

Data Engineer

Dimosthenis is a Data Engineer with 12 years of commercial experience in database management, data warehousing, and reporting solutions. He is proficient in MSSQL, MySQL, PostgreSQL, MongoDB, SSIS, SSAS, Kafka, Power BI, Python, and C#.

He led a large-scale database cleaning and persona creation project for a major Greek marketplace, managing over 18 million customer records. The initiative involved designing real-time pipelines using Kafka and RedPanda to merge duplicate customer profiles while preserving the platform’s existing functionality.

Known for his precision, innovation, and collaborative approach, Dimosthenis consistently delivers reliable and high-impact data solutions.

Main expertise

  • Data Engineering 5 years
  • Python
    Python 5 years
  • SQL
    SQL 12 years

Other skills

  • Visual Studio
    Visual Studio 8 years
  • VBscript 4 years
  • Kubernetes
    Kubernetes 2 years
Dimosthenis

Dimosthenis T.

Greece

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Selected experience

Employment

  • Data Integration Engineer

    Chubb - 2 years 1 month

    • Analyzed IBM DB2 legacy databases and migrated them to modern database solutions, improving performance and maintainability.
    • Designed and implemented databases, stored procedures, and functions across SQL Server, MySQL, PostgreSQL, and MongoDB.
    • Built and maintained Data Factories and pipelines on Azure DevOps, ensuring reliable and automated data workflows.
    • Created and optimized MongoDB collections and containers with Atlas, tailored for scalable enterprise data needs.
    • Developed data pipelines on both AWS and Azure, ensuring cross-cloud interoperability.
    • Designed and maintained data warehouses, OLAP cubes, and ETL pipelines for advanced reporting and analytics.
    • Implemented Kafka streams and topics using ksql scripts, enabling real-time data integration.
    • Used SQL and Python to perform data correction and ensure high-quality datasets.

    Technologies:

    • Technologies:
    • MongoDB MongoDB
    • PostgreSQL PostgreSQL
    • MSSQL MSSQL
    • Python Python
    • Apache Kafka Apache Kafka
    • SQL SQL
    • Azure Azure
    • Azure Data Factory Azure Data Factory
    • Data Engineering
    • ETL ETL

  • Data Integration Engineer

    Pfizer Greece - 1 year 5 months

    • Used SQL and Python, mainly for data correction, to ensure high-quality datasets.
    • Monitored and optimized high-volume data flows using Kubernetes and Grafana, ensuring real-time observability.
    • Designed and maintained relational and non-relational databases, including SQL Server, MySQL, PostgreSQL, and MongoDB.
    • Built and deployed data pipelines with Azure Data Factory and AWS services to manage large-scale healthcare datasets.
    • Provided advanced solutions for complex database challenges across distributed systems.
    • Designed and optimized ETL processes and migration tools, improving data accuracy and consistency.
    • Built and maintained data warehouses and cubes for advanced analytics in collaboration with BI teams.
    • Designed and implemented Kafka streams with ksql to integrate heterogeneous data sources.

    Technologies:

    • Technologies:
    • MongoDB MongoDB
    • PostgreSQL PostgreSQL
    • MSSQL MSSQL
    • Python Python
    • Apache Kafka Apache Kafka
    • Kubernetes Kubernetes
    • SQL SQL
    • Azure Azure
    • Grafana Grafana
    • Azure Data Factory Azure Data Factory
    • Data Engineering
    • ETL ETL
    • Team Leading

  • Data Engineer

    Satori Analytics - 1 year 7 months

    • Used SQL and Python, mainly for data correction, to ensure high-quality data.
    • Designed and optimized stored procedures, functions, and queries in SQL Server, MySQL, and PostgreSQL to meet client requirements.
    • Developed SSIS projects in Visual Studio 2019 to automate ETL processes and data integration.
    • Built and deployed Data Factories on Azure and pipelines on AWS for cross-cloud data processing.
    • Designed and maintained data warehouses, cubes, and migration tools for multiple enterprise clients.
    • Created automated SSRS reports and visual dashboards for PMI (Philip Morris International) and other clients.
    • Provided technical consulting on database optimization, reducing costs and improving performance.

    Technologies:

    • Technologies:
    • MySQL MySQL
    • PostgreSQL PostgreSQL
    • AWS AWS
    • MSSQL MSSQL
    • Python Python
    • SQL SQL
    • Azure Azure
    • Azure Data Factory Azure Data Factory
    • Data Engineering
    • SSIS SSIS
    • Data Analytics
    • Visual Studio Visual Studio
    • ETL ETL
    • SSRS

  • Founder & Owner

    AnalyzeIT.com.gr - 3 years 5 months

    • Served as founder and technical lead, overseeing all business operations, client relations, and project delivery.
    • Conducted requirement analysis and provided consulting for clients with complex business and database needs.
    • Managed web development projects from estimation to delivery, ensuring completion on time and within budget.
    • Designed and developed desktop and web applications, integrating database-driven features to improve efficiency.
    • Held daily staff meetings to define project agendas, assign tasks, and ensure alignment with client expectations.
    • Delivered advanced database optimization solutions for clients requiring high performance.
    • Built long-term client relationships by combining technical expertise with transparent communication and support.

    Technologies:

    • Technologies:
    • PHP PHP
    • MySQL MySQL
    • JavaScript JavaScript
    • Project Management
    • MSSQL MSSQL
    • PrestaShop PrestaShop
    • Data Engineering
    • Team Leading

  • Data Engineer

    Accepted Ltd - 11 months

    • Designed and optimized databases and ETL pipelines across SQL Server and PostgreSQL environments.
    • Built automated workflows to ensure seamless data ingestion and transformation.
    • Developed and maintained SSIS projects for large-scale data integration.
    • Implemented data warehouses and OLAP cubes to support analytics and reporting.
    • Designed visual dashboards and SSRS reports for management, providing real-time insights.
    • Optimized existing queries and stored procedures, significantly reducing execution times.
    • Used VBScript to automate tasks in Excel files and other Windows environment processes.
    • Used SSMS to create jobs and packages for automation tasks.

    Technologies:

    • Technologies:
    • PostgreSQL PostgreSQL
    • MSSQL MSSQL
    • SQL SQL
    • Azure Azure
    • Azure Data Factory Azure Data Factory
    • Data Engineering
    • SSIS SSIS
    • Data Analytics
    • ETL ETL
    • VBscript
    • SSRS

Education

  • BSc.Informatics Engineering

    Western Macedonia University of Applied Sciences, Kastoria · 2007 - 2014

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