Laszlo K.

MS BI Developer

László is a highly experienced Data Analyst and Automation Expert with over 15 years of expertise in building impactful data solutions. He specializes in Power BI, SQL, MySQL, Excel VBA, and C#, and is known for his ability to deeply understand user needs and translate them into practical, high-impact tools.

A notable achievement in his career was at the Philharmonic, where he developed a suite of Excel- and SQL-based reporting tools with intuitive web interfaces. These custom-built solutions significantly improved operational efficiency—saving time, reducing manual errors, and streamlining internal workflows across departments.

László combines technical precision with user-centric design, delivering solutions that are as functional as they are efficient. His work consistently helps organizations enhance data accessibility, automate routine processes, and make smarter, faster decisions.

Main expertise

  • SQL
    SQL 23 years
  • VBA
    VBA 11 years
  • JavaScript
    JavaScript 15 years

Other skills

  • MySQL
    MySQL 13 years
  • Azure
    Azure 2 years
  • REST API
    REST API 2 years
Laszlo

Laszlo K.

Hungary

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Selected experience

Employment

  • Data Engineer and Analyst

    Keller Früchte + Gemüse AG - 1 year 2 months

    • Processed operational data extracted from the ERP system each day using Azure Data Factory, ensuring clean and reliable inputs for downstream processes.

    • I delivered prepared datasets to Salesforce and Optiflow on a daily schedule, helping sales teams and route planners work with accurate, up-to-date information.

    • I built a lightweight geocoding web tool using Azure Functions and Static Web Apps to support colleagues in refining delivery routes.

    • Produced clear Power BI reports on sales, OTIF and FTE metrics to inform decision-making across the business.

    Technologies:

    • Technologies:
    • Node.js Node.js
    • C# C#
    • Azure Azure
    • Microsoft Power BI Microsoft Power BI
    • Azure Data Factory Azure Data Factory
    • Azure Web App Azure Web App
    • Azure Functions Azure Functions
    • Azure Logic Apps Azure Logic Apps
    • Azure SQL Azure SQL

  • Reporting & Digitalisation Specialist in Sales Support

    MetLife Europe d.a.c. - 7 months

    • Provided monthly reporting and sales support through desktop and cloud-based automation.

    Technologies:

    • Technologies:
    • T-SQL T-SQL
    • SQL SQL
    • Azure Azure
    • Microsoft Power BI Microsoft Power BI
    • Data Engineering
    • VBA VBA
    • Data Analytics
    • Automation Testing
    • PowerShell PowerShell
    • SharePoint SharePoint
    • MS 365 Power Apps MS 365 Power Apps
    • Microsoft Power Automate Microsoft Power Automate
    • Microsoft Power Platform Microsoft Power Platform
    • Alteryx Alteryx

  • Data Analytics and Infrastructure Specialist

    Hungarian National Philharmonic - 16 years 3 months

    • Utilized tools such as Power BI, SQL Server, Excel VBA, and web-based systems to process large datasets, automate workflows, and develop scalable solutions tailored to organizational needs.
    • Created Power BI reports by processing and aggregating 50 years of daily weather data from NOAA, analyzing climate trends and deviations across European countries to identify anomalies.
    • Designed and implemented Excel tools powered by VBA for annual budget planning and cost control, automating tax calculations and importing data from external software. - These tools significantly increased data entry speed and reduced errors, with results integrated into Power BI for reporting and analysis.
    • Built a structured SQL Server concert database to record over 100 years of performances, composers, and artists, including a web-based data entry UI optimized for speed using C# and JavaScript.
    • Developed Excel-based, VBA-automated solutions for the HR department to streamline mandatory reporting on state-funded subsidies.

    Technologies:

    • Technologies:
    • MySQL MySQL
    • JavaScript JavaScript
    • MSSQL MSSQL
    • SQL SQL
    • Microsoft Power BI Microsoft Power BI
    • Data Engineering
    • VBA VBA
    • REST API REST API
    • PowerShell PowerShell
    • SharePoint SharePoint
    • Microsoft Power Platform Microsoft Power Platform

  • Data and Web Solutions Developer

    Fidelio Media Ltd. - 8 years 7 months

    • Created interactive websites and web-based data entry systems using Classic ASP, ASP.NET, VBScript, MS SQL, and MySQL to enable dynamic content management and support various data entry requirements.
    • Developed interactive websites leveraging Classic ASP (VBScript) with MS Access and MS SQL databases to support article and data entry workflows.
    • Implemented JavaScript functions to enhance data entry and query interfaces, ensuring fast, intuitive, and error-free user experiences.
    • Designed and deployed complex relational databases to efficiently manage and query large-scale information, improving workflows and data accessibility.
    • Developed web-based systems for managing and querying classical music audio recordings, delivering effective solutions for data organization and retrieval.

    Technologies:

    • Technologies:
    • MySQL MySQL
    • JavaScript JavaScript
    • MSSQL MSSQL
    • T-SQL T-SQL
    • SQL SQL
    • ASP.NET ASP.NET
    • Data Engineering
    • Database Testing
    • HTML / CSS

Education

  • MSc.Music

    Rice University, Houston, Texas, USA · 1997 - 1999

  • MSc.Music

    Liszt University, Budapest, Hungary · 1991 - 1996

Portfolio

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