Laszlo K.

MS BI Developer

Top performer 9/10

Hungary

Trusted member since 2025

23 years of experience

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

SQL23 years

VBA12 years

JavaScript15 years

Azure3 years

11+

Experience4

Data Engineer and Analyst

Keller Früchte + Gemüse AG•

Food Delivery and Restaurants

Mar 2025 · 1y 7m

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.

Node.js

Azure

Microsoft Power BI

Azure Data Factory

Reporting & Digitalisation Specialist in Sales Support

MetLife Europe d.a.c.•

Insurance

Feb 2025 - Sep 2025 · 7m

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

T-SQL

SQL

Azure

Microsoft Power BI

Azure Data Factory

10+

Data Analytics and Infrastructure Specialist

Hungarian National Philharmonic•

Music and Audio

Aug 2008 - Nov 2024 · 16y 3m

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.

MySQL

JavaScript

MSSQL

SQL

Microsoft Power BI

Data and Web Solutions Developer

Fidelio Media Ltd.•

Social Media

Jan 2000 - Aug 2008 · 8y 7m

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.

MySQL

JavaScript

MSSQL

T-SQL

SQL

Engineering excellence

All MS BI Developers who have applied to Proxify are scored from 0 to 300 on engineering excellence, one of the five parameters we evaluate. This score reflects engineering excellence only, based on interviews, take-home assignments, live coding sessions, and/or on-the-job performance reviews. The curve shows how all evaluated MS BI Developers are distributed across that range, where our acceptance threshold for this parameter sits, and where Laszlo stands.