
MS BI Developer
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.

Mapped and documented a complex SQL Server environment of nearly 200 SQL Agent jobs, SSIS packages and over 3,000 views, procedures and functions across 25 databases, making dependencies searchable ahead of planned migrations.
Prepared the switch to a new ERP data warehouse by tracing the 196 database objects and 16 jobs that still named the old one, then retiring obsolete processes and building verified replacements to keep data loads and reporting running through the cutover.
Laid the groundwork for a safe upgrade from SQL Server 2016 to 2019 with a register of over 180 upgrade and migration risks, covering deprecated drivers, legacy SSIS tasks, server settings and outdated T-SQL, so that each can be fixed before the move.
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.
Created interactive websites and web-based data entry systems using Classic ASP, ASP.NET, VB Script, MS SQL, and MySQL to enable dynamic content management and support various data entry requirements;
Developed interactive websites leveraging Classic ASP (VB Script) with MS Access and MS SQL databases to facilitate diverse article and data entry workflows;
Implemented JavaScript functions to enhance data entry and query interfaces, ensuring they were fast, intuitive, and error-free;
Designed and deployed complex relational databases to manage and query large-scale information efficiently, improving workflows and data accessibility;
Developed web-based systems to manage and query information on classical music audio recordings, providing effective solutions for data organization and retrieval.
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.

Issued May 2026
Credential ID 9cab268fcdc6224

Issued Feb 2025
Credential ID a4fc5e0d-a837-41d0-b838-4b339a70a159

Issued May 2026
Credential ID 9cab268fcdc6224






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