WKFreelancer profile translated to English.
Back to original languageAbout Walter
As a Senior Database Developer with over 20 years of project experience in the finance and banking sector, I help companies make large amounts of data efficiently usable.
My focus is on MS SQL Server, T-SQL, performance tuning, and reporting – from data modeling to production-ready implementation. In projects related to IFRS 9, IRRBB, ECL, or liquidity management, I have demonstrated how complex regulatory requirements can be translated into stable, high-performance data architectures.
In addition to my SQL expertise, I bring good basic knowledge of C# and experience with SSIS and automation solutions.
I am solution-oriented, work independently, and enjoy being part of a team. It is particularly important to me to pass on knowledge in a practical way and to create sustainable solutions that genuinely relieve the burden on specialist departments.
German
Native or bilingual
English
Conversational
Can work on-site
Frankfurt am Main (up to 50km)
Experience
- HelabaData EngineerBANKING AND INSURANCENovember 2025 - May 2026 (6 months)Offenbach, GermanyDevelopment and maintenance of complex T-SQL solutions on Microsoft SQL ServerAnalysis of business requirements and implementation of technical solutions in the treasury environmentDevelopment, optimization, and quality assurance of database objects (stored procedures, views, and functions)Analysis and optimization of complex SQL queriesSupport with regulatory requirements and banking supervisory reportingReporting LDT and MREL reportsPerforming error analysis and implementing sustainable problem solutions
- Honda Bank GmbHSenior Database DeveloperFebruary 2018 - Today (8 years and 6 months)Frankfurt, GermanyDevelopment of database-supported reporting for the calculation of default risk for all loans, interest rate risk, liquidity risk, survival period, and other risks and calculations.Focus & ResultsIRRBB engine according to EBA/GL (BA) 06/2019: Funding matrix, EVE calculation, forward curves, flooring rules, and scenario analyses (parallel up/down, steepener/flatten-er, short-rate shocks).IFRS 9 Expected Credit Loss: Calculation of PD (Lifetime/Overall/1-Year), EAD, LGD, PIT factor; staging including rule-based stage transfers.Liquidity risk: Survival horizon with daily granularity, liquidity capacity, and LCR including stress scenarios. Value Risk: Expected/Unexpected Loss, VaR approach.Architecture & Working Method: Server-side calculation (SQL Server/DWH), Access/VBA frontend without additional login, configurable outputs at runtime; generic, expandable function modules.
- European Stability Mechanism (ESM),Database DeveloperJanuary 2014 - December 2017 (3 years and 11 months)LuxembourgEnd-to-end responsibility: requirements/specification document, data model, implementation, testing & test documentation, user training, maintenance.
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Education
- Industrial clerkPrivatakademie Hartnackschule Frankfurt1995Industriekaufmann
- Private studies of instrumental pedagogyFrankfurter Musikwerkstatt1990Privatstudium der Instrumentalpädagogik
Certifications
- Project Management FundamentalsThreon PM Academy2016