Thomas Bayer
Senior Software Engineer at Raiffeisen Bank International AG
Vienna, Austria
Summary
👤
Senior🎓
Top SchoolThomas Bayer is a Senior Software Engineer with 13 years of experience building resilient back-end systems and data solutions, currently based in Vienna and working at Raiffeisen Bank International. He combines deep expertise in the Microsoft BI stack, SQL and C# with hands-on experience in decisioning engines (FICO) and large-scale BI/SSAS implementations that have streamlined analytics and credit systems. Thomas is comfortable across the stack — from writing elegant Java back-end logic for API gateways to designing automated tests and ETL pipelines — and has contributed pragmatic fixes like improved error handling and REST-to-SOAP transformations in open-source projects. Calm under pressure and quietly decisive, he prefers high-fidelity delivery over flash, often stepping in as a technical lead or independent contractor to turn around complex, under-specified problems. Fluent in English and German, he brings a curious, open-minded approach to engineering trade-offs and a track record of converting business requirements into reliable, production-ready systems.
13 years of coding experience
15 years of employment as a software developer
Diploma, Object Oriented Analysis and Design, Diploma, Object Oriented Analysis and Design at Faculty Training InstituteAlbertus Magnus Schule
English, German
Github Skills (13)
javas10
api-rest10
rest-api10
api-design10
restful-api10
xslt10
java10
soap9
rest9
api9
error-handling9
apim9
api-gateway8
Programming languages (8)
Github contributions (5)
membrane/api-gateway
Oct 2012 - Jan 2023
API gateway for REST, OpenAPI, GraphQL and SOAP written in Java.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 562 reviews, 136 commits in 10 years 4 months
Contributions summary:Thomas primarily contributed to the back-end logic of the API gateway project, as evidenced by their commits focused on error handling, XSLT transformations, and REST interface modifications. Their work included wrapping `MalformedURLException` into `RuntimeException` for better error handling. The user also addressed issues related to namespace prefixes in REST to SOAP transformations and extended the pattern for the REST interface of the Admin Console. Furthermore, they added an abort handling feature for the application.
api-gatewayapisslproxysoap
predic8/simple-jenkins2
Aug 2016 - Mar 2017
Contributions:25 commits, 24 pushes, 1 branch in 6 months
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