Senior Integration & Data Engineer | Java, Spring Boot, Kafka, Teradata | ETL & MDM
Aktualisiert am 01.07.2026
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 01.08.2026
Verfügbar zu: 100%
davon vor Ort: 0%
Data Engineering
Apache Kafka
Java
Spring Boot
Teradata
ETL
Master Data Management (MDM)
Oracle Database
PostgreSQL
Software Architecture
Microservices
Informatica
CI/CD

Einsatzorte

Einsatzorte

Österreich
möglich

Projekte

Projekte

4 years 8 months
2022-01 - now

Warehouse Labor Management (WLM) & Warehouse Bonus Management (WBM)

Lead Backend Engineer & Architect Java JavaScript TypeScript ...
Lead Backend Engineer & Architect

?      Took over an over-engineered legacy codebase, successfully consolidating 10 fragmented Maven projects into a clean 4-module architecture. Ripped out obstructing Hibernate ORM, replacing it with Spring JDBC Template to efficiently manage multi-database routing across 15 physically separated warehouse databases.

?      Engineered the backend to process heavy transactional loads from warehouse telemetry and Android devices (up to 350,000 Kafka messages daily per warehouse/~5M+ events system-wide) into structured PostgreSQL databases.

?      Designed a dynamic pivot-reporting engine allowing users to aggregate KPI data across 40 categories and 5 levels. Optimized complex dynamic SQL queries, drastically reducing report execution time from hours to mere seconds/minutes.

?      Implemented aggressive database optimization strategies using Materialized Views, dynamic PostgreSQL table partitioning (daily retention management), and for automated background maintenance tasks.

?      Architected a complex distributed system to ingest encrypted HR data (salaries, hours) and calculate employee productivity across multiple regional databases, handling edge cases like shifting calendar periods and cross-warehouse logic.

Migrated legacy session-based authentication to modern stateless JWT. Integrated complex Spring Security pipelines with OneLogin. Established automated deployment pipelines utilizing . Took full ownership of Linux server patching, manual backend deployments, and log monitoring via Splunk.
Splunk GitHub PostgreSQL Kafka Java
Java JavaScript TypeScript React Kafka Spring Boot Spring Security Maven SQL
Leading Central-European Retail Corporation
Remote
8 years 3 months
2018-06 - now

Centralized Reference Data Management (RDM) system feeding the Enterprise Data Warehouse (DWH)

Senior Data Integration Engineer & Tech Lead Java Spring Boot Python ...
Senior Data Integration Engineer & Tech Lead

?      Redesigned the data pipeline to resolve critical Stonebranch UAC workflow failures. Engineered a highly performant denormalization strategy, consolidating over 500 multi-domain, hierarchical dictionaries into a single payload, which is dynamically parsed and staged via stored procedures, .

?      Transitioned legacy manual Excel workflows into a robust, multi-tenant (10 tenants) data model using . Enforced strict tenant shielding and data privacy rules within a highly regulated environment.

?      Bypassed limitations of the native MDM tools by developing and managing a suite of 10+ custom Java/Spring Boot applications for deployment orchestration, metadata editing, and automated Excel processing (utilizing SIF calls and direct DB access). Front-end implemented in Vue.js due to corporate restrictions on React build processes.

?      Architected a 3-tier automated deployment pipeline. Replaced manual Hub Console promotions with automated MetCommand metadata synchronization wrapped in packages via .

?      Automated workflow versioning and data transfers using Python and legacy Perl scripts (LCD libraries). Integrated for secure credential management, for automated open-source vulnerability scanning and implemented the ELK stack for log monitoring.

Took over complete technical ownership from external Informatica consultants, resulting in significant cost savings. Introduced Git Flow (release branches), 4-eyes principle code reviews, and automated Release Notes generation directly into Confluence based on Jira issues.

Informatica MDM Informatica BDM Teradata Stonebranch UAC Jenkins BMC BladeLogic CyberArk ELK Stack PostgreSQL Oracle 12c Java Perl Python Bitbucket
Java Spring Boot Python Jenkins Vue.js Teradata Oracle PostgreSQL Informatica MDM Cyberark BMC BladeLogic Hadoop HBase Informatica BDM Selenium Kotlin
Major European Banking Group
Remote
2 years 5 months
2016-01 - 2018-05

Centralized Counterparty Identification

Senior MDM & Integration Engineer Master Data Management (MDM) Java Data Integration ...
Senior MDM & Integration Engineer
  • Engineered the central data-quality enforcement and workflow engines using TIBCO EBX5.

  • Designed complex data model transformations, integrating the MDM hub with local core banking systems and downstream BI consumers.

  • Implemented complex relationship mapping to visualize counterparties and link them to risk structures.

  • Integrated external risk data feeds into the MDM hub to ensure accurate calculation of credit exposure across the entire banking group.

  • Led database performance optimization and deployment management.

TIBCO WebLogic Oracle 12c Java
Master Data Management (MDM) Java Data Integration TIBCO EBX5 JavaScript SQL
Major Austrian Banking Group
Vienna

Aus- und Weiterbildung

Aus- und Weiterbildung

4 years 9 months
2005-09 - 2010-05

Management

Master's Degree (Mgr.), Univerzita Komenského (FM UK), Bratislava
Master's Degree (Mgr.)
Univerzita Komenského (FM UK), Bratislava
5 years 6 months
2000-09 - 2006-02

Software Engineering

Master of Engineering (MEng. / Ing.)., Slovenská technická univerzita (FIIT STU), Bratislava
Master of Engineering (MEng. / Ing.).
Slovenská technická univerzita (FIIT STU), Bratislava

Einsatzorte

Einsatzorte

Österreich
möglich

Projekte

Projekte

4 years 8 months
2022-01 - now

Warehouse Labor Management (WLM) & Warehouse Bonus Management (WBM)

Lead Backend Engineer & Architect Java JavaScript TypeScript ...
Lead Backend Engineer & Architect

?      Took over an over-engineered legacy codebase, successfully consolidating 10 fragmented Maven projects into a clean 4-module architecture. Ripped out obstructing Hibernate ORM, replacing it with Spring JDBC Template to efficiently manage multi-database routing across 15 physically separated warehouse databases.

?      Engineered the backend to process heavy transactional loads from warehouse telemetry and Android devices (up to 350,000 Kafka messages daily per warehouse/~5M+ events system-wide) into structured PostgreSQL databases.

?      Designed a dynamic pivot-reporting engine allowing users to aggregate KPI data across 40 categories and 5 levels. Optimized complex dynamic SQL queries, drastically reducing report execution time from hours to mere seconds/minutes.

?      Implemented aggressive database optimization strategies using Materialized Views, dynamic PostgreSQL table partitioning (daily retention management), and for automated background maintenance tasks.

?      Architected a complex distributed system to ingest encrypted HR data (salaries, hours) and calculate employee productivity across multiple regional databases, handling edge cases like shifting calendar periods and cross-warehouse logic.

Migrated legacy session-based authentication to modern stateless JWT. Integrated complex Spring Security pipelines with OneLogin. Established automated deployment pipelines utilizing . Took full ownership of Linux server patching, manual backend deployments, and log monitoring via Splunk.
Splunk GitHub PostgreSQL Kafka Java
Java JavaScript TypeScript React Kafka Spring Boot Spring Security Maven SQL
Leading Central-European Retail Corporation
Remote
8 years 3 months
2018-06 - now

Centralized Reference Data Management (RDM) system feeding the Enterprise Data Warehouse (DWH)

Senior Data Integration Engineer & Tech Lead Java Spring Boot Python ...
Senior Data Integration Engineer & Tech Lead

?      Redesigned the data pipeline to resolve critical Stonebranch UAC workflow failures. Engineered a highly performant denormalization strategy, consolidating over 500 multi-domain, hierarchical dictionaries into a single payload, which is dynamically parsed and staged via stored procedures, .

?      Transitioned legacy manual Excel workflows into a robust, multi-tenant (10 tenants) data model using . Enforced strict tenant shielding and data privacy rules within a highly regulated environment.

?      Bypassed limitations of the native MDM tools by developing and managing a suite of 10+ custom Java/Spring Boot applications for deployment orchestration, metadata editing, and automated Excel processing (utilizing SIF calls and direct DB access). Front-end implemented in Vue.js due to corporate restrictions on React build processes.

?      Architected a 3-tier automated deployment pipeline. Replaced manual Hub Console promotions with automated MetCommand metadata synchronization wrapped in packages via .

?      Automated workflow versioning and data transfers using Python and legacy Perl scripts (LCD libraries). Integrated for secure credential management, for automated open-source vulnerability scanning and implemented the ELK stack for log monitoring.

Took over complete technical ownership from external Informatica consultants, resulting in significant cost savings. Introduced Git Flow (release branches), 4-eyes principle code reviews, and automated Release Notes generation directly into Confluence based on Jira issues.

Informatica MDM Informatica BDM Teradata Stonebranch UAC Jenkins BMC BladeLogic CyberArk ELK Stack PostgreSQL Oracle 12c Java Perl Python Bitbucket
Java Spring Boot Python Jenkins Vue.js Teradata Oracle PostgreSQL Informatica MDM Cyberark BMC BladeLogic Hadoop HBase Informatica BDM Selenium Kotlin
Major European Banking Group
Remote
2 years 5 months
2016-01 - 2018-05

Centralized Counterparty Identification

Senior MDM & Integration Engineer Master Data Management (MDM) Java Data Integration ...
Senior MDM & Integration Engineer
  • Engineered the central data-quality enforcement and workflow engines using TIBCO EBX5.

  • Designed complex data model transformations, integrating the MDM hub with local core banking systems and downstream BI consumers.

  • Implemented complex relationship mapping to visualize counterparties and link them to risk structures.

  • Integrated external risk data feeds into the MDM hub to ensure accurate calculation of credit exposure across the entire banking group.

  • Led database performance optimization and deployment management.

TIBCO WebLogic Oracle 12c Java
Master Data Management (MDM) Java Data Integration TIBCO EBX5 JavaScript SQL
Major Austrian Banking Group
Vienna

Aus- und Weiterbildung

Aus- und Weiterbildung

4 years 9 months
2005-09 - 2010-05

Management

Master's Degree (Mgr.), Univerzita Komenského (FM UK), Bratislava
Master's Degree (Mgr.)
Univerzita Komenského (FM UK), Bratislava
5 years 6 months
2000-09 - 2006-02

Software Engineering

Master of Engineering (MEng. / Ing.)., Slovenská technická univerzita (FIIT STU), Bratislava
Master of Engineering (MEng. / Ing.).
Slovenská technická univerzita (FIIT STU), Bratislava

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