09/03/2026 updated
not available
info: not available until 12/31/2026
Senior Data Engineer | Informatica PowerCenter | IDMC | PySpark | Databricks Certified
Varna, Bulgaria
Only remote
Master of Computer Science, Technical University Varna, Bulgaria (2007-2012)About me
Senior Data Engineer mit über 15 Jahren praktischer Erfahrung in Enterprise-Datenintegration, ETL-Engineering und PySpark-basierten Datenpipelines. Derzeit verfügbar für Remote-Projekte auf Vertragsbasis — vorrangig im DACH-Raum.
Big DataData ArchitectureData CentersData ControlData InfrastructureData IntegrationData IntegrityExtract Transform Load (ETL)Data MartData IntelligencePython (Programming Language)Smart DataDatabase EnginesInformatica PowercenterApache Spark
Modern Data Engineering
Expertise in Apache Spark and PySpark, Databricks (Data Engineer Associate certified), Kubernetes, OpenShift, Docker, Helm, Argo Workflows and Automic for building and optimizing containerized data pipelines in cloud-native environments.
Data Integration with Informatica and IDMC
Deep knowledge of Informatica PowerCenter and IDMC for enterprise ETL/DWH processes, including complex SQL implementation, PL/SQL changes, data quality improvements and controlled change delivery.
Databases and SQL
Strong background in Oracle, PL/SQL, SQL performance tuning, complex joins, stored procedures, Teradata, DB2, SQL Server and PostgreSQL for enterprise data warehouse solutions.
Programming and Scripting
Proficiency in Python, OOP ETL frameworks, Pandas, Koalas, Spark SQL, Java, custom NiFi processors and plugins, BASH/KornShell and Bitbucket CI/CD for automation and data processing.
Apache NiFi and Kafka
Experience creating, monitoring, debugging and fine-tuning Apache NiFi flows for enterprise data integration scenarios, including custom NiFi processors and Java plugins, as well as Kafka integration.
Performance Engineering
PySpark bottleneck analysis, cluster resource tuning, partitioning strategies and runtime optimization to reduce runtime and improve cluster efficiency.
Production Support and Operations
Production support, root-cause analysis, performance tuning, debugging, ITIL practices, documentation, client delivery and technical trainings for business-critical ETL and data integration systems.
REST APIs and Cloud Integration
Development and automation logic using Informatica Cloud Application Integration and Python, including REST/API-oriented data exchange flows.
Expertise in Apache Spark and PySpark, Databricks (Data Engineer Associate certified), Kubernetes, OpenShift, Docker, Helm, Argo Workflows and Automic for building and optimizing containerized data pipelines in cloud-native environments.
Data Integration with Informatica and IDMC
Deep knowledge of Informatica PowerCenter and IDMC for enterprise ETL/DWH processes, including complex SQL implementation, PL/SQL changes, data quality improvements and controlled change delivery.
Databases and SQL
Strong background in Oracle, PL/SQL, SQL performance tuning, complex joins, stored procedures, Teradata, DB2, SQL Server and PostgreSQL for enterprise data warehouse solutions.
Programming and Scripting
Proficiency in Python, OOP ETL frameworks, Pandas, Koalas, Spark SQL, Java, custom NiFi processors and plugins, BASH/KornShell and Bitbucket CI/CD for automation and data processing.
Apache NiFi and Kafka
Experience creating, monitoring, debugging and fine-tuning Apache NiFi flows for enterprise data integration scenarios, including custom NiFi processors and Java plugins, as well as Kafka integration.
Performance Engineering
PySpark bottleneck analysis, cluster resource tuning, partitioning strategies and runtime optimization to reduce runtime and improve cluster efficiency.
Production Support and Operations
Production support, root-cause analysis, performance tuning, debugging, ITIL practices, documentation, client delivery and technical trainings for business-critical ETL and data integration systems.
REST APIs and Cloud Integration
Development and automation logic using Informatica Cloud Application Integration and Python, including REST/API-oriented data exchange flows.
Experience
Professional experience10+ years
Freelancer since2024
Languages
BulgarianNative speakerGermanFluentEnglishFluent
Project history
Delivered projects for a Major German Automotive Enterprise: developed and optimized containerized PySpark data pipelines; delivered enhancements and fixes for enterprise ETL/DWH processes using Informatica PowerCenter and PL/SQL; implemented fixes and new features in IDMC Data Integration; developed integration and automation logic using Informatica CAI and Python. Contributed as a senior hands-on engineer in production support, root-cause analysis, defect resolution, performance tuning and controlled delivery of business-critical changes. Environment: Python, PySpark, Pandas, Spark SQL, Kubernetes/OpenShift, Docker, Helm, Argo Workflows, Bitbucket CI/CD, Informatica PowerCenter, IDMC Data Integration, Informatica CAI, Oracle, SQL, PL/SQL, Automic, REST APIs.
Created, monitored, debugged and fine-tuned Apache NiFi flows for enterprise data integration scenarios. Developed custom NiFi processors and Java plugins to enable external API connectivity and extend platform capabilities. Participated in client delivery including technical analysis, implementation design, troubleshooting and production-oriented fixes. Worked in a containerized environment using Kubernetes and Docker, with Kafka and Elasticsearch. Environment: Apache NiFi, Kafka, Java, Elasticsearch, Kubernetes, Docker, REST APIs.
Application Management Support for a Major German Automotive Enterprise (2015-2022): Provided 2nd and 3rd level support for core DWH systems, performed root-cause identification and troubleshooting, tuned Informatica mappings, sessions, workflows, PL/SQL procedures and complex SQL queries, managed problem and known-error analysis with ITIL practices, coordinated development, operations, business and client-side stakeholders. ETL Developer / Data Warehouse Engineer (2013-2022): Created, monitored and debugged Informatica mappings, sessions and workflows; designed and implemented new or redesigned ETL modules; developed object-oriented Python code, PySpark workflows and KornShell/BASH scripts; analyzed and extended PL/SQL code and SQL scripts; produced technical documentation. Quality Assurance Specialist (2012-2013): Worked on data warehouse projects for major Canadian insurance companies; reviewed mapping/design documents and maintained QA-specific SQL scripts; participated in documenting, resolving and regression testing identified defects. Environment: Informatica PowerCenter, Oracle, PL/SQL, SQL, QlikView, SAP BusinessObjects, UNIX, Windows, Python, Pandas/Koalas, PySpark, Argo Workflows, Helm, Docker, Teradata 13, IBM DB2, Microsoft SQL Server 2008.