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Bogdan Mierloiu

@bogdanmierloiu

Data Engineer at Flutter Studios / Betfair Romania, building production streaming and batch data platforms with Kafka, Spark, and Iceberg.

Romania

Message

At Flutter Studios / Betfair Romania, I build and operate production data platforms for regulated gaming environments. I develop Kafka and Spark Streaming flows that persist curated datasets in Apache Iceberg, Amazon S3, and Amazon Keyspaces.

At BCR Leasing Romania, I develop and support SQL Server Data Warehouse workloads for financial processing and reporting. I designed an execution-monitoring and audit framework for a financial calculation flow orchestrating nine downstream stored procedures.

Earlier, I worked on enterprise banking data platforms at accesа.eu, building Spark, Kafka, and Airflow pipelines. I also developed backend applications at accesа.eu and the Romanian Ministry of Internal Affairs, and built projects for Iceberg maintenance, Kafka test data generation, and database and BI CI/CD.

Experience

Work history, roles, and key accomplishments

Current

Data Engineer, B2B

Current

Flutter Studios / Betfair Romania

Jul 2025 - Present (1 year 3 months)

Build and operate production data platforms supporting regulated gaming environments. Design real-time data flows using Apache Kafka and Spark Streaming, and develop Spark batch and streaming workloads in Scala.

Apache Spark Spark Streaming Kafka Amazon MSK (Kafka)Apache Iceberg S3 Amazon Keyspaces Scala Python AWS Glue Airflow EMR Serverless Athena Trino QuickSight Grafana Loki

Data Engineer, B2B

BCR Leasing Romania

May 2025 - Oct 2026 (1 year 5 months)

Develop and support production SQL Server Data Warehouse workloads used in financial processing and reporting. Maintain SSIS ETL pipelines and optimize stored procedures and SQL Agent workflows.

SQL Server SSIS SCD2 Stored Procedures Performance Optimization Flyway Git CI CD

Data Engineer

Accesa.eu

Aug 2024 - May 2025 (9 months)

Worked on enterprise banking data platforms, building batch and event-driven data pipelines using Apache Spark, Kafka and Apache Airflow. Developed Spark applications in Java and maintained Airflow workflows.

Apache Spark Kafka Airflow Java S3 Parquet Delta Lake OpenShift

Software Engineer

Accesa.eu

Sep 2023 - Aug 2024 (11 months)

Developed REST APIs using Java and Spring, integrating backend logic with databases and external services. Deployed services on Google Cloud Run and contributed to CI/CD pipelines.

Java Spring Framework REST APIs Google Cloud Run CI CD

Software Engineer Intern

Accesa.eu

Jul 2023 - Sep 2023 (2 months)

Contributed to the development of a backend API for a workflow and ticket-management application using Java and Spring. Implemented OAuth 2.0 authentication and collaborated through Git-based development.

Java Spring Framework OAuth Git Agile

Software Engineer

Romanian Ministry of Internal Affairs

Apr 2021 - Jul 2023 (2 years 3 months)

Designed and developed an internal workflow and ticket-management application supporting request tracking and multi-step approval processes. Worked within an Active Directory-based enterprise environment.

Java Spring Framework Active Directory Authentication Access Control

Criminal Investigator

Bucharest Municipal Police

Jul 2013 - Apr 2021 (7 years 9 months)

Conducted criminal investigations requiring analytical problem solving, evidence assessment, stakeholder coordination and responsible handling of sensitive information.