Onur Tokat

ONUR TOKAT DATA ARCHITECT / SENIOR DATA ENGINEER DETAILS Orli Torgau-Str. 7, 54294 Trier Germany -- LINKS Linkedin SKILLS Java Scala Python Hadoop Apache Spark Kafka Azure Analytics Google Analytics Databricks LANGUAGES English German Turkish TRIER, GERMANY - PROFILE Data Architect and Senior Data Engineer with 10+ years’ experience in cloud data platforms, big data pipelines, and analytics. Expert in Azure, Databricks, Kafka, Spark. Proven track record in migration, architecture design, and cross-industry data solutions. EMPLOYMENT HISTORY Data Architect / Senior Data Engineer at Eurowings Digital GmbH, Cologne May 2022 — Present • Research and implement efficient data architectures and patterns on the Azure Data Platform (Databricks Unity Catalog) • Support on-premises to cloud migration projects • Contribute to CRM-CDP architectural design projects • Develop ETL data pipelines using Databricks Spark (Scala, Python) and schedule them in Azure Data Factory • Participate in architectural decision-making meetings • Design and manage data warehouses (Azure SQL, Synapse) and deliver data via Power BI • Share knowledge and mentor junior team members • Lead data engineers to deliver data projects successfully Big Data Engineer Consultant at Collectivei, New York City September 2021 — May 2022 • Integrate data from various sources (voice, video, email, unstructured documents, binary files, log files) • Develop scalable data processing pipelines using Apache Spark (Java, Scala, Python) • Conduct performance benchmarking for Spark jobs • Interpret specifications and translate them into code and design documentation • Perform code reviews and establish processes to improve code quality Senior Big Data Engineer at Dream Games Ltd., İstanbul August 2020 — September 2021 • Design and implement Big Data architecture from scratch to collect game event data • Develop data ingestion pipelines using a Confluent Kafka Docker cluster managed via Kubernetes • Build a data lake on Google Cloud Storage • Set up a data warehouse using Google BigQuery • Collect marketing reports and raw data via APIs from Facebook, Google, AppLovin, Adjust, CrossInstall, IronSource, and Appsflyer Senior Big Data Developer | Cloudera at Bentego, İstanbul July 2019 — July 2020 • Design Big Data architecture using Cloudera Distribution based on customer requirements (e.g., DWH-to-Big Data migration projects in finance and telecom) • Develop Big Data ingestion and processing pipelines using Java, Scala, Spark, Kafka, Flume, Sqoop, Hive, and Impala • Build storage and ingestion layers with HBase, HDFS, Hive, Parquet, Avro, and Kafka • Provide support and maintenance for Cloudera Distribution clusters Big Data & Analytics Engineer at Nokia, İstanbul January 2017 — July 2019 • Implement the data platform for Nokia products using Cloudera Distribution • Develop Big Data ingestion and processing pipelines using Java, Scala, Spark, Kafka, Flume, and Sqoop • Generate reports using product-related data with Hive, Impala, and HBase (via Phoenix) • Provide support and maintenance for the Big Data cluster powering Nokia products DevOps Solutions Architect at Optiim, İstanbul June 2016 — January 2017 • • • • Design DevOps architecture based on customer requirements Implement end-to-end DevOps solutions Develop CI/CD pipelines using Java, Jenkins, and HP Codar Build custom release pipelines tailored to project needs Software Architect /Senior Software Consultant (International Projects) at Adesso Turkey, İstanbul December 2014 — June 2016 • Contributed to local and international software projects (Turkey, Germany, Switzerland) • Developed front-end and back-end applications as a Senior Software Engineer using Java 8, PrimeFaces, AngularJS, Bootstrap, and Spring Senior Risk and Fraud Solutions Developer at Avea, İstanbul November 2007 — December 2014 • Develop fraud detection applications using Java, JSF, and PrimeFaces • Design online rating algorithms and architecture for real-time fraud detection using in-memory event processing • Define effective dimensions for fraud detection scoring using SPSS Software Engineer at Turkcell, İstanbul September 2005 — November 2007 • Develop Customer Care problem and incident management applications (C#) • Support Call Center Application (AVAYA) • Deploy releases (IBM Websphere) EDUCATION Computer Engineering, Bahcesehir University, Istanbul February 2007 — June 2012 Master Degree Physics, Uludag University, Bursa November 1999 — March 2004 Bachelor degree