Karip Kaya, Developer in Buckhurst Hill, United Kingdom
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Karip Kaya

Verified Expert  in Engineering

Bio

Karip is a data engineer and developer with 18 years of experience in the IT industry and six years in the freelance community. He specializes in Java, Scala, and Python and is skilled at Hadoop, Spark, and PL/SQL. Karip enjoys working on the back end, database, and big data projects.

Portfolio

Atos
Apache Spark, Hadoop, PySpark, SQL, Databricks, Big Data Architecture...
Groupon
Big Data Architecture, Apache Spark, Java 8, Apache Maven, Git, SQL, Spark...
Deutsche Bank
Hadoop, Spark SQL, Pandas, PySpark, Apache Spark, HDFS, SQL, Scala, Python 3...

Experience

Java - 15 yearsSQL - 15 yearsHadoop - 5 yearsHDFS - 5 yearsSpark SQL - 3 yearsSpark - 3 yearsScala - 3 yearsPython 3 - 2 years

Availability

Part-time

Preferred Environment

Java, Scala, Python 3, SQL, Apache Hive, Spark, Databricks

The most amazing...

...thing I've developed is the messaging and file sharing program for desktop environments.

Work Experience

Senior Data Engineer

2021 - 2022
Atos
  • Reduced the 14 hours to run a Pandas-based data-transformation code into a PySpark DataFrame, running in five minutes.
  • Solved weekly pipeline data problems. Backloaded needed datasets.
  • Contributed to maintaining the weekly data flow based on Azure Data Factory.
Technologies: Apache Spark, Hadoop, PySpark, SQL, Databricks, Big Data Architecture, Azure Data Factory, HDFS, Java, Python 3, Spark, Spark SQL, Pandas, Python, Git, Databases, Data Engineering, ETL, Data Pipelines, Azure, Hadoop, GitHub, RDBMS

Senior Data Engineer

2021 - 2022
Groupon
  • Worked on cloud migration of an in-house Java API by using Docker.
  • Maintained the in-house data flow and the Linux crontab schedule maintenance.
  • Solved the cloud API timeout problem by changing an existing Java code.
  • Applied the CDC data flow function performance solution.
Technologies: Big Data Architecture, Apache Spark, Java 8, Apache Maven, Git, SQL, Spark, Spark SQL, HDFS, Python, Jenkins, PySpark, Databases, Data Engineering, ETL, Data Pipelines, Linux, Kubernetes, Hadoop, GitHub, RDBMS, Java Development Kit (JDK)

Data Engineer

2020 - 2021
Deutsche Bank
  • Created an initial data pipeline integration with Hive, Spark, Scala, and PySpark from scratch.
  • Solved file count limit problems with partitioning and bucketing Hive tables.
  • Contributed to designing the DWH database model established on Hive.
Technologies: Hadoop, Spark SQL, Pandas, PySpark, Apache Spark, HDFS, SQL, Scala, Python 3, Spark, Python, Big Data Architecture, Git, Databases, Data Engineering, ETL, Data Pipelines, Hadoop, GitHub, Bitbucket, RDBMS

Senior Data Engineer

2015 - 2019
Akbank
  • Created and maintained DWH tables and ETLs for existing data marts, including all staging level tables.
  • Developed and maintained ETLs on Informatica. Also enhanced the ETL performance by updating SQL and applying the push-down optimization.
  • Adapted an ETL offloading using a Big Data Cluster.
  • Built a near online sales/goals data mart to support daily sales.
  • Analyzed and reported data lineage using Informatica repository tables.
Technologies: Informatica ETL, Oracle Exadata, Big Data Architecture, Cloudera, Spark, SQL, Hadoop, Impala, Apache Sqoop, Apache Spark, Oracle, Databases, Data Migration, Data Engineering, ETL, Data Pipelines, ETL Development, Informatica, Hadoop, GitHub, RDBMS

Senior Developer

2003 - 2015
Yapi Kredi
  • Developed and maintained customer-related applications and database tables.
  • Migrated C-based client-side code into Java Hibernate.
  • Standardized and cleansed customer domain-specific data.
  • Transformed a domain-specific API from PL/SQL to Java-Spring.
Technologies: Oracle 11g, Oracle 12c, PL/SQL, Java, C, COBOL Batch, JCL, Git, Hibernate, Spring, SQL, Oracle, Databases, Data Migration, GitHub, RDBMS

Sudoku Validator

https://github.com/karipkaya/sudokuvalidator
A simple validator that checks the given sudoku solutions.

I wrote it in Java, generated tests, and used Maven for dependency management and building and running operations. The purpose was to demonstrate basic Java, Maven, and test knowledge.
JUNE 2023 - PRESENT

Python Basic

HackerRank

FEBRUARY 2023 - PRESENT

Problem Solving (Basic)

HackerRank

FEBRUARY 2023 - PRESENT

SQL (Advanced)

HackerRank

OCTOBER 2019 - PRESENT

Oracle Certified Associate

Oracle

Libraries/APIs

PySpark, Pandas

Tools

Spark SQL, Git, Informatica ETL, GitHub, Apache Maven, Oracle Exadata, Impala, CircleCI, Jenkins, JCL, Cloudera, Apache Sqoop, Bitbucket, Java Development Kit (JDK)

Languages

Java, SQL, Java 8, Scala, Python 3, Python, C

Frameworks

Spark, Apache Spark, Hadoop, Hibernate, Spring

Paradigms

ETL

Platforms

Oracle, Databricks, Azure, Linux, Kubernetes

Storage

Hadoop, HDFS, PL/SQL, Databases, Data Pipelines, RDBMS, Oracle 11g, Oracle 12c

Other

Big Data Architecture, Data Migration, Data Engineering, ETL Development, Informatica, Azure Data Factory, COBOL Batch, Algorithms

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