Data Engineer Big

AJITH KUMAR REDDY

DATA ENGINEER

945-***-**** *****.*.*******@*****.*** Columbus, OH 43240

SUMMARY:

●Over 5+ years of experience as a Data Engineer with expertise in designing data intensive applications using Hadoop Ecosystem, Big Data Analytical, Cloud Data engineering, Data Warehouse / Data Mart, Data Visualization, Reporting, and Data Quality solutions.

●In - depth knowledge of Hadoop architecture and its components like YARN, HDFS, Name Node, Data Node, Job Tracker, Application Master, Resource Manager, Task Tracker and MapReduce programming paradigm.

●Extensive experience in Hadoop led development of enterprise level solutions utilizing Hadoop components such as Apache Spark, MapReduce, HDFS, Sqoop, PIG, Hive, HBase, Oozie, Flume, NiFi, Kafka, Zookeeper, and YARN.

●Profound experience in performing Data Ingestion, Data Processing (Transformations, enrichment, and aggregations). Strong Knowledge on Architecture of Distributed systems and Parallel processing, In-depth understanding of MapReduce programming paradigm and Spark execution framework.

●Experienced with Spark improving the performance and optimization of the existing algorithms in Hadoop using Spark Context, Spark-SQL, Dataframe API, Spark Streaming, MLlib, Pair RDD 's and worked explicitly on PySpark and Scala.

●Handled ingestion of data from different data sources into HDFS using Sqoop, Flume and perform transformations using Hive, Map Reduce and then loading data into HDFS. Managed Sqoop jobs with incremental load to populate HIVE external tables. Experience in importing streaming data into HDFS using Flume sources, and Flume sinks and transforming the data using Flume interceptors.

●Experience in Oozie and workflow scheduler to manage Hadoop jobs by Direct Acyclic Graph (DAG) of actions with control flows.

●Implemented the security requirements for Hadoop and integrating with Kerberos authentication infrastructure- KDC server setup, creating realm /domain, managing.

●Experience of Partitions, bucketing concepts in Hive and designed both Managed and External tables in Hive to optimize performance. Experience with different file formats like Avro, parquet, ORC, Json and XML.

●Expertise in Creating, Debugging, Scheduling and Monitoring jobs using Airflow and Oozie. Experienced with using most common Operators in Airflow - Python Operator, Bash Operator, Google Cloud Storage Download Operator, Google Cloud Storage Object Sensor, GoogleCloudStorageToS3Operator.

●Hands-on experience in handling database issues and connections with SQL and NoSQL databases such as MongoDB, HBase, Cassandra, SQL server, and PostgreSQL. Created Java apps to handle data in MongoDB and HBase. Used Phoenix to create SQL layers on HBase.

●Experience in designing and creating RDBMS Tables, Views, User Created Data Types, Indexes, Stored Procedures, Cursors, Triggers and Transactions.

●Expert in designing ETL data flows using creating mappings/workflows to extract data from SQL Server and Data Migration and Transformation from Oracle/Access/Excel Sheets using SQL Server SSIS.

●Expert in designing Parallel jobs using various stages like Join, Merge, Lookup, remove duplicates, Filter, Dataset, Lookup file set, Complex flat file, Modify, Aggregator, XML.

●Hands-on experience with Amazon EC2, Amazon S3, Amazon RDS, VPC, IAM, Amazon Elastic Load Balancing, Auto Scaling, CloudWatch, SNS, SES, SQS, Lambda, EMR and other services of the AWS family.

●Created and configured a new batch job in Denodo scheduler with email notification capabilities and Implemented Cluster setting for multiple Denodo node and created load balance for improving performance activity.

●Instantiated, created, and maintained CI/CD (continuous integration & deployment) pipelines and applied automation to environments and applications. Worked on various automation tools like GIT, Terraform, Ansible.

●Experienced in fact dimensional modeling (Star schema, Snowflake schema), transactional modeling and SCD (Slowly changing dimension)

●Experienced with JSON based RESTful web services, and XML/QML based SOAP web services and also worked on various applications using python integrated IDEs like Sublime Text and PyCharm .

●Developed web-based applications using Python, DJANGO, QT, C++, XML, CSS3, HTML5, DHTML, JavaScript and jQuery.

●Experience in using various packages in python like ggplot2, caret, dplyr, Rweka, gmodels, RCurl, tm, C50, twitteR, NLP, Reshape2, rjson, plyr, pandas, numpy, seaborn, scipy, matplotlib, scikit-learn, Beautiful Soup, Rpy2, SQLAlchemy, PyQT, PyTest

●Building and productionizing predictive models on large datasets by utilizing advanced statistical modeling, machine learning, or other data mining techniques.

●Developed intricate algorithms based on deep-dive statistical analysis and predictive data modeling that were used to deepen relationships, strengthen longevity and personalize interactions with customers.

TECHNICAL SKILLS

●Big Data Technologies: Hadoop, MapReduce, HDFS, Sqoop, PIG, Hive, HBase, Oozie, Flume, NiFi, Kafka, Zookeeper, Yarn, Apache Spark, Mahout, Sparklib

●Databases: Oracle, MySQL, SQL Server, MongoDB, Cassandra, DynamoDB, PostgreSQL, Teradata, Cosmos.

●Programming: Python, PySpark, Scala, Java, C, C++, Shell script, Perl script, SQL

●Cloud Technologies: AWS, Microsoft Azure

●Frameworks: Django REST framework, MVC, Hortonworks

●Tools: PyCharm, Eclipse, Visual Studio, SQL*Plus, SQL Developer, TOAD, SQL Navigator, Query Analyzer, SQL Server Management Studio, SQL Assistance, Eclipse, Postman

●Versioning tools: SVN, Git, GitHub

●Operating Systems: Windows 7/8/XP/2008/2012, Ubuntu Linux, MacOS

●Network Security: Kerberos

●Database Modelling: Dimension Modeling, ER Modeling, Star Schema Modeling, Snowflake Modeling

●Monitoring Tool: Apache Airflow

●Visualization/ Reporting: Tableau, ggplot2, matplotlib, SSRS, Power BI

●Machine Learning Techniques: Linear & Logistic Regression, Classification and Regression Trees, Random Forest, Associative rules, NLP and Clustering.

PROFESSIONAL EXPERIENCE:

AWS Data Engineer

Trimble, Westminster, CO

August 2023 – Present

●Designed and set up Enterprise Data Lake to provide support for various use cases including Analytics, processing, storing and Reporting of voluminous, rapidly changing data.

●Responsible for maintaining quality reference data in source by performing operations such as cleaning, transformation and ensuring Integrity in a relational environment by working closely with the stakeholders & solution architect.

●Designed and developed Security Framework to provide fine grained access to objects in AWS S3 using AWS Lambda, DynamoDB.

●Set up and worked on Kerberos authentication principals to establish secure network communication on cluster and testing of HDFS, Hive, Pig and MapReduce to access cluster for new users.

●Performed end- to-end Architecture & implementation assessment of various AWS services like Amazon EMR, Redshift, S3.

●Implemented the machine learning algorithms using python to predict the quantity a user might want to order for a specific item so we can automatically suggest using kinesis firehose and S3 data lake.

●Used AWS EMR to transform and move large amounts of data into and out of other AWS data stores and databases, such as Amazon Simple Storage Service (Amazon S3) and Amazon DynamoDB.

●Used Spark SQL for Scala & Python interface that automatically converts RDD case classes to schema RDD.

●Import the data from different sources like HDFS/HBase into Spark RDD and perform computations using PySpark to generate the output response.

●Creating Lambda functions with Boto3 to deregister unused AMIs in all application regions to reduce the cost for EC2 resources.

●Importing & exporting database using SQL Server Integrations Services (SSIS) and Data Transformation Services (DTS Packages).

●Coded Teradata BTEQ scripts to load, transform data, fix defects like SCD 2 date chaining, cleaning up duplicates.

●Developed reusable framework to be leveraged for future migrations that automates ETL from RDBMS systems to the Data Lake utilizing Spark Data Sources and Hive data objects.

●Conducted Data blending, Data preparation using Alteryx and SQL for Tableau consumption and publishing data sources to Tableau server.

●Developed Kibana Dashboards based on the Log stash data and Integrated different source and target systems into Elasticsearch for near real time log analysis of monitoring End to End transactions.

●Implemented AWS Step Functions to automate and orchestrate the Amazon SageMaker related tasks such as publishing data to S3, training ML model and deploying it for prediction.

●Integrated Apache Airflow with AWS to monitor multi-stage ML workflows with the tasks running on Amazon SageMaker.

Environment: AWS EMR, S3, RDS, Redshift, Lambda, Boto3, DynamoDB, Amazon SageMaker, Apache Spark, HBase,

Apache Kafka, HIVE, SQOOP, Map Reduce, Snowflake, Apache Pig, Python, SSRS, Tableau

Azure Data Engineer

Optum, India

May 2020 – Oct 2021

Worked on Azure Data Factory to integrate data of both on-prem (MY SQL, Cassandra) and cloud (Blob storage, Azure SQL DB) and applied transformations to load back to Azure Synapse.

Managed, Configured and scheduled resources across the cluster using Azure Kubernetes Service.

Monitored Spark cluster using Log Analytics and Ambari Web UI. Transitioned log storage from Cassandra to Azure SQL Data warehouse and improved the query performance.

Involved in developing data ingestion pipelines on Azure HDInsight Spark cluster using Azure Data Factory and Spark SQL. Also Worked with Cosmos DB (SQL API and Mongo API).

Develop dashboards and visualizations to help business users analyze data as well as providing data insight to upper management with a focus on Microsoft products like SQL Server Reporting Services (SSRS) and Power BI.

Performed the migration of large data sets to Databricks (Spark), created and administer cluster, load data, configure data pipelines, loading data from ADLS Gen2 to Databricks using ADF pipelines.

Created various pipelines to load the data from Azure data lake into Staging SQLDB and followed by to Azure SQL DB

Created Databrick notebooks to streamline and curate the data for various business use cases and also mounted blob storage on Databrick.

Utilized Azure Logic Apps to build workflows to schedule and automate batch jobs by integrating apps, ADF pipelines, and other services like HTTP requests, email triggers etc.

Worked extensively on Azure data factory including data transformations, Integration Runtimes, Azure Key Vaults, Triggers and migrating data factory pipelines to higher environments using ARM Templates.

Ingested data in mini-batches and performs RDD transformations on those mini-batches of data by using Spark Streaming to perform streaming analytics in Data bricks.

Environment: Azure SQL DW, Databrick, Azure Synapse, Cosmos DB, ADF, SSRS, Power BI, Azure Data lake, ARM,

Azure HDInsight, Blob storage, Apache Spark.

Environment: Azure, AWS, Apache Hive, Hbase, PySpark, python, Agile, Snowflake, Stream sets, Bitbucket, Cloudera, Shell Scripting, UNIX, Amazon S3, PyCharm, Jenkins, Scala, Java.

Big Data Engineer/ Hadoop Developer

Wells Fargo, India

June 2018 – April 2020

●Interacted with business partners, Business Analysts and product owners to understand requirements and build scalable distributed data solutions using Hadoop ecosystem.

●Developed Spark Streaming programs to process near real time data from Kafka, and process data with both stateless and state full transformations.

●Worked with HIVE data warehouse infrastructure-creating tables, data distribution by implementing partitioning and bucketing, writing and optimizing the HQL queries.

●Built and implemented automated procedures to split large files into smaller batches of data to facilitate FTP transfer which reduced 60% of execution time.

●Worked on developing ETL processes (Data Stage Open Studio) to load data from multiple data sources to HDFS using FLUME and SQOOP, and performed structural modifications using Map Reduce, HIVE.

●Developing Spark scripts, UDFS using both Spark DSL and Spark SQL query for data aggregation, querying, and writing data back into RDBMS through Sqoop.

●Written multiple MapReduce Jobs using Java API, Pig and Hive for data extraction, transformation and aggregation from multiple file formats including Parquet, Avro, XML, JSON, CSV, ORCFILE and other compressed file formats Codecs like gZip, Snappy, Lzo.

●Strong understanding of Partitioning, bucketing concepts in Hive and designed both Managed and External tables in Hive to optimize performance.

●Developed PIG UDFs for manipulating the data according to Business Requirements and also worked on developing custom PIG Loaders.

●Developing ETL pipelines in and out of data warehouses using a combination of Python and Snowflakes SnowSQL Writing SQL queries against Snowflake.

●Experience in report writing using SQL Server Reporting Services (SSRS) and creating various types of reports like drill down, Parameterized, Cascading, Conditional, Table, Matrix, Chart and Sub Reports.

●Used DataStax Spark connector which is used to store the data into Cassandra database or get the data from Cassandra database.

●Wrote oozie scripts and set up workflow using Apache Oozie workflow engine for managing and scheduling Hadoop jobs.

●Worked on implementation of a log producer in Scala that watches for application logs, transforms incremental logs and sends them to a Kafka and Zookeeper based log collection platform.

●Used Hive to analyze data ingested into HBase by using Hive-HBase integration and compute various metrics for reporting on the dashboard.

●Transformed the data using AWS Glue dynamic frames with PySpark; cataloged the transformed the data using Crawlers and scheduled the job and crawler using workflow feature

●Worked on installing cluster, commissioning & decommissioning of data node, name node recovery, capacity planning, and slots configuration.

●Developed data pipeline programs with Spark Scala APIs, data aggregations with Hive, and formatting data (JSON) for visualization, and generating.

Environment: AWS, Cassandra, PySpark, Apache Spark, HBase, Apache Kafka, HIVE, SQOOP, FLUME, Apache oozie,

Zookeeper, ETL, UDF, Map Reduce, Snowflake, Apache Pig, Python, Java, SSRS

EDUCATION:

Master's Degree in Information Science from Trine University

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