Principal, Software Engineer

* Build data systems that ingest, model, and analyze massive flow of data from online and offline user activities, processing hundreds of millions of sales and impressions data to obtain insights and analytics related to advertising campaign performance.
* Develop big data applications for precise audience targeting and cutting-edge measurement for campaign reporting, leveraging the wealth of data within the Walmart ecosystem.
* Set up ETL jobs in Airflow to move large volume of distributed data from various sources to secondary data centers for business continuity and disaster recovery.
* Troubleshoot business and production issues by gathering information (issue, impact, criticality, possible root cause), engage support teams to assist in resolution of issues, formulate an action plan, performing actions as designated in plan, interpret the results to determine further action, and complete online documentation.
* Develop complex software features to streamline and scale batch jobs to support advertising propensity models.
* Design, develop, and maintain software for the targeting and reporting data pipelines in Spark, Hadoop and Map-Reduce.
* Develop software using object-oriented languages such as Scala and Java. Implement advertising measurement systems that leverage machine learning and statistical techniques.
* Apply regression and classification machine learning methods in developing measurement products.
* Use Advanced big data scheduling techniques (Airflow) for reliable and recurrent data processing.
* Perform advanced data investigations using SQL and Spark or Hive.
* Have a good understanding of creating data as a product with knowledge on Java backend and Rest API/GraphQL
* Design and develop systems and methods for ensuring quality for large data pipelines and guide the product through all stages of user acceptance process.
* Experience programming in an object-oriented language (Java or Scala).
* Experience using Spark in batch jobs to process large scale data.
* 6+ years of software development experience, machine learning engineering or related field.
* Experience in creating and maintaining data processing workflows with tools including Airflow.
* Experience using Spark, Hive, or SQL to perform advanced data investigation.
* Experience implementing statistical and machine learning methods for data classification and regression.
* Experience developing techniques to ascertain correctness of data processing and transformation implementations using unit, integration, and end-to-end pipeline testing.
* Experience designing and developing software to perform ETL operations on large datasets.
* Experience building microservices.

For information about benefits and eligibility, see .Fifty years ago, Sam Walton started a single mom-and-pop shop and transformed it into the world's biggest retailer. Since those founding days, one thing has remained consistent: our commitment to helping our customers save money so they can live better. Today, we're reinventing the shopping experience and our associates are at the heart of it.

You'll play a crucial role in shaping the future of retail, improving millions of lives around the world.
* This is that place
* where your passions meet purpose. Join our family and create a career you're proud of.
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