(USA) Senior, Software Engineer

Position Summary...

What you'll do...

There are millions of customers shop on Walmart websites and in stores daily, and advertising helps advertisers bring the best products to our customers. If you want to influence millions of customers on their shopping journeys, we have a role for you. This team in advertising serves as the horizontal data foundation for various applications. We build extremely large-scale data sets, process them using distributed system and enrich them with intelligent insights.

What You will do :

• 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 Jenkins to move large volume of distributed data from various sources to secondary datacenters for business continuity and disaster recovery.
• Participate in small to large sized projects by reviewing project requirements into technical solutions; gather requested information (for example, design documents, product requirements, wire frames); write and develop code; conduct unit testing; communicate status and issues to team members and stakeholders; collaborate with project team and cross functional teams; troubleshoot open issues and bug-fixes; and ensure on-time delivery and hand-offs.
• Troubleshoot business and production issues by gathering information (for example, 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 (Jenkins, Airflow) for reliable and recurrent data processing.
• Perform advanced data investigations using SQL and Pig or Hive.
• Design and develop systems and methods for ensuring quality for large data pipelines and guide the product through all stages of user acceptance process.

What you will bring:

• 3; Years of Experience programming in an object-oriented language (Java or Scala).
• Experience using Hadoop and Map Reduce in batch jobs to process large scale data.
• Experience in creating and maintaining data processing workflows with tools including Airflow or Oozie.
• Experience using Pig, Hive, or SQL to perform advanced data investigation.
• Experience implementing statistical and machine learning methods for data classification and regression.
• Experience working in AdTech with demonstrated knowledge of the AdTech business.
• 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.

About Walmart Global Tech
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