(USA )Senior, Software Engineer - AdTech

Position Summary...

What you'll do...

The AdTech M&R data team is responsible to deliver reporting and measurement for Advertisers to analyze and optimize campaigns. We are a team of data developers whose strengths are: (1) building scalable data pipelines (2) exposure to machine learning techniques and data science (3) making sense of broadly defined problems through data analysis.

About Team: Walmart Global Tech
From entry-level to executive positions, Walmart provides limitless opportunities for growth, and career development. Walmart started small, with a single discount store and the simple philosophy of selling more for less. Today, we are a growing technology-enabled company founded on the same values as our first store. We establish clear expectations, empower associates to manage their work, and hold ourselves and one another to a high standard. Walmart's scale enables us to have an. No other company has the reach of Walmart, with 2.3 million associates worldwide and over 230 million weekly customers. Walmart is reshaping retail by investing in an expanding workforce. While technology is at the heart of our digital transformation, people are the reason we succeed and the force behind our innovations. We train our team in the skillsets of the future and bring in experts like you to help us grow.

What you'll 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 data investigations using SQL and Pig or Hive.
• Assist with the designs and development of systems and methods in order to ensure the quality for large data pipelines and guide the product through all stages of user acceptance process.

What you'll bring:

• Experience programming in an object-oriented language (Java or Scala).
• Experience using Hadoop and Map Reduce in batch jobs to