Senior, Software Engineer (Java)

Company Description

Walmart Global Tech is at the forefront of AI innovation, leveraging cutting-edge technologies to redefine customer experiences. We are seeking a Senior Machine Learning Engineer with deep expertise in Generative AI , LLMs , and scalable system design to drive impactful solutions.

Job Description

As a Senior Backend Software Engineer on Walmart’s Pricing team, you will lead the design and development of large-scale backend event-driven systems leveraging GenAI LLMs, machine learning, Cassandra, Kafka, Apache Spark, and GCP. You’ll architect scalable solutions to power pricing systems, mentor engineers, and drive innovation that impacts millions of customers. Your work will directly impact millions of Walmart customers and associates by ensuring competitive, accurate, and timely prices across our online and store channels.

Key Responsibilities :

Architect, design, and implement complex backend systems for pricing services using Java and Python (Kotlin experience is a plus)

Lead integration of GenAI LLMs and machine learning models into backend services

Design and optimize data storage with Cassandra, data streaming with Kafka, and large-scale processing with Apache Spark

Develop and manage big data ETL jobs

Implement and maintain monitoring and visualization dashboards with Grafana

Mentor and guide junior engineers; lead technical discussions and reviews

Collaborate with data scientists, ML engineers, and product managers to deliver pricing solutions

Ensure best practices in code quality, testing, and documentation

Drive continuous improvement in system performance, scalability, and reliability

Qualifications

• Bachelor’s or Master’s degree in Computer Science or related field

5+ years of backend development experience

Deep expertise in Java; experience with Kotlin is a plus, strong Python skills preferred

Experience with Cassandra (or similar distributed NoSQL databases)

Experience with Kafka (or similar messaging / streaming platforms)

Experience designing and building large-scale distributed systems

Proficiency with RESTful APIs and microservices

Experience integrating machine learning models and / or GenAI LLMs into production preferred

Experience with Apache Spark for big data processing preferred

Hands-on experience with GCP (Google Cloud Platform) preferred

Experience with monitoring / observability tools such as Grafana preferred

Excellent leadership, communication, and problem-solving skills

You’ll sweep us off our feet if…

You have experience leading technical design discussions and mentoring junior engineers

You have a strong sense of ownership and focus on delivering business impact

You are passionate about performance, scalability, and reliability at massive scale

You thrive in fast-paced, agile environments and enjoy solving hard technical problems

Additional Information

All your information will be kept confidential according to EEO guidelines.