Java Backend Developer at Sunnyvale, CA -Need Only W2 and No H1'S

Hi

PFA below requirement and let me know your interested

Job title: Java Backend Developer
Location: Sunnyvale, CA

Duration: Contract

Client: CTS/Walmart.

Job Summary:

We are seeking a seasoned Java Backend Developer with strong expertise in Apache Spark to join our distributed systems team. The ideal candidate will design, build, and optimize scalable backend applications and data pipelines for real-time analytics and transactional systems.

Key Responsibilities:

• Design and develop backend microservices using Java 8+ and Spring Boot
• Build scalable, high-performance data processing pipelines using Apache Spark
• Ensure thread-safe and performant code using Java concurrency best practices
• Optimize Spark jobs: joins, transformations, data shuffles, partitioning strategies
• Develop unit/integration tests using JUnit, Mockito
• Work with event-driven systems using Kafka, SNS, SQS
• Implement CI/CD practices and manage infrastructure on AWS

Required Skills:

• Experience Java backend development experience
• Deep understanding of Java collections, memory models, concurrency, and design patterns
• Experience with Apache Spark (RDDs, DataFrames, Datasets, lazy evaluation)
• Proven ability to optimize joins, data writes (Kafka/DB), and transformations
• Strong knowledge of thread-safety, Singleton, and immutability patterns
• Familiarity with data partitioning techniques (coalesce vs repartition)
• Hands-on coding, debugging, and optimization skills
• Experience with distributed systems architecture and cloud environments (AWS preferred)

Preferred Qualifications:

• Experience with real-time data processing and financial/risk data pipelines
• Exposure to Splunk, CI/CD tools, containerization (Docker/Kubernetes)

Looking forward to hear and work with you soon

Thanks & Regards

Ashok Reddy

Sr US IT Recruiter

SAR TECH LLC