Senior Backend Engineer - Recommendation Systems (Contractor)

Backend Developer

Join OPPO US Research Center's core team to develop and optimize backend services for high-traffic products (App Store, Global Search, Game Center). You'll build scalable, reliable systems that serve millions of daily users.

Key Responsibilities:

Design and implement backend services for recommendation and search with a focus on low latency and high availability.

Implement multi-level caching and optimize data access patterns.

Build, monitor and tune data pipelines and indices using Redis, Elasticsearch, and Kafka.

Develop production-quality Java services using Spring / Spring Boot and collaborate on deployments and incident response.

Work cross-functionally with MLE, product, SRE, and data teams to deliver features and improvements.