Senior Staff Backend Engineer – Fraud Detection

About the role

Coupang’s Risk, Fraud & Trust Engineering organization is building next‑generation platforms that protect the marketplace ecosystem. As a Senior Staff Backend Engineer you will lead the architecture and development of large‑scale, ML‑powered data platforms that enable real‑time fraud detection and risk evaluation.

Key responsibilities

• Lead architecture, design, and development of scalable data and ML infrastructure for fraud detection.
• Build and optimize large‑scale batch and real‑time data pipelines with low latency and high reliability.
• Own end‑to‑end productionization of machine‑learning models, ensuring performance and scalability.
• Partner with data scientists and engineering teams to translate modeling requirements into robust engineering solutions.
• Define long‑term technical vision and roadmap for data processing and fraud detection platforms.

Required profile

• 13+ years of experience in backend, data engineering, or large‑scale distributed systems.
• Strong experience building real‑time distributed data processing systems.
• Hands‑on experience with streaming technologies such as Apache Flink, Kafka, or Spark Streaming.
• Proficiency in Java‑based backend development and distributed system architecture.
• Experience deploying, scaling, and optimizing machine‑learning models in production.

Required skills

• Apache Flink
• Kafka
• Spark Streaming
• Java
• Distributed systems design
• Machine‑learning model deployment
• System design for scalability and fault tolerance
• Cloud‑native architectures and containerization
• GenAI tools for software development