Staff Back end Engineer L6

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Staff Back end Engineer L6 in Others new

Coupang
Full time
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Others
10/30/2026
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Shanghai, China

Responsibilities

Design and develop large-scale distributed backend services using Java or Python.
Lead the architecture and core implementation of LLM- and multimodal-model-based multi-agent systems.
Build long-running hosted agents, sandbox execution environments, layered context management, persistent storage, and function-calling orchestration.
Deliver complex Agent and RAG systems from solution design through production deployment.
Translate advances in memory, long context, planning, tool use, model serving, and self-harness into production systems.
Contribute to GenAI video creative, AI operations, ranking improvement, and AI-native SDLC platforms.

Requirements

Strong theoretical and practical experience developing and deploying large-scale distributed backend systems.
Proficiency in Java or Python and understanding of asynchronous processing, concurrency, idempotency, rate limiting, code quality, and maintainability.
Knowledge and practical understanding of large-model architecture, attention mechanisms, MoE, model serving, and current LLM technologies.
Hands-on experience designing and delivering multi-agent, Agent, or RAG systems in production; self-harness experience is preferred.
Familiarity with at least one agent-development framework, including LangChain, LangGraph, Deerflow, Claude Code, or Hermes.
Strong software architecture and design-pattern skills, with some ability to understand or work with open-source framework source code.
Computer science, mathematics, physics, electronics, or a related technical background is preferred.
Strong learning ability, structured problem-solving skills, and the ability to independently deliver business results.

Coupang

Coupang is a technology and Fortune 150 company listed on the New York Stock Exchange (NYSE: CPNG) that provides retail, restaurant delivery, video streaming, and fintech services to customers around the world under brands that include Coupang, Eats, Play, Rocket Now, and Farfetch.

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