2 months ago
Responsibilities
- Design and build scalable, reliable Tier-1 services for order planning, fulfilment optimization, inventory allocation, and network cost management that process every order in real time.
- Own architecture across distributed systems involving gRPC service meshes, Kafka event pipelines, CPLEX optimization solvers, multi-layer caching, S3-backed Loadable Stores, and multi-region deployments.
- Write and review production Kotlin and Java code while setting standards for correctness, performance, and operational safety.
- Lead design and code reviews, identifying correctness issues, scalability risks, and operational gaps in latency-sensitive order flows.
- Drive reliability through circuit breakers, graceful degradation, fallback strategies, observability, and incident prevention.
- Partner with Product, Data Science, and Operations on fulfilment optimization initiatives including PDD rationalization, CFCC, CFlow transport planning, inventory group management, and solver model improvements.
- Mentor engineers and create reusable technical mechanisms such as pipeline patterns, adapter abstractions, and feature-flag discipline.
Requirements
- 10+ years of experience designing and operating high-scale distributed systems with strict latency and reliability requirements.
- Excellent hands-on coding ability in Kotlin or Java for backend systems at scale.
- Deep understanding of system design, including API design, concurrency, data modelling, caching strategies, messaging, and service-to-service communication using gRPC and REST.
- Strong code review skills and the ability to identify correctness, performance, and reliability issues in complex codebases.
- Experience operating production-grade systems with high QPS, large data volumes, or Tier-1 SLAs.
- Experience with event-driven architectures using Kafka at scale.
- Experience with multi-region systems, including region-specific routing, data isolation, and cross-border fulfilment.
- Experience with resilience engineering, including circuit breakers, retry strategies, load testing, capacity planning, and graceful degradation.
- Track record of technical leadership through setting architecture direction, driving cross-team alignment, and mentoring senior engineers.
- Preferred experience in ecommerce, fulfilment, supply chain, logistics, inventory, order management, or planning systems.
- Preferred experience with optimization systems such as CPLEX, OR-Tools, decision engines, constraint programming, or data-science-integrated production systems.
- Preferred experience using Agentic AI development and code-review tools such as Cursor, Copilot, Devin, or Claude Code.
- Preferred experience with Spec-Driven Development and technologies such as OpenAPI/Swagger and Protocol Buffers.
Benefits
- Hybrid work model.
- Eligible recipients of veteran’s benefits, people with disabilities, and others covered by employment protection laws may receive preferential treatment in accordance with applicable laws.
Tech Stack
Categories
About 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.