Coupang

Senior Staff Backend Engineer

Coupang
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2 months ago
Bengaluru, IndiaStaff+

Responsibilities

  • Design and build scalable Tier-1 services for order planning, fulfillment optimization, inventory allocation, and network cost management.
  • Own architecture for distributed systems using gRPC service meshes, Kafka pipelines, optimization solvers, caching, and multi-region deployments.
  • Write and review production Kotlin and Java code for high-volume, latency-sensitive backend systems.
  • Lead design and code reviews focused on correctness, scalability, performance, reliability, and operational safety.
  • Drive resilience through circuit breakers, graceful degradation, observability, incident prevention, and capacity planning.
  • Partner with Product, Data Science, and Operations on fulfillment optimization, inventory, transportation, and solver improvements.
  • Mentor engineers and establish reusable technical mechanisms, pipeline patterns, adapter abstractions, and feature-flag discipline.

Requirements

  • Proven 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 API design, concurrency, data modeling, caching, messaging, and service-to-service communication.
  • Strong code review skills and the ability to identify correctness, performance, and reliability issues in complex codebases.
  • Experience operating production systems with high QPS, large data volumes, or Tier-1 SLAs.
  • Experience with Kafka-based event-driven architectures at scale and multi-region systems.
  • Experience with resilience engineering, including circuit breakers, retries, load testing, capacity planning, and graceful degradation.
  • Track record of technical leadership, architecture ownership, cross-team alignment, and mentoring senior engineers.
  • Preferred experience in ecommerce, fulfillment, supply chain, logistics, inventory, order management, or planning systems.
  • Preferred experience with CPLEX, OR-Tools, decision engines, constraint programming, or production systems integrated with data science.
  • Preferred experience using Cursor, Copilot, Devin, or Claude Code for development and code review.
  • Preferred experience with specification-driven development using OpenAPI, Swagger, Protocol Buffers, API-first design, or contract-first development.

Benefits

  • Hybrid work model.
  • Employment protections and legally applicable preferential treatment may apply to eligible veterans, disabled individuals, and others.

Tech Stack

Apache CassandraApache KafkaElasticsearchgRPCJavaKotlinPythonRedisSpring Boot

Categories

Coupang

About Coupang

5,001-10,000 employees

Coupang builds and operates a South Korea–focused e-commerce marketplace with an end-to-end logistics network (Rocket Delivery), plus food delivery, video streaming, and fintech under brands such as Coupang, Eats, and Play. Revenue comes from first-party retail, third-party marketplace services, advertising, and memberships (Rocket WOW). Founded in 2010, the company is headquartered in Seattle and is publicly listed on the NYSE (CPNG).

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