Staff Backend Engineer
HybridBengaluru, Karnataka, India
Job Summary
Design and build scalable, reliable Tier-1 services for order planning, fulfilment optimization, inventory allocation, and network cost management that process every Coupang order in real time across Korea and Taiwan. Own architecture across distributed systems involving gRPC service meshes, Kafka event pipelines, CPLEX optimization solvers, and multi-region deployments while writing production code in Kotlin and Java. Lead design and code reviews to identify correctness issues, scalability risks, and operational gaps in latency-sensitive order flows, driving reliability through circuit breakers, graceful degradation, and observability. Partner with Product, Data Science, and Operations to translate fulfilment goals into technical execution for PDD rationalization, CFCC transport planning, and solver model improvements. Mentor engineers and create durable technical mechanisms that scale beyond individual projects.
Required Qualifications
- 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 (backend systems at scale)
- Deep understanding of system design — API design, concurrency, data modelling, caching strategies, messaging, service-to-service communication (gRPC, REST)
- Strong code review skills — ability to identify subtle correctness, performance, and reliability issues in complex codebases
- Experience with production-grade systems handling high QPS, large data volumes, or Tier-1 SLAs
- Experience with event-driven architectures using Kafka at scale
- Experience with multi-region systems — region-specific routing, data isolation, cross-border fulfilment
- Experience with resilience engineering — circuit breakers, retry strategies, load testing, capacity planning, graceful degradation patterns
- Track record of technical leadership — setting architecture direction, driving cross-team alignment, mentoring senior engineers
Desired Qualifications
- Experience in ecommerce, fulfilment, supply chain, logistics, inventory, order management, or planning systems
- Experience with optimization systems — solvers (CPLEX, OR-Tools), decision engines, constraint programming, or data-science-integrated production systems
- Experience with Agentic AI tools for development and code review — using AI-assisted coding agents (e.g., Cursor, Copilot, Devin, Claude Code) to accelerate development velocity, improve code review quality, and automate repetitive engineering tasks
- Experience with Spec-Driven Development — defining system behaviour through specifications (OpenAPI/Swagger, Protocol Buffers, API-first design, contract-first development) before implementation, ensuring well-defined contracts between services
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