---
title: 'Staff Backend Engineer at Coupang'
canonical: 'https://feeny.ai/job/staff-backend-engineer-coupang-bengaluru-pz9wxm7gcvqk'
type: 'job'
last_seen: '2026-09-11'
---

# Staff Backend Engineer at Coupang

- **Company:** Coupang
- **Location:** Bengaluru, India
- **Posted:** 2026-07-31
- **Last confirmed live:** 2026-09-11
- **Apply:** https://www.coupang.jobs/en/jobs/?gh_jid=8098140

## Job description

Company Introduction We exist to wow our customers. We know we’re doing the right thing when we hear our customers say, “How did I ever live without Coupang?” Born out of an obsession to make shopping, eating, and living easier than ever, we’re collectively disrupting the multi-billion-dollar e-commerce industry from the ground up. We are one of the fastest-growing e-commerce companies that established an unparalleled reputation for being a dominant and reliable force in South Korean commerce. We are proud to have the best of both worlds — a startup culture with the resources of a large global public company. This fuels us to continue our growth and launch new services at the speed we have been since our inception. We are all entrepreneurs surrounded by opportunities to drive new initiatives and innovations. At our core, we are bold and ambitious people that like to get our hands dirty and make a hands-on impact. At Coupang, you will see yourself, your colleagues, your team, and the company grow every day. Our mission to build the future of commerce is real. We push the boundaries of what’s possible to solve problems and break traditional trade-offs. Join Coupang now to create an epic experience in this always-on, high-tech, and hyper-connected world.

## Role Overview

Fulfilment Optimization (FO) owns the systems that decide how every Coupang order is planned, distributed, and fulfilled. Our Tier-1 services sit on the critical path of Coupang's ecommerce order flow — processing every order in real time across Korea and Taiwan. We operate multiple interconnected platform components: -Business Engine — Core order planning and distribution orchestrator (Kotlin/Spring Boot). Runs 5 distinct pipelines (Domestic, Cross-Market, 3PL, PDD, Replan) using a hexagonal architecture with pluggable processors, pruners, and manifest-based orchestration. -Planner Solver — Mixed-Integer Programming (MIP) optimization engine (Python/CPLEX) that minimizes total fulfilment cost across inventory, capacity, network, and delivery-promise constraints with sub-second latency requirements. -Network Manager — Manages fulfilment network topology, transportation cost, FC capacity, middle-mile logistics, and cross-FC consolidation (CFCC) across 90+ REST/gRPC endpoints. -FO Inventory — Real-time inventory availability, allocation, SKU management, and event-driven sync across multiple upstream sources (Kafka, Cassandra, Elasticsearch, Redis). -WMS Fulfilment — Order distribution, inventory allocation, fulfilment centre orchestration, shipment, delivery, and outbound management (Java/Spring, 138+ domain subpackages, Drools rules engine). -Online Simulation — Real-time simulation platform for testing planning changes against production-like order streams. -FO Workflows — Temporal-based workflow orchestration for long-running fulfilment processes.

## The Role

We are looking for a Senior Staff Engineer who can operate across deep implementation and broad architecture. You will set the technical direction for Tier-1 fulfilment systems, write and review production code, design systems that scale under heavy ecommerce traffic, and raise the engineering bar across the organization. The engineer in this role will directly influence how millions of orders are fulfilled every day. Every architectural decision — solver latency, pruning strategy, network cost calculation, inventory allocation algorithm impacts customer delivery promise, fulfilment cost, and operational efficiency across Coupang's entire ecommerce platform in Korea and Taiwan. This is a rare opportunity to work at the intersection of large-scale distributed systems, real-time optimization, and ecommerce fulfilment — with direct, measurable business impact.

## What You Will Do

-Design and build scalable, reliable Tier-1 services for order planning, fulfilment optimization, inventory allocation, and network cost management — systems that process every Coupang order in real time. -Own architecture across distributed systems involving gRPC service meshes, Kafka event pipelines, CPLEX optimization solvers, multi-layer caching (Redis, S3-backed Loadable Stores), and multi-region deployments. -Write production code in Kotlin and Java and set the bar for correctness, performance, and operational safety across the team. -Lead design and code reviews — identify correctness issues, scalability risks, and operational gaps in systems handling latency-sensitive order flows (sub-second solver deadlines, P99 monitoring with 3-5s alert thresholds). -Drive reliability for mission-critical services — circuit breakers, graceful degradation (hard/soft pruners with fallback), observability, and incident prevention. -Partner with Product, Data Science, and Operations to translate fulfilment optimization goals into technical execution — PDD rationalization, CFCC (Cross-FC Consolidation), CFlow transport planning, inventory group management, and solver model improvements. -Mentor engineers and create durable technical mechanisms (pipeline patterns, adapter abstractions, feature flag discipline) that scale beyond individual projects

## Basic Qualifications

-Proven 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

## Preferred 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

Type of work model

- Hybrid

Details to consider

- Those eligible for employment protection (recipients of veteran’s benefits, the disabled, etc.) may receive preferential treatment for employment in accordance with applicable laws. Privacy Notice
- Your personal information will be collected and managed by Coupang as stated in the Application Privacy Notice located below. https://privacy.coupang.com/en/land/jobs/

## About Coupang

## Company Overview
- **One-liner**: Coupang is a global technology and Fortune 150 company that reimagines commerce by integrating e-commerce, logistics, last-mile delivery, restaurant delivery, video streaming, and fintech services to wow customers.
- **Entity Type**: Public (NYSE: CPNG)
- **Headquarters**: Seattle, Washington, USA (global HQ); operates major hubs in Seoul, South Korea, and other locations.
- **Founded**: 2010
- **Founders**: Bom Kim (Bong-Seok Kim)

## Core Business
- **Primary industry/industries**: E-commerce, Logistics & Fulfillment, Retail, Food Delivery, Fintech, Content Streaming, AI-driven Commerce.
- **Target customers**: B2C (primarily consumers in South Korea, with growing global operations including Taiwan, Singapore, and the U.S.).
- **Mission or purpose statement**: "We exist to wow our customers. We know we’re doing the right thing when we hear our customers say, 'How did I ever live without Coupang?'"

## Products & Services
- **[Coupang (Rocket Delivery)](#)**: Core e-commerce platform offering millions of products with over 99% of orders delivered same or next day via a proprietary logistics network. Includes Rocket Fresh (groceries) and Rocket Now (ultra-fast delivery).
- **[Coupang Eats](#)**: Restaurant food delivery service.
- **[Coupang Play](#)**: Video streaming service (original content, sports, and licensed shows).
- **[Farfetch](#)**: Global luxury fashion platform acquired by Coupang.
- **[Coupang Fintech](#)**: Payment and financial services (e.g., Coupang Pay, credit card partnerships).
- **[Coupang Logistics & Fulfillment Services](#)**: End-to-end logistics for third-party sellers and brands.
- **[Rocket Growth](#)**: SaaS-like tools and services for sellers/suppliers to manage inventory, analytics, and advertising.

## Market Standing
- **Valuation/Market Cap**: ~$25.8 billion (as of mid-2026) [LinkedIn].
- **Key Metric**: Annual Revenue of **$34.5 billion** (most recent fiscal year) [LinkedIn].
- **Notable Investors/Partners**: Publicly traded on NYSE (institutional investors include SoftBank, BlackRock, Fidelity, and others). Key partners include major global brands and local Korean suppliers.
- **Growth Signals**: 
    - Ranked **#132 on the 2026 Fortune 500**, jumping significantly [investor relations].
    - Rapid AI-driven global commerce expansion (e.g., Taiwan, Singapore, and U.S. tech hubs).
    - 5,940 employees (linkedIn data, with monthly headcount growth of +1.1% and quarterly job posting growth of +154.2%).

## Competitive Advantages
- **Fully Integrated Infrastructure**: Coupang owns and operates over 100 fulfillment and logistics centers (covering tens of millions of square feet) combined with proprietary software, AI, and machine learning to predict demand and route deliveries — a moat that competitors in Korea and emerging markets find hard to replicate.
- **Speed & Reliability**: Over 99% of orders delivered same or next day (including dawn delivery) 365 days a year, setting a bar that most global e-commerce players cannot match.
- **Customer Obsession Culture**: "Wow the Customer" is a core leadership principle, driving constant innovation to break traditional tradeoffs (speed, selection, price).
- **Startup Culture with Fortune 150 Resources**: Offers the agility and risk-taking of an early-stage company combined with the stability, compensation, and scale of a large public corporation.

## Strategic Focus
- **AI & Technology Leadership**: Heavy investment in AI/machine learning for demand forecasting, dynamic routing, and customer personalization. Actively hiring senior ML and data engineers [careers page].
- **Global Expansion**: Leveraging its Korean infrastructure playbook to enter new markets (Taiwan, Singapore) and grow its global footprint.
- **Diversification into Fintech & Content**: Building out Coupang Pay, Coupang Play, and fintech products to create an ecosystem (similar to Amazon Prime's strategy).
- **Farfetch Integration**: Turning the luxury fashion platform into a global growth driver.

## Why Work Here
- **Culture**: "Best of both worlds" — startup energy (fast decision-making, ownership, risk-taking) with the resources of a Fortune 150 company. Flat hierarchy, open culture, and a strong "bias for action" ethos [coupang.jobs].
- **Remote/Hybrid/Office Policy**: Flexible working hours and work-from-home options are available. Many roles are based in offices (Seattle, Mountain View, Seoul, etc.) with state-of-the-art amenities including cafeterias serving three meals a day, lounge spaces, and coffee/snack bars.
- **Benefits**:
    - Medical insurance for employee and direct family.
    - Paid family leave (for celebration or bereavement).
    - Learning programs (foreign languages, soft skills).
    - Global project opportunities (collaborate with teams across continents).
    - Team and company events (games, food, bonding).
- **Engineering Culture**: High-impact projects — building the commerce infrastructure of the future (large-scale AI, logistics optimization, mobile-first, search & discovery). Emphasizes "Hire and Develop the Best" and "Learn & Iterate" principles.
- **Career Growth**: Opportunities for internal rotations, upskilling, and taking on entrepreneurial initiatives within a massive scale.

## Sources
1. [Coupang Careers](https://www.coupang.jobs/en/)
2. [Why Work at Coupang](https://www.coupang.jobs/en/why-coupang/)
3. [Coupang About Us](https://www.aboutcoupang.com/aboutus/)
4. [Coupang Investor Relations](https://ir.aboutcoupang.com/overview/)
5. [LinkedIn - Coupang](https://www.linkedin.com/company/coupang)

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