Staff SAP ABAP Developer - Global Accounting Tech

Company Introduction   We exist to wow our customers. We know we’re doing the right thing when we hear our customers say, “How did we 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  As a Staff SAP ABAP Developer, you will be a core technical contributor within Coupang’s Global Accounting Technology (GATE) team, delivering high-quality ABAP solutions that power our mission-critical financial operations. You will independently own end-to-end development — from requirements analysis and technical design through implementation, testing, and production deployment — across multiple SAP modules. This role demands a seasoned developer who can work autonomously with minimal supervision, resolve production incidents independently, and maintain the highest standards of code quality and testing rigor. You will serve as a technical anchor for the team — setting quality standards, conducting code reviews, and mentoring junior developers — while delivering complex ABAP solutions at scale. You will work across SAP ECC and S/4HANA environments, supporting Coupang’s ongoing transformation from legacy SAP systems to a modern S/4HANA landscape. The ideal candidate combines deep ABAP expertise with strong problem-solving skills and the discipline to deliver reliably in a high-volume, fast-paced e-commerce environment. What You Will Do Independent End-to-End Development

Own the full development lifecycle for assigned SAP workstreams — from functional specification analysis through technical design, coding, unit/integration testing, and production deployment Translate business requirements into robust technical solutions with minimal guidance, independently determining the optimal approach Deliver across multiple SAP modules (FI/CO/MM/SD) with deep process understanding and cross-module awareness Handle concurrent development tasks while maintaining quality and meeting delivery timelines

Code Quality & Development Standards

Define and enforce coding standards, naming conventions, and best practices for ABAP development within the team Lead code review processes — review junior developers’ code against established quality criteria, provide constructive feedback, and maintain consistency Write well-structured, performant, and maintainable ABAP code that serves as a reference for the team Establish and own test strategies including unit testing, integration testing, and regression testing with clear coverage targets

Production Support & Incident Management

Independently investigate and resolve production incidents without escalation — perform root cause analysis (RCA) and implement permanent fixes Diagnose system performance issues in ABAP programs, database access patterns, batch jobs, and interfaces Develop and execute go-live checklists, cutover plans, and rollback procedures for deployments Monitor and stabilize high-volume financial processes including month-end close, mass posting, and settlement operations

Performance Optimization & Technical Excellence

Identify and resolve performance bottlenecks in ABAP code, SQL access, and data processing routines Optimize batch job execution, interface throughput, and report generation for high-volume scenarios Analyze and refactor legacy custom code to improve maintainability, performance, and alignment with SAP best practices Apply SAP performance tuning techniques (runtime analysis, SQL trace, buffer optimization) systematically

S/4HANA Transition Support

Support the ECC-to-S/4HANA conversion by analyzing custom code impact, identifying simplification items, and adapting existing programs Develop new solutions aligned with S/4HANA architecture principles — CDS Views, ABAP for HANA, and Clean Core guidelines where applicable Participate in migration testing, data validation, and technical cutover activities

Technical Mentoring & Knowledge Sharing

Mentor junior and mid-level developers through pair programming, code reviews, and technical guidance Create and maintain technical documentation — design patterns, troubleshooting guides, and onboarding materials Contribute to knowledge-sharing sessions and technical brown bags to raise the overall team capability Participate in technical interviews and hiring assessments for new team members

Basic Qualifications

Bachelor’s degree in Computer Science, Information Systems, Engineering, or related field 8+ years of SAP ABAP development experience with proven end-to-end delivery (design → implement → test → deploy) Independent ownership of 2+ SAP modules (FI/CO/MM/SD) with full business process understanding of owned modules Production incident response & RCA experience — demonstrated cases of resolving critical issues independently without escalation Test strategy ownership — experience establishing unit/integration/regression testing approaches with self-driven coverage targets Code review leadership — track record of reviewing junior developers’ code and setting enforceable quality standards Strong understanding of SAP data model, table relationships, and cross-module data flows Proficiency in ABAP development including Reports, Module Pool, ALV, Smart Forms/Adobe Forms, BAPIs, BADIs, User Exits, and Enhancement Framework

Preferred Qualifications

Independent technical specification writing and design review leadership experience Mentoring track record — technical onboarding program design or structured knowledge transfer SAP S/4HANA migration or conversion project experience (custom code adaptation, simplification) Fiori/UI5 development experience or ABAP RESTful Application Programming (RAP) Experience with CDS Views, AMDP, and ABAP for SAP HANA optimization techniques Understanding of SAP integration technologies — IDocs, RFC/BAPI, PI/PO, or Integration Suite

Bonus Qualifications

E-commerce, retail, or logistics domain experience CI/CD pipeline experience, Git-based version control, and automated testing frameworks (ABAP Unit, eCATT) Korea financial system experience (Firm Banking, e-Tax Invoice, virtual accounts, GIRO)

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.

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