Coupang Internal - Staff SAP ABAP Developer - Global Accounting Tech
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Requirements
• 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 • 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 • 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 • 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. • 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/
Responsibilities
• 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 • 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
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