Senior Staff Backend Engineer

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 are collectively disrupting the multi-billion-dollar commerce industry from the ground up and establishing an unparalleled reputation for being leading 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 at since our inception. We are all entrepreneurial 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 tradeoffs. Join Coupang now to create an epic experience in this always-on, high-tech, and hyper-connected world.

What You Will Do :

• Architect and develop the One-Payroll system to ensure scalable, stable, and secure global operations.
• Design and implement front-end and back-end web services using the Java platform to support both employee-facing and administrative functions.
• Identify and manage cross-domain dependencies, ensuring seamless integration with internal systems and external services.
• Evaluate and adopt emerging technologies to enhance system performance, streamline development workflows, and support long-term maintainability.
• Develop optimized algorithms to automate rule-based processes, such as payroll calculations and incentive distributions, ensuring accuracy and cost-efficiency.

Basic Qualifications :

• 15+ years of professional experience in Java development, with deep expertise in object-oriented design and enterprise-grade application development.
• Demonstrated ability to design and implement large-scale, distributed system architectures that are robust, scalable, and secure.
• Proficient in Java and the Spring framework, with hands-on experience using Git for version control in collaborative development environments.
• Strong working knowledge of relational databases (e.g., Aurora, MySQL) and key-value datastores (e.g., DynamoDB, Redis).
• Experience with workflow orchestration tools such as Temporal or Cadence to automate and manage complex business processes.
• Familiarity with business rule engines (e.g., Drools, Camunda, or similar) to support dynamic and configurable business logic.
• Proficiency in Object-Relational Mapping (ORM) frameworks such as JPA or Hibernate, with solid experience in domain-driven design and modeling.

Preferred Qualifications :

• Proven experience leading technology initiatives within the Payroll, Finance, or Accounting domains, with a deep understanding of domain-specific requirements and compliance standards.
• Proven track record of collaborating with cross-functional stakeholders, including Finance and Accounting teams, to translate business requirements into scalable technical solutions.
• Hands-on experience in developing and operating services in AWS, leveraging cloud-native tools and best practices.
• Strong focus on code quality, with a track record of implementing clean, maintainable, and scalable codebases.
• Experience in automating build, test, and deployment pipelines, ensuring continuous integration and delivery.
• Familiarity with bulk data processing using technologies like Hive, Spark, Flink, etc., especially in high-throughput environments.
• Practical experience working in Agile development environments, with a collaborative and iterative approach to product delivery.

Type of Work Model :

Hybrid - Coupang hybrid work model is designed to enable a culture of collaboration that acts a catalyst to enrich the experience of employees. Employees are required to work at least 3 days in the office per week, with the flexibility to work from home 2 days a week, depending on the role requirement. Some businesses may require more time in office due to nature of work.

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:

Equal Opportunities for All :

Coupang is an equal opportunity employer and is committed to equal opportunity regardless of color, ancestry, religion, sex, nation origin, sexual orientation, age, citizenship, marital status, disability, gender identity or veteran status. Our unprecedented success could not be possible without the valuable inputs of our globally diverse team.