Coupang

Senior Staff Back-end Engineer (Rocket Pay)

Coupang
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4 hours ago
Seoul, Korea, SouthStaff+

Responsibilities

  • Define the technical direction, architecture, and engineering strategy for Rocket Pay’s core payment platform domains.
  • Design, operate, and improve large-scale distributed backend systems supporting payment processing, wallet services, merchant onboarding, settlement, reconciliation, risk controls, and financial reporting.
  • Own system reliability, scalability, security, performance, and data consistency end to end.
  • Lead technical decisions, architecture and design reviews, and improvements to complex services or domains.
  • Structure ambiguous problems and translate customer and business requirements into well-architected technical solutions.
  • Respond to incidents, improve monitoring and SLAs, and support operational excellence in high-traffic environments.
  • Mentor engineers and influence technical direction across the organization through sound judgment and system design.

Requirements

  • At least 12 years of backend engineering experience.
  • Experience designing and operating large-scale distributed systems using Java or Kotlin and the Spring Framework.
  • Experience owning and proactively improving one or more complex services or domains.
  • Ability to design systems with strong consideration for performance, reliability, data consistency, and security.
  • Experience making technical decisions that produced tangible business impact from ambiguous problems.
  • Ability to understand customer and business requirements and translate them into technical solutions with strong ownership.
  • Preferred experience leading architecture design and migration in JPA- and MSA-based environments.
  • Preferred payment or fintech development and operations experience.
  • Preferred experience with incident response, monitoring systems, and SLA improvement in high-traffic environments.
  • Preferred experience processing large-scale data with strong settlement and reconciliation accuracy guarantees.
  • Preferred technical leadership experience in agile software development environments and influencing other engineers through technical judgment and system design.

Benefits

  • Full-time regular employment with a 12-week probation period, which may be skipped, shortened, or extended when necessary for business purposes.

Tech Stack

Categories

Coupang

About Coupang

5,001-10,000 employees

Coupang builds and operates a South Korea–focused e-commerce marketplace with an end-to-end logistics network (Rocket Delivery), plus food delivery, video streaming, and fintech under brands such as Coupang, Eats, and Play. Revenue comes from first-party retail, third-party marketplace services, advertising, and memberships (Rocket WOW). Founded in 2010, the company is headquartered in Seattle and is publicly listed on the NYSE (CPNG).

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