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Toss

Fintech super-app for payments and banking

Server Developer - Platform

Backend EngineeringConfirmed live in the last 24 hours
Full-timeSeoul, South KoreaNo salary listedIn-person

About the Job

Requirements

  • Experience creating and providing shared functionality using Java or Kotlin and the Spring Framework.

Responsibilities

  • Develop and operate the platform that supports all services, and monitor and improve areas related to service incidents.
  • Modularize and provide common capabilities needed by server developers using Java or Kotlin and the Spring Framework, including metrics, logging, distributed locking, and messaging.
  • Develop and operate shared platform services, including an API gateway and monitoring and alerting systems.
  • Monitor server infrastructure, detect incidents quickly, and work to restore service quickly.
  • Consider and improve the architecture from a whole-system perspective.

Desired Qualifications

  • Familiarity with Redis, Kafka, or the ELK stack.
  • Experience designing and operating highly available, scalable systems.
  • Experience designing and operating systems that handle large-scale real-time traffic.
  • Experience monitoring, troubleshooting, and tuning performance across layers such as the Spring Framework, JVM, operating system, and network.
  • Willingness to embrace change and continuously improve services and infrastructure using appropriate technologies.
  • Experience with platform-related work, such as implementing and operating shared services or libraries.
  • Experience designing and operating highly available, scalable systems, including the rationale behind the design.
  • Experience designing and operating systems that handle large-scale real-time traffic, including the rationale behind the design.
  • Specific examples of troubleshooting or performance improvements encountered while operating services.

About the Company

Toss

Fintech super-app for payments and banking

Toss is a South Korean financial services platform that started as a peer-to-peer money transfer service and has grown into a digital 'super app' for personal finance. Its products are accessed through one mobile interface that unifies bank accounts, credit cards, loans, investments, and other financial services, including its own Toss Bank and Toss Securities. It differentiates itself by offering a broad, integrated ecosystem—combining digital banking, asset management, and brokerage services under one roof and running its own banking and securities units. Its goal is to become the leading consumer finance platform in South Korea while expanding its user base globally.

Company size
1,001-5,000
Company stage
Series G
Total funding
$1.5B
Headquarters
Seoul, South Korea
Founded
2011

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