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Toss

Fintech super-app for payments and banking

Server Developer

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

About the Job

Requirements

  • Experience designing and operating highly available, scalable systems.
  • Experience developing systems that handle large-scale real-time traffic.
  • Experience responding to incidents and solving problems.
  • Strong ownership of services and a willingness to share new insights or ideas and take on technical challenges.

Responsibilities

  • Design and develop product servers used daily by many Toss customers.
  • Use current technologies to keep services operating reliably, listen to user feedback, and solve problems quickly and flexibly.
  • Develop services across lending, marketplace, payments, commerce, benefits, advertising, the home screen, and credit data.
  • Build systems that process large volumes of data reliably and quickly, and explore technical approaches to complex problems.
  • Develop and integrate advertising network services and reliably serve high-traffic advertising products, including display and video ads.

Desired Qualifications

  • Experience processing large volumes of traffic quickly and reliably, with concrete details about the technology used and the improvements achieved.
  • Experience identifying problems and proactively improving services.
  • Experience participating in an early-stage service.
  • Experience developing B2C services using the Spring Framework.

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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