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Toss

Fintech super-app for payments and banking

Frontend Developer

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

About the Job

Requirements

  • Experience developing and operating web services based on React.
  • Ability to abstract complex requirements into simpler problems and consider architectures that remain flexible to change.
  • Experience developing and optimizing with browser rendering performance in mind.
  • Experience proactively defining problems and solving them technically.

Responsibilities

  • Build mobile products that run in Android and iOS webviews, desktop products that run in PC browsers, and operational back-office tools using modern web technologies.
  • Create services that deliver a smooth investment experience and make complex investment products, including securities trading systems and account structures, easy for anyone to use.
  • Use appropriate engineering techniques, including WebSockets, Web Workers, and custom-built modules, to deliver real-time data accurately and continuously so users can trade based on reliable information.

Desired Qualifications

  • When describing experience on a résumé, explain its impact and lessons learned rather than simply listing past work.
  • Describe cases where you proactively defined a problem and solved it technically rather than only completing assigned tasks.
  • Describe experience implementing services with high complexity or difficult requirements, especially cases where complex or repetitive problems were abstracted into simpler forms.

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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