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Toss

Fintech super-app for payments and banking

Frontend Platform Engineer

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

About the Job

Requirements

  • Deep understanding of frontend development and deployment environments, with experience proactively identifying and improving issues.
  • Experience analyzing root causes and solving problems.

Responsibilities

  • Optimize performance across browsers, content delivery networks, and networks to provide a strong user experience at scale.
  • Build an in-house micro frontend architecture framework that enables independent development across teams.
  • Build and manage the company’s deployment infrastructure using cloud services such as Amazon Web Services.
  • Build a client user behavior logging system operated in-house.
  • Develop monitoring and error-response tools for real-time traffic.
  • Build a development environment that enables a seamless user experience across native and web-view screens and avoids compatibility issues between native and web-view platforms.
  • Provide guidance and modules that help product-team developers optimize performance.
  • Build and operate a testing environment using tools such as Storybook and Playwright.
  • Build and operate a deployment pipeline that supports frequent, reliable frontend deployments.
  • Improve frontend developer productivity and the securities service through platform engineering.

Desired Qualifications

  • Experience improving operational efficiency by automating recurring operational tasks.
  • Interest in frontend testing.
  • Experience understanding browser internals and improving web-service performance.
  • Understanding of transpilation and bundling, and experience efficiently supporting a broad range of browsers.
  • Experience managing a monorepo containing more than ten packages.
  • Experience actively evaluating and adopting new technologies.

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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