T

Toss

Fintech super-app for payments and banking

Server Developer – Core Banking

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

About the Job

Requirements

  • Experience developing services based on the Spring Framework using Java or Kotlin.
  • Experience designing databases such as Oracle or MySQL and planning and operating services with them.
  • Familiarity with concepts related to transactions and flow-control methodologies.
  • Experience proactively learning new technology stacks or domains, or improving established practices.
  • Include at least one specific example in the résumé demonstrating project participation, personal contribution, and how a challenging task was overcome.
  • Describe the problem-solving process in detail, including how a problem was defined, approaches taken to resolve it, and outcomes.
  • Describe growth goals as a developer and efforts made toward that growth.

Responsibilities

  • Improve the existing complex monolithic banking system by rebuilding it into a flexible, scalable microservices architecture (MSA).
  • Participate in developing new product launches and collaborate across different areas to expand the scope of work.
  • Design and develop the core banking system using innovative approaches.

Desired Qualifications

  • Experience developing and operating core banking systems in the financial industry.
  • Experience improving inefficient legacy system structures, including for candidates without prior financial-industry development experience.
  • Share experience deeply learning new technologies or attempting improvements to achieve better results than before.

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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