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Toss

Fintech super-app for payments and banking

Device Software Engineer - Android, Device Software Engineer

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

About the Job

Requirements

  • Experience developing Android-based software, such as applications or frameworks.
  • A preference for investigating problems deeply and resolving their root causes.
  • Interest in software that runs on physical devices.

Responsibilities

  • Develop and improve system software for Android-based payment terminals.
  • Analyze and resolve issues across application, framework, and hardware abstraction layers.
  • Debug and improve performance and stability issues occurring on actual devices.
  • Collaborate with hardware and firmware engineers to understand device behavior and resolve issues.
  • Participate throughout the product lifecycle, from product development through post-production quality issue response.
  • Find and resolve root causes through log analysis and reproduction environment setup.
  • Analyze and improve Android internals, including AOSP and system services, when needed.

Desired Qualifications

  • Understanding of or interest in Android Framework or AOSP structure.
  • Experience with system-level debugging, including logs, crashes, or application not responding (ANR) issues.
  • Basic understanding of C/C++ or native areas.
  • Interest in performance optimization, including CPU, memory, and threads.
  • Interest in embedded systems or device development.
  • Experience working on issues involving hardware integration.

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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