T

Toss

Fintech super-app for payments and banking

ML Engineer

Applied Machine LearningConfirmed live in the last 24 hours
Full-timeSeoul, South KoreaNo salary listedIn-person

About the Job

Requirements

  • A deep understanding of machine learning and experience applying it to varied business problems are desired.
  • Familiarity with SQL and big-data platforms such as Hadoop and Spark is desired.
  • Experience designing and developing models, deploying them in production services, and analyzing their results is desired.
  • Practical experience using major machine-learning libraries such as PyTorch, TensorFlow, XGBoost, or LightGBM is desired.
  • Experience quickly engaging with new problems, independently learning needed skills, and solving them is desirable.

Responsibilities

  • Design and improve recommendation algorithms that optimize product exposure in commerce, and develop models that predict product click-through rates and conversion rates.
  • Build and provide platforms and Kubernetes infrastructure that support safe, rapid experimentation and deployment for varied machine-learning needs.
  • Design and operate the search platform, including real-time large-scale data processing, search infrastructure operations, and search-quality improvement.
  • Use AI technologies such as large language models, retrieval-augmented generation, and multimodal systems to define problems and design technical approaches.
  • Apply machine-learning techniques to solve and automate problems across business domains, and provide shared machine-learning-based technical products to teams.
  • Design and develop machine-learning algorithms and apply them in production operations.
  • Contribute to business impact by using data and user understanding to develop and operate the super app.

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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