T

Toss

Fintech super-app for payments and banking

AI Engineer – Commerce

Applied Machine Learning +1Confirmed live in the last 24 hours
Full-timeSeoul, South KoreaNo salary listedIn-person

About the Job

Requirements

  • Experience solving real-world problems using AI or machine learning technologies, including large language models or multimodal models for classification, information extraction, or entity matching, and developing models or building inference and evaluation pipelines with tools such as PyTorch or Hugging Face Transformers.
  • Ability to select appropriate technologies for the problem and operating environment, using approaches such as prompt design, structured output, fine-tuning, and embeddings, and combining traditional machine learning with rules to improve quality, speed, and cost.
  • Ability to improve quality through data and evaluation, including building gold sets, evaluating with precision and recall, and analyzing errors to determine improvements.
  • Ability to define problems and lead work through service implementation, define success metrics with cross-functional partners, and design scalable, maintainable systems.

Responsibilities

  • Extract categories, brands, purchase options, and other product attributes from text and images, identify and connect identical products, and design features and embeddings that capture product meaning and characteristics in collaboration with recommendation and search teams.
  • Automate product review and error detection, design processes that use human review outcomes to improve the system, and combine large language models, lightweight models, and rules to improve accuracy, processing speed, and cost.
  • Generate product names and content titles and summarize reviews to provide useful information to customers; collaborate with search quality operations to generate candidate data for search dictionaries and relevance-evaluation gold sets.
  • Define success metrics with commerce teams, verify outcomes through experiments and quantitative evaluation, use operational data for ongoing improvements, and identify new opportunities to apply AI.

Desired Qualifications

  • Experience with data modeling or human-in-the-loop approaches to improve data quality and review processes.
  • Experience with product catalogs, feature extraction for recommendations and search, search relevance evaluation, or factuality verification of generated content.

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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