T

Toss

Fintech super-app for payments and banking

AI Platform Engineer - Serving

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

About the Job

Requirements

  • Experience integrating components into serving frameworks such as vLLM or SGLang and improving their performance or operations; experience with Triton Inference Server or TensorRT serving recommendation or vision models is also relevant.
  • Understanding of GPU and model fundamentals sufficient to analyze technical problems; kernel-level development experience is not required.
  • Interest in automation, monitoring, and orchestration to improve experimentation and operational efficiency.
  • Ability to write maintainable code and improve code quality through active code reviews.
  • Experience technically defining unstructured problems and solving them systematically.
  • Experience keeping up with emerging technologies and incorporating them into a team is desirable.

Responsibilities

  • Operate and improve the performance of serving frameworks such as vLLM, Dynamo, and Triton.
  • Build and monitor stable real-time serving environments for large-scale LLM and embedding models.
  • Continuously improve system performance with resource efficiency, inference speed, and scalability in mind.
  • Contribute to orchestration and automation for serving incident response and deployment stability.
  • Build and operate serving, experimentation, and operational infrastructure for LLM-based services, RAG systems, and search infrastructure in production.
  • Operate GPU resources and clusters efficiently, and automate experimentation and deployment using tools such as vLLM, Triton, and Model Registry.
  • Build and improve the technical foundations that enable AI technologies to become reliable and scalable services.

Desired Qualifications

  • Experience optimizing and operating training or serving environments for large-scale LLM or embedding models.
  • Experience optimizing LLMs to achieve performance suitable for use in services.
  • Experience building platforms generalized across AI/ML models.
  • Experience operating models in high-performance serving or large-scale traffic environments.
  • Experience solving significant problems and making improvements through open-source contributions, including outside the serving domain.

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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