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Toss

Fintech super-app for payments and banking

Data Engineer - Platform

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

About the Job

Requirements

  • Experience operating distributed processing system clusters, with a strong understanding of Hadoop and Spark.
  • Experience operating Kubernetes (EKS or GKE) in AWS or GCP, or building and operating a cloud-based data platform using services such as EMR, Dataproc, BigQuery, S3, or GCS.
  • Experience operating, performance-tuning, and responding to incidents in distributed query engines such as Trino or Impala.
  • Experience operating Airflow platforms and improving enterprise workflow stability and efficiency through scheduling design, execution-resource management, and incident response.
  • Python, Java, or Scala development skills and an understanding of deploying and operating services in Docker and Kubernetes environments.

Responsibilities

  • Design and enhance large-scale Hadoop data infrastructure and Kubernetes-based Airflow platforms, and ensure the stability of enterprise data pipelines.
  • Design hybrid data-platform architecture spanning on-premises and cloud environments, and lead workload migration to cloud services including EKS, GKE, S3, GCS, EMR, Dataproc, and BigQuery.
  • Operate distributed query engines such as Trino, Impala, and Spark SQL; analyze and tune performance bottlenecks to improve data query environments.
  • Design a self-service business intelligence environment and a semantic layer that provides consistent metrics, and build a platform enabling AI agents and internal large language models to access and use data safely.
  • Operate Tableau and Superset business intelligence and exploratory data analysis platforms, diagnosing incidents and improving automation and alerting through code.
  • Analyze performance incidents and scalability issues, and proactively design and implement code-based operational automation.
  • Collaborate with enterprise data engineers and analysts to improve platform environments and systems so data can be used easily and safely.
  • Evaluate and adopt new technologies and open-source software to continuously improve data-platform performance and scalability.

Desired Qualifications

  • Ability to analyze and modify open-source software at the code level to solve problems, collaborate across teams, and incorporate financial-sector security and stability standards into systems.
  • Interest in semantic layers, business intelligence and exploratory data analysis, or integration with large language models and AI agents.

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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