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Toss

Fintech super-app for payments and banking

Data Engineer - DataOps

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

About the Job

Requirements

  • At least 3 years of data platform or infrastructure engineering experience.
  • Experience directly building and operating one of the following: a log/search platform or a data deployment/workflow platform.
  • Experience finding root causes of recurring incidents or performance problems and resolving them structurally.

Responsibilities

  • Operate log/search platforms, data-specific Kubernetes, and data CI/CD systems, providing a shared foundation for data engineering.
  • Improve the reliability and efficiency of the entire log pipeline, from collection through ingestion, so it can ingest more than ten million log events per second at peak and support fast search.
  • Own hundreds of Vector agents in the log collection layer; automate agent registration, deployment, and configuration changes, and develop self-service log collection management for service teams.
  • Research, validate, and lead adoption of new log platforms and architectures to accommodate continued growth in log volume.
  • Research expanding the log platform into an observability platform that handles logs, traces, and metrics together, and evaluate ways to connect log data to the data platform for analysis and services.
  • Operate the Elasticsearch search platform supporting securities, news, and content search, and the Milvus vector search platform for recommendation and semantic search; provide technical support for index design and performance issues.
  • Design a standard deployment path that safely delivers data artifacts such as batch jobs, models, and pipeline code to Kubernetes in accordance with financial-sector compliance requirements, and provide a repeatable self-service deployment environment for teams.
  • Provide workflow schedulers operated by multiple teams in a standard form that meets governance requirements, and develop them into a shared platform.
  • Operate data-specific Kubernetes hosting data ingestion, serving, batch workloads, and internal tools; design orchestration strategies and operating standards for batch, streaming, and serving workloads.
  • Make deployment status observable and connect it to maintenance and incident-response processes to reduce operational problems structurally.
  • Continuously analyze data engineers’ development experience, improve friction points through processes and tools, and take responsibility for persuading the organization to adopt and sustain new ways of working.

Desired Qualifications

  • Experience installing, configuring, and operating Elasticsearch or an equivalent search-engine cluster.
  • Experience operating large-scale log ingestion pipelines and resolving throughput or latency issues, or automating deployment of collection agents.
  • Experience operating stateful data workloads such as batch, streaming, and serving on Kubernetes.
  • Experience designing CI/CD pipelines or workflow schedulers used by multiple teams and providing them as a platform.
  • Experience aligning with relevant organizations to introduce and establish changes to working practices involving compliance or security requirements or new platforms.
  • Experience collaborating with search engineers to improve search quality or building vector search services.
  • Experience operating or using distributed databases or distributed processing systems.
  • Experience building observability for a large-scale platform and leading incident response and zero-downtime upgrades or patches.

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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