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Toss

Fintech super-app for payments and banking

DevOps Engineer

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

About the Job

Requirements

  • Experience diagnosing problems in a DevOps or Platform Engineering environment, setting goals and a roadmap, and leading key initiatives through execution.
  • Experience designing and operating a production Kubernetes platform in a public cloud, including technical decisions about architecture, scaling, upgrades, failure isolation, and change safety.
  • Experience using infrastructure as code to manage production infrastructure reproducibly and building CI/CD, GitOps, or infrastructure automation systems used by multiple services and teams, including driving adoption and operational change.
  • Ability to develop platform features, diagnostic and recovery tools, and operational automation in at least one programming language, using software engineering practices that include testing and review.
  • Experience leading root-cause analysis and recovery for incidents spanning application, container, operating system, and network layers, and preventing recurrence through automation and architecture improvements.
  • Ability to make technical decisions based on trade-offs among reliability, performance, security, cost, and operational complexity, and to build agreement across teams and embed decisions into working practices.

Responsibilities

  • Develop a DevOps strategy and long-term roadmap for the Cloud Native platform based on Toss Place's product and organizational growth plans; assess platform risks and limitations, set objectives, priorities, and success criteria for key initiatives, and execute them.
  • Design target architectures for multiple Kubernetes clusters in AWS and an Istio-based service mesh; use capacity planning and performance validation to continuously improve scalability, single points of failure, fault isolation, change safety, resource efficiency, and cost efficiency.
  • Standardize processes from build through deployment, validation, and rollback, and advance CI/CD- and GitOps-based deployment platforms.
  • Use infrastructure as code and policy as code to manage infrastructure changes reproducibly and implement security and compliance requirements as built-in platform safeguards.
  • Identify repetitive infrastructure work and operational friction for developers, and address them with self-service tools and platforms; measure improvements through adoption, task time, and changes in repetitive workload.
  • Operate observability foundations that reliably collect, store, and query metrics, logs, and other telemetry; provide platform capabilities and tools that enable SRE and product teams to measure and use their reliability standards.
  • Lead incident response and recovery in infrastructure and platform areas; support root-cause analysis and recovery for service incidents with SRE and product teams; create runbooks and recovery tools for major incident scenarios and automate recurring diagnosis and recovery tasks.
  • Document key designs and technical decisions, support colleagues' development through design reviews and knowledge sharing, and advance team technical standards and working practices so the platform can be designed and operated consistently.

Desired Qualifications

  • Experience solving traffic management, security, observability, or performance problems in an Istio- or Envoy-based service mesh.
  • Experience designing and validating high availability and disaster recovery for multi-cluster or multi-region environments.
  • Experience implementing progressive delivery, automated validation, and rollback in a deployment platform used by multiple services.
  • Experience operating an observability platform based on Prometheus, Thanos, Grafana, or OpenTelemetry.
  • Experience operating in environments such as payments or finance where availability, data consistency, security, and compliance are important.
  • Experience validating system failure propagation and recovery through incident recovery exercises or fault injection.
  • Experience making measurable improvements in infrastructure cost and resource efficiency through visibility, architecture, or operational policy changes.

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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