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Toss

Fintech super-app for payments and banking

Network Engineer

Network Engineering & AdministrationConfirmed live in the last 24 hours
Full-timeSeoul, South KoreaNo salary listedIn-person

About the Job

Requirements

  • At least 3 years of experience building and operating networks.
  • Experience operating dynamic routing Layer 3 protocols such as BGP and OSPF for multi-data-center connectivity.
  • Understanding of Layer 1–7 network protocols, including IP, MAC, TCP, HTTP, SSL, and mTLS, and experience diagnosing and resolving incidents through packet analysis.
  • Experience operating Layer 4/Layer 7 load balancers in high-traffic environments.
  • Experience understanding network performance and health metrics and building or improving data collection and alerting systems using SNMP, APIs, exporters, and Syslog.
  • Experience automating repetitive operational tasks, such as network system configuration and status checks, using scripts or automation tools.
  • Experience using AI tools to develop infrastructure automation code, validate its results, and improve operational work.

Responsibilities

  • Manage and improve all Toss Securities network systems to keep them in optimal condition.
  • Build and operate the office network environment.
  • Design and build a multi-data-center network to deliver uninterrupted services.

Desired Qualifications

  • Familiarity with open-source network monitoring solutions or related development experience.
  • Experience working with domestic and international internet service providers and cloud providers to build multi-data-center connectivity and circuit load balancing.
  • Strong understanding of network overlay technologies such as ACI, VXLAN, EVPN, MP-BGP, IS-IS, and Fabric, with experience building and operating them.
  • Experience building and optimizing cloud networks.

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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