Toss

Server Developer (Platform)

API API Gateway Argo CD Cloud DevOps +19 skills

Build and maintain the core server platform for Toss’s fintech services using Java/Kotlin and Spring, focusing on scalability, monitoring, and distributed systems.

Site Reliability Engineer

Open 91d APAC

Argo CD AWS Cloud Containerd DevOps +20 skills

Maintains and scales Toss’s payment and financial services infrastructure to ensure high availability and performance using cloud-native tools and DevOps practices.

Analytics CQRS Data Analytics Flink Iceberg +4 skills

Data Engineer on Toss Place's Data Platform Team in Seoul designs, builds, and operates real-time streaming data pipelines on Flink and Kafka, and standardizes repeated pipeline work into a shared self-serve streaming platform so product teams can consume data in real time.

Data Platform Engineer (Streaming)

Data Engineering Flink Kafka MongoDB MySQL +1 skills

Builds and operates real-time data pipelines and streaming platforms using Kafka, Flink, and CDC tools to process high-volume logs and transactions for Toss Bank.

DevOps Engineer

AWS CI/CD Cloud Cloud Native DevOps +14 skills

Build and maintain Kubernetes-based cloud-native infrastructure at a leading Korean fintech company, automating deployments and improving developer experience.

DevOps Engineer

Argo CD AWS Ceph CI/CD Cloud +26 skills

Build and refine CI/CD pipelines and Kubernetes-based infrastructure for Toss Securities, focusing on developer experience and robust monitoring to enable rapid, safe deployments.

DevOps Engineer [산업기능요원/전문연구요원]

AWS CI/CD Cloud Cloud Native DevOps +14 skills

Build and refine Kubernetes-based CI/CD pipelines and observability tooling to help Toss developers deploy and debug services at scale.

ML Engineer (커뮤니티 추천)

API ClickHouse Elasticsearch FastAPI Grafana +17 skills

Build and improve a community-feed recommendation system for a stock-trading app used by 4 million monthly active users, using Python, PyTorch, and cloud-native serving stacks.

120M – 200M KRW

Node.js Developer

Automation ELK Kafka NestJS Node.js +4 skills

Build and maintain Node.js-based automation platforms at a fintech securities company, using TypeScript, NestJS, and distributed systems tools to streamline customer and internal services.

Security Engineer (이벤트 분석/사고 대응)

Cloud ELK Kafka Kubernetes Splunk

Build and operate a SIEM-based security monitoring system, analyze security events, and respond to incidents for Toss Securities, using tools like Splunk and ELK.

Security Engineer(보안 분석 플랫폼 운영)

AWS Elasticsearch ELT ETL Hadoop +7 skills

Security Engineer in the Security Purple Team, responsible for designing, building, and operating SIEM (Splunk, Opensearch, Elasticsearch) and log pipelines (NIFI, KAFKA, Hadoop) across On-Prem, AWS, and K8S environments, focusing on log collection, analysis, and automation.

Security Researcher (APT/인프라 모의해킹)

DevOps Docker Git Gradle Grafana +10 skills

A Security Researcher performs simulated hacking (APT attacks) and infrastructure diagnostics to proactively identify and mitigate vulnerabilities across Toss’s financial systems, collaborating closely with engineering teams to enhance security while balancing usability.

Server Developer (Platform/Product)

API CRM ELK ERP Git +16 skills

Develops and maintains core insurance CRM, ERP, and CMS systems for agents, focusing on automation, security, and scalability using Kotlin/Java and Spring Boot.

Server Developer (생산성)

Hadoop Kafka Kotlin MongoDB MySQL +2 skills

Builds and maintains scalable backend services powering Toss’s fintech products like payments, loans, and ads using Kotlin/Spring, MySQL, Kafka, and Redis.

Server Developer (3년 이상)

Cloud DevOps Elasticsearch Gradle Java +12 skills

Develops and maintains payment systems, focusing on scalability and reliability. Core technologies include Java, Kotlin, Spring, Redis, Kafka, and MySQL.

Server Developer (3년 이하)

API Cloud Elasticsearch Gradle Java +9 skills

📢 지원자 모두에게 코딩테스트 전형의 기회가 주어져요 오직 토스페이먼츠에서만 할 수 있는 경험 “시행착오를 줄여주는 동료들과 함께 나의 가능성을 새롭게 발견해요” 토스페이먼츠를 활용하는 여러 가맹점에 영향을 미치는, 20년 이상의 장기적인 수명을 가진 제품을 만들어요. 이전 기술의 히스토리를 모두 파악하고 이를 토대로 개선 방안을 찾는, 높은 복잡도와 난이도를 가진 업무들을 경험할 수…

Server Developer (Market Platform)

API Kafka Kotlin MySQL NATS +2 skills

Develops and optimizes high-performance real-time trading platforms (e.g., stock market data feeds) for Toss Securities, designing scalable architectures for APIs/WebSockets, low-latency event processing, and inter-institution communication using Go, Kotlin/Spring, and Kafka.

Server Developer (Messaging Platform Team)

ELK Grafana Hibernate Java JPA +9 skills

Server Developer building and operating Toss's messaging platform (push, Alimtalk, email) and A/B testing infrastructure using Kotlin, Java, Spring Boot, Kafka, and MySQL/MongoDB/Redis.

Server Developer (Platform)

API API Gateway Argo CD Ceph Cloud +19 skills

Builds and operates high-availability platform services for Toss Bank, including messaging, API gateways, monitoring, and caching, using Kotlin/Java and Spring ecosystems.