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DevOps Engineer
Build and maintain Kubernetes-based cloud-native platforms to enable fast, safe deployments and resilient operations for Toss’s offline payment ecosystem.
DevOps Engineer
Build and maintain cloud-native infrastructure on AWS EKS to enable fast, secure deployments for insurance products using Kubernetes, Terraform, and observability tools.
DevOps Engineer [산업기능요원/전문연구요원]
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)
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.
ML Engineer (Infra)
Designs and operates ultra-high-performance AI infrastructure (GPU clusters, InfiniBand, Kubernetes) for Toss Securities' ML services, optimizing resource use and eliminating bottlenecks.
ML Engineer (Platform)
Builds and operates a machine-learning platform for a securities app, focusing on LLM serving, gateway systems, and MLOps tooling in Kubernetes.
Node.js Developer
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)
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)
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)
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 (SRE)
Builds and operates resilient payment infrastructure, focusing on stability, scalability, and low latency using Java, Kubernetes, and observability tools.
Site Reliability Engineer
Site Reliability Engineer at Toss in Seoul, maintaining and improving the stability, scalability, and performance of high-traffic systems using Kubernetes, Java/Kotlin, and monitoring tools.
Site Reliability Engineer
Maintains and scales Toss’s payment and financial services infrastructure to ensure high availability and performance using cloud-native tools and DevOps practices.
Data Engineer (금융데이터/AI)
Builds and maintains a global financial data platform for securities, processing real-time market data with AI/ML pipelines using Kafka, Spark, and Iceberg.
Data Engineer (금융데이터/재무)
Builds and maintains scalable data pipelines for financial market data, transforming raw disclosures and market feeds into structured investment insights using Python, SQL, and distributed systems.
Data Engineer (개인화/추천)
Builds and owns data pipelines, features, and infrastructure for a fintech community’s personalized recommendation system using Python, Kafka, Flink, and Spark.
Data Engineer (금융데이터/자문)
Builds and operates data pipelines for Toss Securities’ wealth-management advisory services, integrating partner portfolio data, customer behavior, and regulatory-grade analytics to power portfolio recommendations and content.
Site Reliability Engineer
Build and maintain monitoring, observability, and performance-testing systems to keep Toss Bank’s high-traffic services stable and scalable using Kotlin/Java, Kubernetes, Istio, Kafka, and Prometheus.
Data Engineer
Build and operate Toss’s tax-data infrastructure, enabling large-scale tax refund analytics and powering the refund engine.
Desenvolvedor(a) Back-end Sênior (Remoto)
The Senior Back-end Developer will join the Sustain (N3) team to diagnose, fix, and evolve high-availability messaging and communication systems. The role focuses on resolving complex production incidents, refactoring legacy code, and mentoring N1/N2 teams using Node.js, Python, and TypeScript.