Toss Securities Tech Stack

Mobile-first investment platform with fractional stock trading and AI market insights

Financial Services 서울시 201–500 employees Founded 2021 Privately Held

Toss Securities operates a technology-driven retail investment platform launched in 2021, built on a polyglot stack (Java, Kotlin, Spring) with heavy infrastructure patterns (Kafka, Kubernetes, Redis, Elasticsearch) designed for high-throughput trading. The company is actively adopting RAG and SOAR tooling while expanding security and data capabilities — hiring heavily in engineering, data, and security roles — signaling simultaneous pushes toward AI-driven insights, transaction scale, and regulatory compliance. Pain points around performance optimization and large-scale transaction processing indicate they are scaling infrastructure to handle retail volume spikes.

Tech Stack 170 technologies

Core StackJava Kotlin Redis Kafka Kubernetes Elasticsearch Hibernate MySQL Oracle MongoDB InfluxDB Grafana Istio AWS Docker ArgoCD Jenkins Prometheus Nginx Spring Framework Netty Tomcat Git GoCD Consul Vault Spinnaker Ceph Harbor HAProxy+137 more

AdoptingRAG Kafka SOAR ZTNA

What Toss Securities Is Building

◆Challenges

Strengthening privacy management
Performance optimization
Risk management data flow
Accelerating product release through automation
Improving internal controls
Localizing for japanese market
Supporting large-scale traffic
Supporting retail top securities capacity
Supporting large capacity infrastructure
Large-scale transaction processing

▲Active Projects

Annual audit plan
Vdi infrastructure build and operation
Overseas product consultation process development
Privacy policy development and operation
Automating security log analysis and response procedures
Data mart design and development
Public disclosure report data mart design
Design system development for toss securities services
Micro frontend architecture
Deployment pipeline reliability

Hiring Activity

Accelerating140 roles · 100 in 30d

Department

Engineering

Data

Product

Security

Finance

Ops

Marketing

Design

Seniority

Mid

Manager

Senior

Junior

Lead

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About Toss Securities

Toss Securities is a South Korea-based fintech platform that democratizes retail investing through a mobile trading system launched in March 2021. The company offers fractional overseas stock trading, real-time market data, and an active investor community. With 201–500 employees and 141 active open roles, the organization is structured around engineering, data, product, and security functions, indicating investment in both platform reliability and compliance. The company targets retail investors seeking lower barriers to entry and accessibility, positioning investment as a personal empowerment tool rather than a wealth-accumulation mechanism alone.

Headquarters서울시

Company Size201–500 employees

Founded2021

Hiring MarketsSouth Korea

Frequently Asked Questions

What tech stack does Toss Securities use?

Java, Kotlin, Spring Framework, Redis, Kafka, Kubernetes, Elasticsearch, and MySQL/Oracle. Infrastructure includes Docker, AWS, ArgoCD, Prometheus, and Nginx. Adopting RAG and SOAR.

What is Toss Securities working on?

Security automation (log analysis), data infrastructure (mart design, public disclosure reports), micro frontend architecture, design systems, deployment reliability, and VDI infrastructure for operations.