Company profile

Toss Securities Tech Stack

Mobile and web brokerage for real-time domestic and overseas stock trading

Financial Services 서울시 201–500 employees Founded 2021 Privately Held

Toss Securities runs a retail brokerage on a TypeScript/React/Next.js frontend and a Java/Kotlin/Spring Boot and Go backend on AWS and Cloudflare, with Bloomberg market data. Job posts center on real-time, high-volume, low-latency event processing and a streaming pipeline built on Kafka Connect, Flink and ksqlDB. Adoption of SOAR and ZTNA, alongside heavy security and compliance hiring, points to a hardening push as the platform scales.

Tech Stack 183 technologies

Core StackReact Next.js TypeScript Webpack Vite AWS Cloudflare Terraform Sentry Grafana Go Storybook Playwright Java Kotlin Hibernate Python Bloomberg React Query Recoil Jotai WebSocket pnpm SWC Babel esbuild Spring Boot Shell Script k6 tcpdump+151 more

AdoptingSOAR ZTNA

What Toss Securities Is BuildingChallenges and projects from their job posts

◆Challenges

Low-latency processing of high-volume real-time trading traffic
Designing high availability architecture
Compliance with consumer protection and privacy laws
Migrating legacy systems
Data consistency and data-flow risk management
Improving infrastructure efficiency

▲Active Projects

Real-time trading data pipeline with Kafka Connect, Flink
Building AI agent orchestration
Digital asset platform expansion
ZTNA deployment
FDS monitoring
UI experimentation for conversion, retention and re-engagement

Hiring Activity

Steady75 roles · 15 in 30d

Department

Engineering

Finance

Data

Product

Security

Ops

Design

Compliance

Seniority

Senior

Manager

Mid

Junior

Lead

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About Toss Securities

Toss Securities is a Seoul-headquartered brokerage founded in 2021 that serves individual investors through a mobile trading app and a web trading platform. Its services include real-time fractional trading of overseas stocks, an investor community, and AI-driven market information. The company employs 201–500 people and is privately held. Hiring is concentrated in South Korea and spans engineering, finance, data, product, security and operations, weighted toward senior and manager-level roles.

Headquarters서울시

Company Size201–500 employees

Founded2021

Hiring MarketsSouth Korea

Frequently Asked Questions

What tech stack does Toss Securities use?

Frontend runs on React, Next.js and TypeScript with React Query, Recoil and Jotai; backend uses Java, Kotlin, Spring Boot and Go on AWS and Cloudflare, with Terraform, Sentry and Grafana for operations.

What is Toss Securities working on?

Projects include real-time stock trading data processing, a Kafka Connect/Flink/ksqlDB streaming pipeline, ZTNA deployment, AI agent orchestration, FDS monitoring and digital asset platform expansion.

Is Toss Securities hiring security engineers?

Yes. Security is among its most active hiring areas, alongside engineering, finance and data, and the company is adopting SOAR and ZTNA. All roles are based in South Korea.

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How this profile is built

Toss Securities's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →

This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.