Toss Securities Tech Stack

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

Financial Services 서울시 201–500 employees Founded 2021 Privately Held

Toss Securities operates a Java/Kotlin-heavy backend (Spring Framework, Kafka, Elasticsearch) powering fractional stock trading and real-time market data. The tech stack reflects a fintech infrastructure play: Redis caching, Kafka event streams, Elasticsearch indexing, plus emerging RAG adoption signals an AI feature roadmap. Hiring is balanced across engineering, product, and data (14, 13, 10 roles respectively), with seniority skewed toward mid and senior levels—typical of a scaling fintech post-product-market fit.

Tech Stack 165 technologies

Core StackJava Kotlin Redis Kafka Elasticsearch Grafana Go MySQL Oracle MongoDB Python Kubernetes Istio ArgoCD Apache Airflow Prometheus Hadoop Apache Spark ClickHouse Spring Framework Tomcat Netty Spring Boot Spring Cloud Config HAProxy GoCD Ceph Harbor Impala HBase+132 more

AdoptingRAG

What Toss Securities Is Building

◆Challenges

Strengthening privacy management
Risk management data flow
Supporting large-scale traffic
Ai-based privacy compliance
Automating repetitive operations
Model performance degradation
Creating synergy
Managing post-merger integration
Automation for faster product release
Regulatory advancement research

▲Active Projects

Privacy policy development and operation
Obtaining and maintaining domestic/international security certifications
Annual it audit plan
M&a deal execution
External hiring events planning
High availability architecture design and automation system
Cpc mart development
Launching new financial services
Portfolio management
Disaster recovery process evaluation

Hiring Activity

Steady80 roles · 30 in 30d

Department

Engineering

Product

Data

Security

Design

Finance

Ops

Seniority

Mid

Senior

Manager

Junior

Lead

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About Toss Securities

Toss Securities is a South Korean investment platform launched in March 2021 that has built a mobile trading system targeting retail investors. The product enables fractional overseas stock trading, community-driven investing, and web-based trading, paired with AI-driven information tools to reduce friction in market research. The company operates 201–500 employees across engineering, product, data, security, and design. Current focus areas include high-availability architecture, new financial service launches, portfolio management, and post-merger integration, alongside active work on privacy certifications and disaster recovery.

Headquarters서울시

Company Size201–500 employees

Founded2021

Hiring MarketsSouth Korea

Frequently Asked Questions

What tech stack does Toss Securities use?

Primary languages: Java, Kotlin. Frameworks: Spring Boot, Spring Cloud, Spring Framework. Data: Kafka, Elasticsearch, Redis, MySQL, MongoDB, Oracle, ClickHouse, HBase, Hadoop. Infrastructure: Kubernetes, Istio, ArgoCD, GoCD. Monitoring: Prometheus, Grafana. Currently adopting RAG.

What is Toss Securities working on?

High-availability architecture and automation, new financial service launches, portfolio management tools, M&A integration, disaster recovery process evaluation, and privacy/security certification maintenance.

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.