Toss

Merchant Onboarding Specialist

Handles end-to-end onboarding of online merchants onto Toss Payments’ payment services, consulting on contracts and coordinating approvals with payment providers.

AI Claude Code

ML Backend Engineer

AI Kotlin Machine Learning Python

Designs and builds backend services for AI-driven banking products, focusing on scalable ML model serving and robust server architecture in a microservices environment.

100M – 150M KRW

ML Engineer [전문연구요원]

AI Hadoop Kubernetes LLM Machine Learning +7 skills

ML Engineer at Toss builds and deploys recommendation, search, and AI models across fintech and ecommerce to optimize product exposure, CTR, and user experience using PyTorch, Spark, and Kubernetes.

ML Engineer (LLM)

AI Fine Tuning LLM Machine Learning NLP

Build, fine-tune, and operate LLM/NLP models to simplify complex financial-securities information into user-friendly services at a Korean fintech company.

ML Engineer (Product)

AI Fine Tuning Kubernetes LLM Machine Learning +4 skills

Builds and deploys AI/ML systems for banking services like fraud detection, lending models, and LLM-based agents in a high-traffic, regulated environment.

Network Engineer

AI AWS Azure EVPN GCP +4 skills

Network Engineer at Toss, responsible for building and operating networks for various services, ensuring high availability and optimizing performance using BGP, EVPN, and TCP/IP.

Network Security Engineer (5년 이상)

AI Ansible API EKS Firewall +11 skills

Designs, deploys, and maintains network security infrastructure (firewalls, VPNs) to protect Toss Securities’ high-volume financial and commerce platforms, ensuring 24/7 uptime while optimizing traffic and automating operations with scripting/APIs.

Network Security Engineer (5년 미만)

AI Ansible API Fortinet GPU +6 skills

Builds and maintains secure network infrastructure for Toss Securities, managing firewalls, DDoS protection, and VPNs to safeguard customer and internal systems.

People Systems Manager(Workday)

AI API LLM REST SaaS +1 skills

합류하게 될 팀에 대해 알려드려요 토스의 인사 시스템은 단순한 백오피스를 넘어, 구성원들이 성장하고 협업하는 경험의 기반이 돼요. 소속 될 팀은 Workday를 중심으로 다양한 SaaS 솔루션과 내부 시스템을 통합하고, 더 나은 정책과 경험을 만들어 가기 위한 기반 시스템을 설계하고 운영해요. People Strategy Manager, People Data Scientist,…

Platform Product Owner

AI LLM Machine Learning SaaS

Owns internal banking platforms that support loan, deposit, and card teams, designing admin systems and automating workflows to boost productivity for Toss Bank’s staff.

Product Manager (LLM)

Leads end-to-end planning, experimentation, and delivery of AI/ML-powered features for a Korean neobank, collaborating with data scientists and engineers to drive user and business impact.

AI LLM Machine Learning

Security Engineer (클라우드 보안)

AI AWS Azure CloudFormation GCP +10 skills

Designs and implements cloud-native security architectures (AWS/GCP/Azure) to protect financial infrastructure, automating compliance and threat detection with Python and Terraform.

Technical Product Owner (AI)

Owns AI-driven features at Toss, defining how ML models power recommendations, search, and personalization, and measuring their business impact through experiments.

AI Machine Learning

Systems Engineer (GPU)

Open 107d APAC

AI CUDA GPU Grafana HPC +5 skills

Designs, builds, and operates GPU infrastructure for AI/ML workloads, including bare-metal clusters, networking, and monitoring.

Product Owner (User Journey)

Open 99d APAC

AI Automation LLM Machine Learning

Owns the AI-driven investment content journey for Toss Securities, from content creation to user discovery and retention, using data and experiments to build trust in AI recommendations.

Security Researcher

Open 99d APAC

AI AWS Bash Cissp Cloud +6 skills

Performs regular and ad-hoc security assessments, penetration testing, and vulnerability analysis for a digital bank’s infrastructure, systems, and applications using Python, Django, and cloud-native tools.

Customer Success Manager

Open 94d APAC

합류하게 될 팀에 대해 알려드려요 토스뱅크 Customer Success Manager는 Customer Experience Team의 구성원으로서 함께 할 예정이에요. Customer Experience Team은 토스뱅크 상담 경험 개선을 위한 정책을 수립하고 운영하고 있어요. 만족스러운 고객경험을 위한 운영 전략을 수립하고, VOC 분석을 통해 고객의 문제를 해결하고 있어요. VOC…

AI Python SAS SQL

Data Analyst (7년 이상)

Open 93d APAC

Data Analyst at Toss Securities responsible for quantifying product goals, uncovering problems from data, and designing metrics frameworks to align cross-team decisions in a fintech environment.

AI Machine Learning

Data Analytics Engineer (DW)

Open 86d APAC

AI Airflow Analytics CLI Data Analytics +7 skills

Builds and maintains Toss’s enterprise data warehouse, automating pipelines and data marts with Hadoop and open-source tools while collaborating with analysts and ML teams.

100M – 150M KRW