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Toss

Fintech super-app for payments and banking

Forward Deployed Engineer

AI Application Engineering +1Confirmed live in the last 24 hours
Full-timeSeoul, South KoreaNo salary listedIn-person

About the Job

Requirements

  • Able to develop and operate backend servers and data integrations reliably.
  • Able to quickly understand unfamiliar business domains and systems and explain complex AI concepts in the audience's terms to persuade stakeholders.
  • Have a general understanding of automatic speech recognition, text-to-speech, large language models, retrieval-augmented generation, and agentic workflows, and an interest in deploying them in real operating environments.
  • Able to apply systems quickly and improve them using real data and feedback.
  • Able to focus on business impact and deliver results through technology.

Responsibilities

  • Own technical design, implementation, and stabilization for deployments, and define scope and success criteria with business and product stakeholders.
  • Connect each adopting organization's knowledge systems and operating policies in a form that AI can accurately use.
  • Build backend and data integrations so AIOC operates reliably across different operating environments.
  • Design integrations that can retrieve and process information from business systems in real time during calls while preserving the call experience despite latency or failures.
  • Incorporate deployment problems and learnings into the product to prevent them from recurring in future deployments.
  • Meet prospective adopting organizations with business and product teams and lead technical validation and integration discussions.

Desired Qualifications

  • Have developed and operated real-time systems that manage state during ongoing connections, such as calls, chat, gaming, or real-time trading, using technologies such as WebSocket, gRPC streaming, or WebRTC.
  • Have converted repeated integrations across organizations or customers into shared modules or configuration-based structures that reduce implementation time.
  • Have coordinated requirements directly with stakeholders in other internal organizations or at external customers.
  • Have implemented customer deployments or integrations at a B2B solutions company or global SaaS company.
  • Have experience implementing frontend systems.
  • Have knowledge of call-based work domains such as counseling, customer service, or outbound telemarketing.

About the Company

Toss

Fintech super-app for payments and banking

Toss is a South Korean financial services platform that started as a peer-to-peer money transfer service and has grown into a digital 'super app' for personal finance. Its products are accessed through one mobile interface that unifies bank accounts, credit cards, loans, investments, and other financial services, including its own Toss Bank and Toss Securities. It differentiates itself by offering a broad, integrated ecosystem—combining digital banking, asset management, and brokerage services under one roof and running its own banking and securities units. Its goal is to become the leading consumer finance platform in South Korea while expanding its user base globally.

Company size
1,001-5,000
Company stage
Series G
Total funding
$1.5B
Headquarters
Seoul, South Korea
Founded
2011

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