• 인증·인가, 트래픽 제어, 로깅 등 AI SaaS 핵심 플랫폼 기능을 설계·구현·운영 • 사용량 기반 과금, 크레딧/쿼타 기반 비용 관리 시스템 개선 • 트래픽 증가 및 장애 상황에 대비한 확장성, 안정성 있는 서비스 설계 및 구현 • 로그·모니터링·알림을 활용해 서비스 이슈를 분석하고 품질을 지속적으로 개선 • 고객 문의 및 장애 이슈를 기술적으로 분석하여 근본 원인을 파악하고 재발 방지에 반영 • 서비스 운영 효율 향상을 위한 내부 운영 툴 설계·개발 • 그 외 업스테이지 제품과 관련된 서비스 운영 및 개발

• Develop and maintain a scalable, high-performance backend using Node.js, TypeScript, GraphQL, and MySQL • Design and implement systems for personalized content such as feeds, recommendations, and timelines • Build and optimize scalable APIs to support growing user demand • Collaborate closely with frontend, design, and data teams to deliver features end-to-end • Improve system architecture, caching strategies, and data integrations • Contribute to technical decisions around scalability, performance, and the future growth of the platform • Ensure backend systems are reliable, maintainable, and optimized for production environments

• Own technical design, implementation, and delivery of features across all levels of the stack (frontend and backend), in particular on the Identity surface (auth, permissions, team management) • Write high-quality testable code that's functional, long term maintainable and performant • Drive exploration, alignment and cross-team collaboration for owned projects and surfaces • Prioritize the highest impact work by balancing Engineering interests with business outcomes and product/design requirements • Proactively improve the tech stack with tooling, abstractions, and test infrastructure • Provide knowledge transfers, pairing time and mentorship for other Engineers • Give constructive feedback in retros, RFCs, and PRs. Conversely, receive feedback and turn it into positive change

• Take ownership of how our products and systems operate. • Collaborate with team members in an iterative development environment. • Contribute positively to our culture of team collaboration. • Work independently and be responsible for tasks from mockup to production.