• Deliver High-Quality Code: Consistently submit well-documented, maintainable, and robust code through Pull Requests (PRs) that include comprehensive tests (unit, integration) and adhere to team coding standards and best practices. Aim for high test coverage (e.g., >80%) on new code. • Apply Strong Fundamentals: Design and implement features demonstrating strong understanding and application of software architecture principles (e.g., SOLID, clean architecture), efficient database design (schema, indexing, query optimization), and API best practices (RESTful design, security). • Leverage AI Tools Effectively: Integrate AI coding assistants and tools into your daily workflow to demonstrably improve development speed (e.g., reducing boilerplate, accelerating test writing, assisting debugging) without compromising code quality, maintainability, or introducing unnecessary complexity. Be prepared to share effective prompts and techniques. • Contribute to System Stability: Keep production rollback rate related to your contributions under 2% by enforcing comprehensive testing, leveraging CI/CD pipelines effectively, and adhering to established DevOps best practices. • Engage in Collaborative Development: Actively participate in code reviews, providing timely, constructive feedback based on engineering principles and best practices. Respond proactively to feedback on your own PRs, contributing positively to team velocity and knowledge sharing.

• 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

• 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