Software Engineer – Senior Backend

6 months ago

Seoul, Korea, SouthSenior

Responsibilities

Own the architecture and evolution of core backend microservices from API layer through business logic and data layer.
Design and build production-grade REST, gRPC, and GraphQL APIs for AI deployments, developer integrations, and enterprise workflows.
Build authentication, RBAC, billing, organization management, and secure multi-tenant SaaS capabilities.
Develop LLM deployment workflows and inference-specific service integrations.
Design and optimize data models and pipelines across PostgreSQL and ClickHouse systems.
Collaborate with infrastructure engineers on multi-cloud deployment and resource orchestration pipelines.
Set reliability and performance standards, resolve production issues, and drive engineering quality through design reviews, automated testing, and CI/CD.

At least 5 years of backend or systems engineering experience in production environments.
Bachelor's or Master's degree in Computer Science, Computer Engineering, or equivalent.
Expertise in Python and modern frameworks such as FastAPI.
Strong experience designing and operating distributed systems at scale.
Experience designing APIs with REST, gRPC, and GraphQL.
Proficiency in data modeling and SQL with hands-on PostgreSQL and OLAP experience such as ClickHouse.
Working knowledge of LLM serving and experience building secure, multi-tenant SaaS architectures.
Familiarity with cloud-native development and observability tooling such as OpenTelemetry or equivalent.
Strong systems thinking and ability to reason about failure modes.
Preferred experience includes AI or model-serving infrastructure, Kubernetes, developer-facing SDKs or CLIs, internal engineering platforms, multi-cloud resource management, incident response, production postmortems, and React or Next.js.

ClickHouseFastAPIGraphQLgRPCKubernetesNext.jsPostgreSQL Python React

51-200 employees