Backend Engineer _ AI Gateway- Bilingual (Korean/ English)

About the role

We are building an AI Gateway - a high-performance, secure intermediary layer that routes, inspects, and governs all traffic between enterprise clients and LLM/AI service providers. This role requires deep expertise in network programming, async Python, and cloud infrastructure to design and operate a latency-sensitive, policy-driven gateway that handles massive concurrent streaming connections at scale. What we are looking for Async Python & Network Programming (3 + yrs)

• Strong hands-on experience with asyncio, aiohttp/anyio, low-level TCP/UDP sockets, WebSocket & SSE servers, TLS handshake, connection-pooling, keep-alive, and zero-copy buffering. Streaming & Large-Payload Handling
• Ability to manage chunked transfer, bidirectional streaming, back-pressure and high-throughput data paths for real-time LLM inference. Protocol Knowledge
• Working familiarity with HTTP/2 & HTTP/3 (multiplexing, HPACK), gRPC, and occasional custom protocol parsers. FastAPI-Based Backend (3 + yrs)
• Design, develop and test production-grade REST/Streaming APIs; pragmatic use of Pydantic, dependency injection and OpenAPI docs. Containerization & Kubernetes
• Docker, AKS/EKS/GKE deployment experience; HPA/VPA scaling, rolling updates, and service-mesh (e.g., Istio/Envoy) basics. Async Messaging & Event-Driven Design
• Production use of Redis Streams, RabbitMQ or Kafka for decoupled task queues, retries and back-off logic. PostgreSQL & Vault
• Advanced query tuning, partitioning, PgBouncer pooling, plus HashiCorp Vault (dynamic secrets, transit encryption) for key management. Cloud Networking & Security
• L4/L7 load balancing, TLS termination, reverse-proxy (NGINX/Envoy), mTLS between services, and automated cert lifecycle (ACME/Let's Encrypt). IaC & CI/CD
• Terraform modules for multi-env infra, plus GitHub Actions/GitLab CI pipelines with container image scanning and canary/blue-green deployments.

Qualifications & Requirements

Enterprise Security Gateways

• Integration with CASB/DLP/WSS or similar edge-security platforms; centralized logging & audit trails. IAM & SSO
• Configuring Azure AD/Entra ID, Okta, SAML 2.0 or OIDC SSO flows; managing Conditional Access & SCIM provisioning. AI/LLM Pipelines
• Building prompt-engineering workflows, PII anonymisation, and monitoring Azure OpenAI (or comparable) usage, rate limits & cost. API-Gateway Operations
• Custom webhook/REST integrations, circuit-breaker patterns, rate-limiting, auto-retry and health-checking. Observability & FinOps
• End-to-end monitoring with Datadog, Prometheus/Grafana or Azure Monitor; proactive cost-optimisation and 24/7 incident response (SLA/SLO). Bilingual Korean Highly Prefer

Additional Information

All your information will be kept confidential according to EEO guidelines. NO C2C