Backend Engineer - AI Gateway (Bilingual Korean)

Cinter Technology Services; Plano (TX); On-site; USD 100,000 - 130,000; Part time

Benefits offered by this job

Insurance

401K

Job summary

Korean IT Services and IT Consulting is seeking a Backend Engineer to join an AI Gateway project onsite in Plano, TX. The role focuses on building a high-performance, secure intermediary layer between enterprise clients and AI providers.

Requires deep expertise in async Python, network programming, FastAPI and cloud infrastructure, with experience in Docker, Kubernetes, and streaming data at scale. Onsite, 1-year contract; visa not supported.

Qualifications

• 3+ years in async Python and network programming.
• Experience with real-time streaming and large payloads.
• Familiarity with HTTP/2/HTTP/3 and gRPC.
• Backend design with FastAPI and OpenAPI.
• Containerization and Kubernetes operations.
• Experience with distributed messaging systems.
• Knowledge of PostgreSQL and Vault for secrets.
• Cloud networking and TLS/security practices.
• IaC and CI/CD with Terraform and GitHub Actions.

Skills

Async Python

Network Programming

Streaming & Large payloads

HTTP/2 & HTTP/3 (gRPC)

FastAPI Backend

Docker & Kubernetes

Redis Streams / Messaging

Kafka / RabbitMQ

PostgreSQL & Vault

Cloud Networking & TLS

Tools

Terraform

GitHub Actions

Envoy

NGINX

Job description

Job Details

• Job Title: Backend Engineer - AI Gateway
• Client: Korean IT Services and IT Consulting
• Working Location: NJ then Plano TX
• Working Style: Onsite
• Employment Type: 1 year Contract / W-2
• Salary: $100,000 - 130,000/year (DOE)
• Benefit: Insurance and 401K March
• Visa Support: No
• Working Hours: 9AM to 6PM
• Language: English andBilingual Korean Highly Preferred

Position Summary

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.

The Right Candidate Will Possess

A proactive, detail-oriented professional with strong communication, ownership, and problem-solving skills who can collaborate effectively across business and technical teams.

Required Qualifications & Skills

• AsyncPython & 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’sEncrypt).
• IaC & CI/CD – Terraform modules for multi‑env infra, plus GitHub Actions/GitLab CI pipelines with container image scanning and canary/blue‑green deployments.

Preferred Qualifications

• 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, SAML2.0 or OIDC SSO flows; managing Conditional Access & SCIM provisioning.
• AI/LLM Pipelines – Building prompt‑engineering workflows, PII anonymization, 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‑optimization and 24/7 incident response (SLA/SLO).
• Bilingual Korean Highly Preferred