Senior Tech Mobile Agentic AI Developer

ZealHire Inc.; St. Louis, Northern (MO, KY); Ibrido; USD 120.000 - 210.000; Tempo pieno

Descrizione del lavoro

ZealHire Inc. seeks a Senior Tech Mobile Agentic AI Developer to design and deploy LLM-powered agents and multi-agent orchestration pipelines for field technicians, on a contractual basis in St. Louis, MO.

You will work with the platform team to build real-time streaming, tool-calling agents, and robust AI workflows. Ideal candidates have 10+ years of Python production experience, 2+ years in LLM development with LangChain/LangGraph, and strong system design skills.

Competenze

• 10+ years of software development in production environments.
• 2+ years of hands-on LLM development with LangChain/LangGraph or equivalents.
• RAG pipelines with embeddings, vector search, re-ranking, and answer generation.
• LLM APIs including OpenAI Chat Completions, streaming, tool calling.
• Async Python with asyncio/httpx/FastAPI.
• Prompt engineering with system prompts and JSON outputs.
• PostgreSQL async ORMs with CI/CD basics.
• Git, CI/CD, Docker, Kubernetes fundamentals.
• Strong microservices and distributed systems design skills.

Mansioni

• Design and implement LLM-powered agents and multi-agent orchestration pipelines.
• Develop real-time streaming capabilities (WebSocket/SSE) for conversational AI.
• Integrate with Azure OpenAI APIs and implement circuit breakers and fallbacks.
• Build and deploy RAG pipelines with hybrid search and RR Fusion.
• Write production-grade Python with robust logging, observability, and tests.
• Review code and participate in architectural discussions and sprints.

Conoscenze

Python

LLM development

RAG pipelines

LLM APIs

Async Python

Prompt engineering

Resilient service design

PostgreSQL async

Git CI/CD

Docker/Kubernetes

System design

Strumenti

LangChain

LangGraph

Azure OpenAI

FastAPI

PostgreSQL

OpenSearch

WebSocket

SSE

SQLAlchemy async

Alembic

Docker

Kubernetes

Descrizione del lavoro

Senior Tech Mobile Agentic AI Developer | JPC-8698

USC/GC/GC-EAD/H4-EADNeed LinkedIn, VISA DL

Location: St. Louis, MO (onsite client interview and worksite)

Interview process: First round is a video interview, and the second round is an in-person interview at the Charter Communications office. local St. Louis, MO candidates.

Role Summary:

We are looking for a skilled AI/ML Developer to join our agentic platform team on a contractual basis. You will design, develop, and deploy LLM-powered agents and pipelines that directly serve field technicians in production. You will work closely with the platform architect and contribute to the core multi-agent orchestration system.

Key Responsibilities:

• Design and develop LLM-powered agents using LangGraph and LangChain frameworks
• Build and enhance multi-agent orchestration pipelines with conditional routing, state management, and error recovery
• Develop RAG pipelines with hybrid search (semantic + keyword), re-ranking, and Reciprocal Rank Fusion
• Implement tool-calling agents with parallel API execution, sequential enrichment chains, and summarization
• Build real-time streaming capabilities (WebSocket / SSE) for conversational AI
• Integrate with Azure OpenAI APIs with circuit breaker patterns and fallback chains
• Implement prompt engineering and dynamic prompt management (DB-backed with in-memory caching)
• Design and implement multi-modal AI features (image analysis with vision models)
• Write production-quality Python code with error handling, logging, observability, and unit tests
• Participate in code reviews, architecture discussions, and sprint delivery

Required Skills & Experience

Must-Have

• 10+ years of software development with strong Python expertise in production environments
• 2+ years of hands‑on LLM development (LangChain, LangGraph, or equivalent frameworks)
• RAG pipeline experience - embeddings, vector search, re-ranking, answer generation
• LLM APIs - OpenAI Chat Completions, Responses API, streaming, tool calling
• Async Python - asyncio, httpx, FastAPI
• Prompt engineering - system prompts, few-shot, structured JSON output
• Circuit breaker patterns, retry logic, resilient service designPostgreSQL and async ORMs (SQLAlchemy async / Alembic)
• Git, CI/CD, Docker, Kubernetes basics
• Strong system design skills - microservices, distributed systems, API design

Nice-to-Have

• LangGraph StateGraph (conditional edges, node pipelines, compiled graphs)
• Multi-agent systems - orchestration, routing, RBAC-based access control
• Langfuse or similar LLM observability (tracing, token usage, latency)
• WebSocket and SSE streaming protocols
• Multi-modal AI (vision models, image analysis)
• Vector databases (OpenSearch, Pinecone, pgvector)
• AWS services (Aurora PostgreSQL, SSM, IAM, EKS)
• Telecommunications or field service domain experience

Tech Stack

Category Technologies

Language Python 3.11+

Frameworks: FastAPI, LangChain, LangGraph

LLM APIs Azure OpenAI (GPT-4)

Databases: PostgreSQL (Aurora), OpenSearch (vector)

Messaging: WebSocket, SSE, REST

Observability: Langfuse, Datadog, Splunk

Infrastructure: Docker, Kubernetes (EKS), AWS

CI/CD GitLab CI, Helm, ArgoCD

Package Mgmt: uv (Python), pyproject.toml

Testing pytest, unittest, FastAPI TestClient

TechMobile Agentic AI Platform | Charter Communications

$000,000 – $000,000 Salary range is not shown on the candidate portal