Jobs

Senior Tech Mobile Agentic AI Developer

Zenith Algorithms

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Location
St. Louis, MO, US
Track
AI Agent Engineer
Level
Senior
Salary
$125K–$135K / yr
Posted
September 30, 2026
Source
Indeed

Job description

Core Technical Must-Haves

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

. Key Role Responsibilities Fit

  • Experience designing & developing LLM-powered agents and multi-agent orchestration pipelines (conditional routing, state management, error recovery)
  • Built real-time streaming capabilities (WebSocket / SSE) for conversational AI
  • Implemented tool-calling agents (parallel API execution, sequential enrichment, summarization)
  • Experience with multi-modal AI features (vision models / image analysis) is a plus
  • Writes production-quality Python code (error handling, logging, observability, unit tests)
  • Comfortable participating in code reviews, architecture discussions, and sprint delivery

. Nice-to-Have Skills (strong differentiators)

  • Deep LangGraph experience (StateGraph, conditional edges, node pipelines, compiled graphs)
  • Multi-agent systems (orchestration, routing, RBAC-based access control)
  • LLM observability tools (Langfuse or similar – 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 Alignment

  • Python 3.11+
  • FastAPI, LangChain, LangGraph
  • Azure OpenAI (GPT-4)
  • PostgreSQL (Aurora), OpenSearch (vector)
  • WebSocket, SSE, REST
  • Observability: Langfuse, Datadog, Splunk
  • Docker, Kubernetes (EKS), AWS
  • GitLab CI, Helm, ArgoCD
  • pytest / unittest

. Soft Skills & Delivery Style

  • Hands-on production developer (not just prototyping)
  • Ability to work closely with platform architect on core multi-agent orchestration
  • Experience building systems that serve real users at scale (this platform handles 40,000+ daily interactions)

Pay: $60.00 - $65.00 per hour

Work Location: In person

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