Backend Engineer - Python

Job Overview

• Job : J52785
• Job Title:
  
  Backend Engineer - Python
• Location:
  
  Dallas, TX
• Duration: 21 Months + Extension
• Hourly Rate:
  Depending on Experience (DOE)
• Work Authorization: US Citizen, Green Card, OPT-EAD, CPT, H-1B, H4-EAD, L2-EAD, GC-EAD
• Client:
  To Be Discussed Later
• Employment Type:
  
  W-2, 1099, C2C

• Develop and maintain backend tools (APIs, scrapers, database connectors) that AI agents use to perform tasks.
• Implement complex reasoning chains and multi‑agent coordination using frameworks such as Lang Chain, Lang Graph, or CrewAI.
• Build and optimize data ingestion and retrieval systems using vector databases to ensure the agent has the right context at the right time.
• Manage long‑running AI reasoning cycles with asynchronous Python (FastAPI/Asyncio) and task queues like Celery or Redis.
• Design and implement secure, high‑performance REST or GraphQL APIs that serve as the interface between the agentic backend and the frontend.
• Implement backend‑level validation and guardrails to keep autonomous agent actions within secure and ethical boundaries.

• 8+ years of professional experience with Python, specifically FastAPI, Pydantic, and Asyncio.
• Hands‑on experience with Lang Chain or Llama Index.
• Proficiency in PostgreSQL and experience with vector databases.
• Experience deploying containerized applications using Docker and Kubernetes on AWS, Azure, or GCP.
• Understanding of distributed systems and how to handle the high latency and compute requirements of LLM‑based applications.
• Mastery of Git and CI/CD best practices.

• Knowledge of prompt engineering from a programmatic perspective (dynamic prompt templating).
• Familiarity with observability tools for AI, such as Lang Smith or Arize Phoenix.

MACHINE LEARNING TECHNOLOGIES LLC is an equal opportunity employer inclusive of female, minority, disability and veterans (M/F/D/V). Hiring, promotion, transfer, compensation, benefits, discipline, termination and all other employment decisions are made without regard to race, color, religion, sex, sexual orientation, gender identity, age, disability, national origin, citizenship/immigration status, veteran status or any other protected status. MACHINE LEARNING TECHNOLOGIES LLC will not make any posting or employment decision that does not comply with applicable laws relating to labor and employment, equal opportunity, employment eligibility requirements or related matters.

Nor will MACHINE LEARNING TECHNOLOGIES LLC require in a posting or otherwise U.S. citizenship or lawful permanent residency in the U.S. as a condition of employment except as necessary to comply with law, regulation, executive order, or federal, state, or local government contract.