Backend Engineer - Python

Ethereum Technologies LLC; Dallas (TX); On-site; USD 120,000 - 150,000; Full time

Job summary

A tech company in Dallas, Texas, is seeking an experienced backend developer with over 8 years in Python to develop and maintain essential tools for AI systems. Responsibilities include managing database systems, ensuring safe AI operations, and implementing complex reasoning frameworks. Candidates should be proficient in various tools, including FastAPI and Docker. This is an opportunity to work with cutting-edge technology while adhering to ethical standards in AI development.

Qualifications

• 8+ years of professional experience with Python, specifically in FastAPI, Pydantic, and Asyncio.
• Hands-on experience with AI frameworks like LangChain or LlamaIndex.
• Proficiency in PostgreSQL and experience with Vector Databases.

Responsibilities

• Develop and maintain backend tools that AI agents use to perform tasks.
• Use frameworks to implement complex reasoning chains and multi-agent coordination.
• Build and optimize data ingestion systems using Vector Databases.

Skills

Python Expertise

AI Frameworks

Database Management

Cloud & DevOps

Scalability

Version Control

Tools

FastAPI

Pydantic

Asyncio

Docker

Kubernetes

PostgreSQL

Job description

Responsibilities

• Agent Logic & Tooling:Develop and maintain the backend "tools" (APIs, scrapers, database connectors) that AI agents use to perform tasks.
• Orchestration Implementation:Use frameworks like LangChain, LangGraph, or CrewAIto implement complex reasoning chains and multi-agent coordination.
• RAG Pipeline Engineering:Build and optimize data ingestion and retrieval systems usingVector Databases, ensuring the agent has the right context at the right time.
• Asynchronous Task Management:Manage long-running AI reasoning cycles using asynchronous Python (FastAPI/Asyncio) and task queues like Celery or Redis.
• API Architecture:Design and implement secure, high-performance REST or GraphQL APIs that serve as the interface between the agentic backend and the frontend.
• Safety & Guardrails:Implement backend-level validation and guardrails to ensure that autonomous agent actions remain within secure and ethical boundaries.

Technical Requirements

• Python Expertise:8+ years of professional experience withPython, specifically withFastAPI, Pydantic, and Asyncio.
• AI Frameworks:Hands-on experience withLangChainorLlamaIndex.
• Database Management:Proficiency inPostgreSQLand experience withVector Databases.
• Cloud & DevOps:Experience deploying containerized applications usingDockerandKuberneteson AWS, Azure, or GCP.
• Scalability:Understanding of distributed systems and how to handle the high latency and compute requirements of LLM-based applications.
• Version Control:Mastery of Git and CI/CD best practices.

Preferred Qualifications

• Knowledge ofPrompt Engineeringfrom a programmatic perspective (dynamic prompt templating).
• Familiarity with observability tools for AI, such asLangSmithorArize Phoenix.

ETHEREUM 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. ETHEREUM 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 ETHEREUM 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