Senior AI Engineer - LLM & RAG Solutions

Ethereum Technologies; St. Louis (MO); On-site; USD 140,000 - 200,000; Full time

Job summary

Ethereum Technologies in St. Louis, MO, seeks an experienced AI Developer to design, develop, and deploy enterprise-grade AI solutions.

The ideal candidate will build Generative AI and LLM-based applications, integrate AI services into complex enterprise platforms, and deliver scalable cloud-native solutions that are secure and production-ready. You will collaborate with architects, product owners, and engineering teams to define AI use cases, design robust RAG pipelines, and implement REST APIs

Qualifications

• 7+ years of software development experience.
• 2+ years with Generative AI/LLM app development.
• Strong Python and/or Java skills.
• Experience with OpenAI or similar LLM platforms.
• Experience building AI apps with LangChain, etc.
• Understanding of RAG, prompts, and vector databases.
• Experience developing REST APIs and cloud exposure.
• Knowledge of Docker, Kubernetes, CI/CD, Git.
• Familiarity with SQL/NoSQL and vector DBs.
• Strong debugging and communication skills.

Responsibilities

• Design and develop AI-powered applications using Large Language Models (LLMs).
• Build and optimize RAG pipelines and AI agent workflows.
• Integrate AI services into enterprise applications and APIs.
• Develop scalable backend services for AI solutions.
• Collaborate with architects, product owners, and business stakeholders to define AI use cases.
• Optimize AI model performance, cost, and response quality.
• Ensure security, governance, and compliance for AI implementations.
• Participate in code reviews, testing, and production deployments.
• Document AI solutions and mentor junior developers when needed.

Skills

Software dev

Generative AI

Python/Java

LLM platforms

RAG/Vector DB

REST APIs

Cloud platforms

Docker/Kubernetes

SQL/NoSQL

Debugging/Communication

Tools

LangChain/LangGraph

Semantic Kernel

LlamaIndex

FastAPI/Flask

Spring Boot

Azure/AWS/GCP

Job description

Ethereum Technologies in St. Louis, MO, seeks an experienced AI Developer to design, develop, and deploy enterprise-grade AI solutions.

The ideal candidate will build Generative AI and LLM-based applications, integrate AI services into complex enterprise platforms, and deliver scalable cloud-native solutions that are secure and production-ready. You will collaborate with architects, product owners, and engineering teams to define AI use cases, design robust RAG pipelines, and implement REST APIs