Senior AI Engineer: LLMs, RAG & AI-Driven Apps

Quantum Technologies. LLC; San Diego (CA); On-site; USD 150,000 - 210,000; Full time

Job summary

Quantum Technologies LLC is seeking a highly hands-on Senior AI Engineer to independently design, build, test, and deliver enterprise-grade AI applications from concept to deployment-ready software in San Diego.

You will architect end-to-end AI-powered applications, develop solutions using LLMs, RAG, AI agents, embeddings and vector search, and build agentic workflows integrating enterprise apps, APIs, tools and data sources. Experience with Harness CI/CD is essential.

Qualifications

• Hands-on experience with AI frameworks such as LangChain, LangGraph, LlamaIndex, Semantic Kernel or equivalent.
• Strong understanding of LLMs, RAG, agentic AI, prompt/context engineering and model integration.
• Experience with OpenAI, Azure OpenAI, Anthropic, Gemini, AWS Bedrock or comparable model platforms.
• Experience with SQL/NoSQL databases and vector databases.
• Strong API, microservices, Docker and Kubernetes knowledge.
• Strong hands-on Harness CI/CD, pipeline-as-code/YAML, services, environments, connectors and pipeline troubleshooting experience.
• Experience with Harness Skills and AI-assisted software delivery strongly preferred.

Responsibilities

• Architect and build end-to-end AI-powered applications (UI, backend, APIs, data, AI layers).
• Develop solutions using LLMs, Generative AI, RAG, AI agents, embeddings, vector search.
• Build agentic workflows integrating enterprise apps, APIs, tools and data sources.
• Develop scalable APIs, microservices and cloud-native apps.
• Implement automated unit, integration, and AI application testing.
• Use AI coding tools (e.g., GitHub Copilot, Claude Code, Cursor) to accelerate engineering.
• Build and maintain CI pipelines and services using Harness.
• Collaborate with platform engineering to ensure security, observability, production readiness.

Skills

LangChain

LLMs

RAG

Agentic AI

Harness CI/CD

Docker

Kubernetes

API design

Vector databases

Tools

OpenAI

Azure OpenAI

Anthropic

Gemini

AWS Bedrock

Job description

Quantum Technologies LLC is seeking a highly hands-on Senior AI Engineer to independently design, build, test, and deliver enterprise-grade AI applications from concept to deployment-ready software in San Diego.

You will architect end-to-end AI-powered applications, develop solutions using LLMs, RAG, AI agents, embeddings and vector search, and build agentic workflows integrating enterprise apps, APIs, tools and data sources. Experience with Harness CI/CD is essential.