Joel Christner
Chief Technology Officer, Architect, Open Source Developer
I build infrastructure software and developer tools, with deep expertise in distributed systems, messaging and networking, artificial intelligence, data storage and retrieval, and cloud-native architectures. MS Computer Science from Columbia University. .NET Foundation member with 13M+ package downloads. BJJ black belt. Based in California.
Open Source
AssistantHub
Self-hosted RAG platform for creating AI assistants grounded in uploaded documents with vector embeddings and hybrid search.
Opinionated data persistence and retrieval layer on top of pgvector for AI and RAG use cases with intelligent multi-modal retrieval.
Multi-tenant RESTful platform for semantic cells with chunking, embedding configuration, and computed embeddings.
Light, fast library for breaking input documents into constituent parts (atoms) for text processing, analysis, and AI.
OllamaFlow
Load balancer for Ollama with model management across server fleets.
FastAPI-like experience for C# developers building web APIs.
Multi-tenant platform for orchestrating AI models with OpenAI and Ollama-compatible APIs.
Property graph database with support for relationships, tags, metadata, vectors, and AI/LLM integration.
Modern JSON-RPC 2.0 and Model Context Protocol (MCP) implementation for .NET with multiple transports.
Lightweight application proxy combining reverse proxy and API gateway functionality.
Workload placement platform for exactly-one placement patterns in distributed systems.
The fastest, easiest way to build TCP-based clients and servers in C#. Message framing, SSL/TLS, sync/async.
Embeddable, fast async RESTful HTTP/HTTPS server with multiple routing options and OpenAPI support.
Simple, fast WebSocket server and client library for .NET applications.
Publications & Patents
Deploying Cisco Wide Area Application Services
Application Acceleration and WAN Optimization Fundamentals
Storage Networking Protocol Fundamentals
Patents
Dozens of patents filed and issued in artificial intelligence, machine learning, data management, distributed systems, compression, serverless computing, and cloud-native architectures.
Industry Leadership
Distinguished Engineer & Director
Office of the CTO, Research. AI, next-generation storage, data management, and distributed systems.
Technical Leader
Cross-product architecture for WAN optimization, application acceleration, and data center switching platforms.
Multiple Startups & Exits
Leadership in multiple ventures acquired by Microsoft, Palo Alto Networks, Sysco Foods, Rocket Lawyer, and McAfee.
.NET Foundation Member
Repository and package owner, author, and contributor for the .NET open source ecosystem.
SNIA DNA Data Storage Alliance
Chair of Standard CODECs and Rosetta Stone working groups. Authored the first two standards on DNA data storage.