Joseph Barker
Staff Software Engineer at Rubrik
Portland, Oregon, United States
Summary
🤩
Rockstar🎓
Top SchoolJoseph Barker is a Staff Software Engineer based in Portland with a PhD in Computer Science from UCLA and a strong track record building large-scale, production-ready distributed systems in C++, Java, and Go. He has driven high-impact platform and routing work at Uber and Twitter, and more recently led backend and deployment infrastructure for open-source LLM serving at Predibase (now part of Rubrik). Comfortable at both startup and hyperscale pace, he’s improved reliability and on-call practices, built dynamic config and Kubernetes-based serving stacks, and shipped novel ML tooling at seed-stage Companion. His background in heuristic search and scheduling informs pragmatic, algorithmic approaches to system design, enabling measurable improvements in latency, robustness, and operational simplicity.
2 years of coding experience
17 years of employment as a software developer
Bachelor’s Degree Computer Science, Bachelor’s Degree Computer Science at University of OregonUniversity of California, Los Angeles
Github Skills (26)
transformers10
pytorch10
python10
langchain10
load-balancing10
llm10
nvidia10
openai10
gateway10
llmops10
ai10
fine-tuning10
azure-openai10
vertex-ai10
lora10
Programming languages (2)
Github contributions (5)
predibase/litellm
Mar 2026 - Jul 2026
Contributions:33 pushes, 3 branches in 4 months
seph-barker/aichat
May 2025 - May 2025
All-in-one LLM CLI tool featuring Shell Assistant, Chat-REPL, RAG, AI Tools & Agents, with access to OpenAI, Claude, Gemini, Ollama, Groq, and more.
Contributions:1 push, 1 branch in 1 day
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