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 (15)
lora10
fine-tuning9
llm9
gpt9
transformers9
pytorch9
llama8
llm-inference8
llmops8
private-key6
agent3
ssh-agent3
buildkit3
ssh3
docker3
Programming languages (2)
Github contributions (2)
predibase/lorax
Sep 2024 - Feb 2025
Multi-LoRA inference server that scales to 1000s of fine-tuned LLMs
Contributions:9 reviews, 15 PRs, 30 pushes in 4 months
fine-tuninggptllamallmllm-inference
webfactory/ssh-agent
May 2024 - May 2024
GitHub Action to setup `ssh-agent` with a private key
Contributions:1 issue in 1 day
ssh-agentagentprivate-keybuildkitssh
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