Founding Engineer -- AI Inference Stack

Piris Labs is hiring a Founding Engineer -- AI Inference Stack in San Francisco, CA. Full brief — comp band, interview process, and hiring team — available to Employbl members.

Location: San Francisco, CA
Company size: —
Posted: 1w ago
Via: Yc

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01Comp band & equity packageLocked
02Seniority & experience requirementsLocked
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Founding Engineer -- AI Inference Stack · Piris Labs

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Job title: Founding Engineer -- AI Inference Stack
Job location: San Francisco, CA, US
Job listing URL: https://www.ycombinator.com/companies/pirislabs/jobs/r6mskwZ-founding-engineer-ai-inference-stack
Job description: **The Role:** We are looking for elite systems hackers who want to own the software layer of a new architecture. You will be writing kernels and orchestration logic that outperform existing solutions. **What You Will Do:** * **Architect the Stack:** Iterate on our software layer that orchestrates inference across heterogenous cluster of compute resources. * **Kernel and Compiler Optimization:** Write and optimize high-performance kernels in CUDA, Triton, or custom targets to squeeze every drop of performance from the system. * **The Runtime:** Build the low-latency inference server, think a more performant custom version of vLLM or TensorRT-LLM, that manages KV cache at scale without the overhead of traditional PCIe bottlenecks. * **Voice and Agentic Optimization:** Solve the unique challenges of instant-on Voice AI, focused on latency, and the high-context demands of coding agents, focused on memory management. **Who You Are:** * **Curiosity-driven**, with a genuine passion for compute architectures and problem solving * **Systems Obsessed:** You have a deep understanding of computer architecture, memory hierarchies, and low-level systems programming in C++, Rust, or CUDA. * **AI Fluent:** You understand the guts of transformer architectures and have experience with inference frameworks like vLLM, TensorRT, ONNX, and Kubernetes. * **A First-Principles Thinker:** You are not afraid to throw out the standard way of doing things if it means achieving a 10x performance gain. **Why Piris Labs?** * **High Stakes, High Growth:** We are a small, elite team of builders from Meta and Twitter, trained at Stanford, Harvard, and MIT. No middle management. No alignment meetings. Just engineering. * **Venture Backed:** Backed by YC W26 and tier-1 VC firms. * **SF-Centric:** We work in person in San Francisco. This is where the density of AI talent is, and we thrive on the high-bandwidth collaboration of a physical lab. * **The Path to Full Time:** This internship is a trial run for a founding-level equity stake. We are looking for people to grow with us through our Series A and beyond.

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