poolside

About poolside

poolside is pursuing AGI. Only very few companies in the world are able to be in this race - we’re early in our journey which makes it a great time to join the team but we also have scale-up+ needs when it comes to product and engineering. We can tell you why over the phone...

About our team

We are a remote-first team that sits across Europe and North America. We come together once a month in-person for 3 days, always Monday-Wednesday. We also do longer off-sites twice a year.

Our team is a combination of more research and more engineering-oriented profiles, however, everyone deeply cares about the quality of the systems we build and has a strong underlying knowledge of software development. We believe that good engineering leads to faster development iterations, which allows us to compound our efforts.

About the role

Performance-oriented programming in CUDA, C++, Cython, Triton. You are going to accelerate high-level primitives used to train Large Language Models (LLMs) and optimize distributed communication over NVLink and InfiniBand. You will be working on poolside’s own implementation of distributed training for LLMs.

Your mission

Ensure cutting-edge performance of LLM pre-training and fine tuning on huge state-of-the-art GPU clusters.

Responsibilities

Profile CPU and CUDA code at several abstraction levels.
Debug and profile distributed applications.
Troubleshoot undocumented CUDA internals.
Hack the NCCL library used for GPU communication.
Tune vanilla CUDA, Triton, CUTLASS kernels for the latest NVIDIA GPUs.
Hack PyTorch internals.
Deep dive into InfiniBand RDMA, including SHARP.

Skills & Experience

Engineering background
Expert understanding of GPU hardware/architecture
Strong C/C++ programming skills
Fine-grained knowledge of CUDA programming
Strong algorithmic skills
System programming on Linux experience
Plus: knowledge of CPython internals and experience of native extension development
Plus: knowledge of InfiniBand internals
Plus: compiler development background

Process

Intro call with Eiso, our CTO & Co-Founder
Technical Interview(s) with one of our Founding Engineers
Team-fit call with Beatriz, our Head of People
Meet & greet call with the founders, Jason and Eiso, CEO and CTO respectively

Benefits

Fully remote work & flexible hours;
37 days/year of vacation & holidays;
Health insurance allowance for you and dependents;
Company-provided equipment;
Wellbeing, always-be-learning and home office allowances;
Frequent team get togethers in Paris;
Great diverse & inclusive people-first culture.