Cactus

Kernels & Engine for running AI on phones

AI Research Engineer

$120K - $180K0.10% - 1.00%San Francisco, CA, US / Remote (San Francisco, CA, US)
Job type
Full-time
Role
Engineering, Machine learning
Experience
Any (new grads ok)
Visa
US citizenship/visa not required
Skills
Torch/PyTorch, C++, Python, Machine Learning, Deep Learning
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Henry Ndubuaku
Henry Ndubuaku
Founder

About the role

Company Description

Cactus is a cross-platform open-source framework for running AI models locally on smartphones. Cactus ships Kernels & AI engine for running AI locally on mobile devices; CUDA for phones. App developers can now deploy AI models locally in their mobile apps. Cactus completed a highly oversubscribed fundraising round and now actively scaling the engineering team.

Role Description

AI Research Engineers read papers and replicate models/techniques in Cactus. They also build and maintain Python tools for porting JAX/PyTorch models to Cactus graphs. They synergize strong mathematical foundations, intimate understanding of machine learning frameworks and experience with foundation models. AI research engineers also work with model companies to get them started with Cactus. This role requires ownership and high sense of agency.

Qualifications

  • Masters/PhD degree in CS/Maths/AI/Physics, or relevant experience
  • Strong background in Python, PyTorch/JAX internals
  • Experience with deep learning and SOTA LLM/VLM/TTS
  • Experience with C++ and ml inference is preferred
  • Ability to work collaboratively in a team environment
  • A sense of urgency and interest in startups

Benefits:

  • $120,000 - $180,000 base salary
  • Generous equity based on experience
  • Health insurance, gym membership, etc.
  • Work at a YC startup experience

Cactus Repo: https://github.com/cactus-compute/cactus

About Cactus

Cactus is a cross-platform open-source framework for running AI models locally on smartphones. Cactus completed a highly oversubscribed fundraising round and now actively scaling the engineering team.

Cactus
Founded:2025
Batch:S25
Team Size:3
Status:
Active
Location:San Francisco
Founders
Henry Ndubuaku
Henry Ndubuaku
Founder
Roman Shemet
Roman Shemet
Founder