xAI · 4 months ago
Member of Technical Staff, JAX & Compiler
San Francisco & Palo Alto, CA
Full-time
Onsite
Mid Level
$180K/yr - $440K/yrxAI is on a mission to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. They are seeking a Member of Technical Staff to develop in-house JAX or compiler/runtime features for high-performance large-scale LLM training and to innovate tooling for debugging distributed programs. The ideal candidate should have strong communication skills and be hands-on in contributing directly to the company’s mission.
Artificial Intelligence (AI)Foundational AIGenerative AIInformation TechnologyMachine Learning
Responsibilities
Develop in-house JAX or compiler/runtime features to fulfill the need of our high-performance large-scale LLM training with different hardware architecture (Hopper, Grace Blackwell)
Develop and use innovative toolings for debugging distributed programs, profiling train steps and memory consumptions over time
Understand CUDA runtime and its interactions with upper-level framework
Support a wide range of cutting-edge LLM research/production tasks
Qualification
Required
Strong communication skills
Hands-on experience with Python and C++
Deep knowledge of JAX core and its interaction with the XLA compiler and runtime
Strong understanding of compiler optimizations (e.g., memory assignment, scheduling, fusions)
Proficiency with distributed profiling tools like xprof
Hands-on experience training large-scale LLMs with JAX (on GPU or TPU)
Experience applying various parallelism strategies to complex use cases
Practical experience with kernel compilers such as Triton, Pallas, Mosaic, or CuteDSL
Excellent communication skills for close collaboration with pretraining and reasoning teams
Benefits
Equity
Comprehensive medical, vision, and dental coverage
Access to a 401(k) retirement plan
Short & long-term disability insurance
Life insurance
Various other discounts and perks
Company
xAI
XAI is an artificial intelligence startup that develops AI solutions and tools to enhance reasoning and search capabilities.
Founded in 2023
11-50 employees
H1B Sponsorship
xAI has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1)
Funding
Current Stage
Late StageTotal Funding
$42.73BKey Investors
Neptune Digital AssetsSpaceXMorgan Stanley
2026-01-06Series E· $20B
2025-12-11Secondary Market· $0.3M
2025-07-13Corporate Round· $5.32B
Leadership Team
Toby Pohlen
Founding Member
Recent News
Analytics Insight: Latest AI, Crypto, Tech News & Analysis
2026-01-19
2026-01-19
2026-01-19
Company data provided by crunchbase