{"absolute_url":"https://job-boards.greenhouse.io/xai/jobs/5180223007","data_compliance":[{"type":"gdpr","requires_consent":false,"requires_processing_consent":false,"requires_retention_consent":false,"retention_period":null,"demographic_data_consent_applies":false}],"internal_job_id":4416134007,"location":{"name":"Palo Alto, California"},"metadata":[{"id":22659078007,"name":"Job Description via Google Doc URL [please share with Olivia]","value":null,"value_type":"short_text"},{"id":16340689007,"name":"Featured Role","value":null,"value_type":"yes_no"}],"id":5180223007,"updated_at":"2026-08-27T18:09:48-04:00","requisition_id":"230","title":"Member of Technical Staff - RL Inference","company_name":"SpaceXAI","first_published":"2026-07-06T10:59:58-04:00","language":"en","application_deadline":null,"content":"\u0026lt;div class=\u0026quot;content-intro\u0026quot;\u0026gt;\u0026lt;p\u0026gt;\u0026lt;span style=\u0026quot;font-family: arial, helvetica, sans-serif;\u0026quot;\u0026gt;SpaceXAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge.\u0026amp;nbsp;\u0026lt;/span\u0026gt;\u0026lt;span style=\u0026quot;font-family: arial, helvetica, sans-serif;\u0026quot;\u0026gt;Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. \u0026lt;/span\u0026gt;\u0026lt;span style=\u0026quot;font-family: arial, helvetica, sans-serif;\u0026quot;\u0026gt;We operate with a flat organizational structure. All employees are expected to be hands-on and to contribute directly to the company’s mission. Leadership is given to those who show initiative and consistently deliver excellence. Work ethic and strong prioritization skills are important. \u0026lt;/span\u0026gt;\u0026lt;span style=\u0026quot;font-family: arial, helvetica, sans-serif;\u0026quot;\u0026gt;All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates.\u0026lt;/span\u0026gt;\u0026lt;/p\u0026gt;\u0026lt;/div\u0026gt;\u0026lt;h3\u0026gt;\u0026lt;strong\u0026gt;ABOUT THE ROLE:\u0026lt;/strong\u0026gt;\u0026lt;/h3\u0026gt;\n\u0026lt;p\u0026gt;The RL infrastructure team is looking for an engineer to help with low precision RL training and inference.\u0026lt;/p\u0026gt;\n\u0026lt;p\u0026gt;\u0026lt;strong\u0026gt;RESPONSIBILITIES:\u0026lt;/strong\u0026gt;\u0026lt;/p\u0026gt;\n\u0026lt;ul\u0026gt;\n\u0026lt;li\u0026gt;Design and optimize our inference stack for all shapes of RL workloads at SpaceXAI, from small scale ablations to production training runs.\u0026lt;/li\u0026gt;\n\u0026lt;li\u0026gt;Analyze, profile and address performance bottlenecks in large scale RL systems\u0026lt;/li\u0026gt;\n\u0026lt;li\u0026gt;Work closely with the modelling team to efficiently implement novel RL techniques and algorithms\u0026lt;/li\u0026gt;\n\u0026lt;/ul\u0026gt;\n\u0026lt;h3\u0026gt;\u0026lt;strong\u0026gt;BASIC QUALIFICATIONS:\u0026lt;/strong\u0026gt;\u0026lt;/h3\u0026gt;\n\u0026lt;ul\u0026gt;\n\u0026lt;li\u0026gt;Experience in building, debugging, and optimizing efficiency of large-scale distributed systems\u0026lt;/li\u0026gt;\n\u0026lt;li\u0026gt;Experience in LLM inference\u0026lt;/li\u0026gt;\n\u0026lt;li\u0026gt;Proficiency in programming languages such as Python, C++ and/or Rust; frameworks such as PyTorch, Jax, CUDA\u0026lt;/li\u0026gt;\n\u0026lt;li\u0026gt;Willingness to dive deep and solve hardcore problems at all levels of the stack\u0026lt;/li\u0026gt;\n\u0026lt;/ul\u0026gt;\n\u0026lt;h3\u0026gt;\u0026lt;strong\u0026gt;PREFERRED SKILLS AND EXPERIENCE:\u0026lt;/strong\u0026gt;\u0026lt;/h3\u0026gt;\n\u0026lt;ul\u0026gt;\n\u0026lt;li\u0026gt;Strong knowledge in quantization and numerics in LLM inference and training\u0026lt;/li\u0026gt;\n\u0026lt;li\u0026gt;Experience in developing inference engines, e.g. SGLang, vLLM\u0026lt;/li\u0026gt;\n\u0026lt;/ul\u0026gt;\n\u0026lt;h3\u0026gt;\u0026lt;strong\u0026gt;COMPENSATION AND BENEFITS:\u0026lt;/strong\u0026gt;\u0026lt;/h3\u0026gt;\n\u0026lt;p\u0026gt;$180,000 - $440,000 USD\u0026lt;/p\u0026gt;\n\u0026lt;p\u0026gt;Base salary is just one part of our total rewards package at SpaceXAI, which also includes equity, comprehensive medical, vision, and dental coverage, access to a 401(k) retirement plan, short \u0026amp;amp; long-term disability insurance, life insurance, and various other discounts and perks.\u0026lt;/p\u0026gt;\u0026lt;div class=\u0026quot;content-conclusion\u0026quot;\u0026gt;\u0026lt;p\u0026gt;\u0026lt;em\u0026gt;SpaceXAI is an equal opportunity employer. For details on data processing, view our \u0026lt;/em\u0026gt;\u0026lt;em\u0026gt;\u0026lt;a href=\u0026quot;https://x.ai/legal/recruitment-privacy-notice\u0026quot; target=\u0026quot;_blank\u0026quot;\u0026gt;Recruitment Privacy Notice\u0026lt;/a\u0026gt;.\u0026lt;/em\u0026gt;\u0026lt;/p\u0026gt;\u0026lt;/div\u0026gt;","departments":[{"id":4064383007,"name":"Model","child_ids":[],"parent_id":4024733007}],"offices":[{"id":4035106007,"name":"Palo Alto, CA","location":"Palo Alto, California","child_ids":[],"parent_id":4054926007}],"ai_disclaimer":null,"include_ai_disclaimer":null,"ai_opt_out_request_url":null}