Software Engineer, Imagine Model
Quick Summary
ABOUT xAI xAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering excellence.
Create and drive engineering agendas to advance multimodal capabilities, with emphasis on image and video generation, editing, understanding, controllable/long-horizon synthesis, agentic planning, RL training, and world simulation (including audio…
SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today, SpaceX is actively developing the technologies to make this possible, with the ultimate goal of making life multiplanetary and expanding consciousness to the stars.
SpaceXSI is building Super Intelligence to help humanity understand the universe. Our teams are building the full Super Intelligence stack: from our Colossus supercomputers, to Grok models, to our suite of applications, including Grok Bot, Grok Build, Grok Imagine, Grok Voice, and X. We're creating a powerful flywheel where more compute trains better models, better models power more useful products, and what we learn from people using those products shapes what we build next.
As a multimodal engineer on the Imagine Model Team, you will develop cutting-edge AI experiences beyond text, with a strong focus on enabling high-fidelity understanding and generation across image and video modalities, while also incorporating audio where it enhances visual content (e.g., synchronized audio for video). Responsibilities span data curation, modeling, training, inference serving, and product integration, covering both pre-training and post-training phases. You will collaborate closely with product teams to push model frontiers and deliver exceptional end-to-end user experiences.
Responsibilities
~1 min read- →Create and drive engineering agendas to advance multimodal capabilities, with emphasis on image and video generation, editing, understanding, controllable/long-horizon synthesis, agentic planning, RL training, and world simulation (including audio integration for richer video experiences)
- →Improve data quality through annotation, filtering, augmentation, synthetic generation, captioning, and in-depth data studies, particularly for visual and audio data
- →Design evaluation frameworks, metrics, benchmarks, evals, and reward models tailored to image/video/audio quality and coherence
- →Implement efficient algorithms for state-of-the-art model performance, including real-time inference, distillation, and scalable serving for visual content
- →Develop scalable data collection and processing pipelines for multimodal (primarily image/video-focused) datasets
- →Collaborate cross-functionally to integrate AI solutions into production and rapidly iterate based on user feedback
Requirements
~1 min read- Experience in data-driven experiment designs, systematic analysis, and iterative model debugging
- Experience developing or working with large-scale distributed machine learning systems
- Experience with leading studies that significantly improve neural network capabilities and performance through better data or modeling
- Ability to deliver optimal end-to-end user experiences
- Hands-on contributor with initiative, excellence, strong work ethic, prioritization skills, and excellent communication
- Experience in SFT, RL, evals, human/synthetic data collection, or agentic systems
- Proficiency in Python, JAX/XLA, PyTorch, Rust/C++, Spark, Ray, and related large-scale frameworks
- Domain expertise in multimodal applications such as graphics engines, rendering techniques, image/video understanding and generation, world models, real-time simulation, or controllable/long-horizon visual content creation (audio/speech processing or music/audio generation experience is a plus where it supports video)
- Experience with agentic RL training, controllable/long-horizon generation, or multimodal agents that reason and act across modalities (especially in visual domains)
What We Offer
~1 min read$180,000 - $440,000 USD
Base salary is just one part of our total rewards package at SpaceXSI, which also includes equity, comprehensive medical, vision, and dental coverage, access to a 401(k) retirement plan, short & long-term disability insurance, life insurance, and various other discounts and perks.
SpaceXSI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.
Location & Eligibility
About this job
- Pay per year
- $180,000–$440,000 a year
- 64% above the $189,182 median for Software Engineer jobs on Jobera (6,747 salaries).
- Who can apply
- United States
- Posted
- 218 days ago
Listing Details
- First seen
- March 26, 2026
- Last seen
- October 31, 2026
Posting Health
- Days active
- 218
- Repost count
- 0
- Trust Level
- 42%
- Scored at
- October 31, 2026
Signal breakdown
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