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🏢 Summary: Engineering role focused on building and operating large-scale search infrastructure and intelligent retrieval systems powered by machine learning and Grok integration. The position involves developing scalable search algorithms, training ranking models, and improving end-to-end search experiences for millions of users in a fast-paced environment. 🗂️ Requirements: Experience with Python, Experience with Go, Experience with Rust, Experience with vector databases or search indices, Experience with large-scale search systems, Experience with production ML systems, Ability to build and operate search infrastructure, Strong ownership and problem-solving skills, Ability to work in fast-paced environments, Strong communication skills 📃 Skills: Python, Go, Rust, ML, Search, Retrieval, Indexing, Ranking, Grok, Databases 🏢 Description: SpaceXAI'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. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. 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. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates. ABOUT THE ROLE: The X Search team is responsible for building and operating the core search engine that powers discovery on X. We own the full end-to-end search stack — from real-time retrieval and indexing to ranking and the end-user search experience. Our goal is to create the most relevant, fast, and intelligent search experience on the internet by combining state-of-the-art information retrieval systems with Grok's reasoning capabilities. RESPONSIBILITIES: - Build search and retrieval algorithms that scale to millions of users - Build and operate large scale search engine and search infrastructure - Train state of the art ML ranking models - Integrate Grok in search systems and products BASIC QUALIFICATIONS: - Tech Stack: Python, Go, Rust - Have worked with vector databases, search indices, or similar data stores for search applications - Have worked on large-scale search systems - Have deep experience building or working with production ML systems - Take full ownership of problems and learn whatever you need to solve them - Can move quickly in a fast-paced environment with shifting priorities and tight deadlines COMPENSATION AND BENEFITS - $180,000 - $440,000 USD - Base salary is just one part of the total rewards package, 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. SpaceXAI is an equal opportunity employer. For details on data processing, view the Recruitment Privacy Notice.

🏢 Summary: Role focused on building and operating large-scale search systems and ML-powered retrieval infrastructure for X. The position involves developing search algorithms, training ranking models, and integrating Grok capabilities into intelligent search experiences using modern backend technologies. 🗂️ Requirements: Experience with Python, Experience with Go, Experience with Rust, Experience with vector databases, Experience with search indices, Experience with large-scale search systems, Experience with production ML systems, Ability to build and operate search infrastructure, Strong ownership and problem-solving skills, Ability to work in fast-paced environments 📃 Skills: Python, Go, Rust, ML, Search, Retrieval, Indexing, Vector, Databases, Ranking, Infrastructure, Grok 🏢 Description: SpaceXAI'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. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. 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. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates. ABOUT THE ROLE: The X Search team is responsible for building and operating the core search engine that powers discovery on X. We own the full end-to-end search stack — from real-time retrieval and indexing to ranking and the end-user search experience. Our goal is to create the most relevant, fast, and intelligent search experience on the internet by combining state-of-the-art information retrieval systems with Grok's reasoning capabilities. RESPONSIBILITIES: - Build search and retrieval algorithms that scale to millions of users - Build and operate large scale search engine and search infrastructure - Train state of the art ML ranking models - Integrate Grok in search systems and products BASIC QUALIFICATIONS: - Tech Stack: Python, Go, Rust - Have worked with vector databases, search indices, or similar data stores for search applications - Have worked on large-scale search systems - Have deep experience building or working with production ML systems - Take full ownership of problems and learn whatever you need to solve them - Can move quickly in a fast-paced environment with shifting priorities and tight deadlines COMPENSATION AND BENEFITS - $180,000 - $440,000 USD - Base salary is just one part of the total rewards package, 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. SpaceXAI is an equal opportunity employer. For details on data processing, view the Recruitment Privacy Notice.

🏢 Summary: Role focused on building and operating large-scale search and retrieval systems that power discovery on X, including indexing, ranking, and ML-driven search experiences. The position involves developing scalable search infrastructure, training ranking models, and integrating Grok capabilities into production search systems in a fast-paced engineering environment. 🗂️ Requirements: Experience with Python, Experience with Go, Experience with Rust, Experience with vector databases, Experience with search indices, Experience with large-scale search systems, Experience with production ML systems, Ability to build scalable search and retrieval algorithms, Strong ownership and problem-solving skills, Ability to work in fast-paced environments, Strong communication skills 📃 Skills: Python, Go, Rust, ML, Search, Retrieval, Indexing, Ranking, Grok, Databases 🏢 Description: SpaceXAI'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. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. 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. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates. ABOUT THE ROLE: The X Search team is responsible for building and operating the core search engine that powers discovery on X. We own the full end-to-end search stack — from real-time retrieval and indexing to ranking and the end-user search experience. Our goal is to create the most relevant, fast, and intelligent search experience on the internet by combining state-of-the-art information retrieval systems with Grok's reasoning capabilities. RESPONSIBILITIES: - Build search and retrieval algorithms that scale to millions of users - Build and operate large scale search engine and search infrastructure - Train state of the art ML ranking models - Integrate Grok in search systems and products BASIC QUALIFICATIONS: - Tech Stack: Python, Go, Rust - Experience with vector databases, search indices, or similar data stores for search applications - Experience working on large-scale search systems - Deep experience building or working with production ML systems - Ability to take full ownership of problems and learn whatever is needed to solve them - Ability to move quickly in a fast-paced environment with shifting priorities and tight deadlines COMPENSATION AND BENEFITS: - $180,000 - $440,000 USD - Equity compensation - Comprehensive medical, vision, and dental coverage - 401(k) retirement plan - Short and long-term disability insurance - Life insurance - Additional discounts and perks SpaceXAI is an equal opportunity employer. For details on data processing, view the Recruitment Privacy Notice.

🏢 Summary: Opportunity to build and operate large-scale search systems powering discovery on X, including real-time retrieval, indexing, ranking, and ML-driven search experiences. The role focuses on developing scalable search infrastructure, training ranking models, and integrating Grok capabilities into search products. 🗂️ Requirements: Experience with Python, Experience with Go, Experience with Rust, Experience with vector databases, Experience with search indices, Experience with large-scale search systems, Experience with production ML systems, Ability to build scalable search and retrieval algorithms, Ability to operate large-scale search infrastructure, Strong ownership and problem-solving skills, Ability to work in fast-paced environments 📃 Skills: Python, Go, Rust, ML, Search, Retrieval, Indexing, Ranking, Grok, Databases 🏢 Description: ABOUT THE ROLE: The X Search team is responsible for building and operating the core search engine that powers discovery on X. The team owns the full end-to-end search stack — from real-time retrieval and indexing to ranking and the end-user search experience. The goal is to create a highly relevant, fast, and intelligent search experience by combining advanced information retrieval systems with Grok's reasoning capabilities. RESPONSIBILITIES: - Build search and retrieval algorithms that scale to millions of users - Build and operate large scale search engine and search infrastructure - Train state of the art ML ranking models - Integrate Grok in search systems and products BASIC QUALIFICATIONS: - Tech Stack: Python, Go, Rust - Experience with vector databases, search indices, or similar data stores for search applications - Experience working on large-scale search systems - Deep experience building or working with production ML systems - Ability to take full ownership of problems and learn necessary technologies to solve them - Ability to move quickly in a fast-paced environment with shifting priorities and tight deadlines COMPENSATION AND BENEFITS: - $180,000 - $440,000 USD - Equity package - Comprehensive medical, vision, and dental coverage - 401(k) retirement plan - Short and long-term disability insurance - Life insurance - Additional discounts and perks SpaceXAI is an equal opportunity employer. For details on data processing, view the Recruitment Privacy Notice.

🏢 Summary: Engineering role focused on building and operating large-scale search infrastructure and ML-powered retrieval systems for X. The position involves developing search algorithms, training ranking models, and integrating Grok capabilities into search products using modern backend and machine learning technologies. 🗂️ Requirements: Experience with Python, Experience with Go, Experience with Rust, Experience with vector databases, Experience with search indices, Experience with large-scale search systems, Experience with production ML systems, Ability to build scalable search infrastructure, Strong ownership and problem-solving skills, Ability to work in fast-paced environments 📃 Skills: Python, Go, Rust, ML, Search, Retrieval, Ranking, Databases, Indexing, Grok 🏢 Description: SpaceXAI'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. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. 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. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates. ABOUT THE ROLE: The X Search team is responsible for building and operating the core search engine that powers discovery on X. We own the full end-to-end search stack — from real-time retrieval and indexing to ranking and the end-user search experience. Our goal is to create the most relevant, fast, and intelligent search experience on the internet by combining state-of-the-art information retrieval systems with Grok's reasoning capabilities. RESPONSIBILITIES: - Build search and retrieval algorithms that scale to millions of users - Build and operate large scale search engine and search infrastructure - Train state of the art ML ranking models - Integrate Grok in search systems and products BASIC QUALIFICATIONS: - Tech Stack: Python, Go, Rust - Have worked with vector databases, search indices, or similar data stores for search applications - Have worked on large-scale search systems - Have deep experience building or working with production ML systems - Take full ownership of problems and learn whatever you need to solve them - Can move quickly in a fast-paced environment with shifting priorities and tight deadlines COMPENSATION AND BENEFITS: - $180,000 - $440,000 USD - Base salary is just one part of the total rewards package, 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. SpaceXAI is an equal opportunity employer. For details on data processing, view the Recruitment Privacy Notice.

🏢 Summary: Engineering role focused on building and operating large-scale search systems powering discovery on X, including retrieval, indexing, ranking, and ML-driven search experiences. The position involves developing scalable search infrastructure, training ranking models, and integrating Grok reasoning capabilities into search products. Candidates should have strong experience with production ML systems and large-scale search technologies. 🗂️ Requirements: Experience with Python, Experience with Go, Experience with Rust, Experience with vector databases or search indices, Experience building large-scale search systems, Experience with production ML systems, Ability to take ownership of technical problems, Ability to work in fast-paced environments with shifting priorities 📃 Skills: Python, Go, Rust, ML, Search, Retrieval, Indexing, Ranking, Databases, Infrastructure, Grok 🏢 Description: SpaceXAI'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. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. 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. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates. ABOUT THE ROLE: The X Search team is responsible for building and operating the core search engine that powers discovery on X. We own the full end-to-end search stack — from real-time retrieval and indexing to ranking and the end-user search experience. Our goal is to create the most relevant, fast, and intelligent search experience on the internet by combining state-of-the-art information retrieval systems with Grok's reasoning capabilities. RESPONSIBILITIES: - Build search and retrieval algorithms that scale to millions of users - Build and operate large scale search engine and search infrastructure - Train state of the art ML ranking models - Integrate Grok in search systems and products BASIC QUALIFICATIONS: - Tech Stack: Python, Go, Rust - Have worked with vector databases, search indices, or similar data stores for search applications - Have worked on large-scale search systems - Have deep experience building or working with production ML systems - Take full ownership of problems and learn whatever you need to solve them - Can move quickly in a fast-paced environment with shifting priorities and tight deadlines COMPENSATION AND BENEFITS: - $180,000 - $440,000 USD - Base salary is just one part of our total rewards package, 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. SpaceXAI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.

🏢 Summary: Opportunity to work on the most critical AI product and technical challenges in a hands-on engineering environment focused on truth-seeking AI. The role targets exceptional software engineers who thrive in meritocratic, high-performance teams and contribute directly to mission-critical projects. 🗂️ Requirements: Exceptional software engineering skills, Strong communication skills, Ability to work hands-on in a flat organizational structure, Strong prioritization and work ethic, Interest in truth-seeking AI, Ability to thrive in meritocratic environments 📃 Skills: AI, Software, Engineering 🏢 Description: SpaceXAI'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. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. 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. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates. ABOUT THE ROLE: You will work on the most critical product or technical challenge at any given time. You will get clarity on your first project before an offer. BASIC QUALIFICATIONS: You believe truth-seeking AI is the most important and challenging problem. You take pride in your work and thrive in meritocratic environments. You are an exceptional software engineer. COMPENSATION AND BENEFITS: $180,000 - $440,000 USD 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 & long-term disability insurance, life insurance, and various other discounts and perks. SpaceXAI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.

🏢 Summary: Opportunity to work on the company’s most critical AI product or technical challenges in a hands-on engineering environment focused on truth-seeking AI. The role targets exceptional software engineers who thrive in meritocratic, high-performance teams and offers strong compensation, equity, and comprehensive benefits. 🗂️ Requirements: Belief in truth-seeking AI, Exceptional software engineering skills, Ability to work in meritocratic environments, Strong work ethic, Strong prioritization skills, Strong communication skills, Hands-on contribution to technical projects 📃 Skills: AI, Software, Engineering 🏢 Description: SpaceXAI'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. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. 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. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates. ABOUT THE ROLE: You will work on the most critical product or technical challenge at any given time. You will get clarity on your first project before an offer. BASIC QUALIFICATIONS: You believe truth-seeking AI is the most important and challenging problem. You take pride in your work and thrive in meritocratic environments. You are an exceptional software engineer. COMPENSATION AND BENEFITS: $180,000 - $440,000 USD 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 & long-term disability insurance, life insurance, and various other discounts and perks. SpaceXAI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.

🏢 Summary: The role involves tackling the company’s highest-priority product or technical challenges in a hands-on engineering environment focused on truth-seeking AI. Candidates are expected to be exceptional software engineers who thrive in meritocratic, high-performance teams with strong communication and prioritization skills. 🗂️ Requirements: Exceptional software engineering skills, Strong communication skills, Ability to work hands-on in a flat organizational structure, Strong prioritization skills, Ability to thrive in meritocratic environments, Interest in truth-seeking AI challenges 📃 Skills: AI, Software, Engineering 🏢 Description: SpaceXAI'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. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. 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. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates. ABOUT THE ROLE: You will work on the most critical product or technical challenge at any given time. You will get clarity on your first project before an offer. BASIC QUALIFICATIONS: You believe truth-seeking AI is the most important and challenging problem. You take pride in your work and thrive in meritocratic environments. You are an exceptional software engineer. COMPENSATION AND BENEFITS: $180,000 - $440,000 USD Base salary is just one part of our total rewards package, 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. Equal opportunity employer. For details on data processing, view the Recruitment Privacy Notice.

🏢 Summary: Media engineering role focused on building and optimizing large-scale video services integrated with advanced AI infrastructure for a platform serving hundreds of millions of users. The position involves rebuilding media processing and distribution pipelines using high-performance languages and improving video quality, streaming, and real-time communication systems at scale. Candidates should have strong distributed systems experience and deep expertise in modern media technologies. 🗂️ Requirements: 5+ years of experience, Proficiency in C++ or Go, Knowledge of WebRTC, LL-HLS, or video transcoding pipelines, Experience with scalable distributed systems, Strong media quality and performance optimization skills, Strong communication skills 📃 Skills: Go, C++, Rust, Java, Scala, Kubernetes, FoundationDB, ValKey, Envoy, S3, WebRTC, LL-HLS, H.264, H.265, AV1, MP4, CMAF, VMAF, RTP, RTMP, HDR, DRM 🏢 Description: SpaceXAI'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. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. 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. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates. ABOUT THE ROLE: We're looking for exceptional media engineers who want to join us on a new project to deeply integrate xAI's advanced AI infrastructure into a platform used by around 600 million users every month. We're bringing xAI's technology stack and using it to transform the video product experience - video playback, live streaming, Spaces, audio/video calls, and more. This is your chance to contribute in a major way while leveraging all of the powerful AI tools and talented colleagues at xAI. RESPONSIBILITIES: - Build the next generation of large-scale video services - Contribute to and rebuild core media processing and distribution pipelines in high-performance languages (Rust, C++ or Go) - Obsess over every millisecond and pixel, ensuring end-to-end media quality and performance at scale across a rich suite of products and user platforms BASIC QUALIFICATIONS: - At least 5 years of experience - Obsessed with media quality, performance, and product experience - Proficient in high performance C++ or Go - In-depth knowledge of either WebRTC or LL-HLS or video transcoding pipelines - Familiar with building and running scalable and resilient distributed systems PREFERRED SKILLS AND EXPERIENCE: - Go, C++, Rust, Java, Scala - Kubernetes, FoundationDB, ValKey, Envoy, S3 - H.264, H.265, AV1, MP4, CMAF, VMAF, RTP, RTMP, LL-HLS, HDR, DRM COMPENSATION AND BENEFITS: - $180,000 - $440,000 USD - Base salary is just one part of the total rewards package, 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. Equal opportunity employer. Recruitment Privacy Notice available.