Software Engineer

• You’ll work on systems that operate at massive scale, directly affect the business, and are being rebuilt with modern infrastructure and AI at the center
• This is an opportunity to join a small, fast-moving team where early-career engineers can take on real ownership, learn from strong engineers, and ship products that matter
• We’re looking for high-slope software engineers who want to help rebuild and transform the X Ads Platform using xAI’s infrastructure and AI stack
• This role is a great fit for engineers who are early in their careers but learn quickly, ship fast, and want to work on products and systems that operate at massive scale
• You do not need to have deep ads experience already, but you should be excited to learn how large-scale advertising systems work and how AI can make ads more relevant, useful, and effective
• You’ll work across product, backend systems, infrastructure, and AI-powered features that directly impact the majority of X’s revenue
• Build and ship product features across the X Ads Platform
• Work on systems related to ad delivery, targeting, optimization, measurement, and advertiser experience
• Use xAI’s infrastructure and AI capabilities to improve the performance and quality of advertising products
• Contribute to distributed systems that need to be reliable, fast, and scalable
• Collaborate closely with engineers, product leads, and cross-functional partners to turn ideas into working products
• Learn quickly, take ownership, and operate in a fast-moving environment where high-quality execution matters
• Debug, maintain, and improve production systems that serve real users and drive significant business impact
• You do not need to know every technology listed below. We care more about strong fundamentals, learning speed, and ability to ship; React, Golang, Python, Rust, gRPC and Java / Scala

Benefits

• Health and wellness: Comprehensive health insurance including medical, dental, vision, and disability coverage
• Life and family: Life and AD&D insurance and fertility benefits to ensure our team’s well-being and peace of mind
• Flexible vacation: We work hard but avoid burn out. Take time off when you need it
• Visa sponsorship: We support international talent with visa sponsorship to join our team
• 401(k) plan: Retirement savings plan to secure your financial future
• Excitement about building high-quality product experiences for advertisers and users
• Experience building software through internships, projects, research, open-source work, startups, or full-time roles
• Strong software engineering fundamentals
• A bias toward action: you like shipping, learning from real users, and improving quickly
• Ability to write clean, maintainable code and learn new codebases quickly
• Strong ownership mindset and willingness to take responsibility for meaningful parts of the product
• Strong problem-solving skills and comfort working through ambiguity
• Interest in backend systems, distributed systems, data pipelines, product engineering, or AI applications
• Prior startup, research, internship, or high-impact project experience
• Experience with machine learning, LLMs, experimentation, ranking, or optimization systems
• Experience with React, Golang, Python, Rust, gRPC, Java, or Scala
• Experience working with large-scale backend systems or data processing pipelines
• Experience with ads, recommendations, search, ranking, marketplaces, payments, analytics, or growth systems