At a Glance
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.
We are seeking a skilled and innovative Application Security Engineer to join our technology-driven company. In this role, you will be responsible for ensuring the security and integrity of our cloud-native applications and systems throughout the software development lifecycle, with a particular focus on code security, CI/CD pipelines, and emerging AI technologies.
$100,000 - $258,000 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.
Source: xAI careers · View original posting
Compiled from public job postings, careers pages, and company materials. Data may not reflect current state — verify during interviews.
Security Philosophy
Security Team
Section 2 — People and structure. Org model — Public postings indicate a cross-functional AppSec function working directly with engineering teams across the software development lifecycle; whether the team is centralized or embedded is not publicly available [1][2]. Identified leader — Louis B.; LinkedIn title history lists "Head of Security Engineering" at xAI and "Member of Technical Staff, Security" (LinkedIn profile, accessed) [4]. LinkedIn URL: https://www.linkedin.com/in/louis-b-999a4711 Team size estimate — At least one dedicated Application Security Engineer opening was publicly listed; a reliable headcount cannot be established from the available results. Search query used: "xAI AppSec security engineering LinkedIn"; result range: 1-10 relevant results. Active AppSec job postings — One xAI Application Security Engineer posting was found on the xAI careers page; a separate LinkedIn posting was marked no longer accepting applications [5][3]. Common skill and tool patterns — Secure coding and OWASP Top 10; Python or Rust; code review and static analysis; CI/CD and DevSecOps; threat modeling; vulnerability tracking and remediation; SBOM and software-supply-chain security; Burp Suite; OWASP ZAP; and OWASP LLM Top 10 [2][3]. Additional AppSec-related role — A Security Engineer, AppSec role for Tapestry described code-to-cloud security automation covering GitHub and CI/CD pipelines, but it is associated with X, The Moonshot Factory rather than clearly with xAI [1]
Key Initiatives
Section 3 — Programs and workflows. Security Champions program Not found — No public Security Champions program, roster, or operating details identified. Shift-left in CI/CD CI/CD integration found — The role description calls for integrating security practices throughout the CI/CD pipeline and implementing DevSecOps practices [2]. Vulnerability management Intake sources — Public postings mention code review, static analysis, threat modeling, risk assessments, and security testing tools, but do not define formal intake channels [2][3]. Ticket ownership — Public postings state that the AppSec engineer manages vulnerability tracking and remediation efforts and guides development teams, but do not identify a ticketing system or formal ownership model [2]. Secure SDLC ceremonies Threat modeling and architectural review are publicly specified responsibilities; recurring ceremony names, approval checkpoints, and exception processes are not publicly available [2][1]. New programs or tool rollouts in the last 6 months The available public material identifies ongoing priorities around AI security, OWASP LLM Top 10, SBOMs, CI/CD, and cloud-native application security, but does not document a dated rollout
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