Software Engineer, X Money
- Salary
- $180,000 - $440,000
- Level
- Mid
Not stated in the posting: work type, visa.
Open. First seen 2 October 2026.
About the role
SpaceXSI's standard text
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.
ABOUT THE ROLE:
We are seeking a talented Software Engineer to join our X Money team, focused on building a revolutionary global payment network that will serve over 600 million users and rival the world’s largest financial institutions. In this role, you will specialize in backend development, designing and optimizing robust microservices to ensure scalability, security, and reliability. You will support full-stack efforts, collaborate with cross-functional teams on payments, fraud detection, and compliance initiatives, and contribute to the creation of a high-scale financial products platform.
This is an opportunity to work on greenfield projects in a fast-paced, startup-like environment, driving innovation at the intersection of AI and finance.
RESPONSIBILITIES:
- Develop backend services, APIs, and data models to support high-volume, multi-user environments.
- Work with iOS, Android & Web client engineers to ship products.
- Design robust infrastructure and microservices for payments, transactions, growth, monetization, and engagement across platforms.
- Build and maintain fullstack features, including user dashboards, personalized experiences, content delivery, interactive tools, assessments, and real-time analytics.
- Lead architecture, scalability, and reliability decisions for high-concurrency, low-latency systems.
- Uphold engineering excellence via testing, monitoring, deployment, and secure data handling.
BASIC QUALIFICATIONS:
- Proficiency in distributed systems for high-scale, low-latency environments; languages like Rust, Go, Python & Java, and high volume streaming systems.
- 2+ years of experience working on large scale consumer applications.
PREFERRED SKILLS AND EXPERIENCE:
- 5+ years of experience working on large scale consumer applications or early-mid stage startup experience as a founding engineer, emphasizing rapid prototyping, user-centric design, and AI solutions.
COMPENSATION AND BENEFITS:
$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's standard text
SpaceXSI is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.
What this role asks for
Standard for software engineering roles
Python
Common in software engineering postings at any company.
68% of this description is written for the role. The rest is SpaceXSI's standard text, folded away below.
Read against SpaceXSI's other open postings on this site.
The team: Product
This role is one of 13 open in Product.
WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS
Rust (13 of 13), Python (6 of 13), Golang (5 of 13), Kubernetes (5 of 13), Android (4 of 13), iOS (4 of 13), Scala (4 of 13)
OTHER ROLES ON THIS TEAM
- Web Engineer, X posted Mar 19
- Member of Technical Staff - Voice Product posted Mar 17
- Member of Technical Staff - Imagine Product posted Mar 6
- Member of Technical Staff - Grok Product posted Mar 5
- Mobile iOS Engineer posted Feb 19
- Mobile Android Engineer posted Feb 19
- Backend Engineer - Enterprise posted Dec 17
- Mobile iOS Engineer posted Nov 18
- Mobile Android Engineer posted Sep 15
- Software Engineer, Media posted Jul 30
- Software Engineer, Observability posted Jul 29
- Software Engineer, Data Platform posted Jul 29
From the team and dates on SpaceXSI's own job board.
See Software Engineer salaries in the United States →
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