Sr. Software Engineer, X Money
- Salary
- $180,000 - $330,000
- Level
- Senior
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.
SR. SOFTWARE ENGINEER, X MONEY
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:
- 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
PREFERRED SKILLS AND EXPERIENCE:
- Experience with high-volume streaming systems
- Experience with distributed systems for high-scale, low-latency environments
- Experience with Rust, Go, Python, or Java
COMPENSATION AND BENEFITS:
$180,000 - $330,000 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.
67% of this description is written for the role. The rest is SpaceXSI's standard text, folded away below.
Compared with SpaceXSI's other open jobs.
The team: Product HIRES STEADILY
This role is one of 13 open in Product. 2 were posted in the last 30 days and the oldest in July: a team that hires all year rather than one being built.
WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS
Rust (8 of 13), Android (6 of 13), iOS (6 of 13), Golang (5 of 13), Kubernetes (5 of 13), Python (5 of 13), Scala (4 of 13)
OTHER ROLES ON THIS TEAM
- Sr. Mobile iOS Engineer posted Nov 6
- Sr. Mobile Android Engineer posted Nov 6
- Sr. Web Engineer (X) posted Mar 19
- Software Engineer, Voice Product posted Mar 17
- Software Engineer, Imagine Product posted Mar 6
- Software Engineer, Grok Product posted Mar 5
- Sr. Backend Engineer, Enterprise posted Dec 17
- Mobile iOS Engineer posted Nov 18
- Mobile Android Engineer posted Sep 15
- Sr. Software Engineer, Media posted Jul 30
- Sr. Software Engineer, Observability posted Jul 29
- Sr. Software Engineer, Data Platform posted Jul 29
From the team and dates on SpaceXSI's own job board.
See Software Engineer salaries in New York →
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