Software Engineer - X Developer Platform

SpaceX Super Intelligence; Palo Alto (CA); On-site; USD 180,000 - 440,000; Full time

Job summary

SpaceXSI is building the X Developer Platform to connect X with global B2B and B2C developers. The team ships a reliable API suite enabling real-time posts, search across archives, programmatic content management, and analytics to empower agents and automated systems.

With hundreds of billions of signals processed daily, we focus on high availability, scalability, and developer experience, collaborating with Product, Business, and customers to shape the next evolution of the platform.

Qualifications

• MS or BS in Computer Science.
• 5+ years of experience building commercial software applications or services.
• Distributed Systems experience; Kafka is a plus.
• Experience with RPC frameworks and microservices.
• Strong CS fundamentals: data structures and algorithms.
• Experience with front-end technologies (HTML, CSS, JavaScript).
• Experience with cloud platforms: AWS, Azure, Google Cloud.

Responsibilities

• Collaborate with engineering, product leadership, business leadership, and engineers across the company.
• Maintain and improve the systems that serve our existing customers while designing and shipping new products that expand what the platform can do.
• Design clean, reliable, well-abstracted solutions to problems of scale, correctness, and developer experience.
• Help shape the architecture of the platform as it grows to serve new categories of consumers, including agents and automated systems.

Education

MS or BS in Computer Science

Tools

Kafka

RPC frameworks

Microservices

Front-end (HTML CSS JavaScript)

Cloud platforms (AWS Azure Google Cloud)

Job description

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.

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:

The X Developer Platform team owns the partner ecosystem that connects X with B2B and B2C developers around the world. X reaches more than 500 million active users who produce billions of posts every week, and that activity generates signals and capabilities that go far beyond a conversation to listen to: real-time knowledge of what is happening in the world, rich media, commerce, communities, and the connective tissue between people, businesses, and now agents. Our job is to make that value available to developers as the everything API, so that anyone can build products on top of X.

Our mission is to help achieve the X Everything app and make X the clear digital townsquare of Earth. We do this by making X data and functionality available through a consistent and reliable API suite, so that developers and the emerging world of agents can realize its full potential. Behind the scenes we collect, process, enrich, and deliver hundreds of billions of signals a day. The products we build are highly available, scalable, optimized, respectful of X’s user base, and essential to the customers who depend on them. We work closely with our Product and Business counterparts and directly with customers to shape what we build next.

X Developer API Products Include:

• Real-time delivery of public posts and events, filtered and enriched to match each customer’s use case
• Search and retrieval across the full historical archive of public content on X
• APIs for creating, publishing, and managing content and interactions programmatically
• Engagement, audience, and performance data that powers analytics and measurement products
• Enrichment layers that add context, structure, and relevance signals to raw platform data
• Interfaces designed for programmatic consumers, enabling agents and automated systems to read from and act on the platform safely
• Developer tooling, documentation, and self-serve onboarding that make the platform easy to adopt and integrate

RESPONSIBILITIES:

• Collaborate with engineering, product leadership, business leadership, and engineers across the company.
• Maintain and improve the systems that serve our existing customers while designing and shipping new products that expand what the platform can do.
• Design clean, reliable, well-abstracted solutions to problems of scale, correctness, and developer experience.
• Help shape the architecture of the platform as it grows to serve new categories of consumers, including agents and automated systems.

BASIC QUALIFICATIONS:

• MS or BS in Computer Science
• 5+ years of industry experience working on commercial software application or services
• Distributed Systems experience (Kafka experience is a plus)
• Experience working with RPC frameworks and microservices
• Understanding of core CS concepts, such as, common data structures and algorithms
• Experience with front-end development technologies (e.g., HTML, CSS, JavaScript
• Experience with cloud platforms and services (e.g., AWS, Azure, Google Cloud)

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 is an equal opportunity employer. For details on data processing, view our Recruitment Privacy Notice.