Ads Platform Engineer, AI-Powered & Scalable

SpaceXSI; Palo Alto (CA); On-site; USD 150,000 - 350,000; Full time

Benefits offered by this job

Equity

Medical coverage

Dental coverage

401(k) retirement plan

Disability insurance

Life insurance

Employee discounts and perks

Job summary

SpaceXSI seeks early-career software engineers to join a small, fast-moving team rebuilding the X Ads Platform using SpaceXSI's AI stack. You will own features across ad delivery, targeting, and advertiser experiences, shipping reliable systems at scale with strong ownership and fast iteration.

You’ll work with product, backend, and AI teams to transform ideas into working products while learning rapidly in a high-impact environment that directly affects X’s revenue.

Qualifications

• Strong software engineering fundamentals.
• Ability to write clean, maintainable code and learn new codebases quickly.
• Strong problem-solving skills and comfort working through ambiguity.
• Experience building software through internships, projects, research, open-source work, startups, or full-time roles.
• Interest in backend systems, distributed systems, data pipelines, product engineering, or AI applications.
• A bias toward action: you like shipping, learning from real users, and improving quickly.
• Strong ownership mindset and willingness to take responsibility for meaningful parts of the product.

Responsibilities

• Build and ship product features across the X Ads Platform.
• Work on systems related to ad delivery, targeting, optimization, measurement, and advertiser experience.
• Use SpaceXSI'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.

Skills

Backend systems

Distributed systems

Data pipelines

AI applications

Project experience

Tools

React

Golang

Python

Rust

gRPC

Java

Scala

Job description

SpaceXSI seeks early-career software engineers to join a small, fast-moving team rebuilding the X Ads Platform using SpaceXSI's AI stack. You will own features across ad delivery, targeting, and advertiser experiences, shipping reliable systems at scale with strong ownership and fast iteration.

You’ll work with product, backend, and AI teams to transform ideas into working products while learning rapidly in a high-impact environment that directly affects X’s revenue.