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Software Engineer, Core Services
San Francisco, CA. Posted 4 days ago
The role
You will own critical shared services including auth, webhooks, and backend systems that power agent workflows. You will build systems that sit between product surfaces and the infrastructure layer.
What you will do
- Own authentication by designing and implementing a scalable auth architecture
- Power the agent backend by owning infrastructure behind agent workflows
- Build a robust webhook server for high-throughput event delivery
- Harden SCM integrations by building resilient abstractions over source control providers
- Drive end-to-end agent reliability by partnering with client and inference teams
Required qualifications
- Experience building and operating backend services in production
- Experience working with APIs and third-party integrations
Nice to have
- Experience with auth systems, API gateways, or webhook infrastructure
- Experience working on agentic products or infrastructure and strong opinions on reliability and performance of complex multi-step systems
- Care deeply about clean abstractions, well-defined service contracts, and making it easy for other engineers to build on top of your work
- Strong software engineering fundamentals and enjoying owning the full lifecycle of production services
- Experience with authentication/authorization frameworks (OAuth, JWTs, RBAC), event-driven architectures, or building developer-facing platform services
Benefits
- Equity
- Comprehensive medical, vision, and dental coverage
- Access to a 401(k) retirement plan
- Short & long-term disability insurance
- Life insurance
- Various other discounts and perks
Before you apply
- If there appears to be a fit, we'll reach out to schedule 2-3 short technicals
- After, we'll schedule an onsite in our office, where you'll work on a small project, discuss ideas, and meet the team
About the company
SpaceXSI is building Super Intelligence to help humanity understand the universe. They are building the full Super Intelligence stack, from Colossus supercomputers to Grok models and applications.