What You'll Build & AchieveAs our Senior Fullstack Engineer, you'll be
hands-on across the stack - designing, building, and scaling systems that power our AI-driven platform. Expect autonomy, speed, and a ton of ownership.
- Architect and build scalable systems - from backend APIs to frontend dashboards - that process tens of millions of web events per day.
- Design large-scale data infrastructure that explains how websites are built, why they perform the way they do, and how to optimize them.
- Train and integrate LLMs into production to automatically hypothesize, generate, and validate website variants.
- Shape engineering culture & practices - your fingerprints will be all over our tech stack, architecture, and team processes.
- Experiment, prototype, and iterate - research + product + AI + scale, all at once.
This isn't about maintaining yet another SaaS app - it's about
building an AI engine that redefines how digital products are created.Who We're Looking For- A software craftsman - you write clean, scalable code and know how to ship at speed.
- 5+ years fullstack experience (Python, JS, AWS preferred, but not a blocker).
- Experience leading teams or driving major projects.
- Background in CS, EE, Math, or equivalent hands-on mastery.
- An AI enthusiast who wants to build with LLMs and shape how they're applied in the real world.
Bonus Points:- Startup experience (you thrive in zero-to-one).
- Experience training or deploying ML models in production.
What We Offer- Competitive compensation
- Meaningful equity - real ownership in Moonshot AI's success.
- Full health coverage (medical, dental, vision) for you + your family.
- Unlimited PTO - we trust you to take the time you need.
- Tax free commuter and parking benefits
- Office-first culture (4 days/week) - Midtown Manhattan, in the middle of it all.
- Work directly with the founding team - your impact is immediate, visible, and career-defining.
- Free One Medical Membership
- 401k
