Senior Software Engineer

Moonshot AI • New York, NY

12d • Onsite

About The Position

Imagine websites that rebuild themselves on autopilot to sell more, convert better, and grow faster.
At Moonshot AI, we’re making that happen — merging generative AI, large-scale data pipelines, and experimentation into a self-evolving web.
We’re a well-funded, very early-stage startup with a massive vision. Joining now means you’re not just an employee — you’re helping set the technical and cultural DNA of the company. If you’ve ever wanted the autonomy of a founder with the backing of top-tier investors, this is it.
What You’ll Build & Achieve
As 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.

Requirements

• 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.

Nice To Haves

• Startup experience (you thrive in zero-to-one).
• Experience training or deploying ML models in production.

Responsibilities

• 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.

Benefits

• Competitive salary
• 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.
• 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.
• Backed by top investors in NYC, SF, and TLV.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed