Fullstack Engineer

Krea • San Francisco, CA

2d • Onsite

About The Position

At Krea, we are building next-generation AI creative tools. We're dedicated to making AI intuitive and controllable for creatives - our mission is to build tools that empower human creativity, not replace it. We believe AI is a new medium that allows us to express ourselves through various formats - text, images, video, sound, and even 3D. We're building better, smarter, and more controllable tools to harness this medium. We recently took this a step forward with the launch of Krea 2, our first foundation model, built completely from scratch for aesthetic diversity and stylistic control. We've raised over $83M and are backed by world-class investors such as a16z, Bain Capital, and Abstract. We work full-time and in-person at our waterfront office in San Francisco. We care about creativity: our team includes musicians, designers, visual artists, and engineers.

Requirements

• Solid full-stack JS/TS engineer with frontend focus—component design, UI state, animations, client performance
• Experience with SvelteKit or similar frameworks, real-time UI via WebSockets
• Comfortable designing APIs, database schemas, caching strategies
• Familiar with infra and scale: Kubernetes, Postgres, Redis, observability stacks

Nice To Haves

• Side projects or open‑source contributions in UI/infra are plus
• Prior work on enterprise auth features, GPU workloads, ML or image/video pipelines

Responsibilities

• Build and maintain APIs and UI flows for web + mobile in Svelte/SvelteKit, TypeScript
• Design interactive, responsive front-end experiences—drag-and-drop, real-time canvas polish, smooth and responsive UI animations
• Optimize frontend performance: minimize render latency, profile UI with virtual DOM techniques, deliver seamless WebSocket image streams
• Design and maintain backend services (Node), DB models (Postgres + Redis caching/pooling)
• Kickstart a Public API project to serve Krea AI models to millions of developers
• Diagnose HTTP/3 and WebSocket related issues both on the client side and the server side
• Drive real-time image & video generation pipelines via low-latency APIs
• Improve observability and alerting using OpenTelemetry tools
• Implement enterprise features: Audit Logs, SAML/SSO, SCIM provisioning
• Scale our infra architecture through deep understanding of our AWS EKS GPU clusters or Kubernetes operators

Benefits

• 100% health & 99% dental/vision insurance premiums covered for employees
• health FSA accounts
• long-term disability coverage
• Flexible PTO policy
• 401k with a 4% company-sponsored match
• breakfast, lunch, dinner - you name it, we'll cover it
• Ubers covered to & from the office
• Sponsorship for international visas where we can (e.g., STEM OPT, OPT, H-1B, O-1, E-3)

What This Job Offers

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