Fullstack Engineer

About the role

ABOUT KREA

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 https://www.krea.ai/blog/krea-2-image-model, our first foundation model, built completely from scratch for aesthetic diversity and stylistic control, and with Krea 3 https://www.krea.ai/blog/introducing-krea-3 - our new image editing model.

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.

Some examples of things you will do:

- 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

- Bonus: Scale our infra architecture through deep understanding of our AWS EKS GPU clusters or Kubernetes operators

Strong candidates may have experience with the following:

- 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

- Side projects or open‑source contributions in UI/infra are plus

- Bonus: prior work on enterprise auth features, GPU workloads, ML or image/video pipelines

Stack:

- Frontend: Svelte/SvelteKit

- Backend: Node + TypeScript, Postgres, Redis

- Realtime: WebSockets, HTTP/3

- Infra: AWS EKS GPU clusters, Kubernetes