Fullstack Engineer

krea.ai; San Francisco (CA); On-site; USD 100,000 - 150,000; Full time

Job summary

Krea.ai is seeking a skilled full-stack engineer to build and maintain APIs and UI flows for their next-generation AI creative tools. The role encompasses designing responsive and interactive front-end experiences while optimizing for performance and diagnosing technical issues.

Candidates should have strong knowledge in JS/TS, Svelte/SvelteKit, and backend development with Node and Postgres. Experience with real-time applications and Kubernetes would be a plus, along with a passion for AI technologies.

Qualifications

• Solid full‑stack JS/TS experience with a frontend focus.
• Comfortable designing APIs and database schemas.
• Prior experience with real-time applications and observability stacks.

Responsibilities

• Build and maintain APIs and UI flows for web + mobile.
• Design interactive, responsive front‑end experiences.
• Optimize front‑end performance and diagnose issues.

Skills

Full-stack JS/TS engineering

Component design

UI animations

Real-time UI with WebSockets

API design

Database schemas

Kubernetes

Postgres

Redis caching

Observability tools

Tools

Svelte/SvelteKit

Node

TypeScript

Prometheus

OpenTelemetry

AWS EKS

Job description

About Krea

At Krea, we are building next‑generation AI creative tools. We are 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.

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 front‑end 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.

Preferred experience

• 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
• Observability: Prometheus, OpenTelemetry, Axiom/HyperDX
• Tools: GitHub, Slack, Notion