Fullstack Engineer - Real-Time AI UI/Backend

Krea; San Francisco, Northern (CA, KY); Hybrid; USD 180,000 - 260,000; Full time

Benefits offered by this job

Health & dental coverage

401k with company match

Meals in office

Transit covered

Visa sponsorship

Job summary

Krea, based in San Francisco, seeks a strong frontend/full-stack JS/TS engineer to build next‑gen AI creative tooling. You will implement APIs and UI flows using SvelteKit, design responsive, interactive experiences, and optimize performance with real-time WebSocket streams.

The role involves backend work (Node, Postgres, Redis) and driving public API initiatives to serve Krea AI models to millions of developers.

Qualifications

• Solid full-stack JS/TS engineer with frontend focus
• 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

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
• Bonus: Scale infra through AWS EKS GPU clusters or Kubernetes operators

Skills

Frontend JS/TS

SvelteKit

WebSockets

API design

Tools

Node.js

TypeScript

PostgreSQL

Redis

Job description

Krea, based in San Francisco, seeks a strong frontend/full-stack JS/TS engineer to build next‑gen AI creative tooling. You will implement APIs and UI flows using SvelteKit, design responsive, interactive experiences, and optimize performance with real-time WebSocket streams.

The role involves backend work (Node, Postgres, Redis) and driving public API initiatives to serve Krea AI models to millions of developers.