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Fullstack Engineer

San Francisco, CAFullstack EngineeringOnsite
Summary

Build and maintain full-stack web/mobile applications with SvelteKit/TypeScript frontend and Node.js backend, focusing on real-time UI, APIs, and performance optimization for AI creative tools. Design responsive experiences and scale infrastructure with Kubernetes and AWS GPU clusters.

About the role

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 our infra architecture through deep understanding of our AWS EKS GPU clusters or Kubernetes operators.

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.
  • 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.
Skills
SvelteKitTypeScriptNode.jsPostgreSQLRedisWebSocketsKubernetesAWS EKSHTTP/3OpenTelemetry