Fullstack Engineer

KREA LLC
San Francisco, United States of America
yesterday

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English, Polish

Job location

San Francisco, United States of America

Tech stack

HTML
JavaScript
Computer Animation
API
Artificial Intelligence
Amazon Web Services (AWS)
Audit Trail
Computer Clusters
Databases
Database Design
Database Schema
Document Object Model (DOM)
Github
Design of User Interfaces
Human-Computer Interaction
Transport Layer
PostgreSQL
Node.js
Open Source Technology
Performance Tuning
Redis
Svelte
Prometheus
Security Assertion Markup Language (SAML)
Single Sign-On
TypeScript
WebSocket
Graphics Processing Unit (GPU)
Caching
Backend
Kubernetes
Slack
Low Latency
Free and Open-Source Software
Front End Software Development
Amazon Web Services (AWS)

Job description

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

Requirements

Amazon Web Services (AWS), Animation, Application Programming Interface (API), Artificial Intelligence (AI), Caching, Canvas, DOM (Document Object Model), Database Design, Database Technology, GPU (Graphics Processing Unit), GitHub, HTTP (HyperText Transport Protocol), Identify Issues, JavaScript, Open Source, Performance Tuning/Optimization, PostgreSQL, Redis, Security Assertion Markup Language (SAML), Single Sign-On (SSO), Slack, User Interface Design, User Interface/Experience (UI/UX)

About the company

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.

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