Fullstack Engineer

Krea.ai, Inc

$130K — $160K *
Information Technology
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • Strong full-stack JavaScript/TypeScript engineer with frontend focus
  • Experience with SvelteKit or similar frameworks
  • Comfortable designing APIs and database schemas
  • Familiar with K8s, Postgres, Redis, and observability stacks
  • Open-source contributions or side projects in UI/infra are a plus
  • Bonus: experience with enterprise authentication, GPU workloads, or ML pipelines

Responsibilities

  • Build and maintain APIs and UI flows for web and mobile using Svelte/SvelteKit and TypeScript
  • Design interactive and responsive front-end experiences with smooth animations
  • Optimize frontend performance and minimize render latency
  • Design and maintain backend services utilizing Node, Postgres, and Redis
  • Lead a Public API project to serve Krea AI models to developers
  • Diagnose and resolve issues related to HTTP/3 and WebSockets
  • Implement enterprise features such as Audit Logs and SAML/SSO

Benefits

  • Work alongside a world-class team building AI creative tooling
  • Significant scope and impact on the company
  • 100% health and 99% dental/vision insurance premiums covered for employees
  • Flexible PTO policy
  • 401k with a 4% company-sponsored match
  • Meals covered in the office
  • Uber rides covered to and from the office
  • Openness to sponsoring international visas
Full Job Description
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
  • Observability: Prometheus, OpenTelemetry, Axiom/HyperDX
  • Tools: GitHub, Slack, Notion
What we offer
  • Team: Work alongside a world-class team building the future of AI creative tooling
  • Impact: Significant scope and company-wide impact
  • Competitive compensation: generous salary & equity packages
  • Health & wellness: 100% health & 99% dental/vision insurance premiums covered for employees, health FSA accounts, & long-term disability coverage
  • Time off: Flexible PTO policy
  • Financial planning: 401k with a 4% company-sponsored match
  • Meals in the office: breakfast, lunch, dinner - you name it, we'll cover it
  • Transit: Ubers covered to & from the office
  • Sponsorship: We're open to sponsoring international visas where we can (e.g., STEM OPT, OPT, H-1B, O-1, E-3).
  • And more!

Please note the above benefits & perks are for full-time employees

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