Fullstack Engineer

Krea.ai, Inc

$120K — $160K *
Consumer Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • 5-7 years of experience as a full-stack engineer with a focus on front-end development
  • Proficiency in Svelte/SvelteKit for building web applications
  • Strong understanding of TypeScript and Node.js for backend services
  • Experience with database design and caching strategies, particularly Postgres and Redis
  • Familiarity with real-time UI implementation using WebSockets and HTTP/3
  • Knowledge of container orchestration with Kubernetes and AWS EKS
  • Background in enterprise features like SAML/SSO and observability tools

Responsibilities

  • Develop and maintain APIs and user interfaces for web and mobile applications
  • Create interactive and responsive front-end experiences with smooth animations
  • Enhance frontend performance by minimizing render latency and profiling UI
  • Design backend services and database models, ensuring effective caching
  • Launch a Public API project for Krea AI models to enhance developer access
  • Troubleshoot HTTP/3 and WebSocket issues on both client and server sides
  • Drive low-latency APIs for real-time media generation pipelines

Benefits

  • Collaborative work environment focused on creativity and innovation
  • Opportunity to influence the direction of product development in AI
  • Flexible working arrangements to support work-life balance
  • Access to cutting-edge technology and resources
  • Potential for personal growth through involvement in diverse projects
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

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