Kraftful
Kraftful

Founding Engineer

May 17, 2025
Full-time
$100,000.00/yr - $150,000.00/yr
Remote · United States
Entry level
Back-end Developer

To fuel our hockey-stick growth, we’re looking for a passionate engineer ready to make an impact.

This isn’t just another job - it’s an opportunity to be a founding member of a rocketship poised to redefine the future of product development.

Responsibilities

  • Contribute to the technical vision and product direction as a core team member.
  • Design, develop, test, and support features for our web and backend applications.
  • Work with the latest large language models from OpenAI.
  • Adopt or invent tools to scale our engineering efforts.
  • Review code and provide constructive feedback to other developers.
  • Debug and triage product issues by assessing business impact.
  • Take ownership of projects from concept to production, ensuring high quality and speed.
  • Tackle early-stage startup challenges with a can-do attitude.

Requirements

  • BA/BS degree or equivalent experience.
  • 6+ years of experience building production software in a team environment.
  • Curiosity to become an expert in the rapidly evolving world of LLMs.
  • Strong interpersonal skills, including written and verbal communication.
  • Passion for delighting customers.
  • Adaptability in a fast-changing environment.

Our Tech Stack

  • Various LLMs (OpenAI and Azure)
  • React
  • PostgreSQL + Prisma
  • BullMQ
  • Redis

Kraftful is backed by Y Combinator, Precursor Ventures, F7 Ventures, Leadout Capital, Google, Samsung Next, Lukas Biewald (Founder/CEO Weights & Biases), Manu Sharma (Founder/CEO LabelBox), and other top investors.

Recruiters: we only want to hear from applicants. Emails from recruiters will be marked as spam.