Product Engineer; Full-Stack

Join to apply for the Product Engineer (Full‑Stack) role at Karumi (YC F25)

$100.00/yr - $170.00/yr

Join our product engineering team in the US to build features that directly impact how customers experience and adopt our platform. This role bridges technical execution and product thinking — you'll ship user‑facing features while making architectural decisions across the entire stack. You’ll work end‑to‑end: designing interfaces, building APIs, optimizing performance, and deploying to production. We move fast, iterate with users, and expect engineers to own problems from concept to launch.

We sponsor visas for qualified candidates.

• Build full‑stack features from UI components to backend services
• Design and implement responsive, intuitive user interfaces with React
• Develop high‑performance APIs using FastAPI and async Python
• Work with LLM integrations, prompt engineering, and AI‑powered workflows
• Deploy and monitor features across our AWS infrastructure
• Gather user feedback and iterate rapidly on what you ship

• Strong full‑stack development experience (frontend + backend)
• Proficient in React and modern JavaScript/Type Script
• Python skills with FastAPI or similar frameworks
• Experience with Postgre
  
  SQL, Redis, and async patterns
• Comfortable with AWS/Azure/GCP, deployment pipelines, and infrastructure basics
• Product mindset — you care about user experience and customers, not just code

• Experience building with LLMs and AI‑powered features
• Browser automation or headless browser technologies
• Design sensibility and attention to UI/UX details
• Previous startup or 0‑to‑1 product experience

• Meaningful equity stake in a backed, fast‑growing company
• End‑to‑end ownership of features users interact with daily
• Direct impact on product direction and company trajectory
• Small team where shipping matters more than process
• Gym
• Visa sponsorship available

Entry level

Full‑time

Engineering and Information Technology