Product Engineer (Full-Stack)
Karumi (YC F25) · New York, NY · 4 mo ago
On-siteEngineeringFull-time
Core Responsibilities
- 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
Technical Requirements
- Strong full-stack development experience (frontend + backend)
- Proficient in React and modern JavaScript/TypeScript
- Python skills with FastAPI or similar frameworks
- Experience with PostgreSQL, Redis, and async patterns
- Comfortable with AWS/Azure/GCP, deployment pipelines, and infrastructure basics
Product Mindset
- Care about user experience and customers, not just code
Nice to Have
- 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
Why Karumi
- 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