Karumi Verified
Software Development, Mobile Development, IT Consulting
Product Engineer (Full-Stack)
San Francisco, California, United StatesOnsiteFull Time$100–$150 /hrPosted 2 months agoHidden Gem · YC Startup
Role summary
Join a fast-growing company as a Product Engineer (Full-Stack) to build user-facing features that directly impact customer experience and platform adoption. This role requires end-to-end ownership, bridging technical execution with product thinking. You will design interfaces, build APIs, optimize performance, and deploy to production using technologies like React, Python (FastAPI), PostgreSQL, Redis, and AWS. Experience with LLM integrations and a strong product mindset are key. Visa sponsorship is available.
## The Opportunity
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._
## 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 - you 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
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._
## 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 - you 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