*Remote · Long-term · 5+ Years of Experience*

Karton is a data-driven platform for collectible cards, starting with Pokémon.

We're looking for an *experienced Full-Stack Engineer* with a strong portfolio of real, live web applications.

You should be equally skilled at building beautifully designed frontend interfaces and developing complex backend systems.

### What You'll Build

- High-quality, responsive user interfaces and analytics dashboards.

- Backend systems integrating multiple external APIs and data providers.

- Data pipelines, price aggregation, historical statistics, and market analytics.

- Scalable databases, automated data processing, and reliable production infrastructure.

### Requirements

- *5+ years* of professional Full-Stack development experience.

- Excellent React, TypeScript, SQL, and backend development skills.

- Strong UI/UX skills with proven experience building polished interfaces.

- Extensive production experience with API integrations, data processing, and analytics.

- Experience with PostgreSQL, Supabase, or similar technologies.

- Ability to independently build and manage complex applications from start to finish.

- Experience working with Claude Code.

### How to Apply

*A portfolio featuring at least 10 live websites or web applications that you personally designed and developed is mandatory.*

Submit a link to your personal website or online portfolio showcasing your work.

*GitHub links are not accepted as a substitute for a portfolio.*

No CV, cover letter, or additional explanations required. Just your portfolio link.

We'll review portfolios and contact candidates whose design and development quality matches what we're looking for.

You'll work directly with the founders, taking ownership of a long-term product build.