Backend Engineer

About the role

We are building Cardboard, a browser‑based video editor powered by a cloud media pipeline and AI agents. As a Backend Engineer you will own end‑to‑end features, from the user’s click to the service that renders it, delivering fast, reliable media processing.

Key responsibilities

• Own backend systems for exports, proxies, media preprocessing, analysis, and agent‑powered editing.
• Maintain APIs and state contracts between the browser, workers, storage, and database.
• Improve long‑running media workflows such as uploads, exports, processing jobs, progress tracking, and recovery.
• Keep the backend simple and scalable as projects, files, and usage grow.

Required profile

• Experience owning production backend systems and keeping them healthy as the product evolves.
• Clear thinking about state, queues, workers, files, and the contracts between them.
• Ability to turn product goals like faster exports into practical backend plans.
• Passion for media formats, codecs, processing time, and final quality.

Required skills

• TypeScript
• Go
• Rust
• Python
• FFmpeg or GStreamer (bonus)
• Knowledge of codecs such as ProRes, H.264/H.265, BRAW, R3D, DNx

What we offer

• Competitive salary and founding‑team equity.
• Unlimited tokens across every AI model.
• Budget for AI tools and peripherals to support your best work.