Fullstack Engineer
About the role
Cardboard is building a browser-based video editor with a cloud media pipeline and AI agent. We’re hiring a Fullstack Engineer to own features end-to-end across the stack, tackling hard browser and media processing challenges and shaping the AI editing experience.
Responsibilities
- Build and ship features across the whole stack, from the editor a user touches to the services behind it.
- Work on genuinely hard browser problems: real-time editing, smooth playback, and working with large media on the client.
- Help shape the AI editing experience that lets the agent make real edits.
- Keep the product fast and reliable, even on big, demanding projects.
- Solve these hard problems.
Qualifications
- Strong engineering fundamentals and real experience owning features end to end.
- Ability to move across the stack: frontend, backend, and infrastructure.
- Obsessed with quality and performance; fixes for jank.
- Comfort with fast-moving, lightly-processed environments; self-driven maturity.
- Bonus: experience with media or video processing, real-time or offline-first systems, or building on top of LLMs.
Skills
Benefits
- Competitive salary and founding-team equity.
- Unlimited tokens across every AI model. Use whatever you want, as much as you want.
- A healthy budget for AI tools and peripherals.
About Cardboard
Agentic video editor
Cardboard is an agentic video editor for growth/marketing teams and serious creators who need to ship videos consistently. Instead of agencies, long timelines, and infinite review cycles, teams give cardboard a footage + a goal (“3 variants”, “30s hook”, “testimonials”) to get a strong first cut in minutes on which they can iterate quickly. Multimodal LLMs can finally reason over footage, and WebGPU/WebCodecs make a real NLE possible in the browser. For the first time, an “AI director” inside a professional editor can be a reality. We have to build two hard things at once: a high-performance editor in the browser and an agentic editor that is reliable for production use cases. Most startups do one; incumbents can’t rebuild their stack without breaking everything. Saksham and Ishan met in school and have known each other since 15 years. Saksham was Co-founder/CTO of Iterate AI (backed by EF) and posts content on social media; Ishan has spent ~5yr building memory-heavy, performance-critical browser apps at HackerRank (S11) and deeply understands browsers. He has built Hotspoter (5M+ downloads) when he was 14. Together, we’re unusually suited to build the editor core others avoid. Video is becoming the default distribution channel, and the team that iterates fastest compounds attention. Cardboard becomes the default workspace for video production, the way Canva/Figma became the workspace for design - because it’s collaborative, fast, and does the tedious parts for you.
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