Senior Product Designer, Video Editing Tools

About the product

We build software that produces finished video using generative models.

A user defines their cast from a handful of reference photos, describes the piece they want, and the product plans it as a storyboard, generates each shot, places the subject against a background, adds captions and music, and delivers a finished cut.

Work that would take an editor and a small crew a full day is designed to take one person an afternoon.

What you'll own

• The editing surface end to end: timeline, preview, transport, selection model, and keyboard map
• The generation-to-edit handoff: how AI-produced shots enter a timeline, and how a user fixes or re-rolls one without losing the rest of the cut
• Interface economics: making cost and time clear without turning the product into a billing screen
• The compositing and keying experience, turning filter parameters into controls users can judge by eye
• Captions and titling, including type, timing, safe areas, vertical and horizontal formats, and non-Latin scripts
• The information architecture of a project (cast, locations, boards, shots, versions, renders), currently managed only through folders
• A design system built for a dense, dark, canvas-first application
• Working prototypes as a primary deliverable, not just specifications

Requirements

• 7+ years designing software products, including 3+ years on a professional creative or media tool that shipped to real users (video, motion, audio, colour, DAW, compositing, or animation tooling)
• Experience shipping a real editing timeline with a selection model, trim behaviour, and snapping, with the ability to explain decisions around ripple, roll, slip, and slide
• Strong fluency in NLE concepts: bins, sequences, in and out points, nesting, proxies, render states, title safe, reframing, and the difference between preview and delivery quality
• Experience designing for both keyboard-first power users and first-time users within a single product
• Ability to build functional prototypes (in code, After Effects, Origami, or similar), in addition to Figma
• Comfort reading the code you design for, including understanding what the rendering pipeline can and cannot do
• A portfolio that shows deep ownership of at least one tool, including the decisions made and the tradeoffs in hindsight

Preferred experience

• Background on CapCut, Final Cut Pro, Premiere, After Effects, DaVinci Resolve, Descript, Runway, Frame.io, Avid, InShot, VN, or a comparable in-house editing tool at scale
• Experience designing masking, rotoscoping, keying, or background-removal interfaces
• Experience designing a subtitle or caption editor, including non-Latin scripts
• Experience with mobile-first vertical video editing
• Experience making generative, render-farm, or cloud-export costs visible to users
• Experience transitioning a tool from engineer-built forms to a fully designed product

This role is not

• a video editing or motion design position
• an AI or ML engineering role
• a generalist product design role covering dashboards or marketing sites
• or a purely visual design role.
• The core challenge is designing behaviour under latency, cost, and non-determinism.

Interview process

• Portfolio deep-dive (60 minutes): a detailed walkthrough of one tool you shipped
• Critique session (45 minutes): reviewing and critiquing our current interface
• Paid design exercise (approximately 3 hours): a brief drawn from our real roadmap
• Working session with the founder on live product decisions

Location: Fulham, London

Contract type: Contract, 2 to 3 months