Design Engineer

Design the steering surfaces that keep humans in flow while humans and agents move together.

Every role at Polymodal is dual: founding platform builder first, with a design engineering and the human-agent interface (3D & UI) edge that shapes the platform.

As agents take on more execution, people need interfaces that make work visible, steerable, and enjoyable. You'll design surfaces that keep humans in flow while the combined workforce moves.Stack: Svelte / modern JS frontends, multi-modal pipelines, 3D engines, real-time visualization, design systems, data-dense surfaces, and multiplayer-aware agent interfaces.

What you'll own

• Push from dashboards to steering surfaces: make agent behavior visible, tactile, and calm.
• Design the steering layer: intent, visibility, confirmation, and delight across many agents.
• Build visualizations for traditional and novel signals.
• Establish the component library, patterns, and design tokens from scratch.
• Translate agent behavior and AI capability into intuitive interfaces.
• Extend beyond flat dashboards into spatial, 3D, and hardware-adjacent surfaces when they make work clearer.

About you

• You move from taste and prototype to production UI without losing clarity.
• You care about interfaces that make complex systems feel legible, steerable, and calm.
• You have strong taste for attention, motion, hierarchy, and interaction.
• Your intuition translates across software, spatial interaction, and hardware-adjacent surfaces.

Must-haves

• You use AI as part of your own design and engineering loop, not as a side tool.
• You build polished, high-performance interfaces in Svelte, modern JS, or TypeScript.
• Experience with charting/data-visualization libraries (D3, Recharts).
• Built or owned a design system or component library.

Nice-to-haves

• A portfolio of data-dense or real-time interfaces.
• Notable GitHub work or hard side projects.

About Polymodal

Polymodal is a funded pre-seed company building the operating layer for agent-executed organizations. We closed our pre-seed in May 2026, backed by Lunar Ventures, Wind Capital, Volve Capital, and early-stage angels. We are early enough for every hire to shape the company, and real enough that the work must survive customers, scale, security, and trust.

Co-founders & team

You'll build directly with Joep (3x founder, cybersecurity), Sean (former CISO at Slack/Reddit/Bumble), Edo (2x founder in AR/XR and multi-agent systems), and Atul (founder, cybersecurity). We are future-facing, execution-focused, daring, and human.

Our offer

• Competitive salary and meaningful early equity, so you share real ownership.
• A chance to define a new category while product, architecture, and company are still malleable.