Interaction design, the micro-moments users feel, consistent across every component.
Interaction design is the part of design where the brand becomes a feeling. Buttons that respond, transitions that explain, gestures that fit the platform. We design the interaction layer alongside the static frames so engineering implements against motion specs, not 'feel free'.
What we build
Gesture grammar per platform
Swipe, tap, long-press, drag, each gesture mapped to a specific affordance, used consistently. Users learn the gestures once and reuse them across the product.
Transition language with named easing tokens
`ease-out-quart`, `ease-out-expo`, duration scales. Engineers don't pick 'snappy'; they pick a named token. The motion across the product feels like one product.
Micro-interactions that earn their place
Button hover, input focus, toggle flip, save confirmation, each designed with intent. Not motion for motion's sake; specific feedback for specific user actions.
State transitions as part of the design
Loading → loaded, empty → populated, error → recovered. The transitions between states are designed, not 'the page rerenders'. The user follows the motion to the new state.
Specified in Figma + prototyped in Rive
Static frames in Figma show before/after; Rive prototypes show the in-between. Engineers implement against motion tokens; designers verify against the Rive spec.
Reduced-motion downgrades, not opt-outs
Every interaction has a reduced-motion variant. Critical feedback (save confirmation, error states) still happens; the motion intensity drops to crossfade. The product still feels alive, just less.
Where this fits
Your product's interactions feel inconsistent because each engineer chose timing values by feel.
Your design system has static components and no spec for what happens between states.
Your team is shipping a mobile app and the gesture language is being invented per screen.
Tech stack
- Figma
- Rive
- ProtoPie
- Easing Tokens
Want this for your team?
30 minutes with a founder or senior engineer. We'll scope what you need and tell you straight whether Stacklane fits.
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