The gap between a polished Figma file and the app a user actually installs is where good products quietly become average ones. Spacing drifts by a few pixels, an animation gets dropped “for now,” a font weight is approximated. None of it is catastrophic on its own. Together, it’s the difference between an app that feels crafted and one that feels assembled.

Design and engineering share one vocabulary

Our handoff works because designers and engineers agree on a shared language before a screen is drawn. Tokens — not screenshots — are the source of truth. A colour is never #1F2E5B in a design and a magic number in code; it’s navy in both.

  • Spacing scale. A fixed set of spacing steps that both tools reference, so “a bit more padding” has a precise meaning.
  • Type ramp. Named text styles that map one-to-one to widgets in code.
  • Motion tokens. Durations and easing curves defined once and reused, so transitions feel consistent across the app.

If a value exists in the design but not as a token, it will drift in code. Tokens are how intent survives the handoff.

Component parity, screen by screen

We build a Flutter widget for every component in the design system before assembling screens — buttons, fields, cards, chips. Screens then become compositions of trusted parts rather than bespoke one-offs. When the design system changes, every screen updates with it.

How we check

We overlay the running app against the Figma frame at 100% and look for any difference. If something is off by even a few pixels, it’s a bug — not a rounding error to wave through.

Don’t skip the in-between states

Designs tend to show the happy path. Real apps live in the in-between: loading, empty, error, offline, the very long name that breaks the layout. We design and build these states deliberately, because they’re where users spend their most frustrating moments.

The takeaway

A faithful handoff isn’t about heroics at the end — it’s about a shared system at the start. Tokens, component parity and honest attention to edge states are what let a Flutter build feel exactly as considered as the Figma file it came from.