What a Development-Ready Design Handoff Includes
A design handoff is more than a Figma link. What your developers need from design, how to check a package before work starts, and what to ask your designer for.
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A development-ready handoff gives developers everything they need to build the app without guessing: the flows, every screen in every state, reusable components, content rules, and notes on behaviour. A Figma link with finished screens is not a handoff. If a developer has to ask "what happens when this fails?", the handoff is missing a piece.
The cost of a thin handoff shows up later, as questions, assumptions and rework. A good package answers most questions before they are asked, and shows which ones are still open.
What should be in the package?
1. The flows
The path through the product from trigger to finish, including where it branches. Developers should see how screens connect, not only how each one looks. On Alva, an AI scanner app, we mapped every core screen and flow before visual design: scan or search a product, land on the risk-score card, drill into the ingredient breakdown, build a history, and add a product manually when there is no barcode or photo match.
2. Every state, not only the happy one
For each screen: loading, empty, error, success, no connection, permission denied, and anything else that can happen to it. If a state is missing in the design, a developer will invent it. We cover this in empty, loading and error states.
3. Components and a small design system
Buttons, inputs, navigation, cards, feedback messages, each with its states, built once and reused. Colours, type and spacing as named values rather than numbers pasted onto layers. This lets developers build a component once and trust it everywhere.
4. Content rules
Real text, not lorem ipsum: labels, error messages, empty-state copy, and rules for length and tone. Note where content comes from the system, and what happens when it is longer than the design expects.
5. Behaviour notes
What happens on tap, swipe and long press. Which transitions exist. How lists load more. What is saved and when. These do not show in a static screen, so write them next to it.
6. Responsive and device scope
Which screen sizes and orientations are in scope, and how layouts adapt between them. State what is out of scope too.
7. Acceptance criteria for the important steps
"When a submission fails, keep the entered information, explain what went wrong, and offer a retry" is something a developer can build and a tester can check. "Show a friendly error" is not.
8. Assets and specs, ready to export
Icons, images and illustrations in the formats the platform needs, named and organised. For Tenzio, we delivered developer-ready Figma specs that fit the client's existing stack, so the work could be implemented without the engineering side having to translate it.
How do you review a handoff before development starts?
Pick one important journey and trace it end to end in the files.
At each step, ask what happens if it fails. Check it is shown.
Look for numbers on layers that should be named styles.
Count how many different button, card and input styles exist.
Ask a developer to read the files and write down their questions. Treat each as a gap.
Who should be in the conversation?
Developers, ideally before design is finished. They can flag what is expensive, what the platform already provides, and what will not work with your data. Review the key flows with them, record what changes, and keep decisions in one place. Where design and the technical approach differ, document the compromise instead of leaving two conflicting versions.
What to do this week
Choose the flow you will build first.
Check it against the eight items above.
List what is missing and who will provide it.
Ask your developer which three things in the files slow them down.
FAQ
Is a Figma file a handoff?
It is the main part. A handoff also needs states, behaviour notes, content rules and agreed scope, and someone available to answer questions.
Do designers have to know how to code?
No. They need to understand what developers need and what the platform does, and to talk with developers early.
Does a design handoff end the designer's involvement?
Not necessarily. Questions come up during the build. Agree beforehand how they will be answered and by whom.
Related reading: when your app needs a design system and design partner vs freelancer vs in-house designer.
If you are preparing for development and want a second opinion on the design package, see our mobile app design service, or book a free 30-minute Product Diagnosis. To decide what must be settled before the build starts, read why development is an expensive place to figure out your product.
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