New Feature UX & Prototype by Daria BernabeiNew Feature UX & Prototype by Daria Bernabei
New Feature UX & PrototypeDaria Bernabei
Before engineering starts, your team needs a shared answer to one question: how should this feature actually work?
New features often begin with a promising idea, then get complicated once user needs, business rules, technical constraints, empty states, and edge cases enter the room.
This service turns a defined feature into a clear, testable product experience before it reaches development.
Together, we shape the feature’s purpose and boundaries, map the user journey, design the interface, and document the behaviours your team needs to build it with confidence.

The process

1. Feature discovery We define the feature goal, the people using it, the business need behind it, and the constraints that matter.
2. Requirements and scenarios I work through the main user tasks, decisions, rules, assumptions, success states, and meaningful edge cases.
3. Flows and wireframes We map how the feature fits into the wider product, then establish the structure before moving into visual design.
4. Interface design and prototype I design the agreed screens and states, then connect them into a clickable prototype your team can review.
5. Handoff and acceptance criteria You receive implementation notes and acceptance criteria that clarify how the feature should behave once it reaches engineering.

What you walk away with

Feature scope, requirements, and assumptions
User flows and wireframes
High-fidelity interface designs for the agreed screens and states
A clickable prototype
Acceptance criteria and handoff notes
Scope: 1 defined feature. Screens, responsive layouts, states, and revision rounds are agreed at kickoff.
FAQs

Starting at$3,000
Duration3 weeks
Tags
Product Designer
UI Designer
UX Designer
UX Researcher
saas
Service provided by
Daria Bernabei Arizgoiti, Spain
1
Followers
New Feature UX & PrototypeDaria Bernabei
Starting at$3,000
Duration3 weeks
Tags
Product Designer
UI Designer
UX Designer
UX Researcher
saas
Before engineering starts, your team needs a shared answer to one question: how should this feature actually work?
New features often begin with a promising idea, then get complicated once user needs, business rules, technical constraints, empty states, and edge cases enter the room.
This service turns a defined feature into a clear, testable product experience before it reaches development.
Together, we shape the feature’s purpose and boundaries, map the user journey, design the interface, and document the behaviours your team needs to build it with confidence.

The process

1. Feature discovery We define the feature goal, the people using it, the business need behind it, and the constraints that matter.
2. Requirements and scenarios I work through the main user tasks, decisions, rules, assumptions, success states, and meaningful edge cases.
3. Flows and wireframes We map how the feature fits into the wider product, then establish the structure before moving into visual design.
4. Interface design and prototype I design the agreed screens and states, then connect them into a clickable prototype your team can review.
5. Handoff and acceptance criteria You receive implementation notes and acceptance criteria that clarify how the feature should behave once it reaches engineering.

What you walk away with

Feature scope, requirements, and assumptions
User flows and wireframes
High-fidelity interface designs for the agreed screens and states
A clickable prototype
Acceptance criteria and handoff notes
Scope: 1 defined feature. Screens, responsive layouts, states, and revision rounds are agreed at kickoff.
FAQs

$3,000