You will get a working startup prototype, positioning brief and investor deck in 5 days
Top Rated
Project details
Most early-stage founders are stuck in the same place. A strong idea, maybe a rough deck, but nothing that actually feels like a product yet. Investors want to see it. Early users need to try it. Co-founders need to believe in it.
Proof Sprint changes that. In 5 working days you get three things: a working prototype (a real, clickable build, not static mockups), a tight positioning brief that captures who it's for and why it matters, and a narrative deck you can send to investors this week.
It's fixed scope, fixed price. We start with a kick-off call where you walk me through the idea. I take it from there, building the brief, prototype, and deck in parallel, then hand everything back on day 5 with a walkthrough and one round of amends included.
I've spent over a decade designing products for companies ranging from early-stage startups to household names. Proof Sprint is what I wish had existed when those founders first came to me, before the big agency budgets, when they just needed something real to show people.
Proof Sprint changes that. In 5 working days you get three things: a working prototype (a real, clickable build, not static mockups), a tight positioning brief that captures who it's for and why it matters, and a narrative deck you can send to investors this week.
It's fixed scope, fixed price. We start with a kick-off call where you walk me through the idea. I take it from there, building the brief, prototype, and deck in parallel, then hand everything back on day 5 with a walkthrough and one round of amends included.
I've spent over a decade designing products for companies ranging from early-stage startups to household names. Proof Sprint is what I wish had existed when those founders first came to me, before the big agency budgets, when they just needed something real to show people.
Main Type
Mobile Apps, Web AppsFile Format
Figma, PDFWhat's included $3,000
These options are included with the project scope.
$3,000
- Delivery Time 5 days
- Number of Revisions 1
- Number of Pages 10
- Source Files
- Commercial Use
- Interactive Mockup
Optional add-ons
You can add these on the next page.
Additional Revision
+$300
Extend Prototype
(+ 2 Days)
+$750Frequently asked questions
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TG
Todd G.
Jun 22, 2026
UI/UX & Product Design - Mobile App Redesign
Excellent communication and understanding from the very start. Delivered work in good time. Accepted feedback and change requests with no friction. Delivered high quality work that met requirements, and went above and beyond to provide results that work for the project and the business needs.
YV
Yuriy V.
Mar 2, 2026
Landing page redesign
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Richard v.
Feb 6, 2026
UX/UI design for web and mobile application
We worked with Stefan and it was one of the best designers we have worked with, period. Finally a designer that communicated well and had their own ideas
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Dave D.
Sep 18, 2025
UX Designer to design web app landing page
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Ben H.
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UI/UX Designer needed for dating app design
About Barry
UI/UX Designer | Apps, SaaS & Conversion-Focused Websites
100%
Job Success
Bedford, United Kingdom - 10:41 pm local time
A big part of my work is helping teams design MVPs: shaping early ideas, simplifying user journeys and creating polished, build-ready Figma designs that developers can confidently build from.
I’ve worked with entrepreneurial founders, in-house product teams and established organisations to design and evolve products that need to scale, convert and remain easy to use over time. My focus is always on clarity first: reducing friction, improving usability and making sure design decisions are grounded in both user needs and commercial reality.
My experience spans product UI/UX, SaaS platforms, dashboards, mobile apps, internal tools, marketing websites and landing pages, with a strong emphasis on practical, build-ready design using Figma and modern workflows.
Highlights
• UI/UX Freelancer of the Year finalist
• Top Rated Plus & Expert-Vetted on Upwork
• 12+ years professional design experience
• 8,000+ hours delivered on Upwork
• Fast, reliable communication
• Senior, calm and practical design support
Core services
• MVP design for startups and new product ideas
• Product UI/UX design for apps, SaaS, dashboards and internal tools
• Conversion-focused website and landing page design
• UX audits and product simplification
• Prototyping, user flows and wireframes
• Design systems and scalable UI
• Figma design for build-ready handoff
• Webflow-ready website design
I enjoy working on projects where things feel a little unclear or messy at first, helping teams simplify, prioritise and move forward with confidence.
Whether you’re designing a new MVP, refining an existing product or improving how a website performs, I aim to be a calm, senior design partner you can rely on.
Steps for completing your project
After purchasing the project, send requirements so Barry can start the project.
Delivery time starts when Barry receives requirements from you.
Barry works on your project following the steps below.
Revisions may occur after the delivery date.
Kick-off cal
We get on a call so you can walk me through the idea, answer any questions I have and agree the core flow we'll be building toward.
Build phase
I work on the positioning brief, prototype and deck in parallel. You won't hear much from me here - that's intentional. I'm heads down building.