Serge BelovApplication Prototypes
Validate your idea before committing to full development.
What this is
A prototype answers the expensive question before you spend the budget. Whether you need a clickable mockup to pitch investors or a coded proof-of-concept to test with real users, I build prototypes that communicate clearly and move fast.
Who it's for
- Founders preparing to pitch to investors or a board
- Product managers needing to validate a feature before committing dev resources
- Businesses evaluating whether a technical approach is feasible
- Anyone who needs to show, not just tell, what they're building
Problems it solves
- You can't get buy-in without showing something tangible
- You're not sure if the UX will actually work until users try it
- Full development would be wasted if the concept doesn't land
- Developers are estimating wildly because the idea isn't clear yet
What you get
- Clickable prototype: interactive Figma file with all key flows
- Coded prototype: deployed Next.js app with working UI (no fake data)
- Screen-by-screen annotation doc explaining design decisions
- Handoff call to walk through the prototype with your team
How it works
- 1
Brief
You share the idea, the audience, and what questions the prototype needs to answer.
- 2
Flow mapping
I map the core user journey and agree on which screens matter most.
- 3
Build
Fast, focused execution. Clickable prototypes in 3–5 days, coded in 1–2 weeks.
- 4
Feedback
One round of revisions included. We refine until it communicates the idea clearly.
- 5
Handoff
You receive the files and a walkthrough session. If you move to full development, I can continue.
Pricing
From $900
Fixed price for the defined scope. No hourly billing, no surprises.
Optional add-ons
User testing facilitation
I recruit and run a moderated usability test with 3–5 participants and deliver a findings report.
Upgrade to coded prototype
Upgrade from a clickable Figma prototype to a deployed, working coded prototype.
Additional revision round
An extra round of changes beyond the included revision.
Frequently asked questions
What's the difference between clickable and coded?
A clickable prototype is built in Figma — it looks real and is interactive but has no actual code. A coded prototype is a real deployed web app with working UI, though not production-grade. Coded prototypes are better for user testing; clickable are better for pitches.
Can a prototype turn into the real product?
Coded prototypes can serve as a foundation, but I'll be honest about what was built for speed vs. production. Usually a clean rebuild is worthwhile for long-term maintainability.
How fast can you deliver?
Clickable prototypes take 3–5 business days from brief. Coded prototypes take 5–10 business days.
Do I need to know exactly what I want?
No — that's part of why you're getting a prototype. Come with a problem and a rough idea. I'll help shape it.
Ready to get started?
Describe your situation and I'll tell you exactly how I can help — or be straight with you if I'm not the right fit.