Erdeniz TunçProduct Manager
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Turning a Rough Fintech Idea into a Build Plan

PRD, 69-parameter architecture and Figma delivered. Cancelled afterwards over an external API.

Product Manager (part-time)  Capital Collective  AI stock screener  3-engineer team  2024

Problem

  • A broad stock-screener idea, with no product direction yet.
  • Investment analysis is complex: which financial parameters matter first?
  • Engineering needed an MVP it could start on.

What I did

  • Narrowed the idea into a defined MVP scope.
  • Mapped 69 financial parameters across three tiers.
  • Wrote the full PRD for the engineering team.
  • Designed and delivered Figma prototypes as the handoff.
  • Worked with the former CTO of HepsiJet throughout.

Three decisions

Three tiers, in decision order.

Descriptive, fundamental, technical, following how investment decisions are actually made.

A clear MVP line.

Must-haves separated from later phases, so engineering had a starting scope.

Hand off a prototype, not only a document.

Engineering got a visual reference as well as the spec.

The screener

Capital Collective stock screener Figma prototype showing filter and screener logic
The Figma prototype: complex financial logic as a usable interface.

Where it ended

The PRD and Figma prototype went to engineering, complete. The project was then cancelled over an external API. Nothing shipped.

Related case“Thirty screens to define, six engineers waiting.”Defining 30+ Screens for a Six-Engineer Team The company shipped it. It later passed 10,000 users, after my engagement ended.
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