Turning a Rough Fintech Idea into a Build Plan

01 Status

02 Summary

Capital Collective was a PRD and spec handoff project for an AI-powered stock screener.

The challenge was to turn a complex investment analysis workflow into a clear MVP, parameter architecture, and prototype direction for a 3-person engineering team.

I defined the MVP, mapped 69 financial parameters across three tiers, wrote the PRD, and delivered Figma prototypes as a dev handoff. The project was cancelled post-handoff due to an external API issue.

03 Problem

The challenge was to turn a broad stock screener idea into a clear product direction for investment analysis workflows.

That meant structuring the screening logic, defining which financial parameters mattered first, and translating complex analysis needs into an MVP that engineering could work from.

04 My Role

• MVP scoping
  Narrowed a broad stock screener idea into a defined MVP scope.
• 69-parameter architecture
  Mapped 69 financial parameters across descriptive, fundamental, and technical tiers based on investment decision logic.
• PRD / spec writing
  Wrote the full product requirements document for the engineering team.
• Figma prototype
  Designed and delivered Figma prototypes as the dev handoff artifact.
• Stakeholder collaboration
  Worked with the former CTO of HepsiJet throughout the project.

05 Key Decisions

• Parameter architecture
  Organised 69 parameters into three tiers - descriptive, fundamental, and technical - based on how investment decisions are actually made.
• MVP boundary
  Separated must-have functionality from later-phase functionality to give engineering a clear starting scope.
• Buildable handoff
  Created a Figma prototype as the handoff artifact, not just a written spec, so engineering had a visual reference.

06 Visual Artifact

07 What This Proves

• Complex domain logic
  I can turn complex domain logic into product structure and parameter architecture.
• MVP scoping
  I can define MVP scope from a broad product idea without overbuilding.
• PRD / spec depth
  I can create PRD and spec artifacts that give engineering a clear starting point.
• Stakeholder handoff
  I can deliver a complete handoff even when final build or adoption is not confirmed.