Marketplace / fintech-style concept
Structuring a fragmented currency market into a marketplace
An online currency marketplace — the 'Sahibinden.com of foreign exchange' — connecting people with exchange offices through structured offer discovery, comparison and transaction flows.
Backdrop — the actual working file
- Role
- Product Strategy · Product Concept · UX/UI Design
- Client
- Concept project · via DecentraHubs
- Period
- Concept & product definition
- Platforms
- Web · Mobile web
- Tools
- Figma · Next.js prototype
- Status
- Product definition · interface foundations designed
Overview
Foreign exchange for individuals is an offline, fragmented market: prices vary between exchange offices, availability is opaque, and the only discovery tool is walking around. Kambiyom frames this as a marketplace problem — structured offers, comparable rates, verified offices, and a clear path from discovery to transaction.
The positioning shorthand — a 'Sahibinden.com of foreign exchange' — sets the product bar: a two-sided platform where supply (exchange offices) publishes structured offers and demand (individuals) compares and commits.
CONCEPT-STAGE WORK — presented as product definition and structure, not shipped scale. No invented metrics.
Scope
- Market & opportunity framing
- Marketplace mechanics design
- User flows & product logic
- Interface direction
The challenge
Marketplace products die from the cold-start problem and from trust gaps. The product logic had to make a thin market useful — real-time-ish pricing, office profiles that carry credibility, and transaction flows that don't pretend to be a bank.
Regulatory reality shapes the design: the platform brokers discovery and intent, while the regulated exchange happens with the licensed office.
My role
Product strategy and UX/UI ownership of the concept: market framing, marketplace mechanics, flows and interface direction — carried far enough to be testable with real exchange offices. Concept-stage studio work, framed as such.
Product decisions
3 that shaped the productDesign discovery around structured offers, not a chat marketplace.
WhyFree-text listings reproduce the opacity the product exists to remove.
ImpactOffers carry currency pair, rate, amount band and validity — enabling comparison, sorting and alerting instead of negotiation threads.
Make the exchange office the first-class profile, not the individual listing.
WhyTrust in this market attaches to the office — location, licensing, history — more than to any single offer.
ImpactOffice profiles aggregate offers, ratings and logistics; a stale offer degrades the office's standing, aligning incentives toward fresh pricing.
Keep the transaction flow as structured intent, not payment processing.
WhyPretending to settle regulated FX inside the platform adds risk without adding user value at this stage.
ImpactReserve → confirm → meet/complete flows give both sides commitment and traceability while the regulated step stays with the licensed office.
Product logic
The marketplace loop
Supply publishes structured offers; demand discovers by pair, amount and proximity; comparison creates pressure toward honest pricing; completed transactions build office reputation, which feeds discovery ranking. The loop is designed so every completed exchange makes the marketplace more useful.
Interface direction follows the logic: rate-first cards, comparison tables that respect how people actually evaluate money, and office profiles designed like storefronts rather than user accounts.
// Marketplace mechanics remain concept-stage; the interface foundations below are designed and real.
Interface foundations
Trust-first entry: auth, identity, assets
A money product earns or loses trust at the door. The designed foundation covers personal and business registration, Face ID and passcode entry with every failure state, and the first asset view — the surfaces where a currency marketplace must feel like a financial product, not a classifieds app.
Flow design
Every state of coming back
Re-entry is the most repeated flow in a finance app. The board covers the full return path — splash, passcode, biometric fallback, wrong-passcode recovery — designed as one continuous sequence.
▸ scroll — Log-in after logging out — the full return flow
Outcome
verified, qualitative where honest- 01
A complete product definition: marketplace mechanics, roles, flows and interface direction ready for validation with exchange offices.
- 02
A working Next.js prototype of the core discovery experience.
// Presented honestly as concept-stage product work — the value demonstrated is product structuring, not shipped scale.
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