Fintech & Payments

Payment products that banks approve and merchants actually use.

I spent eight years building a payment ecosystem, from a whiteboard sketch to 500,000+ transactions a month. I help fintechs, payment companies and banks define, launch and grow wallets, merchant acquiring and payment links, with the bank, the card network and the regulator planned in from the start.

Your NDA, your terms. No access to production or customer data needed.

Who a payment product has to work for, all at once:

  1. Customer
  2. Merchant
  3. Gateway
  4. Acquirer
  5. Bank
  6. Card network
  7. Regulator
500K+monthly transactions on platforms I led
100+banking, technology and partner integrations
500+merchants onboarded across payment ecosystems
600,000+users migrated to a new payments platform

Products launched across the Caribbean and Africa.

When I can help

Who this is for

You're launching a wallet or a merchant product.

You know the market, but not yet which features, partners and pricing the first version needs.

You're a bank adding a digital product.

A wallet, merchant services or a central bank digital currency offer, built within the regulator's rules and still better than what customers already have.

You're adding a new way to pay or entering a new market.

QR payments, payment links, Tap-to-Pay or online acquiring, in a market you already serve or a new one.

Your product needs payments built in.

A marketplace or platform that earns a commission per transaction needs payments inside the product, and partners to run them.

Your payment project has stalled.

The integration is late, a partner bank is slow, or the scope keeps growing.

Expertise

What I know from the inside

Payment products depend on more than good product work. Banks, card networks, regulators and distribution partners shape what you can launch and when. That is where I have spent the last eight years.

Merchant acquiring

In-store, online, QR codes, payment links, SoftPOS and Tap-to-Pay.

Online checkout

Payment gateways and 3-D Secure card checkout, for merchants with or without a website.

Wallets

Consumer wallets, cashback and value-added services, and a central bank digital currency wallet for a bank.

Merchant onboarding and distribution

Direct merchants, enterprise clients and white-label partners.

Partnerships

Banks, payment-infrastructure providers, card networks and regulators.

Market entry

Comparing routes into a new market and choosing a focused first offer.

Cases

Three payment launches, in numbers

Amber Pay · Caribbean

From concept to 500,000+ transactions a month

Small merchants were moving from cash to cards, many without a website. I led product from concept to market: eLink payment requests by WhatsApp, text or email, links, QR codes and 3-D Secure checkout, plus online stores, loyalty and fundraising.

500K+
monthly transactions
$500K+
investment secured
100+
integrations
500+
merchants via a white-label partner

In payments, the platform, partnerships and route to the customer have to be designed together.

InstaPay · South Africa

From a won tender to a joint-venture payments brand

We won a tender for a digital payments platform with a local infrastructure partner. When the client did not proceed, we kept the product and launched it as InstaPay: a wallet, merchant acquiring, cashback and value-added services.

600,000+
users migrated
500+
merchants
30+
bank and partner integrations
50/50
joint venture

A client project that stalls can still become a product, launched with the right partner.

CBDC wallet · A leading Caribbean banking group

A central bank digital currency wallet that does better than the first launches

Banks had to offer the new central bank digital currency, and the first wallets fell short. I led product strategy, scope and roadmap with the bank, within the central bank's requirements.

3 years
contract with the bank
$30K
monthly recurring licensing

In a regulated market where everyone must comply, the product experience is what sets you apart.

For your third-party risk review

Answers for your procurement and compliance team

Banks review an independent consultant as a third party. Here is what you will get in writing before we start.

Confidentiality

I sign your NDA. Product work doesn't require access to production systems or customer data.

Data handling

A one-page policy: what information I receive, where it is kept, who can see it and when it is deleted.

Subcontractors

No one else works on your project without your written approval. If development is involved, the build team is my development partner, named and agreed with you in writing before work starts.

Development partner

If you need a build team, I describe in writing how the partner is selected and supervised. You contract with them directly, and any referral fee is disclosed in writing before you sign.

Who you work with

Me personally: nearly nine years leading product, a seat on the board of an international technology group from 2017 to 2023, and more than ten years in corporate banking. CV and references on request.

Contracting

Services are provided by [Company name] LLC, registered in Dubai.

Request the due diligence pack
Formats

How to start

Product Clarity Session

From $300

For fintech founders and product teams with one hard decision: first market, partner bank, what goes into the first release.

Review of your materials, a 75–90 minute session and a written plan you keep: key decisions, risks and next steps.

Book a Clarity Session

Scoped pilot for banks

Agreed through your procurement

For banks and regulated companies.

A fixed scope, timeline and fee, for example a product concept and roadmap for one digital product.

Discuss a pilot

Product Diagnostic

Priced after the call

For payment projects that have stalled.

A review of the product, the integrations, the partners and who owns the code and accounts, and a 30–60 day action plan.

Ongoing advisory and launch support

Priced after the call

For teams that need steady product leadership through build and launch.

Regular working sessions, roadmap and decision reviews, coordination with development and partners, and fractional product leadership where needed.

Every format starts with a free 20-minute call. You then get a one-page proposal with options within two business days.

Contact

Building a payment product? Let's find the next step.

Tell me briefly what you're building and what's in the way. You'll get a confirmation straight away and a personal reply within a few hours on business days.

Prefer to talk directly? Email katerina@ksadvisory.tech · Book a call · LinkedIn

Where is your product now?

Your details are used only to reply to you. Privacy policy