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+31 (0)6 25 02 06 32quintin@flowfive.nlAmsterdam, Netherlands
01 — Selected work

Work I carried from business case to launch.

Nine cases from eighteen years in marketplaces, payments and SaaS: enterprise platforms, national payment and shipping launches, API partnerships and an early-stage product. The hands-on web builds sit in the portfolio.

Booking.comComplianceContent migration
Q1–Q2 2025

One gateway for all compliance content

Partners rely on the Partner Hub for information they are legally required to act on, but compliance content had grown scattered across the platform. I led the programme to bring all of it into one standalone section: a single, central gateway for content about legislation and laws.

Aligned stakeholders, UX and the development team on an approved design and an implementation plan, then ran the six-month migration itself. Critical compliance information is now easy for partners to find.

  • Approved UX design and implementation plan before build
  • Six-month migration across legal, UX and engineering
  • Legislation-critical information findable in one place
Booking.com Partner Hub compliance section displayed on a laptop
Booking.comAI & searchPlatform
Q2–Q3 2024

LLM summaries on 1,100+ Partner Hub pages

Booking.com’s Partner Hub is the help and knowledge platform for the accommodation partners behind the world’s largest travel marketplace. It is live in 30 languages and receives around 500k identified partner visits a month. I own platform development and roadmap delivery for the external partner platform.

The headline programme: AI-powered search optimisation, taken from concept through pilot to full global rollout. LLM-generated summaries now sit on 1,100+ content pages, cutting negative search feedback by more than a third and irrelevant-result reports by 41%.

−36.5%
negative search feedback
−41%
irrelevant-result reports
30
languages live
The Booking.com Partner Hub help centre open on a laptop
YourniiSaaSProduct direction
2023

Onboarding 30% faster

Product Director for Yournii, an early-stage marketing-automation platform for SMEs. Set the product vision and roadmap, launched a content-management module, and tied retention work to OKR-aligned metrics.

Usage analytics drove the UX iteration that mattered most: onboarding, reworked to get new customers to first value 30% faster.

  • Content-management module shipped
  • Retention tied to OKR-aligned metrics
30%
faster onboarding
Yournii content-management interface displayed on a laptop
Marktplaats · eBayPaymentsNetherlands
Pre-launch 2021 · launched Apr 2022

Buyer protection prepared for nationwide rollout

Around 2020 I moved into Marktplaats’ Transactional Team, the business product team responsible for the payment and shipping stages of the buyer and seller journey. Making transactions safer was a company priority. Through 2021, I led the development and pre-launch work for buyer protection: proposition and product management, vendor selection and collaboration, the business case, proposition definition and the required operating processes.

I left Marktplaats in 2021. The service subsequently launched nationwide in April 2022.

  • Nationwide proposition and business case prepared
  • Vendor collaboration and operating processes established
Marktplaats buyer-protection payment and purchase screens
2dehands.be · eBayShippingBelgiumPartnership
2021

Shipping live on 2dehands.be

Following the Belgian payments launch, I was responsible for the bpost partnership and integration that brought shipping into the 2dehands.be proposition.

The work connected commercial agreements, proposition development and product delivery, taking the partnership through to a live rollout for Belgian buyers and sellers.

  • Bpost partnership and integration established
  • Shipping proposition rolled out on 2dehands.be
2dehands.be and bpost shipping partnership illustration
Marktplaats · eBayShippingPartnership strategyCommercial
2021

DHL added alongside PostNL

Marktplaats wanted to expand its shipping proposition beyond PostNL. I mapped the Dutch carrier landscape, evaluated and shortlisted potential partners, and led the commercial conversations and negotiations that moved DHL forward as the second shipping provider.

My role covered partnership strategy, proposition development and the contracting process that prepared the rollout. The final technical and product implementation was led elsewhere.

  • Dutch carrier landscape mapped and shortlisted
  • Commercial negotiations contributed to DHL contracting
Shipping options screen showing DHL alongside Budbee and PostNL
2dehands.be · eBayPaymentsBelgium
Aug 2020

Payments live on 2dehands.be

For the Belgian counterpart to the Dutch launch, I took the Marktplaats payment proposition into 2dehands.be, its Belgian sister platform, from business case to rollout. The service launched in August 2020 in collaboration with Payconiq.

A second national launch in its own right: a different market, adapted proposition, and carried through implementation to adoption.

  • Belgian payment proposition, business case to live
  • Belgian launch delivered with Payconiq
2dehands.be online payment request in the marketplace chat
Marktplaats · eBayContract negotiationCommercial
2014–2018

17+ contracts, one new revenue model

Professional listings flowed into Marktplaats through multi-listing tools. The API partners’ commercial terms had grown ad hoc, on revenue models that no longer reflected the channel’s value. I led the renegotiation: a complete new revenue setup across the partner base, moving Marktplaats to a direct invoicing relationship with the advertising customers behind these tools.

Full contract negotiations with 17+ API partners ran in parallel over the course of a year. Every partner signed by year end, and Marktplaats took ownership of the channel.

  • Direct invoicing between customers and Marktplaats
  • Channel ownership moved in-house
17+
contracts renegotiated
100%
signed within the year
Stack of partner contracts prepared for review, signature and execution
Marktplaats · eBayAPI partnershipsBusiness development
2014–2018

Two new verticals for Marktplaats.nl

Marktplaats’ API partner programme had proven itself in automotive. The brief was to extend it into jobs and real estate. I built the business case and brought it to life by connecting new API partners, feeding listings from job platforms and estate agents into Marktplaats, and introducing new features to both verticals along the way.

Two verticals stood up next to automotive, each with its own partner base and a growing supply of listings.

  • New listings supply from job and real-estate platforms
  • New vertical features shipped on Marktplaats.nl
Diagram of Marktplaats verticals highlighting housing and jobs

Nine cases from an eighteen-year track record, with more behind each of them. If one sounds like your problem, let’s talk.