Services
Build · Migrate · Audit · Lead
Four ways to work with me, each fixed scope with a number attached. I build the platforms money runs through — marketplaces, wallets, escrow, billing — from scratch; I move existing billing between providers without downtime; I audit what you already have; and for teams with no owner for any of it, I am that owner, monthly.
The audit is the small first yes. Its fee is credited against whatever you book next.
01 / Build
The money layer, or the whole platform, from an empty repository
€12,000–25,000 per build · whole platforms priced per phase
Fixed scope, fixed fee, handed over with the architecture written down. You own the code from the first commit.
02 / Migrate
Move recurring revenue between providers without customers noticing
Fixed fee, quoted after the audit · 2–6 weeks
Card vaults re-tokenized, mandates rebuilt, billing state transferred, staged cutover, reconciliation your finance team can audit. Adyen, Braintree, PayPal, Chargebee, Recurly, NMI, Checkout.com to Stripe — or Stripe Billing installed properly the first time.
03 / Audit
Find out what your billing, payouts or ledger is actually doing
€3,000–5,000 · 5 business days
Five business days inside your Stripe or Adyen setup. Written findings with revenue at risk per row, a 60-minute readout, and a priced proposal for the fix — or a written “nothing to fix here.”
Which rung first?
Live revenue and a nagging feeling → the audit. A half-built marketplace money layer → the audit, then the build from where you are. Nothing built yet → straight to a build conversation. A migration someone proposed → the audit says whether it's needed, and is credited if it is.
04 / Lead
A senior owner for billing and platform, monthly
€8,000–15,000 per month · not by the hour
For teams whose billing and platform roadmap have no owner: architecture, vendor decisions, delivery, and the judgment of someone who has seen the failure modes before.
After a build
Every build is handed over so you can run it without me. If you want me to stay on, this is how — the same engineer who wrote the ledger owns the roadmap. Agreed separately, never a surprise invoice.
Also available, on request: automation & ai systems — the operations tooling I run my own practice on, installed in yours.
How it works
What every engagement has in common
Fixed scope, fixed fee
The scope is written before the fee is agreed, and the fee doesn't move. No hourly meter, no discovery theater.
One senior engineer
You get me — from the ledger schema to the deploy. A vetted network for design and mobile when scope needs it; one point of accountability.
Handed over, owned by you
Repositories, accounts and infrastructure in your name from day one. Architecture doc and runbook at the end.
Team pace, solo invoice
I run an agent fleet for the mechanical work behind the review gates I use on my own production systems. The judgment is mine.
Who this works for. Founders and operators who know what they want built — a marketplace, a billing system that has to move, a roadmap with no owner — and don't want to project-manage getting there. You approve outcomes, not steps; I make the calls, flag the bad ideas, and ship. If you want to be in every decision, an agency is a better fit, and I'll say so on the first call.
Not sure which rung fits?
Describe the problem in plain language. I'll tell you what it needs — even if the honest answer is that it doesn't need me.
I reply within one business day. Now booking new engagements.