Venture builder · Netherlands & Spain
We don't watch from a cap-table.
We build the venture.
Opperly is Jeroen de Leijer's venture builder. It starts, co-owns and operates companies — sometimes from scratch with founders, sometimes as an in-house programme inside a corporate. Each one carries its own set of shareholders and partners.
How Opperly is engaged
Investors and corporates bring Opperly in to build something new. We take the operating seat and do the building:
- A new venture, from zero
- A proof of concept
- Teams, hired and running
- A new satellite office
The model is a mix of fixed and result-based fees — part of what we earn depends on what the thing we built goes on to do.
The Opperly object
One operator at the centre. Five ventures — and one open seat.
Twenty-five years of building, on one board. Select a node to read its record.
Who sits on the other side of the table
Four kinds of partner.
Capital that comes with an operator attached.
Back ventures we start and run ourselves, with a seat at the table and a builder — not a manager — on the inside.
A new line of business, built alongside yours.
We start the venture next to the company you already run, staff it, prove the model, and hand you the keys — or keep running it.
A co-founder who has done it five times.
Bring the idea or the early company; we bring structure, capital, engineering and a share of the work — and of the upside.
An MVP built outside, so nothing inside slows down.
We run the proof of concept as a separate venture — no roadmap disruption, no internal politics — and bring it in once it works. Or, as at T-Mobile International, we come inside and stand the new unit up ourselves.
The operator
One builder at the centre — not a committee.
Jeroen de Leijer
- BasedNetherlands & Spain
- Building since2001
- Ventures on the boardFive
- ExitsTwo
Jeroen has spent his working life starting and growing companies — as a founder, as the person hired to build a unit inside someone else's, and as a shareholder who stays after the launch. Opperly is where that work is held.
He started with Tria Mobile in 2001 — first to market with a range of value-added services, sold in 2006. He was then brought into T-Mobile International to set up its Mobile Marketing and Advertising Unit, from mandate to running team. He built Brickfund from zero to €30M under management and sold his shares in 2019. Blue Code Solutions, started in 2020, has gone from zero to €3M revenue and is still running. Tech and Turn — an AI-driven turnaround with Battersea Park — is the newest on the board.
What that means in practice: Jeroen takes the operating seat. He puts the first team together, sets the structure, and carries the early years — the part most investors hand to someone else. The share Opperly holds is the consequence of that work, not a substitute for it.
Start something
Tell me what you want to build.
Send a paragraph — the idea, the early company, or the unit you need stood up inside your organisation. You get a clear yes, no, or "tell me more" within five working days. No drift, no polite maybes.
[email protected] →Confidentiality always