LCO.
open for 1 project · Q3 2026 leendert@leendertcoenen.com

Leendert Coenen · builder & product strategist · Belgium

I turn ideas into live products, in days.

Not decks. Not six-month roadmaps. Before I write a line of code I figure out what's actually worth building — then I build it myself, small and sharp, and hand you the keys.

idea → live in days product thinking, not just code fixed fee or rev share you own the code
Book a 30-min call free · no proposal deck

how it goes from here to live

that's not a pitch — see the real ship log ↓

01

Ship log

real projects · real dates · real status

2026 · live

family-split

Live

Splitting a shared trip without the spreadsheet fights. Everyone opens one link — no accounts, no app store — adds what they paid, and the app says exactly who owes whom.

Built for families and friends splitting trips · in daily use

open the live app ↗
family-split expenses list for a Chamonix ski trip: cable car passes, chalet groceries, gear rental, fondue night

2026 · private pilot

Field visit log

Pilot

A one-person gate-automation business was losing invoices because busy days blur together. Now their phone quietly logs every customer stop; an evening summary shows where they were and for how long. Forgotten visits become recovered revenue.

Built for a solo installer · in trial

field visit log day view with demo visits: time, duration, address, invoicing status per stop

2026 · in delivery

City Dog

Shipping

A new website for a dog school in Hasselt — with a twist. After launch the owner just emails what they want changed, and an AI agent makes the edit, previews it, and ships it live. No tickets, no waiting on me.

Built for City Dog, hondenschool in Hasselt · launching soon

City Dog homepage: dog training school in Hasselt, real city locations, small groups
02

The deal, in plain terms

no retainers · no surprises

Two ways to pay — pick whichever fits your project. Both are flexible, and you'll know the exact number before we start.

most common Fixed price

from €1,500one number, and you own it outright

Best when you just want the thing built, live, and yours — no strings.

  • Starter — one sharp tool, from €1,500
  • Custom build — site + tooling, from €4,000
  • Launch and first-year hosting included
Revenue share

little up frontI take on the risk with you

Best when we're building something that earns — a membership, a paid app, a product.

  • €0–750 to start, instead of the full fee
  • then a 15–25% share of what it makes, ~2 years
  • Buy the share out whenever you want
01

You own everything

The code, the domain, the data — yours from day one. No lock-in, no hostage hosting.

02

No agency overhead

You talk to the person building it — me. No account managers, no retainer, no minimum.

03

You see it early

A working version on a real URL within days. We shape it while it's cheap to change.

Not sure which fits? That's the first thing we'll figure out together — and whatever we land on, it won't move once we start.

Leendert Coenen

Who's building it

I'm Leendert — a solo software builder in Belgium, with a product-manager's instinct for what to build before a builder's instinct for how. Most of the value gets created before the first line of code: cutting a vague idea down to the smallest version that actually solves the problem, then sequencing what comes next.

I like problems small enough to ship fast and sharp enough to matter. One person, strategy through delivery, so nothing gets lost in a handover or diluted by a committee.

Off the keyboard I ski and run, and I lose good weekends to Guild Wars and Warhammer. That's not a marketing line — it's why I like building tools for people who care about a craft, a crew, or a world of their own.

Built on Cloudflare · shipped from Belgium · answers his own email