Jonathan MaurinHi, I'm John. Growth advisor and SaaS builder.

Growth that keeps working when you stop pushing.

Over 10 years of SEO, automation and scalable systems, for clients and for my own products. This is my blog and growth lab.

Work with me
500+companies worked with
+31KDerrick users
+485keywords in Google's top 3 for Deux.io
  • Luko
  • MeilleursAgents
  • Legalstart
  • Axa
  • HEC Paris
  • BlaBlaCar
  • TeamViewer
  • Webedia
  • Deepki
  • Thiga
  • MyLittleParis
  • Wamiz
  • Altaroc
  • Advitam
  • Castalie
  • Blast Club
  • Grosbill
  • EDHEC
  • Newfund
  • Iroko

Results, with the numbers.

Two programmatic systems, what went into them and what they still bring in.

485/658

tracked keywords in Google’s top 3

A programmatic system of 90+ variables behind 500+ pages, built to rank city by city on high-intent searches and generate 35 to 50 leads per month.

Read the case study

Rank tracker listing agency keywords by city, all in first position
42.4K

clicks from Google in the last 12 months

First built once and left alone for two years. Then a real system behind it: new page families in two languages, with daily clicks climbing from under 100 to peaks above 400.

Read the case study

Search Console chart showing clicks and impressions rising over 12 months

Where to start.

The programmatic SEO guide.

17 chapters to generate thousands of useful pages, from personas to production.

  1. 04Understand your personas
  2. 05Define goals and opportunities
  3. 06Create an optimized page zoning
  4. 07Define optimized HTML markup

See all 17 chapters

Stuck before SEO? Read the growth audit guide →

What people say.

Jonathan est très réactif et a su développer des compétences techniques poussées pour mettre en place des méthodes de growth hacking. Au fil du temps, il a su étendre son périmètre de l’opérationnel à la stratégie pour nous accompagner dans notre croissance.
Joel GaudeulFormer client · Revenue & Operations LeaderLinkedIn
One of my favorite tool in my stack. It’s allow me to manage my leads directly in GSheet but also go further into Programmatic SEO. I recommand a lot, every sales or growth must have Derrick his stack
Erwann LefevreDerrick userTrustpilot
I have been using other expensive apps or freemium like phantombuster, but Derrick has replaced them all. I love the simplicity of the Google sheet add-in, but what it best is the efficiency it delivers results with. It is very stable and rarely gives you wrong data.
Julien Walon CohenCEO & Co-founder, DifflyG2
Jonathan Maurin

Agency first, then product.

For eleven years I was co-founder of Deux.io, a growth agency, until my exit in January 2025. Along the way I co-founded Derrick, one day a week at first. It now has more than 31,000 users.

My story →

Published elsewhere

On the workbench

  • Define your Go-To-Market strategyGrowth
  • Hire a growth expertHiring
  • Google Sheets and Apps ScriptProductivity
  • SXO and SEOSEO