Fractional CTO A senior technical leader working part-time across several companies.

Your tech team is underwater. I've been there.

Fractional CTO for founders who want a real technical partner, not another vendor.

Let's talk about your project Free pre-audit See how I work
12+ years in the field5 → 25 team members scaled-80% critical bugs
Available for new projects
12+years in the fieldFrom lead developer to CTO, embedded long-term in two companies→ My journey
80%bug reduction10 bugs/week → 1-2/month in 6 months→ The Gridky story
5 → 25team membersWithout slowing down delivery, zero major incidents→ The PubliSpeak story
85%accessibility complianceA custom AI approach, not an off-the-shelf tool→ The PDF Accessible story
Sound familiar?
  • 01 Your deployments are stressful events
  • 02 Your lead dev is carrying everything on their shoulders
  • 03 The roadmap slips every quarter
  • 04 Production bugs have become background noise
  • 05 You're hiring but the team isn't scaling
  • 06 You know something needs to change, but not where to start
Fast paths

Choose the path that best matches your situation.

You can browse the site by expertise, but leaders usually arrive with a decision to make. These three pages are shortcuts.

01

I need a diagnosis

Make risks, priorities and next decisions explicit before investing more.

See the diagnosis
02

I need a fractional CTO

Install senior tech leadership without hiring a full-time CTO.

See the CTO format
03

I need to name the problem

Start from business symptoms: slow roadmap, team dependency, debt or risk.

See situations
Scope

Fractional CTO, not just technical audits.

I help when technology affects product, team, delivery or executive decisions. The diagnosis is a way to understand the situation, not to lock you into a narrow service.

01

Architecture & tech debt

Know what to keep, simplify and modernize.

02

Tech team & organization

Clarify roles, seniority and ownership.

03

Delivery & quality

Reduce friction between idea, engineering, QA and production.

04

Roadmap & tradeoffs

Connect product priorities, technical constraints and business goals.

05

Reliability & security

Make incidents, risks and critical dependencies visible.

06

Tech governance

Turn technical uncertainty into leadership decisions.

07

Internal tools & data

Stabilize CRM, back-office, automation and data flows.

08

Applied AI

Frame useful, secure and measurable AI use cases.

Case studies

Results, not promises.

Fintech & Real Estate

Gridky

40,000 properties, 12 tax regimes, banking-grade security. When the machine has to be reliable before it can be smart.

80%bug reduction: 10/week → 1-2/month in 6 months

-80%

Production bugs

x5

Deploy frequency

-15%

Infrastructure costs

Read the full story

Architecture & Scale

PubliSpeak

From POC to microservices SaaS, without losing a client or disrupting production. DDD and event-driven architecture in service of growth.

9 yearsof organic growth at 10%/year

9 yrs

Continuous growth

5→25

Team size

Read the full story

AI & Innovation

PDF Accessible

No, this wasn't just "plugging in ChatGPT." A hybrid approach using deterministic algorithms, symbolic AI and LLM Vision moved compliance from the market's 30% to 85%.

85%compliance with the strictest accessibility standards

85%

Compliance

Hybrid

AI architecture

Read the full story

Platform & Product

IpedisConnect™

Hundreds of companies steering their accessibility strategy from a single platform. The management platform adopted by the leading digital accessibility organisations.

3,000+audits completed for 200+ clients

3,000+

Audits completed

200+

Clients

Read the full story
See all case studies
The Drynuary

When I joined Gridky, the team had 10 production bugs per week. Observability was ignored because it was too noisy. So I stopped pretending the crisis didn't exist.

I personally led bug reporting, spent 2 hours a day fixing them, then rallied the team for a dedicated month-and-a-half sprint.

Result: 80% fewer bugs. Test coverage from 10% to 50%. The team calls it the Drynuary.

Read the full story
Collaboration

How I Work

The Diagnosis: Tech & organization

5 days to clarify risks, priorities and an action plan.

5 days · €3,000 · Concrete plan

The Mission

Defined scope, clear milestones, predictable outcome.

Scoped · Milestoned · Delivered

The Partnership

Embedded fractional CTO, annual roadmap.

Embedded CTO · Roadmap · Hiring

The Collaboration

Flexible format, designed with you.

Flexible · Tailored · Co-built

Find the right fit
Testimonials

What people say about me

Yanis est en réalité un CTO hands-on extrêmement complet et équilibré. Sa productivité est impressionnante mais plus encore, c'est le plaisir de travailler avec lui qui marque : rapide à comprendre, clair dans sa communication, excellent en travail d'équipe, toujours enthousiaste et doté d'un grand sens de l'humour.

"Yanis is a hands-on CTO who is extremely well-rounded and balanced. His productivity is impressive, but what really stands out is the pleasure of working with him: quick to understand, clear in his communication, a great team player, always enthusiastic and with a sharp sense of humor."

Karim Cassam Chenaï · CTO / RSSI, Gridky
Talk

Let's just talk about your situation.

Thirty minutes. No strings attached. You describe where you are, I ask the questions that matter, and together we figure out if I can help or not.

Let's talk about your project

No slides. No sales pitch. Just an honest conversation.