fullpicture

Nicolas Filzi

Fractional CTO & Product Engineer

One AI-enabled senior operator. Stack-agnostic, tool-agnostic, AI-augmented engineering from strategy to production code, for startups, scale-ups and non-tech businesses.

Nantes, France nicolas@fullpicture.studio www.fullpicture.studio github.com/nfilzi linkedin.com/in/nfilzi

10+

Years shipping

Production systems since 2016

10+

Clients served

Startups to hospitals

3.5y

Longest engagement

Platform built & run end to end

Teaching engineers

Le Wagon · 10+ cities

Profile

I've been turning ideas into production systems for over a decade: backends, platforms, APIs, AI pipelines. The kind of code that runs businesses, not just demos.

Along the way I spent 8 years teaching engineers at Le Wagon across Amsterdam, Tokyo, Nantes and Copenhagen. Teaching thousands of students to think about data, architecture and product didn't make me less of a builder; it made me a sharper one.

Today I work as a fractional CTO and product engineer for teams that need senior firepower without the agency overhead or the full-time ramp-up. I embed in your team to untangle your problems and bring your ideas to life.

Expertise

Backend & Data

Ruby on Rails · Python · PostgreSQL · APIs · Data modeling · Real-time systems

Frontend & Mobile

JavaScript · TypeScript · React · React Native · Expo · Tailwind · Stimulus

AI / LLM

LLM pipelines · AI agents · LLM search & enrichment · Workflow automation

Leadership

Fractional CTO · Architecture · Code review · Mentoring & pairing · Vendor management

How I can help

Build

Full-stack product engineering: features, infrastructure, integrations, AI/LLM pipelines.

Lead

Fractional CTO: architecture, hiring, process, technical direction.

Lead + Build

Both roles, one person: technical direction and the strongest builder on the project.

Solve

Scoped engagements: audits, architecture reviews, rescue missions, second opinions.

Selected work

High StickersLead

~3 yrs

Rebuilt a 10-year e-commerce platform so well the founder became its top code contributor.

30k users migrated10k orders preservedRails · Stripe · Pennylane

PAJ by ImparatoLead + Build

Ongoing

Shaped a theatre-discovery platform from zero: product, architecture, AI-powered search, a team of 4.

787 classification dims500+ plays enrichedRails · React · Mistral AI

Iris GalerieLead + Build

Ongoing

API tech lead connecting ERP, mobile and desktop systems across 150+ points of sale worldwide.

56% of API commits12–16 people coordinated150+ galleries

KoudetatBuild

2 yrs

From concept to streaming platform as part-time CTO: product and tech strategy in one seat.

Part-time CTOStreaming platform builtServer → front end

Plancton by PimpantLead

3.5 yrs

1,000+ personalised kids’ science magazines shipped monthly. Owned the platform end to end.

1,000+ magazines / mo3.5-yr engagementMentored a junior dev

CHU Nantes · Astreinte VitaleBuild

Delivered

Replaced paper call sheets and manual phone cascades for hospital emergency teams.

24/7 critical coveragePublic healthcareReliability-first

Guest SuiteSolve

Delivered

A CEO’s fast-moving ideas shipped as production tools every two weeks, no overhead.

2-week max turnaroundProduction toolsSaaS

AsmodeeBuild

Delivered

Daily intelligence on every crowdfunding campaign in the market: raw data to dashboards a team acts on.

BI platform builtDaily dashboardsNon-technical readers

What clients say

“

While he may have had the highest hourly rate I’ve ever paid, he ended up costing me the least overall, due to his speed and effectiveness.

Emmanuel · CEO @ High Stickers

“

He gets it quickly. He delivers quickly. And he delivers quality.

Thomas · CEO @ Guest Suite

“

His blend of business vision and coding talent makes him a key asset to any team.

Valentin · CEO @ Koudetat

Ventures & teaching

Founderpepline.ai: my own SaaS. Lead-facing AI agents that retire the contact form. They interview inbound prospects, qualify them against your rules, and hand back a scoped brief. In beta.

Co-founderstellaire.studio: a Nantes startup studio taking founders from idea to market. I bring the product & tech side, from idea validation through MVP and go-to-market.

2016–2022Lead teacher, Le Wagon: bootcamp instructor and curriculum contributor across 10+ cities worldwide. Thousands of engineers taught.

2019–2021Le Wagon franchise co-owner, Nantes & Rennes: ran the franchise: B2C growth (workshops, events, paid marketing) and partnerships with schools, businesses & incubators. Grew earnings 50%+ two years running, then sold it back to Le Wagon HQ.

Since 2016Shipping in production: backends, APIs, e-commerce, mobile and AI pipelines for startups, scale-ups, hospitals and non-tech businesses.

How I work

Building the wrong thing well is the most expensive mistake in tech: business context first, architecture second.
You’ll see progress every week, not every quarter. Scope tight, ship real, measure, iterate.
You’re paying for judgment, not just execution: I’ll flag the risk no one’s talking about.
You own everything at the end: code, infrastructure, docs. Built for your autonomy, not dependency.

Education

RNCP-certified title

Full-stack web development, Ruby on Rails

Le Wagon Paris · batch #15 · 2015

Audencia Business School

Programme Grande École (dropped out)

Nantes

Prépa HEC

Preparatory classes for French business schools, Lycée Jacques-Decour

Paris · 2010–2013