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Deiss Yehouenou.
  • Seeking an apprenticeship · Efrei Paris 2026-2028

Deiss YehouenouLooking for a data analyst, data engineer or data project manager ?That might be me.

I turn data into decisions you can defend, and I build the systems that feed them.

A qualified general engineer, specialising in data and artificial intelligence at Efrei Paris. Profitability dashboards at Société Générale, decision reporting and explainable scoring at PGS Africa. I also build the web products that generate that data, and ship them.

Email me

The apprenticeship rhythm

Specialisation in data engineering and artificial intelligence — Efrei Paris

31 August 2026 → 30 June 2028

On average 1 week at school for 2 weeks at the company

Volume
602 training hours, spread over 86 days.
Next blocks
5–9 October, then 26–30 October 2026.
Availability
Immediate, on every day not marked as training in the calendar.
Notes on the calendar

Averaged over the 86 days in the official calendar. The blocks are not evenly spread: some months hold three weeks, others none.

The detailed calendar covers the first year. The second-year schedule and the signing deadline have not yet been issued by the school.

On a timelineWhat happened, and when

Career from 2022 to 2028
  1. École d'ingénieurs, La Rochelle
    Sep 2022 — Jun 2025
  2. Société Générale
    Jan 2025 — Jun 2025
  3. HairByGloria
    Jun 2025 — May 2026
  4. PGS Africa
    Oct 2025 — Jan 2026
  5. Efrei Paris
    Aug 2026 — Jun 2028

What I doThree ways into the same problem

I do all three, which is what lets me follow a piece of data from where it is created to the decision it serves.

  1. 01

    Measure

    Turning data into decisions you can defend.

    Pilotage financier — Société Générale · Scoring explicable — PGS Africa · Reconstitution tarifaire

    5 projects
  2. 02

    Build

    Complete web products, shipped and used.

    HairByGloria · deiss.website · Festichill — billetterie de festival

    4 projects
  3. 03

    Automate

    Getting systems to do the work, with guardrails.

    Agents de relation client · AI Software Factory · Chaîne de candidature vérifiée

    4 projects

Experience and educationExperience

See the full career
Oct 2025 — Jan 20264 mo

Innovation project management assistant — AI & big data

PGS Africa

Explainable scoring MVP to surface at-risk cases, plus industrialised decision reporting.

  • −40 %detection time for at-risk cases
  • ~5 %of 300+ cases flagged as critical
  • Python
  • Power BI
  • DAX
  • Power Query
  • ETL
Jun 2025 — May 20261 yr

Full-stack & AI developer — platform designer

HairByGloria

Designed and shipped a complete booking platform, with AI agents at the core of the product.

  • +70 %in bookings
  • Next.js
  • React
  • Supabase
  • PostgreSQL
  • Vercel
  • OpenRouter
  • Meta Graph API
Jan 2025 — Jun 20256 mo

Project management assistant — financial steering (final-year project)

Société Générale — Securities Services

Centralised cost database across business units, and profitability dashboards used by financial controllers.

  • −20 %workload on repetitive tasks
  • SQL
  • Power BI
  • DAX
  • Excel
  • Lean

HairByGloria

  • In production
  • For a client

A complete booking platform for a salon: customer site, booking funnel, management back-office and built-in AI agents.

hairbygloria.fr

  • Next.js
  • Supabase
  • PostgreSQL
  • Sentry
  • PostHog
  • bcrypt
  • sharp
  • Vercel

deiss.website

  • In production
  • Personal project

The site for my digital engineering practice: a service catalogue, email enquiries, and a public tool that audits the tracking of any third-party page.

deiss.website

  • Next.js
  • TypeScript
  • PostHog
  • Resend
  • Vercel
  • Meta Pixel

Festichill — billetterie de festival

  • In production
  • For a client

Online ticketing for a festival in Cotonou: a three-screen purchase funnel, limited stock, mobile or cash-on-delivery payment, e-ticket by messaging.

  • 300+tickets sold

festichill.com

  • Next.js
  • Supabase
  • Zod
  • PostHog
  • Playwright
  • Vitest
  • Vercel

Pilotage financier — Société Générale

  • In production
  • At work

A database centralising direct, indirect and variable costs across business units, plus profitability dashboards used by financial controllers.

  • SQL
  • Power BI
  • DAX
  • Excel
  • Lean

Scoring explicable — PGS Africa

  • MVP
  • At work

An analytics MVP that automatically categorises at-risk cases from event data, and can say why.

  • Python
  • Power BI
  • DAX
  • Power Query
  • ETL

Reconstitution tarifaire

  • In production
  • For a client

Rebuilding a catalogue's complete price history from analytics events alone, to verify no customer ever paid an inconsistent price.

  • PostHog
  • JSONL
  • Python

Agents de relation client

  • In production
  • For a client

Conversational agents wired into Messenger and Instagram: they qualify the request, check genuinely available slots, and hand over to a human when needed.

  • OpenRouter
  • Meta Graph API
  • Webhooks
  • Next.js

AI Software Factory

  • Prototype
  • Personal project

An agent-driven software production pipeline, framed by explicit contracts and verified against reference tasks.

  • Python
  • Pydantic
  • YAML
  • Node.js

Chaîne de candidature vérifiée

  • In production
  • Personal project

The system I use to find my apprenticeship: a CV tailored to each offer, generated from a single source of facts, which cannot be sent until it clears a blocking check.

  • Python
  • python-docx
  • pdfminer
  • Google Drive
  • Google Sheets
  • Claude Code

Education

Aug 2026 — Jun 20281 yr 11 mo

Specialisation in data engineering and artificial intelligence, apprenticeship

Efrei Paris — grande école d'ingénieurs du numérique

Two years as an apprentice, from 31 August 2026 to 30 June 2028, following the engineering degree. Training runs in multi-day blocks, the rest of the time is spent at the company.

  • Data engineering
  • Intelligence artificielle
Sep 2022 — Jun 20252 yrs 10 mo

General engineering degree

École d'Ingénieurs Généralistes en Systèmes Industriels — La Rochelle

General engineering school in industrial sciences. Multidisciplinary training: data, information systems, project management.

  • Python
  • R
  • SQL
  • Power BI
  • Unity