Ange-Ghislain KOUAMEData Engineer
FR

Services

Data you can trust, a brand people remember.

Two crafts under one roof. Data engineering: pipelines, Power BI dashboards, DDI documentation and quality audits. Studio: showcase websites, brand identity, business cards, flyers and motion design. Remote, or on site in Abidjan.

Write to me See the offers

Demonstration Live dashboard

§ 01 / 05

What I can build for you.

Eight offers in two poles. The data offers are backed by case studies you can read; the studio offers by pieces you can see on this site.

Pole 01 · Data

Custom data pipelines

Turn scattered Excel extracts, exports and databases into a clean, documented warehouse that refreshes without surprises.

Discuss this need
For
Administrations, projects and companies whose figures are rebuilt by hand every month.
What you receive
  • A layered pipeline (bronze, silver, gold) in Python and SQL, which can be rerun without creating duplicates
  • A rule catalogue with quarantine: invalid rows are set aside and explained, never dropped silently
  • A star-schema warehouse, ready for reporting
  • An execution log, a data dictionary and a runbook for your team
Tools
  • Python
  • pandas
  • SQL Server
  • T-SQL
  • Jupyter
  • Power Query

Pole 01 · Data

Decision dashboards with Power BI

Dashboards that answer your management questions, with figures you can trace back and defend in a meeting.

Discuss this need
For
Management teams, audit and control units, programme managers.
What you receive
  • A semantic model with documented DAX measures and clear definitions
  • Alerts and thresholds that show what needs attention, and comparability rules that prevent misleading year-on-year changes
  • Printable pages for meetings and reports
  • A handover session and a user guide
Tools
  • Power BI
  • DAX
  • Power Query
  • SQL Server
  • Power BI Service

Pole 01 · Data

Data documentation to DDI standards and NADA catalogues

Document your surveys and administrative datasets to international standards, and publish them in a searchable catalogue with access control.

Discuss this need
For
Statistical offices, ministries, research centres and development projects that must share or archive their data.
What you receive
  • DDI 2.5 and Dublin Core metadata: study, files and variables
  • A NADA catalogue installed and configured, with access levels
  • Documentation templates and a procedure your team can repeat
  • Training for the staff who will document the next datasets
Tools
  • DDI 2.5
  • Dublin Core
  • NADA
  • Metadata Editor
  • MySQL

Pole 01 · Data

Data quality audit and anomaly detection

Measure how reliable your data really is, and find the records that deserve a closer look before decisions are made.

Discuss this need
For
Audit, control and compliance teams; any organisation preparing a migration or a new reporting system.
What you receive
  • A quality report: completeness, duplicates and inconsistencies, with the rows concerned
  • Explainable risk indicators and anomaly detection, evaluated with criteria fixed in advance
  • Integrity certificates proving that the data has not changed since validation
  • Prioritised recommendations for fixing the data at the source
Tools
  • Python
  • pandas
  • scikit-learn
  • SQL Server
  • Power BI

Pole 02 · Studio

Showcase websites and portfolios

A fast, bilingual site that presents you clearly and turns a visit into a contact.

Discuss this need
For
Consultants, independent professionals, small businesses and projects that need a credible place online.
What you receive
  • A site in French and English, readable on a phone, accessible and fast
  • Pages written with you: services, work, profile, contact
  • An administration space to update texts, files and availability yourself
  • Hosting set up on your own accounts, and a handover session
Tools
  • HTML
  • CSS
  • TypeScript
  • Vercel

Pole 02 · Studio

Brand identity

A name, a mark and a few rules so that everything you publish is recognised as yours.

Discuss this need
For
New activities, associations and teams that publish without a shared look.
What you receive
  • A logo in its versions (colour, single colour, small sizes)
  • A palette and a choice of typefaces, with how to use them
  • A one-page brand guide
  • Templates for social posts and presentations
Tools
  • SVG
  • Figma
  • Illustrator

Pole 02 · Studio

Business cards and flyers

Printed pieces that carry your message in a few seconds, and lead to your site with a QR code.

Discuss this need
For
Anyone who meets clients in person: events, shops, offices, trade fairs.
What you receive
  • Business cards, front and back, with a QR code
  • A5 or A4 flyers, posters and roll-ups
  • Print-ready PDF files (bleed and crop marks) and screen versions
  • Advice on paper and printing
Tools
  • SVG
  • InDesign
  • Illustrator

Pole 02 · Studio

Motion design and video

Make a project, a product or a figure understood in seconds: presentation films, animated figures and social media animations.

Discuss this need
For
Companies, consultants and project teams who need to present their work on LinkedIn, in a meeting or at an event.
What you receive
  • A presentation film in landscape and square formats, with captions in French and English
  • Animated figures and charts built from your real data
  • Short animations for social media: announcements, key figures, intros
  • Source files and exports ready for LinkedIn, YouTube or a slide deck
Tools
  • HTML
  • CSS
  • SVG
  • WebCodecs
  • FFmpeg

§ 02 / 05

See the work in motion.

Two films made for this site, rendered frame by frame with original music. They start muted; turn the sound on if you wish.

§ 03 / 05

A studio, pieces you can touch.

Brand, print, web and motion: everything here was designed for my own brand, the way I would design yours.

Brand identity

Mark, palette and typefaces: the guide behind every page of this site.

Flyer

A5 format, written to sell one offer in five seconds. The QR code leads to the offer.

Business card

Front, back and a QR code to the site. Click or tap to turn it over.

732,164 sales retained

Dwelling sales per month, France, 2025

Animated figure

A key figure set in motion, here from the property prices demonstration.

Home page of this portfolio on a computer.
The same page on a phone.

Showcase website

This portfolio: bilingual, accessible, readable on a phone, with its own administration.

Talk about a studio project

§ 04 / 05

How we work together.

A clear frame, short steps, nothing hidden.

  1. A first conversation

    We talk about your data, your questions and your constraints. No commitment.

  2. A written proposal

    Scope, deliverables, schedule and price, as a fixed price or a daily rate.

  3. Delivery in short steps

    Each step ends with a demonstration on your data, so you can check and adjust.

  4. A handover

    Code, documentation and training: your team stays autonomous after the mission.

Quoted after a first conversation, as a fixed price or a daily rate. Remote, or on site in Abidjan.

§ 05 / 05

Data that deserves better?

Describe your situation in a few lines. I reply with first ideas and the possible next steps.

Write to me LinkedIn View selected work