Quick answer
Marouane Gazouzi is a Senior Data Engineer and freelance consultant in Paris, with 8+ years of building and migrating large-scale data pipelines for Carrefour, Bouygues Telecom and Casino Group. He co-founded Avenia Consulting in November 2025 and builds his own products in public, among them Readyo, an AI interview coach for iPhone, three apps for Apple's foldable iPhone Duo on the App Store, and Whipback, a Mac menu bar app for Claude Code and Codex.
Updated
About
Senior Data Engineer and freelance consultant with 8+ years of experience building and migrating large-scale data pipelines for major French enterprises. As co-founder of Avenia Consulting, I help companies modernize their data infrastructure — from legacy systems to cloud-native architectures on GCP.
I specialize in cloud migration (Teradata/Oracle to BigQuery), ETL pipeline engineering, and data warehouse architecture. I've led critical data projects at Carrefour (CAC 40), Bouygues Telecom, and Casino Group — handling everything from 16 TB/day log migrations to real-time pricing pipelines that serve thousands of stores.
Master's degree in Computer Science from Université Jean Monnet. Based in Paris, France, I work with enterprise teams across Europe on their most complex data challenges.
Services
Data Pipeline Engineering
I design and deploy end-to-end data pipelines using Kafka, Pub/Sub, Airflow, and IBM MQ. From ingestion to transformation and delivery, I build systems that handle millions of events per day with built-in monitoring, error handling, and automated recovery. Whether it's real-time streaming or scheduled batch processing, I deliver production-grade pipelines that scale with your business.
Cloud Migration
I migrate legacy data systems — Teradata, Oracle, on-premise warehouses — to GCP and BigQuery. My approach covers the full migration lifecycle: assessment, schema mapping, data validation, parallel running, and cutover. At Bouygues Telecom, I led the migration of 16 TB/day of web application logs. I ensure zero data loss, minimal downtime, and measurable cost savings post-migration.
Data Warehouse & Analytics
I architect and optimize Data Warehouses, Data Lakes, and DataMarts on BigQuery and GCP. This includes data modeling, partitioning and clustering strategies, query optimization, and cost management. I also build KPI dashboards with Looker to give stakeholders real-time visibility into business metrics — from pricing analytics to operational monitoring.
Technical Consulting
I provide strategic guidance on data architecture decisions, ETL process optimization, and team upskilling. This includes code reviews, best practices workshops, and hands-on mentoring for junior and mid-level data engineers. I help enterprise teams establish standards for data quality, testing, documentation, and CI/CD for data pipelines.
Experience
Carrefour France
2023 - PresentDesigned and deployed a complete pricing data pipeline — from calculated prices in BigQuery to point-of-sale systems across thousands of stores. Migrated legacy Oracle batch processes to BigQuery, reducing processing time from hours to minutes. Built real-time KPI dashboards in Looker for price monitoring, enabling merchandising teams to track pricing changes and anomalies as they happen. Orchestrated workflows with Airflow and integrated streaming via Kafka and Pub/Sub.
Bouygues Telecom
2022 - 2023Led the migration of web application logs (~16 TB/day) from Teradata to BigQuery — one of the largest data migration projects at Bouygues Telecom. Designed the target architecture on GCP, implemented automated data quality controls comparing source and destination datasets, and optimized ETL processes in collaboration with DevOps and Data Engineering teams. Delivered the migration on schedule with zero data loss and a 40% reduction in infrastructure costs.
Casino Group
2018 - 2022Owned the core data platform for 4 years, developing and maintaining ETL workflows with Informatica and Teradata at scale. Created and optimized datamarts for pricing strategy analytics used by category managers. Supervised production processes, managed database performance tuning, and established monitoring and alerting for critical data pipelines. Mentored junior engineers and established team coding standards.
Tech Stack
My core expertise spans the Google Cloud Platform ecosystem, with deep hands-on experience in BigQuery, Airflow, and Kafka for building production-grade data pipelines at enterprise scale.
Startups
Readyo
FounderAI interview coach for iPhone. A lifelike AI interviewer asks questions out loud in English, French, Spanish or Arabic, follows up on your answers, then scores you on relevance, structure, evidence, clarity and composure.
Two Peas
FounderA two-player family game on one phone, made for iPhone Duo. A kid and a grown-up each play on their own half of the screen, at the same time: block puzzle races and Pose and Color. No ads, no account.
Fold Days
FounderYour year as 365 dots and the days left, with one line a day, countdowns and widgets. Made for iPhone Duo, where it opens into two pages: the year on the left, today on the right.
Quran Duo
FounderA two-page mushaf for iPhone Duo that opens like a book, with the translation beside the Arabic, recitation verse by verse, khatm progress and bookmarks. Free, no ads, no account.
Whipback
FounderA Mac menu bar app for Claude Code and Codex. When your agent waits on you, a whip cracks across your screen: three times, then it stops, and it never steals focus. Whip an idle agent back (trackpad slap or ⌃⌥W) and it types “Continue.” macOS 14 or later.
Strike Window
FounderA fishing forecast for iPhone: an hourly bite score from 0 to 100 for any spot in the world, with every point explained (pressure, moon, light, wind, temperature and, at US coast spots, the tide). No account, no ads, no tracking.
Pare
FounderA swipe storage cleaner for iPhone: your biggest photos and videos first, swipe left to clear, right to keep. Large videos, screenshots, similar shots and burst frames, plus video compression. Everything stays on your iPhone. No account, no ads, no tracking.
Pantastic
FounderKitchen tips you swipe through, for iPhone and iPad: 365 bite-size tips, a Myth or fact card game and 70 step-by-step fixes for kitchen fails. In 36 languages, with units that fit where you live. No account, no ads, no tracking.
First 72 Hours
FounderA 72-hour emergency kit for iPhone, sized for your household and your country: checklist, shopping list, the official preparedness advice of 199 countries, emergency numbers, flashlight, SOS and compass. Works offline. No account, no ads, no tracking.
Avenia Consulting
Co-founder & CEOData strategy & cloud engineering consulting for major enterprises, co-founded in 2025. It builds on eight years of data work for Carrefour, Bouygues Telecom and Casino Group.
Dailii
FounderAI-powered activity report management for consultants and freelancers. Describe your month in plain text, AI fills your CRA in 10 seconds.
Databubble
FounderAI Model Explorer. Explore trending AI models across categories. Visualize downloads, benchmarks, and growth trends with interactive bubble charts.
Adjugé
FounderCourt real-estate auctions across France, on a map: starting price, hearing date and the actual prices of more than 20,000 past sales.
MockFlick
Founder3D animated clothing mockups in seconds. Put your 2D design on a blank t-shirt, add wind and walking animations, and export the video.
HalalBid
FounderA leaderboard of halal-verified products where rank is rented by auction. Bids from $5, a guaranteed 24-hour hold, and you pay only if you win.
Crux
FounderLearn what works on your own X account. Crux reads your posts and shows which hooks, formats, topics and times work for you — and stays quiet when chance alone could explain it.
bag.gazouzi.com
FounderRent a sticker spot on the backpack I carry across Paris every day. Eight spots, one auction every 14 days: the loser is never charged, the winner only once the photo is up.
motion-launch-videos
Open sourceOpen-source Claude Code plugin that turns a short brief into a looping kinetic-typography launch video, rendered to MP4 with real motion blur and a seamless loop.
Duology
Open sourceOpen-source (MIT) Claude Code skills for designing, building, testing and shipping apps on iPhone Duo: 30 skills and 5 app recipes. Fold Days and Two Peas were built with it.