-- whoami
Hi, I'm Nejib.
Lead Data Engineer and full-stack developer based near Paris. For more than 15 years I have been turning raw data into products that run in production.
My background is data: designing ETL/ELT pipelines, modelling, making processing chains reliable and delivering enterprise-scale reporting.
Alongside that, I built my own products. Offres-Travail.com gathers most of the French job market every day. Free-LLM.com lists the free LLM APIs. Pylon-Monitor took me from software to hardware: firmware, electronics, enclosure, shop and shipping.
I do everything myself, from database to interface, from server to SEO. That is what lets me ship fast, measure, and keep every product alive over time.
-- principles
How I work
Ship, then improve
A first version online quickly, then iterations driven by numbers and feedback.
Measure before claiming
Search Console, analytics, logs: every decision rests on real data.
Keep costs under control
Self-hosting, services shared across sites and capped cloud budgets.
Built to last
Sites that are maintained, updated and secured, not abandoned prototypes.
-- git log --since=2026
Launch and rebuild log
The sites are not frozen: here is what was launched or rebuilt in recent months.
-
nejib.com
The 29 case studies of this portfolio go live
-
Free-LLM.com
SEO pass: 108,000 duplicate comparisons cut to 600 useful pages
-
Tarjma.com
Information pages in 10 languages and the Arabic mobile layout reworked
-
StatMemory.com
Complete rebuild: new design, vulnerabilities closed, richer reports, same URLs
-
Rai2015.com
35,330 articles reclassified into 14 sections and 59 subsections
-
Cables-Solaires.com
Back-office rebuilt: “to do” dashboard, tabbed orders, CSV export
-
PDF-Summarize.com
Rebuild: Q&A with page citations, OCR, 39 pages × 11 languages
-
MoniWatt.com ↗
MoniWatt announced, the next product for solar inverters
-
Linux-Alternative.com
New engine: Flathub and Repology data, 5 languages, automatic updates
-
Ma3loumet.com
The Arabic magazine relaunched, with a source for every fact
-
Pylon-Monitor.com
Third generation of circuit boards
-
L-Actualite.com
L’Actualité, Latest-Headlines and Tunisie.me move to a shared engine
-
Esperance-De-Tunis.com
Bilingual Arabic-French version, live scores and notifications
-
XeConvert.com
Rates fixed, 290 currencies, per-pair analysis in 14 languages
-
Videos-to-MP3.com
Site rebuilt from scratch around link conversion
-
HDTutorial.com
New site, same URLs, dead videos removed automatically
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Offres-Travail.com
E-mail alerts rebuilt: one per address, between 8 am and 9 pm
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Offres-Travail.com
Automatic CV parsing and two-click applications
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Pylon-Check.com
PylonCheck launched, the cloud-first version
-
Pylon-Monitor.com
Pylon-Monitor Lite launched, without a screen
-
Offres-Travail.com
New “Le Guichet” visual identity across 183 files
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CategorizeAPI.com
CategorizeAPI launched
-
TrADuck.com
TrADuck rebuilt from scratch, payments in production
-- what I do
Four crafts, one person
Data engineering
ETL/ELT pipelines, large-scale data collection and cleaning, Elasticsearch, data modelling, enterprise reporting.
etl · scraping · big data
Artificial intelligence
LLM integration, RAG, NLP, OCR and machine translation, chosen for real use cases at a controlled cost.
llm · rag · nlp · ocr
Full-stack products
From database schema to interface, including technical SEO, internationalisation and performance.
php · python · js · seo
E-commerce & connected devices
Complete shops (Stripe, PayPal, carriers, invoicing) and hardware designed end to end, firmware included.
stripe · iot · logistics
-- under the hood
Everything runs on my own infrastructure
50+ sites hosted, monitored and backed up on servers I administer myself: fewer dependencies, controlled costs and a hand on every detail.
Servers
Debian, Apache, PHP 8, MySQL, daily backups and monitoring.
Search
Local Elasticsearch on each server for the sites' search engines.
AI
A shared language-model service used by every site, with automatic fallback.
Network & security
Cloudflare, in-house bot filtering, certificates and security headers.
Transactional e-mail through AWS SES, bounces and complaints handled automatically.
Measurement
Google Analytics 4, Search Console, Bing and IndexNow across the whole fleet.
-- tools loaded in memory
Tech stack
- Python
- PHP 8
- JavaScript
- SQL
- MySQL
- PostgreSQL
- Elasticsearch
- Redis
- Databricks
- Spark
- Airflow
- SAS
- Pandas
- PyTorch
- Transformers
- LangChain
- LLM APIs
- OCR
- C++ / firmware
- MQTT
- Home Assistant
- Apache
- Debian
- Docker
- Cloudflare
- AWS
- GCP
- Stripe
- PayPal
- Tailwind
- Technical SEO
- MediaWiki
-- let's start something
A project, an idea, a collaboration?
Tell me what you need: I answer personally, usually within 24 hours.