Hi, I'm Hajar Benhadj

A full relational database engine built from first principles in Rust: 4 KiB checksummed pages, a B+Tree, a crash-proof write-ahead log (survives 200 randomized kill-points), MVCC snapshot isolation, a hand-written SQL front-end differential-tested against SQLite, and a Postgres-compatible server real psql clients connect to. Compiles to WebAssembly — try it live in the browser.

Paste any public GitHub repo and get a medical report for your codebase: explainable scores for quality, security, docs, testing & maintainability, secret & CVE detection (OSV.dev against your exact lockfile), an architecture graph with cycle detection, and a prioritized prescription — plus head-to-head repo duels with a shareable card.

A digital product: 6 production-ready n8n automations that send invoices, chase late payments on autopilot, and brief your inbox with AI. Free edition open-sourced on GitHub — full kit with setup guide sold on Gumroad.

Paste a CV and a job posting: get an evidence-based keyword match table (found / partial / missing), a match score, and exactly what to add, improve, or remove — with server-side AI, rate-limited and key-safe.

An Arabic-first, installable PWA for learning German: interactive stories, Krimi chapters, dialogues, exams, vocabulary games, and an AI chat tutor — vanilla JavaScript, works offline.

An automated Python-based tool that parses Swagger/OpenAPI documentation and leverages AI to generate robust Pytest test cases to streamline backend testing.

An intelligent computer vision system that tracks skeletal keypoints using MediaPipe to detect human falls in real-time and instantly sends emergency photo alerts via Telegram.