Achref Mejri
Open to work · La Marsa, Tunisia

Achref Mejri

Software Engineer / Cybersecurity Specialist / President @ Cartanians

I build and secure full-stack web applications and large-scale backend systems — from vulnerability scanners to live multiplayer game infrastructure. Currently leading Cartanians, a Tunisian esports organization.

30+Backend Services Shipped
3+ yrsLive Systems Experience
7Shipped Projects
sentinelscan — zsh — achref@raven
PYTHON·JAVASCRIPT·LUA·PHP·C#·REACT·FLASK·NODE.JS·FIREBASE·MYSQL·IDOR AUDITING· PYTHON·JAVASCRIPT·LUA·PHP·C#·REACT·FLASK·NODE.JS·FIREBASE·MYSQL·IDOR AUDITING·
01 — Profile

Solving real bugs
in real production systems.

I'm a computer science graduate (License, FST Sidi Bouzid — University of Kairouan, 2026) who's spent the last three years maintaining a large Lua-based backend ecosystem for a live multiplayer game server — the kind of environment where bugs show up in production, under real traffic, with no do-overs.

That background shaped how I work: I debug from first principles, harden server-authoritative logic against spoofed clients, and think about security by default rather than as an afterthought. It's the same instinct that led me to build SentinelScan, a web vulnerability scanning platform, as my final-year project.

Outside of code, I'm President of Cartanians, a Tunisian esports organization I co-founded that runs competitive gaming tournaments across Tunisia.

LocationLa Marsa, Tunisia
RoleSoftware Engineer
FocusFull-stack + Security
EducationB.Sc Computer Science
LanguagesAR · FR · EN
Emailmejriachref1070@gmail.com
Phone+216 92 692 742
GitHub@mejriachref04

Languages

PythonJavaScriptLuaPHPC#SQL

Web & Frameworks

ReactFlaskNode.jsExpressREST APIsMySQLFirebase

Security Focus

Vulnerability ScanningIDOR AuditingSecure Login FlowsInput Validation

Tools & Practices

Git / GitHubRoot-Cause AnalysisDebuggingAgile
02 — Experience

Where the work happened.

Dec 2025 — Jun 2026
Full-Stack Software & Security Engineering Intern
Express Logistics Company · Partner: FST Sidi Bouzid
  • Designed and developed SentinelScan, a web vulnerability scanning platform using Python Flask + React.
  • Implemented automated scan orchestration, dynamic results reporting, and a findings management dashboard.
  • Built a risk scoring module (25pt critical / 15pt high / 5pt medium). Defended before academic jury with top marks.
Jan 2023 — Present
Backend & Systems Developer
Raven Development Studio · Distributed Gaming Infrastructure
  • Designed and maintained 30+ backend services (Lua) for a high-traffic live multiplayer environment.
  • Resolved critical client-crash, memory accumulation, and race-condition bugs through systematic root-cause debugging.
  • Patched IDOR-style authorization bypasses and spoofed client-side events, hardening server-authoritative logic.
  • Built a Node.js/Express auth microservice + Discord-webhook logging pipeline, and a 5-market dynamic economy engine.
2026 — Present
President
Cartanians · Tunisian Esports Organization
  • Co-founded and lead Cartanians, organizing competitive gaming tournaments across Tunisia.
  • Built out organizational structure, staff roles, and the org's public/community presence.
03 — Leadership

Building competitive gaming in Tunisia.

Cartanians logo
President · Co-Founder

Cartanians Esports Organization

A Tunisian esports organization creating and running competitive gaming tournaments. I lead the org end to end — structure, staffing, community, and brand.

cartanians.online →
04 — Selected Work

Projects, shipped.

01
2025–26

SentinelScan

Web vulnerability scanning platform with automated scan orchestration and a risk-scored findings dashboard.

FlaskReactSecurity
02
2026

Raven Accessories

E-commerce platform for the Tunisian market — full admin panel, COD checkout, stock/order management, PDF exports.

Vanilla JSFirebase
03
2026

CSGN

Swimming club management system — registration, subscription tracking with expiry alerts, Cloudinary gallery.

ReactNode.jsMySQL
04
2026

TuniJobs

Mobile job-search app with AI-powered smart matching between candidates and employers.

FlutterFirebase
05
2026

NAJJEM AI

Concept and data pipeline for a Tunisian-dialect (Derja) NLP platform — text/voice dataset aggregation.

NLPData Pipeline
06
2023–Present

Raven RolePlay Infrastructure

Large-scale Lua microservices ecosystem — anti-cheat, economy engine, stateful sync, Discord logging pipelines.

LuaSystems
07
2024

Pro Launcher

C# WinForms desktop app with HWID binding, token-based licensing, and secure client-server handshake.

C#WinFormsSecurity
05 — Education & Certifications

Foundations.

Education

License in Computer Science (Bac+3) FST Sidi Bouzid, University of Kairouan — Graduated 2026

Certifications & Leadership

Hashgraph Developer The Hashgraph Association — Jul 2025
Event Organizer & Competitor — Senior Robotics TechFest 1.0, ITA — May 2023
Arabic — Native
French — Fluent
English — Fluent
06 — Contact

Let's build something secure.

Open to full-stack, backend, and security-focused roles — and always open to talk esports.