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Senior Full-Stack Developer · Aouina, Tunis

Khaled
Ben Abderrahmen

Co-Founder & CTO · Dar Dev

Shipping production SaaS from empty repo to live users: Next.js, NestJS, Python, Flutter, Docker. 5+ years owning architecture, DevOps, and delivery, including Hesabi, a multi-tenant ERP for Tunisian businesses.

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Stack

Tech Stack

Backend & Systems

NestJS Python Django REST Flask FastAPI Express.js Docker Nginx PostgreSQL Prisma Redis MongoDB GitHub Actions Kong Go Kubernetes Terraform Kafka AWS Cloudflare Workers Prometheus Grafana Sentry

Frontend & Mobile

Flutter Dart React 19 Next.js 16 TypeScript Vite Tailwind PWA RTL / i18n Zustand

AI & Security

Multi-LLM orchestration OCR / document extraction JWT / RBAC mTLS XDR agents

Languages

English (Fluent) French (Professional) Arabic (Native)

Experience

Experience

FEB 2023 NOW

Co-Founder & CTO @ Dar Dev

Co-founded the company and lead all technical direction: architecture, stack decisions, delivery standards, and code review. Architected and shipped Hesabi (hesabi.tn), a production multi-tenant ERP covering invoicing, POS, stock, purchasing, payroll, and accounting. Built the internal developer platform: containerized environments, CI/CD, and observability, plus Flutter apps (Legalease, Medify, Cleanch), RTL-first i18n, and Linux/Nginx production ops.

SEP 2024 NOW

Freelance Full-Stack Developer · Ifarming

Built a Flutter agricultural advisory app end to end, through App Store deployment. Real-time crop and weather dashboards, a sensor-driven push-notification pipeline, climate APIs behind a caching layer for poor connections, and analytics to measure impact on farmer productivity and revenue.

JUL 2021 NOW

Freelance Full-Stack Developer · Minduos

Architected modular Python microservices with Docker Compose. GitHub Actions CI/CD for test, lint, and deploy. Linux/Nginx production servers with SSL and health monitoring, log aggregation, 99.5%+ uptime, and coding standards adopted across the team.

Education

Education & Certifications

Holberton School, Tunis

Software Engineering Program (Full-Stack), 2020 - 2022

Holberton: Full Stack Software Engineering Anthropic: AI Fluency: Framework & Foundations Anthropic: Model Context Protocol Anthropic: MCP Advanced Topics Claude on Google Cloud Claude with Amazon Bedrock

Live

Live Projects

Hesabi

LIVE

Production multi-tenant ERP for Tunisian businesses and accounting firms: invoicing, stock, POS, purchasing, payroll, and accounting. Accountant portal, installable PWA with push notifications, native Arabic/French/English RTL, TTN El Fatoora / TEJ compliance, and a packaged desktop client. Plus the services around it: an AI assistant, AI document import, an operations agent and the mail platform.

Next.js 16 TypeScript PostgreSQL 16 Prisma Docker PWA
hesabi.tn

Work

Projects

TunisiaEdu

Multi-tenant school SaaS for collèges, lycées, and vocational centres: timetables, grades, attendance, finance, white-label.

Next.jsNestJSPostgreSQL

Veritas

On-premise AML platform: 15-service architecture behind Kong: real-time monitoring, sanctions screening, rules engine.

PythonKongMicroservices

Falleh

Agricultural auction marketplace with live bidding, escrow wallets, KYC, and bilingual Arabic/French clients.

NestJSNext.jsSocket.IO

kh.ai

Multi-LLM CLI routing Claude, Gemini, Codex, Ollama, and Mistral: pipelines, agent comparison, persistent memory.

TypeScriptBunLLM
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Building something?
Let's talk.

Open to freelance projects, consulting, and full-time opportunities.

khaled@khaledxab.com khaled.benabderrahmen.it@gmail.com +216 54 166 821 LinkedIn GitHub Medium
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