I'm Oussama Rahmouni, a senior crawling and anti-bot engineer.
RahmouniDev is my studio, registered in the US as RahmouniDev LLC. It runs as a factory: every product is designed to own its own complexity and operate without babysitting. APEX crawls without manual intervention. Al Bayrouni publishes on its own pipeline. The output changes; the operating standard doesn't.
For clients, the factory builds custom extraction for targets engineered to refuse it: sites behind enterprise WAFs, mobile apps with undocumented APIs, pipelines that have to stay up rather than work once. If a normal team can't get the data, that's the work I take.
Working on something that needs this kind of engineering? Let's talk.Direct engineering with the person who builds it. No middlemen, no handoffs.
Technical_Specialization
Engineering Depth.
Backend_Platform
- Node.js & TypeScript
- NestJS & Event-Driven Architecture
- WebSockets & Real-Time APIs
- REST, GraphQL & Custom Protocols
- PostgreSQL, Redis & MongoDB
Data_Intelligence
- Large-Scale Web Extraction
- TLS Fingerprint Shaping: JA3/JA4, uTLS, curl-impersonate
- Behavioral Anti-Detection Engines
- CAPTCHA Solving & Token Banking
- Multi-Market Data Pipelines
- Mobile API Reverse Engineering
Cloud_&_Infrastructure
- AWS
- Docker & Containerized Services
- Git, GitHub & GitLab CI/CD
- Linux Server Administration
- Nginx & Process Management
Security_&_Systems
- Proxy Networks & Rotation Systems
- Protocol Engineering (MTProto, WA)
- Frida & Dynamic App Instrumentation
- WAF Bypass & TLS Probing
Engineering_Philosophy
How I Build.
Systems should own their own complexity
Real expertise is knowing which layer a problem belongs to: network, protocol, application, or data
Anti-patterns in the wild are a roadmap. Once you can break a system, you understand how to build its replacement
Technical_Projects
Building Systems.
APEX: Crawl Infrastructure Platform
Crawl platform built on anti-detection primitives, TLS fingerprint shaping, identity & session trust, a browser-solver token bank, and a self-managed residential proxy mesh. Its live vertical is food-delivery intelligence: a reverse-engineered mobile API tracking thousands of venues daily. New verticals are configuration, not new engineering.
The Public Toolbox
Six tools from the APEX component layer: whichwaf (anti-bot detection), ja3lab (TLS fingerprints), impersonate (browser-perfect HTTP), tokenbank (challenge solver bank), app2api (mobile API extraction), driftwatch (defense-change monitoring). Open source on GitHub.
Al Bayrouni: Technical Content Platform
Long-form technical writing from first-hand implementation. Crawl architecture, anti-detection systems, security engineering. The technical record of work in progress.
Consulting: Crawl & Data Infrastructure
Selective client engagements: anti-bot architecture, data pipeline design, Node.js/TypeScript systems.