jamal@site:~$
I build systems that prove what they claim - from server infrastructure and CI/CD pipelines to cryptographic identity verification and business solution systems.
For seven years I worked inside e-commerce operations - products, orders, customer support, the admin panel at 2 a.m. when an order won't go through. For the last stretch of those years I was also building the systems on the other side of that screen. I never had to imagine the operator. I was the operator.
Today that means owning systems end to end: bare metal, schema, application code, security and CI/CD. Ewasila is a seven-service commerce platform with its customer app in the Play Store. Sway is a Rust point-of-sale backend holding a live retailer's inventory, and Fragrancia Luxo runs on it in Brazil - including the electronic fiscal invoicing Brazilian law requires, built from Beirut, in Portuguese. On most of this I was the one engineer who could answer for the whole stack.
I'd rather state a limit than a promise. The licensing system's own documentation grades every layer for what it actually is - a mathematical guarantee, a server-side guarantee, or merely a deterrent - because nothing running on hardware a customer controls can honestly be called uncrackable. I plan the rollback before the rollout, and I build so the running system never depends on the rewrite finishing.
Which is why the next section exists. The check below isn't a badge - it's a live ECDSA P-256 verification against a key your browser never receives. Everything else on this page is a claim. That one you can test.
No trust required.
Just math.
Press run. The server fetches the authorized public key, hashes the canonical payload and checks a real ECDSA P-256 signature - live, right now. Nothing here is pre-recorded.
Systems that aren't on public GitHub - private source, client deployments, and one I designed but did not build. Click a project to open it.
ALSO BUILT
These aren't side projects. mtls and ServiceMassMail were pulled out of Ewasila's production email service and released standalone; mtls-rs is the Rust port. What's public is the part that generalises.
4 public · 11 private github.com/Crellsin ↗
QA & CONTRIBUTIONS
Not my repositories - contributed testing and feature input, not code.
Click a role to expand
Private coding lessons to university students in Computer Science, Software Engineering and IT. Teaching Python, Rust, SQL and software development fundamentals - adapting methods to each student, from data structures and algorithms to exam preparation and applied concepts.
Independently designed and managed the full technical stack - server infrastructure, database administration, application development, security enforcement, CI/CD pipelines and team enablement. Defined architecture blueprints, hired and mentored engineers, managed budgets, enforced security policies and oversaw disaster recovery planning.
Product management, customer support and order management for a Brazilian e-commerce operation. Remote, multilingual environment.
Product management, customer support and order management. Remote - Brazil.
Product, support and order management for a long-term remote engagement based in Brazil.
Web management, email systems, social media, financial operations and database administration for a startup venture.
Hardware and software troubleshooting, computer assembly and disassembly, and networking issue resolution across Beirut.
CERTIFICATIONS
SECURITY
ARCHITECTURE & SYSTEMS
PROGRAMMING
COGNITIVE SCIENCE
BUSINESS & LEADERSHIP
Get in touch
Open to technical leadership, backend and infrastructure work - remote or Beirut-based.
jamalnader@jamalnader.com ↗Languages: English (Advanced) · Portuguese (Advanced) · Arabic (Intermediate) · Spanish (Basic)