About

Hello there

Hi, I'm Mario

Systems engineer & DevOps with over 25 years of experience, passionate about automation, critical infrastructures, and cross‑functional development.

I love cars (especially powerful ones), bikes (stock), electronics (PCB design), and I regularly dive into new technologies to stay up‑to‑date.

Below you will find all the technologies I master to build applications across multiple platforms and domains.

Stay in touch – I constantly improve my skills and will create new things for all of us.

View my work View my CV
Mario Dantas

Systems & Networks

Windows/Linux, DHCP/DNS, DRBD/OCFS2, Keepalived, VPN, VLAN, Load Balancing.

CI/CD & Monitoring

Jenkins, Artifactory, Autosys, Dynatrace, Geneos, ELK, Grafana, PRTG.

Languages & Frameworks

Shell, Python, PHP (OOP), Java, C#, C++ (Arduino), VB.NET, Gradle.

Databases

MySQL (admin, PDO), Oracle, Sybase, advanced queries, stored procedures.

UI/UX & Frontend

HTML5, CSS3, JavaScript (Vanilla, jQuery), Ajax, responsive design.

Mobile & Embedded

Android (Java, Groovy), Arduino (C++), PCB design (DesignSpark).

Tools & IDEs

NetBeans, PyCharm, Android Studio, VS Code, PHP Storm, Git.

.NET & Simulation

.NET apps for Flight Simulator, Boeing 737 cockpit.

Production Engineer

BNP Paribas CIB – Paris

📈 Achievement: Reduced deployment lead time by 40% through CI/CD pipeline optimization (Jenkins + Artifactory). Automated 15+ manual tasks using Shell/Python, saving 10h/week.

Head of IT Infrastructure

Alizé Trading – Paris

📈 Achievement: Designed and deployed highly available clusters (DRBD/OCFS2) achieving 99.99% uptime. Migrated legacy systems to full-stack automation, cutting infrastructure costs by 25%.

Systems Administrator

Havas Media – Puteaux

📈 Achievement: Accelerated environment provisioning by 50% using GitLab CI/CD for auto‑deployment across dev/qualif/prod stages.

WEB / Frontend Developer

Intrapole – Champcueil

📈 Achievement: Revamped UI/UX leading to 30% increase in user engagement (responsive design, jQuery plugins, WordPress optimization).

PHP / MySQL Developer & Sysadmin

SAS ASSERCAR – Asnières-sur-Seine

📈 Achievement: Migrated and optimized MySQL databases, improving query response time by 60%. Maintained 24/7 availability of Debian servers with zero critical downtime.

Early Career

Zabaion, ClickGraph, Clover Tech., Tecnohipica, Datamatic

📈 Achievement: Built from scratch 5+ e‑commerce websites (Magento/Prestashop) and implemented Windows Server networks supporting up to 200 users.