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Malt Strategy
William A.WA

William A.

Hosting & Security

€600/day
Paris, FR
8-15 years
System administration
System engineering
Network administration
Optimizely
Performance Optimization

Average response time: 1 hour

About William

Fast intervention for Linux server incidents.


Available and responsive, I step in within 1 hour for critical situations: server down, security breach, data loss, performance degradation.

With over 20 years as a systems and network administrator, I make your Linux servers faster, more stable, and more secure — whether it’s a dedicated server, VPS, web hosting platform, or a business application.

96 projects completed on Malt with a 5/5 rating.


🌐Web Hosting & Websites

  • Slow or unreachable website: diagnostics, Apache/Nginx optimization, caching, compression, CDN
  • WordPress, CMS, e-commerce hosting: optimized LAMP/LEMP stack, server updates
  • Control panels: Plesk, ISPConfig — installation, migration, troubleshooting
  • Hosting migration: zero-downtime transfer, DNS, SSL


🖥️Servers & Infrastructure

  • Dedicated servers & VPS: installation, hardening, optimization for Debian/Ubuntu
  • Virtualization: Proxmox VE, high-availability clusters, VMware migration
  • Networking: VLANs, load balancing, HAProxy reverse proxy, high-availability architecture
  • Automation: Ansible, Docker, Bash/Python scripting


🗄️Databases

  • MySQL / MariaDB: performance tuning, slow query analysis, memory optimization
  • Replication, automated backups, disaster recovery plans
  • Storage: ZFS, RAID, encrypted backup solutions


🔒Security & Protection

  • Firewalls (PfSense), VPN (OpenVPN/WireGuard), system hardening, fail2ban
  • Security audits, vulnerability remediation, compliance
  • Monitoring: Grafana, Prometheus, real-time alerting


🛡️Managed Services & Long-Term Support

  • Proactive maintenance: 24/7 monitoring, updates, incident prevention
  • Fast technical support and clear documentation
  • Long-term support for SMEs and startups



Need an urgent intervention or ongoing support?

Contact me — I reply within 1 hour.
E-commerce
Publishing
Software Publishing
Digital Business Models

  • French

    Native or bilingual

Can work on-site
Paris (up to 50km)

Experience

  • D4.FR
    Linux Systems Expert | Hosting
    January 2017 - Today (9 years and 5 months)
    Île-de-France, France
    D4.FR supports companies in building professional Linux-based hosting infrastructures, with a strong commitment to open-source technologies and operational cybersecurity.

    🎯Our mission:

    • Deliver robust, secure, and scalable web hosting powered by open-source technologies (Debian, Proxmox, Apache/Nginx, Docker…)
    • Manage, audit, and secure dedicated servers, VPS, and private clouds for SMEs, digital agencies, and tech companies
    • Apply best practices in system hardening, monitoring, and data protection (GDPR compliance, ANSSI recommendations)

    🔒Key competencies delivered:

    • Architecture and deployment of secure web platforms
    • Advanced Linux administration (Debian, Ubuntu, CentOS)
    • Access security (VPN, SSH, firewalls, strong authentication)
    • System updates and monitoring (Monit, Prometheus, Zabbix)
    • Security audits, compliance testing, remediation plans
    • Encrypted backups, disaster recovery (DRP/BCP), network segmentation
    • Continuous integration and automation (Ansible, Bash scripting)

    🛠️Thanks to continuous technological monitoring, we constantly evolve our services to meet new challenges in performance, resilience, and digital sovereignty.
    hardening Linux ANSSI RGPD Debian Docker
  • Anotherlight
    Fondateur et Chief Executive Officer
    January 2000 - January 2008 (8 years)
    Issy-les-Moulineaux, France
    NOTHERLIGHT, Issy-les-Moulineaux — Internet Hosting

    Technical Manager – Co-founder (Permanent contract – 8 years)
    Linux Server Administrator (Hosting / VoIP-SIP / Security)

    Missions:
    Design and management of server and network architectures for B2C/B2B production environments, including shared, dedicated, and virtual hosting platforms.
    Implementation of load-balancing solutions for HTTP servers on dedicated and shared infrastructures, as well as high-traffic mail platforms.
    Technical operations in datacenters using technologies such as Xen, Oracle VirtualBox, BIND, Postfix, Qmail, PureFTP, Dirvish, Nginx, Nagios, SpamAssassin.
    Setup of customer support processes.
    Development (LAMP PHP/MySQL, JavaScript, XML) of server automation tools and a custom web-based “Control Panel” for clients.

    Management:
    Supervision of a 4-person team (support technicians and web developer).
    hardening Linux Nginx MySQL

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Education

  • BAC
    Albert de Mun
    1998
    Bac STT informatique de gestion

Skill set

Linux

Categories