Senior Systems & Middleware Engineer - Paris Onsite

SEIDOR; Paris; Sur place; EUR 90 000 - 130 000; Plein temps

Résumé du poste

SEIDOR helps organizations transform and stay competitive through technology and innovation, always putting people first. With over 8,000 professionals in 45 countries, we are a diverse and inclusive global team committed to talent, equal opportunities, and sustainable growth.

We want you to join our team in Paris working onsite, as a Senior Systems & Middleware Engineer. In this role, you will maintain Linux and Windows Server environments, ensure the security and performance of platforms, and

Qualifications

• More than 15 years of relevant professional IT experience.
• Extensive hands-on experience in Systems Administration and Middleware Engineering within complex enterprise environments.
• Strong expertise in both Linux and Windows Server administration.
• Strong middleware administration experience with technologies such as IIS, Apache, JBoss, .NET and Java/JRE.
• Solid experience with application servers, reverse proxies, web services, APIs, integration platforms, and batch/scheduling solutions.
• Proven experience managing operating system, middleware, and application upgrades throughout their lifecycle.
• Strong knowledge of patch management, platform maintenance, performance monitoring, and technical troubleshooting.
• Experience supporting virtualized infrastructure environments.
• Experience managing DEV, TEST, UAT and PROD environments.
• Strong ability to perform complex root cause analysis and incident resolution.
• Experience coordinating technical activities with external vendors and multidisciplinary IT teams.
• Bilingual proficiency in English and French, both written and spoken.

Responsabilités

• Maintain, administer, and support enterprise Linux and Windows Server environments.
• Ensure the stability, availability, security, and performance of technical platforms hosting critical business applications.
• Perform advanced troubleshooting and root cause analysis of complex technical incidents.
• Manage operating system patching, upgrades, and lifecycle activities.
• Support virtualized environments and related infrastructure components.
• Administer, maintain, troubleshoot, and upgrade middleware technologies, including IIS, Apache, JBoss, .NET and Java/JRE.
• Provide technical platform support for applications covering collaboration, HR, finance, document management, web, and corporate business services.
• Install and configure new application releases and technically validate vendor-provided upgrades.
• Plan, coordinate, execute, test, and validate OS, middleware, and application upgrades.
• Monitor and optimize platform performance and reliability.
• Manage technical environments across Development, Test, UAT and Production.
• Coordinate maintenance and upgrade activities with software vendors, service providers, infrastructure teams, and business stakeholders.

Connaissances

Systems Administration

Middleware Engineering

Linux

Windows Server

Web services / APIs

Reverse proxies

Batch scheduling

Root cause analysis

Incident resolution

Communication

Bilingual English/French

Outils

IIS

Apache HTTP Server

JBoss

.NET Framework / .NET

Java Runtime Environment (JRE)

Description du poste

SEIDOR helps organizations transform and stay competitive through technology and innovation, always putting people first. With over 8,000 professionals in 45 countries, we are a diverse and inclusive global team committed to talent, equal opportunities, and sustainable growth.

We want you to join our team in Paris working onsite, as a Senior Systems & Middleware Engineer. In this role, you will maintain Linux and Windows Server environments, ensure the security and performance of platforms, and