Systems Administrator & DevOps – Networks and Security (RSE) - Paris - H/F

We are seeking a skilled Linux Systems and Network Engineer to join our dynamic team in Paris. This role offers an exciting opportunity to work with cutting-edge technologies in a collaborative environment. You will be responsible for the design, implementation, and maintenance of Linux-based systems and networks, ensuring optimal performance and security.Ke…

Join Alten as a Linux System Engineer in Paris, where you will be at the forefront of technology, driving innovations in system architecture and operations. This role requires a passion for Linux systems and a desire to work in a collaborative environment.You will be responsible for designing, implementing, and maintaining Linux-based systems to ensure optimal performance and security. Collaborate with cross-functional teams to identify and resolve system issues, implement automation solutions, and enhance overall system efficiency.

Join Safran AI as a Linux Systems Engineer where you will be at the forefront of designing, implementing, and maintaining dynamic Linux systems solutions. You will work with a talented team to ensure robust and scalable environments that support our innovative projects.

Safran.AI, a subsidiary of Safran Electronics & Defense, develops artificial intelligence solutions for analyzing high-resolution satellite imagery, video streams, and acoustic signals. The team’s work supports aerospace, defense, and government clients, and now also addresses Industry 4.0 challenges, such as anomaly detection in critical components using digital imagery. Since 2016, Safran.AI has delivered complex algorithms and software for automatic detection and identification of military-relevant objects, drawing on both commercial and government data sources. The company values innovation, safety, and technical excellence, fostering a collaborative environment where creative ideas are encouraged. The Senior Linux Systems Engineer (F/H) is part of the Customer Solution Services division within the Solution & Service Line department. This position is based in Paris and focuses on the deployment, operation, and ongoing maintenance of Safran.AI’s products for clients throughout the contract lifecycle. What you will do Design, implement, validate, and maintain deployment automation for Safran.AI products. Ensure product instances remain updated and fully operational in client environments. Analyze client information system constraints and propose technical solutions in areas including virtualization, storage, networking, firewalls, and data pipelines. Collaborate with client experts to integrate Safran.AI products into their information systems. Work environment Located in Paris, this role involves working alongside experienced teams dedicated to technological excellence and real-world impact in critical sectors.

Join our cutting-edge team at iliad-free as a Network Core Systems Engineer in Paris. We are looking for a talented and motivated individual to help us design, implement, and optimize our core network systems. As part of our dynamic Réseaux & Telecom department, you will play a crucial role in ensuring the reliability and performance of our network infrastructure.

Join BlaBlaCar as a Senior System and Network EngineerBlaBlaCar, the world's foremost community-driven travel application, connects 27 million members annually for carpooling and bus travel across 21 countries. With a diverse team of 800 professionals from over 50 nationalities, we operate from five global offices, with 30% of our workforce thriving in fully remote roles.Your RoleAs a Senior System and Network Engineer within our IT Operations team, you will be instrumental in delivering robust IT services and solutions throughout our organization, ensuring efficiency and security. Your expertise will help streamline our network and software solutions, empowering our team members to perform at their best. You will work in close collaboration with both the Security and Engineering teams to uphold the integrity, availability, and reliability of our IT infrastructure.Reporting directly to Henry Marinho Faiacida, our IT Operations Manager, you will join a skilled team of six, comprising three IT Engineers and three Tech Support Experts.Key ResponsibilitiesIn this role, you will serve as a vital resource for knowledge, best practices, and the execution of technological innovations. Your main responsibilities will include:• Leading IT projects from inception to completion in collaboration with various engineering teams.• Setting up, administering, and maintaining IT SaaS systems and applications.• Reviewing and optimizing SSO workflows within SaaS platforms to ensure peak performance.• Keeping our infrastructure current by implementing security policies, patches, and necessary updates.• Partnering with the Security team to enforce security policies, permissions, and procedures.• Ensuring compliance across all hardware, including networking equipment, computers, IoT devices, and printers.• Taking responsibility for L2/L3 support troubleshooting within the IT Operations domain.• Communicating effectively with internal departments and stakeholders.Scope of Work:• Overseeing users' technical working environment across various development departments.

Join iliad-free as a Network Performance Engineer in Paris, where your expertise will drive the optimization of our network performance. In this dynamic role, you'll analyze network traffic, troubleshoot issues, and develop solutions to enhance overall performance. Collaborate with cross-functional teams to implement best practices and innovative technologies to ensure our network exceeds customer expectations.

Join our dynamic Ubisoft Infrastructure & Platform team as a Senior Linux Systems Administrator. In this pivotal role, you will be responsible for the design, installation, configuration, monitoring, and maintenance of Linux environments, both on-premises and in the cloud. Your expertise will be crucial in ensuring the stability and reliability of our systems that support business-critical services.Your collaboration with development teams will drive automation and efficient deployment strategies, enhancing our operational capabilities. Embrace the opportunity to grow your skills within a fast-paced, technically challenging environment, while working with modern DevOps and cloud technologies.Key Responsibilities:Administer and maintain Linux servers (preferably Rocky Linux or Red Hat) in virtualized and cloud settings.Enhance automation processes through configuration management tools such as Ansible or Chef.Utilize monitoring tools like Prometheus and Grafana, as well as web servers such as Nginx or Apache.Develop and manage containerized applications using Docker and related technologies.Support and optimize CI/CD pipelines with GitLab CI/CD.Collaborate on cloud infrastructure projects (Azure) employing Terraform.Diagnose and resolve connectivity and performance issues related to firewalls, load balancers, proxies, etc.Drive continuous improvement initiatives to boost system performance and reliability.

Join our dynamic team at iliad-free as a Network Performance Engineer in Paris. In this pivotal role, you will be responsible for optimizing and enhancing the performance of our core network infrastructure. You will work closely with cross-functional teams to ensure the highest standards of network efficiency and reliability.

APSIDE INFRASTRUCTURE is actively seeking a talented and motivated DevOps Systems Engineer to enhance our Linux systems team in a dynamic DevOps environment.Objectives:The primary goal is to strengthen the BUILD systems division by providing expert support in a challenging DevOps context.Technical Context:The team is responsible for the administration and industrialization of a variety of technical platforms. Proficiency in the following environments and technologies is essential:Operating Systems: LINUXVirtualization: VmWareOperating System: RedHatTechnologies: HP ServiceGuard, Docker, Kubernetes, Swarm, HAProxy, PaceMaker, OpenShiftHardware ManagementFirmware Updates: (DELL, HP)Security KnowledgeLDAP ExpertiseOS HardeningFamiliarity with CI/CD Tools: Ansible, Jenkins, Ansible Automation Platform, GitLab, ArtifactoryProgramming Languages: Python, Shell, Ansible, YAMLPatch Management Tool: SatelliteProject Organization:The project aims to bolster the UNX team to meet the increasing demands of our clients. The initiatives will encompass various areas, including infrastructure projects, business needs, obsolescence management, and automation solutions.Mission Objectives:Ensure the operational readiness of Linux environments.Manage complex requests and incidents.Provide technical support to RUN teams.Assist technical teams with business clusters and foundational technologies.Contribute to infrastructure projects: Deployment of OpenShift clusters, system solution implementations, obsolescence management, and administration tool updates.Industrialize and automate administrative tasks.Engage in projects aimed at enhancing the security of Linux environments.Mission Description:The role involves managing and optimizing Linux environments.The requested expertise will focus on:Industrialization and automation of Linux technical processes.Participation in infrastructure project initiatives.Collaborate on cross-functional projects with various IT and business stakeholders.Execute all or parts of technical projects.Install and upgrade servers.Oversee the installation and evolution of hardware components.

Join us and thrive Network Security Engineer H/F CAPFI is a human-sized IT services company guided by genuine technological expertise and a strong culture of innovation. We offer a stimulating work environment, characterized by a variety of assignments and a human-centric approach. Trust, listening, and support are the core values of our Group, benefiting all employees. Our mission? To allow you to experience a collaborative journey that reflects your aspirations, enabling you to choose your professional trajectory, learning pace, and create the conditions necessary for your fulfillment. We believe that the diversity of profiles enriches our expertise; thus, we handle all applications equally, focusing solely on candidates' skills, irrespective of their origin, age, gender identity, disability, or religion. You are the right candidate if: You hold a Master’s degree and have at least 3 years of experience You specialize in IT Security technologies You recognize that IT Security is crucial today You are meticulous, passionate, curious, and persistent You possess a strong proficiency in English Your missions: As a Network Security Engineer, you will join a team of IT Security specialists at our clients' sites, working on topics such as: Internet access management Implementation of remote access solutions (VPN...) Securing perimeter access (Firewall, Proxy, Reverse Proxy, Load balancing, IDS/IPS, DLP, NAC, WAF...) Securing end-user devices (AV, EDR, HIDS, Micro-segmentation...) Mastery and understanding of cryptographic systems Technological watch Implementation of secure architectures Establishing security monitoring Patch management Validation of new solutions through POC Infrastructure migration

Role Overview Akuo Energy is hiring a Network & OT Security Engineer (H/F) in Paris. This position focuses on protecting and strengthening the security of our operational technology infrastructure and network systems. What You Will Do Design, implement, and maintain security measures for network and OT environments Safeguard the integrity, confidentiality, and availability of company data Help protect critical assets from potential threats About Akuo Energy Akuo Energy develops renewable energy projects and supports a sustainable future. The team values proactive security practices to keep systems and information safe.

About UsHarmattan AI is pioneering the development of autonomous and scalable defense systems, serving as a next-generation defense prime. With a recent $200M Series B funding round, valuing the company at $1.4 billion, we are on an exciting trajectory of expansion to enhance our capabilities in delivering mission-critical solutions for allied forces.Driven by our core values of creating technologies that have a tangible impact, striving for excellence, and tackling formidable technical challenges, we thrive in a rigorous environment where accountability and execution are paramount.About the RoleAs we scale, we are seeking a Senior System & Network Administrator to take complete technical ownership of our infrastructure, both on-premises and in the cloud. You will ensure high availability, resilience, and security across all infrastructure layers.Join our small yet skilled IT team where you will engage in a variety of stimulating projects, from enhancing security frameworks to optimizing tooling and collaborating on cross-functional IT initiatives. As the complexity of our infrastructure increases, so will your opportunities for career advancement into lead or architect roles. We are looking for a self-starter who confidently makes decisions and is enthusiastic about contributing beyond their primary responsibilities.This position involves shared on-call duties among the IT team to guarantee the continuity of critical services.Server & Systems AdministrationAdminister and maintain Linux and Windows servers across on-prem and Google Cloud Platform (GCP) environments.Establish and enforce update and patching policies across all systems.Monitor system health, performance, and uptime; proactively address incidents.Manage virtualization environments and storage infrastructure.Backup & Business ContinuityDesign, implement, and routinely test backup and disaster recovery strategies.Ensure data integrity and set recovery time and point objectives (RTO/RPO).Document and uphold business continuity protocols.Network AdministrationConfigure and maintain network equipment including switches, firewalls, and routers.

Join Alten, a leader in technology consulting and engineering, as an ADAS Systems Engineer (H/F) in Paris. You will play a pivotal role in the development of advanced driver-assistance systems, ensuring cutting-edge innovations in automotive safety and performance.

About Gramian Consultancy Gramian Consultancy is a boutique firm specializing in IT professional services and engineering talent solutions. The team brings deep engineering and leadership experience to help organizations build effective, high-performing teams by connecting them with professionals who fit their specific needs. Role Overview: Senior Linux/DevOps Engineer Gramian Consultancy seeks a Senior DevOps Engineer with advanced Linux expertise to support the transformation of complex IT environments. This hybrid position focuses on automation, CI/CD, and cloud migration. The role blends system administration and DevOps, requiring both operational know-how and the ability to design and implement modern engineering practices. Key responsibilities include building and maintaining CI/CD pipelines, automating infrastructure, and supporting cloud migration projects. The position is based in Paris, Île-de-France, France, with hybrid work options and offices in Saint-Cloud, Lille, Nantes, Rennes, and Lyon. This is a permanent contract. What You Will Do Manage and operate Linux-based infrastructure environments Handle application deployments: installation, configuration, and optimization Design and build CI/CD pipelines from scratch Support migration from on-premise systems to cloud platforms Automate infrastructure and processes using DevOps tools and scripting Work with containerization and orchestration tools (Docker, Kubernetes) Provide L2/L3 support and troubleshoot production issues Conduct technical audits and recommend improvements Collaborate with cross-functional teams to deliver scalable, reliable systems Drive continuous improvement and technical evolution Required Qualifications At least 5 years of experience in system administration, focused on Linux Minimum 3 years in a DevOps role Proven track record building CI/CD pipelines from the ground up Hands-on with Terraform, Docker, Kubernetes, Ansible, and CI/CD tools (GitLab CI or Jenkins) Strong scripting or programming skills in Python, Java, or Shell Experience with major cloud platforms (AWS, Azure, or GCP) Background in migrating infrastructure from on-premise to cloud Solid understanding of both development and operations practices Fluency in French (required) Work Model and Application Process Hybrid work model Offices in Saint-Cloud, Lille, Nantes, Rennes, Lyon Permanent contract Interview process: Introductory call followed by three client interviews

Role overview OECD is hiring a Security Systems and Networks Specialist to help safeguard its technology infrastructure. The role centers on implementing and managing security systems across a variety of network environments. The main objective is to protect the safety and integrity of the organization’s information systems. Main responsibilities Implement and manage security systems for different network setups Monitor information systems to ensure their integrity Apply cybersecurity principles and recognized best practices in daily work Support secure communication and data protection by working with network protocols Requirements Solid understanding of cybersecurity concepts Experience working with network protocols Familiarity with established security best practices This position is located in Paris.

Join evoriel as a Network Performance Manager, where you will play a crucial role in optimizing our client relations and enhancing network efficiency. In this dynamic position, you'll leverage your expertise to analyze performance metrics and implement strategies that drive exceptional results.

Join Scaleway as a Hardware Enablement Engineer specializing in Linux and Firmware. In this role, you will work closely with our engineering team to develop and optimize hardware solutions that drive our innovative cloud services. You will have the opportunity to collaborate on exciting projects, pushing the boundaries of what is possible in cloud technology.

Role overview iliad-free is seeking a Senior System Engineer to join the team in Paris. The position centers on designing, implementing, and maintaining complex systems that underpin the company’s digital solutions. This is a senior technical role with a focus on both new architectures and the ongoing evolution of existing infrastructure. What you will do Design system architectures for digital platforms Implement and maintain large-scale infrastructure Drive improvements for existing systems Work closely with technical teams to deliver reliable solutions Location This role is based in Paris.