Security Engineer

Project overview

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Secure critical internet access, manage routing, load balancing, and perimeter protection for a major client.

As part of the strategic reinforcement of the Internet Infrastructure teams, we are looking for a Level 3 Network & Security Infrastructure Engineer. Your role will be at the heart of operational continuity and information system resilience: you will bring your Level 3 (N3) technical expertise on network (Cisco, Juniper, A10 Networks) and security (WAF Ubika, Anti-DDoS Radware) infrastructures, while managing the integration of new solutions and ensuring the Operational and Security Maintenance (MCO/MCS) of critical Internet gateways.

Your future environment

You will work within the Internet Infrastructure department, in constant interaction with network architects, cybersecurity experts, the SOC, and IT project managers. In a high-availability environment requiring rigor, proactivity, and reactivity, you will be the N3 referent for complex incidents, application load balancing needs, and perimeter security challenges. You will work in a hybrid setup (with on-site client presence) and will be one of the guarantors of the high performance of the group's communication infrastructures.

Your key missions

N3 Expertise, Incident Resolution & MCO/MCS (RUN & SECURITY Mode):

Projects, Integration & Documentation (BUILD & ARCHITECTURE Mode):

• Ensure Level 3 (N3) technical expertise on all Internet network (routing, switching, load balancing) and security infrastructures.
• Diagnose, escalate, and resolve complex and critical incidents affecting the network or security.
• Conduct in-depth post-incident analyses (post-mortem), identify root causes, and develop continuous improvement plans.
• Supervise and execute preventive and corrective maintenance of critical infrastructure bases.
• Continuously optimize the performance, resilience, and availability of network and application flows.
• Maintain active technological and security watch to anticipate architecture evolutions and vulnerabilities.
• Manage the integration and deployment of new network and security infrastructures (A10 Networks load balancers, WAF Ubika application firewalls, Radware Anti-DDoS protections).
• Write, validate, and maintain reference technical documentation (Technical Architecture Files
• DAT, Operational Files
• DEX, security instructions).
• Support project and operations teams in the operational implementation and handover of solutions.

Requirements

Your assets

Our benefits

5 reasons to join us

Our selection process

Ready to join a team of committed experts? Don't hesitate, join the Storm Team!

Storm Group encourages an inclusive and multicultural culture where diversity of profiles fuels our collective intelligence. By joining the Storm Team, you become part of a committed ecosystem that places the development of your talents at the heart of its strategy, while actively contributing to solidarity and reducing environmental impact, both within our offices and in the large-scale projects we undertake for our clients.

Work environment

Storm Group is a consulting firm specializing in the transformation of Information Systems and Organizations. We support our clients across the entire IT value chain, from expert sourcing to strategic consulting and software engineering.

Our clientele primarily consists of major players in banking, insurance, and finance, for whom we mobilize rigorously selected consultants for their most strategic projects.

• Education: Engineering degree or Master's degree (Bac+5) in IT, Networks & Telecoms, or Cybersecurity.
• Experience: You have solid experience of 5 to 8 years in N3 network & security engineering and expertise on large-scale or operator infrastructures.
• Imperative Network & Security Technical Expertise:
• In-depth mastery of routing and switching: Cisco (IOS-XE, NX-OS) and Juniper (JunOS).
• Excellent mastery of Load Balancing and ADC solutions: A10 Networks (Thunder ADC) (or F5 equivalents).
• Solid skills (or "Plus" skills) on security components: WAF Ubika and Radware Anti-DDoS protection.
• Solid knowledge of Internet network architectures (BGP, OSPF, DNS, NAT, VPN, filtering).
• Skills & Posture:
• Demonstrated ability to write and validate structured technical deliverables (DAT/DEX).
• Proactive security attitude and constant desire to improve processes and architectures.
• Languages: Impeccable French and fluent professional English.
• Interpersonal Skills and Communication: Excellent communication skills to interact clearly with technical stakeholders and project managers.
• Problem-Solving Ability: Reactivity, composure, and rigorous methodology in the face of security emergencies or critical network failures.
• Proactivity and Team Spirit: Constant desire to share knowledge, propose optimizations, and work synergically with the entire squad.
• Public transport pass reimbursement at 75%.
• Meal vouchers subsidized by STORM GROUP at 50% (€10.5/day).
• Gymlib / Wellpass access (sports and well-being).
• Health / Provident Fund plan with Alan.
• Continuous training: Access to Udemy Business and support for certifications (Cisco CCNP/CCIE, Juniper JNCIP, A10 Networks, security certifications).
• Referral bonus, profit-sharing, and participation bonus.
• Work schedule: Hybrid remote work (with days on client site).
• Tailored career path: Co-create a unique professional trajectory adapted to your ambitions.
• Strategic missions: Work on large-scale projects, perfectly aligned with your expertise.
• Dedicated support: Benefit from structured annual reviews to ensure your continuous progress.
• Continuous excellence: Develop your skills daily within a demanding ecosystem.
• Sustainable performance: Grow in an environment where professional demands respect your work-life balance.
• Introductory call with a recruiter.
• Technical interview with in-depth technical assessment (Cisco/Juniper routing architecture case study, load balancing on A10 Thunder ADC, N3 incident analysis on WAF Ubika/Anti-DDoS Radware, and technical writing).
• Final meeting to validate fit and project outlook.

Project details

• Start: ASAP
• Duration: 1 mois
• Remote: hybrid
• Location: 75002, Paris, Île-de-France, FR
• Languages: French