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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior WAN & ISP Engineer - Paris Region - **Company:** Mistral AI - **Location:** Paris, France - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Border Gateway Protocol, Cisco PIX, Wavelength-Division Multiplexing, Data Centers, DDoS Mitigation, Networking Hardware, Virtual Private Networks (VPN), Multi-protocol Systems, Internet Service Provider, Python (Programming Language), Network Security, Uptime, Network Connections, Network Monitoring, Open Shortest Path First (OSPF), Ansible, Prometheus, TCP/IP, Wireshark, Computer Network Operations, Grafana, Firewalls (Computer Science), Data Center Networking, Palo Alto Networks, Fortinet, Firewall Services Module, Open Network Automation Platform - **Published:** June 12, 2026 - **Apply:** https://fr.indeed.com/viewjob?jk=c6e99f710394941d ## About the Role Do you have experience in WAN?, * 7+ years of experience in WAN, ISP connectivity, or external networking. * Deep expertise in BGP, OSPF, MPLS, and TCP/IP (route filtering, path selection, traffic engineering). * Hands-on experience with ISP peering (e.g., AMS-IX, DE-CIX, France-IX) and multi-homing architectures. * Proficiency in firewall management (Palo Alto, Fortinet, Cisco ASA, or similar). * Familiarity with fiber optics, DWDM, and carrier-grade networking hardware. * Experience with network monitoring tools (e.g., Grafana, Prometheus, Wireshark, Smokeping, RIPE RIS). * Knowledge of network automation (Ansible, Python, or similar) is a plus. * Understanding of network security principles (DDoS mitigation, VPNs, access controls)., * Strong problem-solving and analytical skills for troubleshooting complex WAN/ISP issues. * Ability to thrive in a fast-paced, collaborative environment. * Excellent communication and negotiation skills (English required; French is a plus). * Vendor management experience (contracts, SLAs, escalations). ## Description As a Senior WAN & ISP Engineer, you will design, deploy, and optimize Mistral's external network connectivity, ensuring high-performance, reliable, and secure connections between our data centers and the global internet. You will manage ISP relationships, fiber infrastructure, and firewall systems to support Mistral's mission-critical operations. This role is focused on connecting our infrastructure to the world, not internal data center networking., * ISP & Fiber Management: + Negotiate, provision, and maintain ISP contracts, SLAs, and peering agreements (e.g., with Orange, Colt, Equinix). + Design and optimize multi-ISP connectivity for redundancy and performance. + Monitor and troubleshoot fiber circuits, ensuring uptime and scalability. * Firewall & Security: + Configure, manage, and audit enterprise firewalls (e.g., Palo Alto, Fortinet, Cisco ASA). + Implement security policies, access controls, and threat mitigation for external-facing networks. + Collaborate with security teams to align firewall rules with organizational policies. * WAN Architecture & Optimization: + Design and maintain BGP routing policies, traffic engineering, and failover mechanisms. + Optimize latency, bandwidth, and reliability for global connectivity. + Monitor WAN performance metrics (e.g., packet loss, jitter, throughput) and proactively resolve issues. * Vendor & Stakeholder Collaboration: + Build and maintain relationships with ISPs, fiber providers, and hardware vendors. + Coordinate with internal teams (e.g., infrastructure, security) to align WAN strategies with business needs. + Represent Mistral in peering forums, IX communities, and vendor discussions. * Documentation & Knowledge Sharing: + Maintain up-to-date documentation for WAN architectures, firewall configurations, and ISP agreements. + Develop runbooks and playbooks for common network operations and incident response. + Mentor junior team members on WAN/ISP best practices. ## Related Videos - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Dev & Test in the Cloud? 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