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# Network Simulation Engineer - Expert

- **Company:** Mercor
- **Location:** Berlin, Germany (Remote available)
- **Experience:** Expert
- **Salary:** €145,600 - €187,200
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Automation of Tests, Bash Shell, Border Gateway Protocol, Network Congestion, Data Centers, Dynamic Host Configuration Protocol, Software Debugging, Network Address Translation, Domain Name System (DNS), Network Topologies, IPv4, IPv6, Virtual Private Networks (VPN), Python (Programming Language), Routing, Network Service, Open Shortest Path First (OSPF), Ansible, Tcpdump, Wireshark, Virtual Local Area Networks, Network Simulation, Firewalls (Computer Science), Low Latency
- **Published:** November 8, 2026
- **Apply:** https://www.adzuna.de/details/5957052735

## About the Role

Must-Have

 * 5+ years of professional network engineering experience with enterprise, data-center, cloud, or service-provider networks.
 * Strong hands-on routing, switching, troubleshooting, and network-policy skills.
 * Experience building network labs, simulations, or emulations and analyzing traffic with tools such as Wireshark, tcpdump, or iperf.
 * Ability to write and debug Python, shell, Ansible, or comparable automation.
 * Sound judgment about protocol behavior, failure modes, and measurement limitations.

Preferred

 * Relevant certifications such as CCNP, CCIE, or JNCIP.
 * Experience with network test automation.

## Description

* Design realistic tasks involving routing, switching, network services, segmentation, access policies, redundancy, or performance.
 * Build reproducible network topologies and device configurations using tools such as containerlab, GNS3, EVE-NG, Mininet, ns-3, or FRRouting.
 * Configure and debug scenarios involving technologies like BGP, OSPF, VLANs, IPv4/IPv6, DNS, DHCP, NAT, VPNs, or firewalls.
 * Develop automated checks for reachability, route selection, policy enforcement, isolation, convergence, failover, latency, throughput, and packet loss.
 * Produce reference configurations, traffic or failure scenarios, and verification scripts; validate both successful and deliberately incorrect cases.
 * Review AI-generated configurations and diagnose failures. Use coding agents to support automation while independently validating network behavior.