Network Engineer at Ahrefs

Ahrefs is looking for a Network Engineer to manage its large-scale distributed infrastructure in Singapore. The candidate will be responsible for designing, implementing, and maintaining the network infrastructure, ensuring high availability, performance, observability, and security. The role involves working with a large-scale distributed system powered by custom OCaml code and third-party technologies like Debian, ELK, Puppet, and Ansible. They will be responsible for dealing with a 100+ petabyte storage cluster, 3,000+ bare-metal servers, and various software and hardware challenges.

Responsibilities:

• Design, implement, document, and maintain a robust and scalable network infrastructure to support Ahrefs' distributed crawler and web services.
• Configure and manage network devices such as routers, switches, load balancers, as well as Linux servers.
• Improve and monitor network observability and performance, troubleshoot issues related to network connectivity, latency, and throughput for network devices and servers.
• Implement network security measures, including firewalls, VPNs, and access control lists.
• Collaborate closely with the infrastructure team to ensure seamless integration between network and server infrastructure.
• Participate in the on-call rotation to provide 24/7 support and incident response.
• Automate network management tasks and develop scripts to improve efficiency.

Requirements:

• Deep understanding of network protocols (TCP/IP, BGP, OSPF, etc.) and network architectures.
• Extensive experience with network devices and network operating systems from major vendors (e.g., Cisco, Juniper, NVIDIA).
• Strong knowledge of network security principles and best practices.
• Proficiency in network automation tools (e.g., Ansible, Puppet, Python, Bash scripting).
• Experience with virtualization technologies (e.g., VLANs, VXLANs, GRE tunnels).
• Familiarity with cloud networking concepts and services (e.g., AWS VPC, Azure Virtual Network).
• Strong troubleshooting and problem-solving skills.
• Excellent communication and documentation skills.
• Bachelor's degree in Computer Science, Information Technology, or a related field.

Ahrefs offers:

• Opportunity to work on a large-scale distributed infrastructure.