Network Engineer

3 weeks ago

Singapur, Singapore Ahrefs Full time

Overview

Ahrefs is seeking an experienced Network Engineer to join our team and help manage our large-scale distributed infrastructure. In this role, you will be responsible for the design, implementation, and maintenance of our network infrastructure, ensuring high availability, performance, observability, and security. Our system includes custom OCaml code and third-party technologies such as Debian, ELK, Puppet, Ansible, and other tools as needed. The role involves working with a 100+ petabytes storage cluster, 3,000+ bare-metal servers, and large-scale deployments, along with daily software and hardware challenges.

We do not engage with agencies or third-party recruitment solutions for the roles we hire for. If at any point we need help, we’ll let you know.

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, and 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 on different levels (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
Preferred Qualifications
  • Experience working with bare-metal servers and large-scale distributed systems
  • Knowledge of Linux operating system internals and kernel-level networking
  • Familiarity with monitoring and logging tools (e.g., ELK stack, Prometheus, Grafana)
  • Experience with OCaml or other functional programming languages is a bonus
About Ahrefs

Ahrefs runs an internet-scale bot that crawls the whole web 24/7, storing huge volumes of information to be indexed and structured in a timely fashion. Our backend system is powered by a custom petabyte-scale distributed key-value storage to accommodate all that data coming in at high speed. With this data, Ahrefs builds analytics services for end-users in the SEO space and a web-scale search platform.

We are a lean and robust team who strongly believe that better technology leads to better solutions for real-world problems. Our motto is "first do it, then do it right, then do it better".

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