Senior Network Engineer

Job description

Join DayOne – Shaping the Future of Data Infrastructure DayOne is a global leader in the development and operation of high-performance data centers. As one of the fastest-growing companies in the industry, we’ve built a robust presence across Asia and Europe — and we’re just getting started. As we expand into new international markets, we’re looking for talented, driven individuals to join us on this exciting journey. This is more than a job — it’s an opportunity to be a key contributor to our dynamic team and help shape the future of global data infrastructure. If you're passionate about innovation, technology, and growth, we invite you to be part of DayOne’s next chapter. Key Responsibilities Identify gaps and deficiencies in the current network architecture and operations, propose improvement plans, and drive implementation Troubleshoot and resolve complex network issues, including RCA (Root Cause Analysis), performance tuning, and incident management Manage network infrastructure including routers, switches, firewalls, and wireless systems (configuration, maintenance, and security hardening) Design, implement, and maintain data center and workplace network environments Monitor network performance, identify bottlenecks and SPOF, and continuously optimize network quality and reliability Establish and maintain network operation standards, documentation, and operational processes Collaborate with cross-functional teams to ensure smooth project delivery and adherence to IT governance standards Develop and maintain automation scripts, configuration templates, and backup strategies Manage network monitoring, alerting, and reporting using tools such as Zabbix, Grafana, and ELK Support capacity planning, scalability, and lifecycle management (Day 0, Day 1, Day 2 operations) Ensure network security compliance and safe transmission of internal data Qualifications & Experience Minimum 5 years of experience in network engineering, implementation, and operations Strong hands-on experience in enterprise and/or data center network environments Experience in global enterprise, large-scale environments, or consulting firms (e.g., Big4) is an advantage Proven ability to troubleshoot complex network issues and deliver end-to-end solutions Experience in network design, planning, and project implementation is preferred Technical Skills Network & Protocols Strong knowledge of IP routing and switching (OSPF, BGP, MPLS VPN) Experience with SD-WAN technologies (e.g., Velo SD-WAN) Solid understanding of LAN/WAN architectures Devices & Platforms Hands-on experience with Cisco, H3C, Aruba, and other mainstream vendors Familiar with routers, switches, firewalls, and wireless solutions Security Experience with Fortinet firewalls, WAF, NAC (ISE/FAC), and network security controls Understanding of network security best practices and monitoring Tools & Automation Experience with monitoring tools (Zabbix, Grafana, ELK) Familiar with IPAM, configuration backup, and automation/orchestration tools Certifications (Preferred) CCNA / CCNP or equivalent practical experience DayOne is proud to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. If you're ready to grow with one of the fastest-moving companies in the data center industry, apply now and be part of our global journey.