Network Engineer - Physical Network Infra - London, UK

TikTok; Greater London; On-site; GBP 90,000 - 125,000; Full time

Job summary

TikTok is seeking a Network Engineer to design, build, operate, and optimize its global network across backbone, data centers, and cloud. You will work with cross-functional teams to evolve network architecture and ensure reliable, scalable services for popular apps worldwide.

Preferred candidates will have hands-on experience with main vendor devices (Cisco, Arista, Juniper, H3C, Huawei) and a strong grasp of MPLS, BGP/OSPF, and data-center topology. Expect travel up to 15–30% as needed.

Qualifications

• Knowledge of core network protocols and data center networking concepts.
• Ability to operate and troubleshoot large-scale networks across data centers and cloud.
• Experience with on-call rotations and cross-functional teamwork.

Responsibilities

• Design, build, operate and optimize the global network across backbone and data centers.
• Collaborate with cross-functional teams to evolve network architecture and services.
• Engage with external vendors for device selection, testing and verification.

Skills

TCP/IP protocols

BGP & OSPF/IS-IS

MPLS technologies

Network monitoring

Communication skills

On-call rotation

Education

Bachelor's in CS/Engineering or equivalent

Tools

Cisco

Arista

Juniper

H3C

Huawei

Job description

Responsibilities

The Network Engineering-Physical Network Infra team is part of the global technology structure and brings together innovative ideas and technologies from network architecture, software-defined networking (SDN), network virtualization, switch software and hardware co-design, and high-speed networking, to create hyperscale data-center networking solutions that power several of the most popular apps of the world such as TikTok.

• Design, build, operate and optimize the global network, including backbone, data center, public cloud and Edge/CDN.
• Work with cross-functional teams including but not limited to compute, storage, database, recommendation system, drive the innovation and evolution of the network.
• Work with external vendors and ISPs for device and carrier selection, perform testing and verification.
• Travel may be required up to 15% - 30% of the time.

Minimum Qualifications

• Good understanding of network protocols including TCP/IP, DHCP, BGP, OSPF/IS-IS and MPLS related technologies.
• Good understanding of network monitoring protocols and tools, such as SNMP, Sflow/netflow, Telemetry.
• Familiar with data center network architecture, such as CLOS.
• Hands-on experience of major network devices, such as Cisco, Arista, Juniper, H3C, Huawei and other mainstream vendors.
• Self-motivated, good communication and written skills.
• Team player and participate companies network global on-call rotation.

Preferred Qualifications

• Bachelor's in Computer Science, Information Science, Engineering, Mathematics, or a related field, or experience equivalent to a Bachelor's degree based on three or more years of work experience
• In-depth knowledge of network protocols and implementation in hyper scale data center networks.
• In-depth knowledge of MPLS related Traffic Engineering technologies, such as Segment Routing, RSVP, and LDP etc.
• In-depth knowledge of public cloud architecture, such as AWS, GCP, Azure, Ali Cloud, OCI, etc.
• Familiar with mainstream commercial switch/router chipsets, such as Broadcom, Barefoot etc.
• Good understanding of IPv6 and IPv4-IPv6 co-existence technologies.
• Programming/scripting in Python or other languages.

About TikTok

TikTok is the leading destination for short-form mobile video. At TikTok, our mission is to inspire creativity and bring joy. TikTok's global headquarters are in Los Angeles and Singapore, and we also have offices in New York City, London, Dublin, Paris, Berlin, Dubai, Jakarta, Seoul, and Tokyo.

Why Join Us

Inspiring creativity is at the core of TikTok's mission. Our innovative product is built to help people authentically express themselves, discover and connect – and our global, diverse teams make that possible. Together, we create value for our communities, inspire creativity and bring joy - a mission we work towards every day.

We strive to do great things with great people. We lead with curiosity, humility, and a desire to make impact in a rapidly growing tech company. Every challenge is an opportunity to learn and innovate as one team. We're resilient and embrace challenges as they come. By constantly iterating and fostering an "Always Day 1" mindset, we achieve meaningful breakthroughs for ourselves, our company, and our users. When we create and grow together, the possibilities are limitless. Join us.

Diversity & Inclusion

TikTok is committed to creating an inclusive space where employees are valued for their skills, experiences, and unique perspectives. Our platform connects people from across the globe and so does our workplace. At TikTok, our mission is to inspire creativity and bring joy. To achieve that goal, we are committed to celebrating our diverse voices and to creating an environment that reflects the many communities we reach. We are passionate about this and hope you are too.