Network Software Engineer

1 week ago

Hà Nội, Vietnam Zhone Technologies Inc Full time

Description:
**About this opportunity**

Zhone Technologies Inc. is an innovation-driven startup offering an exciting opportunity to be part of a dynamic network software engineering team. As a **Network Software Engineer**, you will contribute to the development of next-generation network products as we transition from legacy protocol stacks to open-source-based systems such as **FRR and SONiC**.

This position focuses on **designing, porting, and validating L2/L3 features**, as well as **developing new capabilities and ensuring protocol interoperability** in embedded environments. You will work closely with senior engineers and report to the Director of Software Development.

**What You’ll Do**
- Contribute to high-level system architecture discussions
- Collaborate with cross-functional teams and technical stakeholders
- Break down tasks and provide development estimates
- Review and document technical requirements and designs
- Write and execute unit tests and assist with system-level validation
- Provide ongoing support for existing products
- Analyze L2/L3 features in ZebOS and map to equivalent FRR/SONiC implementations
- Port, redesign, and implement routing protocols such as BGP, OSPF, IS-IS, RIP
- Develop and integrate new or missing protocol features
- Debug and resolve protocol interoperability and system-level issues

**Requirements**:
**What You Bring**
- Bachelor’s degree in Computer Science, Electrical Engineering, or a related field
- 3+ years of experience in network software development
- Solid understanding of L2/L3routing protocols and their role in modern networks
- Experience with multi-threaded, real-time embedded systems
- Strong programming skills in C/C++
- Familiarity with embedded Linux or other real-time operating systems
- Ability to troubleshoot complex issues in embedded environments
- Good communication skills and a collaborative mindset
- A self-driven attitude and strong desire to learn.

**Assets You May Possess**
- Routing Protocols & Networking Stack
- Experience developing or maintaining L2/L3 protocols (BGP, OSPF, IS-IS, RIP, VRRP)
- Familiarity with protocol internals such as state machines, timers, and convergence logic
- Understanding of Linux networking internals, including Netlink, VRF, routing tables, bridge/VLAN
- Experience working with ZebOS or FRR (ZAPI, vtysh, protocol daemons)
- Exposure to advanced technologies like EVPN or SRv6 is a plus
- Embedded & Platform Development.
- Embedded Linux user-space development experience
- Familiarity with kernel modules, drivers, or HALs
- Understanding of SDKs such as Broadcom SDK or SAI
- Network Virtualization & Overlay Technologies
- Knowledge of VRF, VxLAN, tunneling, and overlay architectures
- Experience configuring virtual routing or sandbox test environments
- Management Protocols & Interfaces.
- Working knowledge of NETCONF, SNMP, TL1, Telnet, SSH
- Exposure to YANG models and integration with EMS/NMS
- Ability to expose or extend telemetry or RPC-based management endpoints
- Testing, Automation & Debugging
- Skilled in using tools such as tcpdump, Wireshark, gdb, valgrind
- Experience writing automation scripts using Python, Bash, or TCL/Expect is beneficial

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