Staff Software Engineer_BNG/BRAS/cgnat

5 months ago

Nanjing, China Calix Full time
Calix provides the cloud, software platforms, systems and services required for communications service providers to simplify their businesses, excite their subscribers and grow their value.
You will be part of a flexible team that builds AXOS Intelligent Access Edge solution. We commit to code quality, open discussion, and productivity.

Overview:

  • Review market requirements and clarify use cases for next generation AXOS L3/BNG products
  • Design and develop features for AXOS SSM (subscriber management module), such as DHCP server/relay, subscriber management, AAA, AGF, etc., including coding, unit-test, code review, functional test, auto-test case scripts.
  • Investigate industry new technologies (FMC, SDN, network slicing, AI, Big data etc.), design and contribute to Calix end-to-end intelligent network solution (cloud -> network device).
  • Read relevant industry standards, architect, and lead the technical evolution of NaaS for Calix products.
  • Collaborate with Customer Support team to resolve customer issues.
  • Continuously improve AXOS L3/BNG stability & scalability to help ramp ASM products in the fields.

Responsibilities:

In this highly challenging role, you will:

  • Write functional and design specifications.
  • Write software with a good quality.
  • Provide technical leadership to keep Calix L3/BNG products aligning with industry standards and improve system performance, stability, and scalability.
  • Build Calix-innovated distributed data-driven routing platform based on advanced centralized database.
  • Effectively communicate your designs, ideas, and feedback to cross functional teams on technical matters.
  • Write automation test cases, and perform thorough unit test, functional test, and integration test
  • Conduct peer code reviews.
  • Mentor and guide junior team members.

Qualifications:

  • BSCS (or equivalent) required, MSCS preferred.
  • 10+ years of C/C++ experience in Linux embedded development preferably with telecom or datacom industry.  
  • Solid knowledge in BNG, Routing protocols and access network solution.
  • Hands-on experience with subscriber-access technologies (DHCP, PPPoE, etc.) is highly desired.
  • Hands-on experience with BNG end subscriber management, Lawful intercept (LI) and related telemetry is highly desired.
  • Hands-on experience with subscriber AAA (authentication, authorization, accounting) is highly desired.
  • Knowledge and experience in FMC (fixed mobile convergence) is a big plus.
  • Proficient in multi-thread/multi-process architecture, design, and coding
  • Strong in TCP/IP and Network Programming.
  • Be adept at communicating and collaborating with x-functional/boundary teams.
  • Strong background in designing and developing event-based / pub-sub workflow solutions.
  • Strong sense of ownership, be driven to continuously improve tools, methodology and process.
  • Excellent English communication skills
  • Excellent skills in problem analysis and troubleshooting.

Nice to Have:

  • Experience on cgnat, ALG, NAT44, etc.
  • Experiences of DPDK
  • Experiences of NaaS, SDN, VNF (virtual network function)
  • Experiences of dataplane software and knowledge of NP/switch SOC
  • Experiences of Network element management such as Yang model, alarms/events and status collection.
  • Experiences of Microsoft Azure SONiC or Arista EOS.

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