Principal Software Engineer - SDN/LB (Remote avail...

Principal Software Engineer - SDN/LB (Remote available)

What you'll do at

This is a senior level position on the Torbit team, which is building a next generation software load balancing (SLB) and global server load balancing (GSLB) solution for Walmart’s private OpenStack and public cloud platforms. The Torbit team is always looking to push the limits of technology and looking to build cutting edge software defined networking (SDN) and network functions virtualization solutions for Walmart’s cloud platforms.

The core focus of this position is to develop and implement new innovative software solutions, which scale significantly with business demand and enhance Walmart’s cloud platforms. The goal for this role is to architect, build, and maintain SDN and load balancing solutions across private and public cloud services, with responsibilities including:
1. Work directly on the Torbit team to develop end-to-end software solutions to move away from physical appliances
2. Innovate, develop, and build hybrid cloud service mesh solutions utilizing SDN and load balancing capabilities for optimized application delivery
3. Come up with innovative ideas to improve performance, scalability, reliability, and uptime
4. Deliver highly scalable and reliable production ready code
5. Design, develop, and operate code across multiple production systems
6. Evaluate and implement SDN and NFV solutions
7. Use agile methodologies for rapid software development
8. Leverage and implement CI/CD pipelines for software delivery

*Depending on candidate, position can also be based in Washington DC/Reston or remote*

Minimum Qualifications

1. At least 6 years of software development experience
2. Proficient in C, C++, Python or Go (Golang) programming languages
3. In depth knowledge of load balancing, networking, DNS, TCP/IP, and UDP
4. Deployment and operational expertise in Linux, such as RedHat / Ubuntu
5. Experience and knowledge with cloud platforms (OpenStack / public cloud)
6. Familiarity and experience working with large scale infrastructures, and being able to explain reasons for specific design decisions
7. Development experience in writing networking or load balancing software
8. Strong analytical and problem solving skills
9. Willingness to support code in production and be a point of escalation to resolve issues

Preferred Qualifications

1. Strong presentation and communication skills, including giving product/code demonstrations
2. Recent and relevant experience with OpenStack, such as Nova, Neutron, Cinder, Glance, Swift, Heat, Ironic, and Octavia
3. Experience with Kubernetes and containers
4. Experience in numerous programming languages
5. Knowledge or experience in content delivery networks (CDN)
6. Experience with routing protocols and projects, such as Quagga, GoBGP, ExaBGP, or BIRD
7. Familiarity with SDN projects, such as Project Calico, Open Daylight, Contrail, Nuage VSP, VMware NSX,, and Open Virtual Network (OVN)
8. Experience with service mesh technologies, such as Linkerd, Envoy, Istio, and Cilium
9. History and experience contributing to open source projects is a huge plus


The Walmart US eCommerce team is rapidly innovating to evolve and define the future state of shopping. As the world’s largest retailer, we are on a mission to help people save money and live better. With the help of some of the brightest minds in merchandising, marketing, supply chain, talent and more, we are reimaging the intersection of digital and physical shopping to help achieve that mission.

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All the benefits you need for you and your family

  • Multiple health plan options
  • Vision & dental plans for you & dependents
  • Associate discounts in-store and online
  • Financial benefits including 401(k), stock purchase plans and more
  • Education assistance for Associate and dependents

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