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Principal Site Reliability Engineer

Walmart


Location:
SUNNYVALE, CA
Date:
05/26/2017
Job Code:
864785
Walmart
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Job Details

JobId: 864785
JobTitle: Principal Site Reliability Engineer
City: SUNNYVALE
State: CA
Description:

Position Summary

As a member of the Global Technical Operations (GTO) SRE team you will work with other SRE and DevOps practitioners to produce mission-critical infrastructure, tools, and processes that will ensure highest levels of availability and reliability of all our websites. As a senior member of the team you will be expected to work with management, peers, and customers to define and implement the technical vision of the team.

You're right for the job if you're comfortable with deep technical Linux, networking topics, and distributed architectures. You will work cross-functionally amongst a variety of teams and be a core contributor in every significant engineering service or solution that we deliver to our stakeholders. You'll excel if you have enthusiasm for digging deep, and a flare for sharp technical communication, prioritization and organization. You will work directly with our Software Engineering teams to build our next generation “always up” cloud based e-commerce platform.

Site Reliability Engineers are hybrid systems and software engineers who are responsible and take ownership for reliability, scalability, automation, and other issues related to uptime and availability of Walmart’s e-commerce platform. Our goal is to build, scale and guard the systems that delights the customers.


Position Description


  • Design, write and build tools to improve the reliability, latency, availability and scalability of Walmart e-commerce products.
    o Engender reliability and availability starting with metrics and measurements
    o Enable scaling by providing tools, developing training and/or augmenting processes
    o Build tools/automate to prevent re-occurrence of problem to mission critical products/services.


  • Augment existing instrumentation to build a cohesive picture of the characteristics of our systems with special attention to points of failure.


  • Participate in capacity planning, demand forecasting, software performance analysis and system tuning.


  • Develop a deep understanding of the various services and applications that come together to deliver Walmart e-commerce products


  • Design new tools to monitor and smart alerts that help discover failures/issues in a timely fashion and work with engineers to identify root cause and fix issues


  • Influence, design and create new architectures, standards and methods for large-scale enterprise systems.


  • Root-cause analysis complex problems involving multiple parties, networks, hardware and software that relate to scaling and performance


  • Participate in on-call rotation.


  • Secure the system from issues, be they real, perceived or notional


  • High focus on collecting and inferring metrics


  • Experience with configuration management tools such as Ansible, Saltstack, Chef and Puppet


  • Build and drive the automation systems that maintain system health


  • Eliminate Single Point of failure and test disaster recovery and HA regularly.

    LI-JB1


Minimum Qualifications


  • 12+ years in a software development, DevOps role, or SRE role.


  • Experience in designing, investigating, analyzing and troubleshooting large-scale enterprise systems.


  • Methodical and systematic problem solving approach, combined with a solid awareness of ownership, initiative and drive.


  • Fluency with running services at scale; In depth understanding of Unix systems internals and networking.


  • Networking knowledge and in depth understanding of network concepts, such as different protocols (TCP/IP, UDP, ICMP, etc.), MAC addresses, IP packets, DNS, OSI layers, and load balancing).


  • Understanding of Unix/Linux systems from kernel to shell and beyond, taking in system libraries, file systems, and client-server protocols along the way. Experience administering Linux systems in a production environment


  • Programming experience in one or more of the following languages: Go, Java, Python, Ruby, Shell


  • Bachelor's Degree in Computer Science or a related field, or relevant work experience


  • Experience with distributed version control like Git or similar


  • Experience with IaaS and PaaS providers such as AWS, AZURE OpenStack


  • Experience with enterprise monitoring solutions like AppDynamics, New Relic, Prometheus, Graphite, Nagios, Sensu and Splunk


  • Familiarity with continuous integration/deployment processes and tools such as Jenkins, Maven, Nexus, etc.,


Company Summary

Walmart Global eCommerce is comprised of Walmart.com, VUDU, SamsClub.com, and our technical powerhouse @WalmartLabs. Here, innovators incubate next gen e-commerce solutions in real-time. We integrate online, physical, and mobile shopping experiences for billions of customers around the globe. How do we do it? We continuously build and invest in new technology including open source tools and big data innovations. Data scientists, front and back-end engineers, product managers, and web and UX/UI teams collaborate alongside e-commerce experts to envision, prototype, and bring revolutionary ideas to life in a dynamic, flexible and fun work culture.


Req ID:

801041BR



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