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Sr. Systems Engineer (Linux)

| Greater LA Area
Core Digital Media looking for a Sr. Systems Engineer to join our DevOps organization. We need someone with a strong Linux background who is independent, flexible, and dedicated. We look for people with excellent analytical focus and ability to pursue problems head on, who can support and guide our continuous delivery implementation with right balance of security and speed. If you are passionate about systems side of software delivery to production environment programmatically, we are passionate about you.


  • You will investigate and guide the DevOps team in implementing industry standard methodologies from Linux system administration perspective. Specifically in regards to risk mitigation, security, automation and continuous delivery.
  • You will administer server hardware, Linux operating system and selected system applications.
  • You work with Development teams on application specific usage, performance tuning, and troubleshooting for Linux based systems
  • You serve as primary or secondary point of contact for various components of the Linux system.
  • You will respond to any service outage that affects the availability of the production website.
  • You are responsible for daily website usage and availability.

Skills we are looking for

  • Installing, Configuring and Securing RHEL, Centos, Fedora, or Oracle Linux
  • Setting up IDS (host & network IDS, network IDS), Securing OS, Web Servers and Java containers
  • Encryption/Security Appliance Administration
  • Ability to program in any language (Shell/Python/Perl/Ruby)
  • Setting up and supporting virtualization (cloning, DRS, HA)
  • Automation experience (Puppet/Ansible/Chef), configuration management experience and Git
  • Knowledge/experience of SSL certificate management, bonus points for experience in automating SSL management
  • Apache web-based application management
  • Physical hardware experience – racking, cabling
  • 24/7 on-call rotation experience

Nice to Have

  • Setting up EC2, S3 and VPC on AWS manually and programmatically using CloudFormation/Terraform
  • Configuring and supporting Splunk for search and security
  • Storage Administration experience with VNX, ZFS & NFS
  • Container Cluster setup and configuration (Docker/Kubernetes)
  • Networking Experience (Setting up tunnels, firewall and router/switches)
  • Middleware experience with JBoss/WildFly, embedded server (Tomcat/Jetty) architecture


  • Bachelor's Degree in Computer Science or related field preferred
  • 5 years of experience

Our technology team is responsible for the development and operations of all the consumer-facing web applications, our marketing platform and internal tools. We are leaders in online advertising – with a mobile first mentality. The marketing platform is built in-house and customized using cutting-edge technologies. Our marketing technology is available internally and externally - enabling our marketing team and our partners to run more effective campaigns. We are a fast paced working environment using Agile methodologies. Our applications are constantly evolving to keep up with latest developments in software industry. We leverage power of Java and popular frameworks such as Spring, Hibernate, AngularJS for building enterprise-class applications. We use a QA automation framework, built using Selenium Webdriver and Appium, for testing on an extensive combination of simulators and real devices. Our automation toolkit also includes automated visual validation testing – all of which allow us to scale efforts across mobile and desktop. Our applications runs on a highly scalable, virtual infrastructure which extends to the AWS for disaster recovery. We use modern release engineering tools, like Jenkins pipelines, for automated builds and deployments. We have scalable and redundant data storage platform to serve high transaction volumes. We have an active data warehouse evolving to a more real time mode leveraging Python, Spark and Kafka. We use best in class monitoring/alerting tools to quickly identify production issues. We are always innovating and taking advantage of the latest technologies to build scalable systems and drive growth for the organization.

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Technology we use

  • Engineering
  • Product
  • Sales & Marketing
    • GolangLanguages
    • JavaLanguages
    • JavascriptLanguages
    • PHPLanguages
    • PythonLanguages
    • RLanguages
    • ScalaLanguages
    • SqlLanguages
    • jQueryLibraries
    • jQuery UILibraries
    • ReactLibraries
    • Twitter BootstrapLibraries
    • NodeLibraries
    • AngularJSFrameworks
    • Node.jsFrameworks
    • SparkFrameworks
    • SpringFrameworks
    • HibernateFrameworks
    • HiveDatabases
    • Microsoft SQL ServerDatabases
    • MongoDBDatabases
    • MySQLDatabases
    • OracleDatabases
    • TeradataDatabases
    • KafkaDatabases
    • Google AnalyticsAnalytics
    • OptimizelyAnalytics
    • TableauAnalytics
    • R StudioAnalytics
    • MicrostrategyAnalytics
    • PythonAnalytics
    • IllustratorDesign
    • InVisionDesign
    • PhotoshopDesign
    • After EffectsDesign
    • DreamweaverDesign
    • PremiereDesign
    • Adobe AnimateDesign
    • Adobe XDDesign
    • ConfluenceManagement
    • JIRAManagement
    • WordpressCMS
    • Microsoft DynamicsCRM


We are located in West Los Angeles in the heart of Silicon Beach.

An Insider's view of Core Digital Media

What’s the vibe like in the office?

CDM is unique in that it exists in a competitive, fast-paced, ever-changing industry and still maintains its collaborative, nurturing community spirit. People are encouraged to think creatively and take risks; the result is a group of people invested in and energized by the work they do.

Chelsea Fusco

Social Marketing Manager

What makes someone successful on your team?

The most successful people are flexible and open to new ideas. Our industry, and even our individual roles, are constantly changing, so an ability to adapt and pick up on new clients, new processes, and new company goals is essential. Successful teammates are constantly pushing themselves to do better and think of innovative ideas.

Tamara Newman

Campaign Manager

What projects are you most excited about?

We are excited to be moving towards a micro services architecture which will allow us to create modular applications which are easier to build, maintain and deploy. We are re-architecting our front end to utilize newer UI frameworks. We are working on encrypting sensitive consumer data. We are also working on making our applications cloud ready.

Deepak Vashishtha

Sr. Director of Software Engineering

What are Core Digital Media Perks + Benefits

Health Insurance & Wellness Benefits
Flexible Spending Account (FSA)
Disability Insurance
Dental Benefits
Vision Benefits
Health Insurance Benefits
Wellness Programs
Retirement & Stock Options Benefits
401(K) Matching
Child Care & Parental Leave Benefits
Flexible Work Schedule
Vacation & Time Off Benefits
Unlimited Vacation Policy
Paid Volunteer Time
Perks & Discounts
Beer on Tap
Casual Dress
Company Outings
Game Room
Some Meals Provided
Happy Hours
Professional Development Benefits
Job Training & Conferences
Tuition Reimbursement
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