The Mozilla IT team is looking for  senior site reliability software engineer to join our growing SRE team at Mozilla. Are you someone that lives and breathes automation? Do you enjoy building tools for increased reliability? Do you love to deeply engage with engineering teams on ensuring the success of their products and services? If writing code and working closely with product teams, including sharing responsibility for the entire stack of a service, is what you live for, we would love to talk to you.

We're looking for new team members that are excited about working across a broad range of product areas, both those that we've bought or integrated, like our data platform, and ones we've built in-house, such as our user facing web properties. Through partnerships across the entire organization, we find ways to embed people like you into other teams to help bring engineering and operational excellence to projects and products. You will find yourself helping both with the development and deployment of specific technologies, as well as bringing back key insights and creating reusable patterns for future engagements. Furthermore, we value flexibility, so you're someone that is open to rotating across products and learning new skills regularly.

At Mozilla you will…

  • Partner with, and embed in, product development teams to build their services quickly, reliably, and securely. You’re comfortable with one or more programming languages, as well as system design and security fundamental
  • Tackle the engineering and operations responsibilities of services, including making changes to the OS all the way through writing application code
  • Enhance automation of deployments, particularly insisting on CI/CD wherever possible, and creating repeatable processes. You’re always looking to find a way to code a manual step out of existence
  • Improve the reliability of services through service design reviews, good architecture, and continual improvement. You’ll stress test environments and apply chaos engineering regularly, always ensuring that the system works the way it should in the face of failure scenarios
  • Write runbooks, improve documentation, and act as an authority in a domain. While a lot of the code you write will be self-documenting, you also value the ability to share information and provide transparency into all of the phenomenal work you do

Your Professional Profile

  • Fluent, and proven, ability to code in Python, Go, or Ruby
  • Three or more years of experience with AWS or GCP and a strong grasp of using cloud platforms to deploy infrastructure, including serverless patterns
  • Have developed solutions using containers, particularly Kubernetes
  • Hands-on experience with Infrastructure as Code tooling such as Terraform and CloudFormation
  • Worked in an Agile fashion, using Scrum, Kanban, or similar and delivering iteratively
  • Familiarity with data management, data analytics, and data tooling
  • Experience with configuration management tooling, such as Chef, Puppet, or Ansible
  • Knowledge of monitoring and logging solutions, such as Prometheus, CloudWatch, New Relic, DataDog, and CloudWatch Logs

About Mozilla

Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online.

We are an equal opportunity employer and value diversity. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.


Level: P4


Apply for this Job

* Required

File   X
File   X

U.S. Equal Opportunity Employment Information (Completion is voluntary)

Individuals seeking employment at Mozilla are considered without regards to race, color, religion, national origin, age, sex, marital status, ancestry, physical or mental disability, veteran status, gender identity, or sexual orientation. You are being given the opportunity to provide the following information in order to help us comply with federal and state Equal Employment Opportunity/Affirmative Action record keeping, reporting, and other legal requirements.

Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiring process or thereafter. Any information that you do provide will be recorded and maintained in a confidential file.

Race & Ethnicity Definitions

If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection. As a government contractor subject to Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measure the effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categories is as follows:

A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service-connected disability.

A "recently separated veteran" means any veteran during the three-year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service.

An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense.

An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985.

Form CC-305

OMB Control Number 1250-0005

Expires 1/31/2020

Voluntary Self-Identification of Disability

Why are you being asked to complete this form?

Because we do business with the government, we must reach out to, hire, and provide equal opportunity to qualified people with disabilities1. To help us measure how well we are doing, we are asking you to tell us if you have a disability or if you ever had a disability. Completing this form is voluntary, but we hope that you will choose to fill it out. If you are applying for a job, any answer you give will be kept private and will not be used against you in any way.

If you already work for us, your answer will not be used against you in any way. Because a person may become disabled at any time, we are required to ask all of our employees to update their information every five years. You may voluntarily self-identify as having a disability on this form without fear of any punishment because you did not identify as having a disability earlier.

How do I know if I have a disability?

You are considered to have a disability if you have a physical or mental impairment or medical condition that substantially limits a major life activity, or if you have a history or record of such an impairment or medical condition.

Disabilities include, but are not limited to:

  • Blindness
  • Deafness
  • Cancer
  • Diabetes
  • Epilepsy
  • Autism
  • Cerebral palsy
  • Schizophrenia
  • Muscular dystrophy
  • Bipolar disorder
  • Major depression
  • Multiple sclerosis (MS)
  • Missing limbs or partially missing limbs
  • Post-traumatic stress disorder (PTSD)
  • Obsessive compulsive disorder
  • Impairments requiring the use of a wheelchair
  • Intellectual disability (previously called mental retardation)
Reasonable Accommodation Notice

Federal law requires employers to provide reasonable accommodation to qualified individuals with disabilities. Please tell us if you require a reasonable accommodation to apply for a job or to perform your job. Examples of reasonable accommodation include making a change to the application process or work procedures, providing documents in an alternate format, using a sign language interpreter, or using specialized equipment.

1Section 503 of the Rehabilitation Act of 1973, as amended. For more information about this form or the equal employment obligations of Federal contractors, visit the U.S. Department of Labor's Office of Federal Contract Compliance Programs (OFCCP) website at

PUBLIC BURDEN STATEMENT: According to the Paperwork Reduction Act of 1995 no persons are required to respond to a collection of information unless such collection displays a valid OMB control number. This survey should take about 5 minutes to complete.