Who We Are

SREs work on improving the availability, scalability, performance and reliability of Twitter’s production services. Come join us.

Twitter’s globally distributed, real-time communications network generates trillions of events and petabytes of data per day. As postmaster you will manage all of email flow inside Twitter and ensure good email deliverability and reputation of Twitter email brands.

What You’ll Do

As a member of the organization, you will be dedicated to improving the reliability of our end-to-end platform. Your work integrates directly with Twitter’s products. Our core infrastructure receives hundreds of millions of tweets per day and serves tens of billions of API requests. Our other systems serve over 2+ billion search queries per day, render hundreds of millions of ad impressions, and process hundreds of terabytes of log and interaction data daily. We send equivalent number of emails and the postmaster is responsible for the deliverability. Postmaster will also does consultation work, when on boarding new and existing email clients.

You will work with open-source technologies and the SRE community.

You will actively participate in the vision to move away from high operational cost tasks like break fix, cluster migrations, new services buildout, abuse etc. You will want to be at stage in future where the service can shrink and expand based on demand, self heal, auto rollouts, with the least amount of human effort.

Your responsibilities include but not limited to:

  • You would perform deep dives into both systemic and latent reliability issues; partner with software and systems engineers across the organization to produce and roll out fixes
  • You will build relationships with ISPs and other industry partners.
  • Troubleshooting tools (i.e tcpdump, netstat, iostat, traceroute)
  • Experience with iptables or other firewall solutions
  • Ability to work with engineering teams and minimal hand-holding
  • Troubleshoot issues across the entire stack: hardware, software, application and network
  • You will Identify and drive opportunities to improve automation for the company; scope and create automation for deployment, management and visibility of our services
  • Participate in code reviews

  • You will participate in an oncall rotation with other engineers to support your services.Who You Are:

  • You have a solid understanding of MTAs.
  • You have solid understanding of email authentication and authorization protocols like dkim/dmarc
  • Practical knowledge of various anti-spam technologies
  • Practical, solid knowledge of shell scripting and at least one higher-level language (Python or Ruby preferred)
  • You have deep knowledge of feedback loops and bounce handling
  • Comfortable configuring DNS, DHCP, and LAN/WAN technologies
  • You are an experience with Linux systems engineering and troubleshooting
  • Minimum 3+ years of handling services in an internet scale *nix environment
  • Coding in one or more of the following languages: Python, Perl, or BASH
  • you should work well with and be able to influence myriad personalities at all levels
  • You can prioritize tasks and work independently
  • You should be adaptable and able to focus on the simplest, most efficient & reliable solutions

  • you have a track record of successful practical problem solving, excellent written and social communication, and documentation skillsDesired

  • Practical experience in Postfix, Exim or Msys.
  • Strong contacts at ISPs and track record of excellent deliverability
  • B.S. in computer science or similar fieldWe are committed to an inclusive and diverse Twitter. Twitter is an equal opportunity employer. We do not discriminate based on race, ethnicity, color, ancestry, national origin, religion, sex, sexual orientation, gender identity, age, disability, veteran status, genetic information, marital status or any other legally protected status.

San Francisco applicants: Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

Desired Skills and Experience

See application page for details