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Senior Software Engineer, Reliability

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Senior Software Engineer, Reliability in USA

  • Tin Can
  • Full time
  • Email
  • Seattle, WA

Responsibilities

  • Own the reliability outcomes for customer-facing calls, voicemail, and activation, including connection, reachability, and audio quality.
  • Make customer-visible change management explicit through reviewed, tested, and reversible production changes.
  • Own deployment pipelines and the production-like staging tier used to validate application and call-path changes.
  • Load-test the activation chain ahead of seasonal peak traffic.
  • Build product-outcome observability, including funnels, SLOs, and meaningful alerting.
  • Drive incidents to root cause across SIP signaling, media systems, Lambda services, and Postgres.
  • Own incident reviews, failure ownership, runbooks, and regression tests.
  • Partner with the reliability PM to turn diagnosis into an actionable engineering backlog.

Requirements

  • 5+ years building and operating production backend or distributed systems where downtime affects real users.
  • Strong AWS and infrastructure-as-code experience, including Terraform.
  • Experience owning reliability practices such as SLOs, alerting, load testing, and incident reviews.
  • Comfort with real-time and telephony systems, or strong willingness to learn SIP, RTP, and media behavior.
  • Fluency using AI for diagnosis, analysis, and testing.
  • Hands-on, scrappy approach to load testing and SIP trace analysis.
  • Clear written and verbal communication skills.
  • Collaborative, low-ego working style.
  • Preferred: production FreeSWITCH, Kamailio, carrier SIP trunking, seasonal peak load testing, Postgres at scale, consumer hardware fleet operations, or Grafana experience.

Benefits

  • Opportunity to work on technology intended to protect childhood and enable screen-free family communication.
  • Ownership of the company’s primary reliability objective and technical direction.
  • Small, high-trust, mission-driven team with meaningful influence from day one.
  • Room to explore ideas and challenge assumptions while building systems aligned with trust, simplicity, and care.

Salary: $175k - $195k/yr

Tin Can

Tin Can is a screen-free phone for kids that gives them the independence to call friends and family—without giving them a smartphone. Built like a modern landline, Tin Can connects over Wi-Fi and uses a simple mobile app for parents to control who can call in and out. There’s no browser, no app s...

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