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Senior Software Engineer, Test

Tin Can· Technology
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Seattle$175k - $195kFull-timePosted 4w ago

About the role

Senior Software Engineer, Test responsible for owning end-to-end and call-path test suites, building automated SIP tests in staging, and automating release processes to ensure every Tin Can call path (including emergency 911) is verified before ship.

Responsibilities

  • Own our end-to-end and call-path test suites — the automated checks that tell engineers a change is safe to ship
  • Build automated SIP test calls that run in staging before every merge — real calls verified for connection, audio, voicemail, and the call record afterward
  • Guarantee emergency calling with continuous, safe verification, so we can show that every Tin Can reaches 911
  • Grow regression coverage across the paths families depend on most — voicemail, contact approval, missed calls — so every release protects them
  • Automate the manual parts of our release process across mobile, backend, and firmware, so releases get faster and safer as the fleet grows
  • Shape our CI/CD: what runs on every pull request, what gates a deploy, and what a failing check blocks
  • Partner with firmware on repeatable release testing, and push on testability — device emulation, test hooks — so device behavior is verified automatically on every build
  • Measure the suites themselves — coverage of the paths families use, signal engineers can trust, and defects caught before they ship

Qualifications

  • 5+ years in software engineering, with deep experience in test automation for production systems where a failure is immediately felt by customers
  • Built end-to-end test suites that engineers trust — fast, deterministic, CI-integrated, and rarely failing when red
  • Comfortable tracing requests through a distributed system, reading telemetry, and writing tests that prove behavior (not just code)
  • Fluency using AI as a multiplier across diagnosis, analysis, and testing
  • Clear communicator who documents test suites and results
  • Hands-on and scrappy; able to build harnesses, fixtures, and CI plumbing, preferring automation over repetitive manual tests
  • Collaborative, low-ego mindset
  • Bonus: VoIP/telephony testing (SIP/RTP, sipp, synthetic call monitoring); mobile release testing (iOS/Android); hardware-in-the-loop testing for embedded devices

Skills

Required:End-to-end test automationCI/CD toolingTest strategy and telemetryCommunication and documentationAutomation mindset
Nice to have:SIP/RTP and VoIP testing

Benefits

  • Full benefits package
  • Equity available
Last updated Sep 23, 2026. Interested? Apply on the company site.
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About Tin Can

The super-magical Wi-Fi landline for kids

The super-magical Wi-Fi landline for kids. No screens, no texting, no strangers — just real conversation with Grandma, besties, and contacts you approve. Plug in, twirl that cord, and time-travel to pure voice fun.

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