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Headway

Staff Software Engineer - Experimentation

Who can apply: Only open to applicants in: California, New York, Washington.
Location as listed by the employer: “Remote; San Francisco, CA; Seattle, WA; New York City”
Apply on Headway's site ↗

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About this role

Headway is hiring for a Staff Software Engineer - Experimentation role (full-time). See the official posting for full details.

Requirements

  • You have owned an experimentation or feature flagging stack end to end rather than only used one. Whether you built it from first principles or built the missing pieces on top of a vendor matters far less to us than hav…
  • You have built the parts that do not come out of the box: assignment that persists correctly, exposure that reflects what a user actually saw, identity resolved across sessions and devices, or the diagnostics that catch…
  • You are fluent enough in the statistics to be a real partner to data scientists. You can tell the difference between a result that is weak and a result that is invalid, and you can hold your position on a measurement qu…
  • You have debugged the hard class of measurement bugs: traffic that split unevenly, users who ended up in both arms, effects that vanished once you looked at who was actually exposed, identity that broke between anonymou…
  • You have built a program and not only a platform. You have measurably raised how well an organization experiments through defaults, templates, review, and teaching, not only through code.
  • You have made a build versus buy call on a platform and lived with it. You can reason about vendor risk and about where a warehouse-native approach beats a hosted one.
  • You have landed a migration on teams that did not ask for one, by making the new path easier than the old path rather than by mandate.
  • You use AI as genuine leverage in your work and you have clear opinions about where it must not be trusted without a human.

Summarized from the employer's posting — check the full posting for every requirement.