Applied AI Research Engineer Voice & Long-Horizon Tasks

Posted yesterday

candidate companyMillbrae (CA)

Computer and Information Research Scientists Software Publishers

SENIORITY

Mid

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About the role

Sierra is a leading platform for customer-facing AI agents, based in San Francisco and expanding offices globally. We value trust, customer obsession, craftsmanship, intensity, and family, and seek builders who can advance post-training methods and deploy reliable agents. Join a team tackling challenging ML problems, collaborating across the stack to deliver customer value while growing our applied research capabilities and production systems.

Before you apply

Applying takes about a minute. These four things decide how fast it moves after that.

Your profile is current

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Two examples you can talk through

Not a portfolio — just two pieces of work where you can explain the decisions and what you'd change.

A number in mind

What you're on now and what would make you move. We negotiate better when we know both.

Your notice period

Employers plan around it, and it's the question that stalls offers most often.

Once you apply, someone reads it and calls you before anything reaches the employer — usually within two working days.