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Senior Backend Engineer, AI Platform & Scalable APIs

Posted today

xpanderMillbrae (CA)

SENIORITY

Lead

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About the role

XPander, Inc. is seeking a senior backend engineer to design and scale the infrastructure powering AI agents on the xpander.ai platform. You will own backend architecture and drive end-to-end development, from design to deployment. The role emphasizes building robust APIs, microservices, and data integrations with PostgreSQL, MongoDB, and Redis, with a hands-on focus on performance, reliability, and scalable systems for diverse use cases.

Before you apply

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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.

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