Senior Software Engineer - AI Engineering
Mercury - San Francisco, CA, New York, NY, Portland, OR, or Remote within Canada or United States
Posted Apr 6, 2026
Benefits
- Parental leave
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- Non-birth-parent leave
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- Family-building benefits
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- Mental health support
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Schedule
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Where they hire
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About this role
Senior Software Engineer - AI Engineering San Francisco, CA, New York, NY, Portland, OR, or Remote within Canada or United States In 1600, William Gilbert published De Magnete -the first systematic study of magnetism. He didn't just theorize; he built instruments, ran experiments, and shared what he learned so that others could go further. Three centuries later, those foundations helped power the modern world. At Mercury, we're making a deliberate, company-wide bet on AI. Frontier users are already pushing boundaries-building agents, automating workflows, moving fast. But they're doing it in silos. This role exists to change that: to take those scattered experiments and turn them into shared infrastructure, shared context, and shared capability. The goal is a multiplier effect-where the most ambitious AI work inside Mercury lifts the velocity of everyone else. What you'll do You'll join a team that has already started building Mercury's internal AI platform and enablement layer. Your work will be to extend, harden, and scale what's in motion , and to help partner teams adopt it. Extend the AI platform foundation - Build and evolve MCP servers that connect internal systems and data sources into a coherent interface for agents and engineers. - Expand and operate our LLM gateway infrastructure: routing, rate limiting, cost attribution, and observability across teams. - Turn early patterns into durable defaults: shared prompt libraries, guardrails, and policy-as-code so teams can move fast safely. Strengthen the shared company knowledge layer - Shape and maintain structured context artifacts-clean, reliable, agent-consumable-so LLMs working
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