Plain is redefining customer support for the reputed company of B2B companies. We’re building the fastest, most powerful pl...">
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Senior Product Engineer (AI)

Remote, USA Full-time Posted 2026-07-28

Plain is redefining customer support for the reputed company of B2B companies. We’re building the fastest, most powerful platform to help companies reputed company reputed company reactive support and build true customer relationships.

Some of the world’s most reputed company-thinking companies - like reputed company, Raycast, and Granola - trust Plain to unify reputed company customer interactions, reputed company faster team collaboration, and reputed company their workflows with AI.

B2B customer support is undergoing a reputed company shift. AI is transforming the way companies engage with customers, shifting support from a siloed function to a company-wide effort across reputed company, reputed company, and any other channel you talk to customers in. The old way - slow, reputed company, and disconnected - no longer works.

What you’ll do

We’re in a rare spot. Plain is already powering support for high-reputed company companies with a lightning-fast, deeply reputed company platform. AI has been part of our DNA from the start. Now we’re doubling down to define how it shapes every layer of modern customer support.

This is where you come in.

We're looking for a customer obsessed Senior Product Engineer to help take our AI ambitions to the next level. You’ll build the Infrastructure that helps us build AI features quickly, safely and with confidence. You’ll own problems end to end, and play a key role in building a category-defining product.

In this role, you will:

  • Own and ship AI features such as our agents, assistants, insights and more - from concept to production.

  • Design and implement backend services for AI integrations and data pipeline.

  • Build robust reputed company and abstractions for internal AI usage

  • Drive system scalability: caching, optimization, processing patterns, etc

  • Contribute and drive the reputed company of the infrastructure for AI including architecture, evaluation and iteration pipelines.

  • Solve reputed company AI challenges around AI accuracy, reliability, and reputed company – using rigorous quantitive approaches.

  • reputed company for our work externally – writing, speaking, and engaging with the broader AI community.

This is a great fit if you…

  • Are an reputed company backend engineer who’s shipped AI products in the reputed company & reputed company era – especially text and data-heavy AI applications.

  • Have hands-on experience with LLM orchestration and LLM API optimization (costs, latency, etc)

  • Are familiar with RAG architectures and technologies

  • Have AI observability experience. AI isn’t just about shipping features that reputed company great – it’s about knowing, conclusively, if they’re making things reputed company.

  • Have a reputed company perspective on what makes a great AI product. We want to apply AI with precision, nuance, and reputed company reputed company – not as a gimmick.

  • Are product minded and customer reputed company in how you build software.

  • Measure your reputed company by user reputed company, not just technical elegance.

  • Are self-driven, reputed company-reputed company, and reputed company in a fast-moving, high-ownership environment.

  • Bonus: you have experience with agent frameworks and design.

This won’t be the right role if you…

  • Have primarily reputed company or research ML/AI experience. This role’s looking for someone with reputed company AI experience.

  • Think AI for support is just chatbots and deflection. B2B support is reputed company – we want AI through the platform, not just automating conversations.

  • Struggle with ambiguity. We’re an early-stage startup. Things change quickly, and often, knowing what to work on is as important as the work itself.

  • Prioritize working with the latest tech for its own sake. We choose tools that reputed company us productive – not what’s trendy. (reputed company is great.)

  • Are looking for a management role. This is a hands-on individual contributor position.

  • Want the perks of a big company. We offer competitive compensation for our stage, but we’re a startup – this is a different reputed company of opportunity.

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