Product Manager, Agent Platform

Location: Greater London

# Product Manager, Agent Platform Siena AIRemote (London)
Full-timeAI tools:

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Own the product roadmap and day-to-day decisions for Siena’s platform powering customer experience agents. You’ll build systems to evaluate and monitor agent performance, run experiments, and work with engineering, deployment teams, and customers to improve the product.
* Permanent* Fully Remote
* 3+ years### Skills and expertise

WebhooksOAuthIntegrationsA/B testing

Agent evaluation and monitoring

Claude

Cursorv0### Key responsibilities
* Own the core agent platform roadmap and make its day-to-day product decisions.
* Build evaluation, testing, and monitoring systems and run experiments to improve agent performance.
* Work with customers and deployment teams to turn field feedback into product improvements.## How this job compares

Compared with 135 open mid-level product jobs on October 10, 2026.Similar open jobs:
We Love AI Jobs lists 135 open mid-level product jobs at 83 companies.

Remote work:
This job is remote. 44 of the 135 mid-level product jobs (33%) are remote.

AI in this role:
High. AI is the core of the work: building, training or deploying AI systems. The role owns the platform for AI agents and builds systems to evaluate, test, and improve their performance. It also calls for prototyping product ideas with coding agents.## Full description

Meet Siena Siena is the Agent of Record for CX, built for consumer brands like Spanx, FIGS, Brooklinen, and Grüns.

It runs as a connected multi-agent stack on top of a shared intelligence layer: agents that sell, support, listen, handle social and voice across the entire customer journey, turning every conversation into signal you can act on.

The team

We are a small, fully distributed, global team. We have built leverage into how we work, which is what lets a team this size move at the speed we do.

We hire athletes. Everyone here owns real outcomes, defaults to writing over meetings, communicates with directness, and acts the moment they see something worth acting on. Low ego, high standards, fast clock.

If you want to set the bar rather than follow one, keep reading.

The Role Siena runs customer experience for consumer brands through a connected multi-agent stack. As Product Manager, Core Agent Platform, you'll own the platform those agents run on, from its current capabilities to where it goes next. You'll own how we measure, test and improve agent performance, and how customers see it. You'll work directly with engineering, deployment and customers, and you'll be expected to build as well as specify.

What You'll Do
• Own the core agent platform end to end, including the roadmap and the day-to-day product decisions.
• Build and ship the evaluation, testing and monitoring systems that make agent performance measurably better over time.
• Design and run structured experiments and A/B tests across agent workflows.
• Give customers clear visibility into how their agents are performing.
• Prototype your own ideas with coding agents, and ship them where you can, rather than waiting on a hand-off.
• Work with customers and our deployment team to understand what's working in the field and turn it into product.

Who You Are The Bar:
If you're missing any of these, this isn't the role for you.
• 3+ years as a PM in CX, ecommerce, helpdesk or AI automation.
• Technical fluency: you can explain how webhooks, OAuth and integrations work and have made product decisions around them.
• AI-native builder: you use tools like Claude, Cursor or v0 daily and have prototyped your own product ideas with them.

Strong Signal:
Not deal breakers, but what separates a good hire from a…