Eleanor Millman, Senior Staff Product Manager, and Mina Tawadrous, Associate Director of Platform Engineering at SiriusXM, join host Justin Reock to discuss how platform teams can scale prioritization without relying on revenue.

They share how SiriusXM moved beyond RICE to build a custom framework for internal platforms, using weighted factors like developer speed, reliability, cost, and trust to guide decisions across teams.

The episode also explores their concept of “assumptions as code,” in which teams store and reuse assumptions in a central repository to reduce misalignment and improve decision-making, with AI helping to surface and validate those assumptions.

They close with how this system is shaping SiriusXM’s 2026 prioritization approach and what it signals about a broader shift toward builder-driven product development.

Where to find Eleanor Millman:

• LinkedIn: https://www.linkedin.com/in/eleanor-millman-98b10350

Where to find Mina Tawadrous:

• LinkedIn: https://www.linkedin.com/in/mina-tawadrous

Where to find Justin Reock:

• LinkedIn: https://www.linkedin.com/in/justinreock

In this episode, we cover:

(00:00) Intro

(01:17) Mina’s role and path into platform engineering

(02:03) Eleanor’s background and shift into product

(03:15) Scaling prioritization across platform engineering teams

(05:41) Aligning platform priorities with stakeholders

Assumptions as code: SiriusXM’s approach to platform prioritization