Product Release Notes | Elena Calvillo at Product | Substack

I Built a Product 300 People Wanted Before It Even Existed

42% conversion rate. 3.6K project views. Built in less than 30 days with AI tools and $50. Here's the crisis that almost stopped everything and why your…

Dec 4, 2025 • Elena Calvillo at Product

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Recent posts

The 2025 AI Building Report Card: What Actually Worked (And Who Got Left Behind)

While some shipped products in 48 hours with AI, others spent a year in meetings. Here's who actually won in 2025.

Jan 15 • Elena Calvillo at Product

The Complete Product Playbook: How I Shipped AI Advent Challenge Without a Dev Team

Premium guide for paid subscribers

Jan 13 • Elena Calvillo at Product

Product Management Already Evolved: You're Just Now Realizing It

You no longer have the product management role you signed up for, and that's actually good news.

Jan 8 • Elena Calvillo at Product

2025: The Year I Stopped Writing About Building And Actually Started Building With AI

How launching AI tools, creating a 25-day AI challenge, and connecting with an incredible community taught me that product management is 90% about…

Dec 19, 2025 • Elena Calvillo at Product

Product Release Notes

Product Release Notes

Weekly AI product insights, and career strategies that help ambitious product managers stay ahead of the curve. Get practical templates, real case studies, and the strategic thinking that separates great PMs from the rest.

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AI

The 2025 AI Building Report Card: What Actually Worked (And Who Got Left Behind)

While some shipped products in 48 hours with AI, others spent a year in meetings. Here's who actually won in 2025.

Jan 15 • Elena Calvillo at Product

The Complete Product Playbook: How I Shipped AI Advent Challenge Without a Dev Team

Premium guide for paid subscribers

Jan 13 • Elena Calvillo at Product

Product Management Already Evolved: You're Just Now Realizing It

You no longer have the product management role you signed up for, and that's actually good news.

Jan 8 • Elena Calvillo at Product

2025: The Year I Stopped Writing About Building And Actually Started Building With AI

How launching AI tools, creating a 25-day AI challenge, and connecting with an incredible community taught me that product management is 90% about…

Dec 19, 2025 • Elena Calvillo at Product

When AI Creates Everything, Who Decides What Matters?

A conversation between a Product Designer and Product Manager on identity, creativity, and the uncomfortable future of digital work in the era of AI.

Dec 11, 2025 • Elena Calvillo at Product and Vadym Grin

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