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[The Full Stack Builder Model: Redefining Product Development in the Age of AI]-[Why LinkedIn is turning PMs into AI-powered "full stack builders” | Tomer Cohen (LinkedIn CPO)]

Lenny's Podcast: Product | Career | Growth · B2 · 2025-12-04

Technology
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📋 Summary

The Full Stack Builder Model: Reimagining Product Development

In a rapidly evolving professional landscape, Tomer Cohen, the outgoing Chief Product Officer at LinkedIn, argues that the traditional methods of building products are no longer sufficient. As we approach 2030, Cohen notes that "the skills required to do your job will change by 70%," and the pace of technological change is currently "far greater than the time constant of response." To remain competitive, organizations must move away from complex, micro-specialized processes and return to "first principles" by embracing what he calls the Full Stack Builder model.

The Problem: Organizational Bloat and Complexity

Modern product development at scale has become bogged down by excessive process and organizational complexity. Cohen explains that what began as a rational approach to product building—research, specification, design, coding, and iteration—has expanded into a labyrinth of sub-steps. Companies now have multiple departments for every minor task, leading to a "micro-specialization" that results in "bloating." The consequence is a development cycle where it can take months to launch a single feature, leaving companies unable to "match the pace of change to the pace of response."

The Solution: The Full Stack Builder Model

The Full Stack Builder model aims to empower individuals to take a product from "idea to launch," regardless of their specific role or team. The goal is not to eliminate teams, but to assemble "small pods" of cross-trained builders who are nimble and adaptive. Cohen emphasizes that the core of this model is a "fluid interaction between human and machine."

Core Human Traits vs. AI Automation

Cohen identifies five key traits that human builders must retain and master, as these represent the areas where AI is not yet proficient:

  1. Vision: Developing a compelling stance on the future.
  2. Empathy: A profound understanding of unmet needs.
  3. Communication: The ability to rally others around an idea.
  4. Creativity: Generating possibilities beyond the obvious.
  5. Judgment: Making high-quality decisions in complex, ambiguous situations.

Everything else—data analysis, prototyping, and routine coding—should be offloaded to AI agents.

Implementing the Transformation: Platform, Tools, and Culture

Successfully implementing this shift requires a three-pronged investment:

  • Platform: LinkedIn has focused on "re-architecting all of our core platforms" so that AI can reason over them. Cohen warns that third-party tools rarely work "off the shelf" on complex internal codebases, necessitating deep customization.
  • Tools and Agents: LinkedIn has developed specialized internal agents, such as a Trust Agent (to identify vulnerabilities in specs) and a Growth Agent (to critique ideas based on historical data). These agents are trained on internal "golden samples" rather than raw, unorganized data, which Cohen notes is a critical learning: "It’s not great to just give it access to your drive... it actually does a very poor job understanding everything."
  • Culture: This is the most challenging piece. Cohen stresses that change management is critical. He is replacing the traditional APM (Associate Product Manager) program with an Associate Full-Stack Builder program, signaling a permanent shift in how the company hires and evaluates talent. By incorporating AI fluency into performance reviews and highlighting internal success stories, he creates the necessary incentives for adoption.

Conclusion: A New Way of Working

Cohen’s approach is a call to action for leaders: "If you’re waiting for a reorg... you’re waiting too long." The Full Stack Builder model is not just about adopting new tools; it is about shifting the mindset of the entire organization toward agility. For Cohen, the ultimate measure of success is not a job title, but the adoption of a "full-stack mindset" that enables individuals to thrive in a world where the only constant is change.

🎯Key Sentences

1
technology has always been about empowerment.
2
It's not about what it does for us.
3
It's about what it enables us to do.
4
change is happening faster than we're able to respond to it.
5
your job is changing.
Expand All

📝Key Phrases

1
go back to the drawing board
2
take their idea to market
3
fluid interaction
4
lean into
5
north of 70
Expand All

📖 Transcript

When we look at the skills required to do your job, by 2030, they will change by 70%.
So whether or not you're looking to change your job, your job is changing.
In order to stay competitive, you actually have to go back to some first principles, go back to the drawing board and reimagine what it means to be building.
You're experimenting with a very different way of building product at LinkedIn that fully embraces what AI unlocks.
We call it the full stack builder model.
The goal itself is to empower great builders to take their idea and to take it to market, regardless of their role in the stack and which team they're on.

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