Jean Lee was engineer #19 at WhatsApp. She’s seen what separates the builders who advance from the ones who plateau — and it has nothing to do with how fast they ship code. This piece is her take on what actually matters in 2026.
At a Glance
In this piece, you will learn:
Why AI is making execution cheaper but judgment more valuable — and what that means for your career
The real difference between builders who thrive and builders who get stuck
Three concrete habits to practice now to stay ahead in 2027
This post is prepared with Guest Author — Jean Lee, former Software Engineering Manager at WhatsApp (engineer #19) and founder of Exaltitude, a career growth platform for engineers. If you also want to write for Creators AI — send us email here
One of the most common things I hear is that AI is changing what creates value.
I don’t think that’s true.
Whether you’re building software, running a startup, or leading a team, your long-term success has never been determined by how fast you execute. It’s been determined by the quality of your decisions.
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Building products is one of the clearest examples of this. Compare it to manufacturing. If a factory produces more cars with fewer defects, that’s clearly better. Success is measured with objective metrics like output, defect rates, and efficiency.
Knowledge work is different. You can’t measure a “good product,” “good strategy,” or even “good code” the same way. Two experienced builders can solve the same problem in completely different ways, and both can be right. They may disagree about simplicity versus flexibility, speed versus scalability, or whether a solution is unnecessarily complex. Those debates happen every day because building products is full of tradeoffs, not objective answers.
That’s why the people who advance in their careers aren’t necessarily the ones who produce the most output. They’re the ones who consistently solve important problems, make sound decisions, and earn the trust and respect of the people around them.
AI isn’t changing what creates value. It’s changing what becomes scarce. As implementation becomes easier, the ability to make good decisions becomes even more visible.
This is why I think we’re starting to see two groups of builders emerge.
