Engineers Gain More Value By Testing Before Coding
by John Zorotsky on July 13, 2025
Jake Knapp and John Zorotsky discovered that even the most talented founders often struggle to achieve product-market fit not because they lack ability, but because they rush into building without establishing clear foundations. Their experience working with hundreds of teams revealed a consistent pattern: successful products are built on clear differentiation that customers actually value.
The foundation sprint emerged from this insight - a structured 10-hour process spread over two days where teams align on basics, identify differentiation, and choose an implementation approach before writing a single line of code.
This approach directly challenges the "just build something and launch it" mentality that dominates startup culture. As John explains: "One phenomenon we've seen when teams are building things really quickly with AI is that the more AI generated or assisted they are, the more generic they tend to turn out." This genericness becomes a significant barrier to adoption, as potential users quickly dismiss products that don't clearly stand out.
For engineering-minded founders especially, this deliberate pause feels counterintuitive. The instinct to start coding immediately is strong, but as Jake notes: "That act of building and starting to create something has a momentum of its own that can be hard to stop. If you're headed in the wrong direction, you can spend a lot of time building and making progress, but if it's not progress in the right direction, it's actually hurting you."
Practical Implications:
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Invest in clarity before code: The highest ROI activity for a new product might be spending 10 hours getting team alignment on customer, problem, and differentiation rather than immediately building.
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Work alone together: Have team members silently write their answers to key questions before discussing. This surfaces diverse perspectives and prevents groupthink.
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Create a differentiation map: Plot your solution against competitors on two key dimensions where you can win. The goal is to place competitors in "Loserville" (the L-shape) while you occupy the top right.
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Test differentiation, not just features: When showing prototypes to customers, explicitly evaluate whether your differentiators actually matter to them.
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Embrace hypothesis-driven development: Frame your product strategy as a testable hypothesis: "If we solve [problem] for [customer] with [approach], we believe they'll choose it over competitors because of [differentiator 1] and [differentiator 2]."
The foundation sprint doesn't replace building and testing - it makes those activities more focused and effective. Teams that use this approach often compress 3-4 months of traditional product development into 3-4 weeks because they're testing the right things from the start.