Daniel Souza
Co-founder & CTO
Promptbase
Daniel Souza is the co-founder and CTO of Promptbase, a marketplace and tooling platform for professional-grade AI prompts used by over 80,000 engineers and product teams worldwide. Before starting Promptbase, he spent six years as a machine learning engineer at companies ranging from early-stage startups to a Fortune 500 technology division — giving him a precise, unsentimental view of what actually works when AI moves from research into a product.
His day-to-day work at Promptbase puts him in direct contact with the question most engineering teams eventually face: when is the right time to fine-tune a model, and when is careful prompting enough? He has run this evaluation across dozens of use cases and customer deployments, and has developed a framework for making the decision that accounts for cost, latency, maintenance overhead, and long-term model dependency — the factors most tutorials skip entirely.
At BuildWithAI Summit, Daniel gives a direct, evidence-based breakdown of the fine-tuning vs prompting decision — not as an abstract comparison, but as a practical guide for engineering teams who need to make the call on a real product with a real deadline. You'll leave knowing exactly which approach fits your use case and how to make the argument internally without it turning into a six-week debate.
Session
Fine-Tuning vs Prompting — When to Use
Day 1
Engineering
A clear-eyed comparison of fine-tuning and prompt engineering — the cost, latency, and maintenance tradeoffs most tutorials skip over. After this talk you'll know exactly which approach fits which use case and how to make the argument to your team.
Session
Closing Keynote — What Ships Next
Day 2
Main Stage
A closing keynote on where AI product development is heading in the next 12 months — not predictions, but a framework for thinking about what to build next based on where the tools, the users, and the market are actually going. The talk you'll still be thinking about on the flight home.
Pick your seat.
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Available until August 1, 2026 or offer Sold Out
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