Tech Events in Bussigny

Talk description
aaremarzili.info is a long-standing web app for checking the Aare river temperature, with roots going back to 2002.

When strong competition entered the market, I took over the platform and rebuilt it from scratch, investing around 100–200 hours. Despite solid traction, around 100'000 seasonal users and more than 500'000 requests, it became clear that competing at the same level would require significantly more time and resources.
Instead of building a native app, I chose a pragmatic path and developed a progressive web app. The project remained sustainable, even generating some revenue each season, leading to a decent balance overall, but over the years, usage only increased marginally. It worked, so I didn’t push it further.
That changed with the rise of Generative-AI.
In 2024 and 2025, I turned aaremarzili into my personal Gen-AI playground, but with real users and real production constraints.
In this talk, I’ll share:

• How I used AI to evolve an existing product
• How I my skillset changed
• What worked and what didn’t
• Real User Feedback
• And what it really takes to bring an AI-supported product into production

This is a practical, honest journey. No hype, just real learnings from building and shipping.

Speaker
David Wiedmer
Learning by doing is the principle that drives David Wiedmer. As a Senior Product Manager at FAIRTIQ with an engineering background, he focuses on turning ideas into real, working products.

He is the creator and maintainer of Aaremarzili, a platform used by thousands of people each season to check the Aare river temperature. What started as a side project evolved into a real-world playground for experimenting with AI and fast-paced product development.
By combining product thinking with hands-on building, David explores how AI can accelerate development and empower product managers to move from strategy to execution.
Outside of work, he is a father of two and enjoys building things that people actually use.

Talk language
English

How to get to QoQa "QG"
Please note: we won't be in the same room as last time. Meet us on the patio, near the entrance to QoQa.
Address: Route de la Chaux 4, 1030 Bussigny
By train: HQ is a 5-minute walk from Bussigny station.
By bus: From Morges station, take bus 702 to Bussigny station.
By car: Take the Crissier exit. Pay parking is available, but spaces are limited.
By bike: Bike parking is available at the entrance to the building.