WeAreDevelopers Logo WeAreDevelopers
Sign in
For You LIVE
World Congress 2025 • Aug 20, 2025 • Session details

82 Bugs I Collected in a Year You Won’t Believe Made It to Production

François Martin

One engineer documented hundreds of production UI bugs. These glaring defects carry severe business risks. Discover proactive testing strategies to eliminate costly front-end leaks.

Pause
Mute Enter Fullscreen
#1 about 9 min

Bizarre software defects discovered in live production environments

Observing live application faults demonstrates how basic data formatting errors degrade end-user experiences.

#2 about 3 min

Tracking the frequency of software defects over time

Visualizing defect accumulation over a multi-year period uncovers unpredictable spikes in live deployment issues.

#3 about 3 min

Categorizing the most common production software UI defects

Categorizing collected runtime deviations demonstrates that superficial rendering errors outnumber complex backend logic faults.

#4 about 8 min

Mitigating UI responsiveness bugs via mobile-first testing strategies

Adopting mobile-first design and end-to-end device emulation prevents blocking UI misalignments.

#5 about 7 min

Addressing unpredictable UI glitches through dogfooding and monitoring

Leveraging dogfooding and heat map visualizers helps catch chaotic rendering errors before users experience them.

#6 about 3 min

Preventing unresolved templating errors with automated string assertions

Implementing unit tests to verify placeholder resolution avoids displaying broken strings to end users.

#7 about 3 min

Securing unfiltered error messages against infrastructure information leaks

Hiding production stack traces and mapping internal backend errors to generic user messages closes critical security vectors.

Matching moments

41 sec

Overcoming production bugs with zero-touch debugging automation tools

Michel Francis

2:35 min

Managing vulnerabilities in production environments through bug bounties

Milecia Mcgregor · LIVE

3:08 min

Preventing catastrophic failures in high-stakes software

Lars Hupel · World Congress 2023

2:56 min

The impact of minor user interface bugs on trust

Ramona Schwering Ramona Schwering · LIVE

1:54 min

Embracing failures and analyzing high-profile software engineering mistakes

Christian Seifert · World Congress 2022

2:59 min

Financial and human costs of software defects

Evelyn Haslinger · LIVE

More from World Congress 2025

GenAI Security: Navigating the Unseen Iceberg thumbnail
24:33
10 months ago

GenAI Security: Navigating the Unseen Iceberg

Maish Saidel-Keesing

Behind the Code: How Women Are Powering the Future of AI thumbnail
30:28
about 1 year ago

Behind the Code: How Women Are Powering the Future of AI

Alexandra Wudel, Laura Moritz, Madalina Florean

The AI Hype Filter: What’s Real, What’s Investable, What’s Noise? thumbnail
28:12
about 1 year ago

The AI Hype Filter: What’s Real, What’s Investable, What’s Noise?

Justus Lumpe, Konstantin Vinogradov, Nils Eiteneyer, Stephan Wirris

AI in Leadership: How Technology is Reshaping Executive Roles thumbnail
28:19
about 1 year ago

AI in Leadership: How Technology is Reshaping Executive Roles

Bernd Datler, Jasmin Kaiser, Jeff Hausmann, Sonja Alvarez

The AI-Ready Stack: Rethinking the Engineering Org of the Future thumbnail
28:09
about 1 year ago

The AI-Ready Stack: Rethinking the Engineering Org of the Future

Alex Laubscher, Jan Oberhauser, Keno Dreßel, Mirko Novakovic

AI Sovereignty: What Does It Take? thumbnail
29:13
about 1 year ago

AI Sovereignty: What Does It Take?

Boris Hecker, Clemens Wasner, Robin Hermann, Sonja Alvarez

Upcoming sessions on this topic

Open session

World Congress 2026 North America

Why Your iOS App Feels Broken After an Hour: Diagnosing Long-Session Performance on Real Devices

Vasuki Uday Kiran Vudathala

Staff Performance Engineer at ServiceNow

Vasuki Uday Kiran Vudathala
Open session

World Congress 2026 North America

How to generate business value through performance optimizations

Nikolai Sidiropulo

Software Engineer at Meta

Nikolai Sidiropulo
Open session

World Congress 2026 North America

Engineering Moneyball: How We Benchmarked Google vs Meta

Jirka Bachel

Co-Founder & CEO

Jirka Bachel
Open session

World Congress 2026 North America

Agents Can't Iterate Against Tests That Lie

Rocky Warren

Senior Staff Software Engineer at Clipboard

Rocky Warren
Open session

World Congress 2026 North America

Evals Are Infra: Building AI Systems Developers Can Actually Trust

Phoebe Wang

Member of Technical Staff at OpenAI

Phoebe Wang
Open session

World Congress 2026 North America

Know Your Enemies: Live Exploit of a PHP Engine Security Breach

Alexandre Daubois

CTO of Les-Tilleuls.coop / Symfony Core Team / PHP & FrankenPHP Core Maintainer

Alexandre Daubois

Related videos

The Software Bug All Stars - and what we can learn from them thumbnail
27:27
World Congress 2022 • about 4 years ago

The Software Bug All Stars - and what we can learn from them

Christian Seifert

Answering the Million Dollar Question: Why did I Break Production? thumbnail
29:38
World Congress 2024 • about 2 years ago

Answering the Million Dollar Question: Why did I Break Production?

Luís Ventura

Let's get visual - Visual testing in your project thumbnail
44:59
JS Congress • almost 5 years ago

Let's get visual - Visual testing in your project

Ramona Schwering

How to ignore bugs (safely) thumbnail
23:03
World Congress 2023 • almost 3 years ago

How to ignore bugs (safely)

Anja Kunkel

How not to test thumbnail
43:07
World Congress 2021 • about 5 years ago

How not to test

Golo Roden

Let's get visual - Visual testing in your project thumbnail
54:23
LIVE • over 3 years ago

Let's get visual - Visual testing in your project

Ramona Schwering

Related articles

From learning to earning

Jobs that call for the skills explored in this talk.