Updated speaker bios and images

_speakers/karlijn-en-erwin.md

@@ -14,4 +14,14 @@ website: https://www.rumvision.com/
 
 ## About {{ page.name }}
 
-<p></p>
+<p>Karlijn Löwik</p>
+
+<p>Karlijn is the CEO and co-founder of RUMvision, which offers real-time user monitoring to visualize and compare Core Web Vitals and other user experiences. Her mission is to make everyone understand the importance of site speed and UX, and to explain it in plain English rather than becoming overly technical. With her husband (who happens to be co-speaker Erwin) and 3-year-old daughter, she lives in Groningen, the Netherlands. Additionally, she is a board member of Mage-OS Nederland and advocates for accessibility and women in technology.
+
+<p>Erwin Hofman</p>
+
+<p>Started developing in 2001, Erwin gained performance knowledge and best practices via trial & error within his own agency and reading many (Google) docs. At the end of the last decade, Erwin started sharing his learnings. Both during public events and privately with merchants & development + SEO agencies via audits & training sessions to help them saving trial & error hours and allowing them to improve decision making with performance in mind. He shares best practices and (case) insights on regular basis via LinkedIn and co-founded real monitoring solution RUMvision.
+</p>
+
+<p>
+Web Performance Consultant & CTO RUMvision, twitter: @blue2blond , linkedin: https://www.linkedin.com/in/erwinhofman/ </p>

_speakers/michiel-gerritsen.md

@@ -10,8 +10,8 @@ website: https://www.controlaltdelete.nl/
 
 ## The talk: {{ page.title }}
 
-<p>"The Hyvä checkout is new and awesome, and it uses Magewire. But it does a lot of things differently compared to the Luma checkout, and that introduces a learning curve.
+<p>The Hyvä checkout is new and awesome, and it uses Magewire. But it does a lot of things differently compared to the Luma checkout, which introduces a learning curve. Next to that, implementing Payment Service Providers (PSPs) is not always as straightforward as it may seem. In this talk I will go over the challenges that I faced while implementing them.</p>
 
 ## About {{ page.name }}
 
-<p></p>
+<p>I am a freelance backend developer with over 15 years of experience in the e-commerce sector, including 8 years specializing in Magento. My passion lies in crafting clean, testable code that ensures robust and scalable solutions for my clients. When I'm not working on Magento projects, I enjoy 3D printing and caring for my chickens.</p>

_speakers/sanne-bolkesteijn.md → _speakers/sanne-bolkenstein.md

@@ -1,9 +1,9 @@
 ---
 layout: speaker
 title: "⚡ Rebuilding a community - what we can learn from the success of Mage-OS NL"
-name: Sanne Bolkensteijn
-permalink: /speakers/sanne-bolkensteijn/
-img: sanne-bolkensteijn.jpg
+name: Sanne Bolkenstein
+permalink: /speakers/sanne-bolkenstein/
+img: sanne-bolkenstein.jpg
 linkedin: https://www.linkedin.com/in/sanne-bolkenstein-12079726/
 website: https://www.hyva.io/
 ---