Since early 2022, Alex has been active in crypto and trading, and in the years that followed he continued to deepen his expertise in this field. Through extensive hands-on experience across a wide range of market conditions, he gradually developed strong insight into market behavior and emotional discipline. Over time, his interest expanded into DeFi, where he has actively continued to grow and refine his skills. Within the team, Alex plays a supportive role in both trading and DeFi. His strength lies in providing clear guidance and communicating information in a structured and understandable way, enabling members to grow with confidence. He believes that sustainable progress is built on collaboration, structure, and the sharing of insights.
Meet Our People
The strategists behind your financial freedom.

CO-Founder / CEO
Matthias Krijt
Matthias is anything but an average entrepreneur. He is a serial strategist who has been building businesses, positioning brands and creating digital systems that deliver freedom since he was fifteen. As creative director he worked for names like Delta Lloyd, KPN, Eat Natural and Nivea, and in 2013 he built a multi-million euro e-commerce business. Since 2016 he has been fully focused on crypto and DeFi, where his nickname DeFi King symbolizes proven strategies and scalable cashflow models. With Yieldr, Matthias wants to show entrepreneurs and investors worldwide that financial freedom is not a dream, but a system - and that he has already mapped out the route to get there.

CO-Founder / CEO
Dylan van Vliet
Dylan is an experienced entrepreneur and investor with a proven track record in marketing, hospitality, real estate and EV infrastructure.As co-founder of Yieldr, he helps capital grow through advanced DeFi strategies. He is known for his ability to translate complex challenges into simple, scalable solutions. His expertise lies in strategy, leadership and building future-proof structures that deliver real results. From "computer wizard" at age 12 to building and selling businesses, his path shows that real growth comes from learning, adapting and moving forward. With Yieldr, Dylan guides serious investors to sustainable growth and financial freedom.

CO-Founder
Sander Görtjes
Sander has been working in digital marketing since 2004 and has a track record you do not just “make up.” He was Director of Digital Marketing at Qualcomm (Nasdaq-listed), built and sold two agencies (10FTER and 90FTE), and has been active in crypto since 2017 as an investor and builder with 40+ investments in emerging Web3 projects.
He is also the CEO and Co-Founder of HELLO Labs and the creator of Killer Whales, the crypto show on Apple TV and Amazon Prime. He works closely with foundations, exchanges, VCs, and KOLs/influencers worldwide. Like us, Sander believes DeFi is maturing: less hype, more cashflow, stronger risk frameworks, and access to real opportunities. And most importantly: more autonomy.

community manager & data insight
Alex lammertink

Adviseur Vermogensstructuur
Mathijs Vestjens
Mathijs is a driven wealth structure advisor with broad financial experience, specialized in wealth optimization for high-net-worth individuals and entrepreneurs. From home he learned at a young age to strategically use tax rules for tax minimization and financial advantages. At Yieldr, Mathijs helps clients sustainably grow their wealth through strategic structuring of tax boxes and structure choices (such as private or BV), aimed at minimal tax pressure and optimal cashflow suited to the situation. As an active player in crypto and DeFi, he also understands the workings and tax implications of these markets.

Community & Project Manager
Giel Coomans
Giel has been active in the world of crypto since 2018 and has also been delving into DeFi since 2024. With a strong focus on freedom and self-reliance, he helps people expand their financial knowledge and skills. Thanks to his technical background, he can explain complex crypto concepts clearly and comprehensibly. His critical eye ensures he always looks at information from multiple angles. This allows Giel to better guide Yieldr clients in their choices. He combines practical experience with theoretical knowledge to paint a complete picture. This gives clients the confidence and knowledge to take confident steps in crypto and DeFi.

DeFi Educator & Support
Guus Heezen
Guus has been active in crypto since 2021 and went through a steep learning curve in a short time. From entering too high and experiencing deep valleys, to developing a strong mindset and analyzing markets. His focus is on charts, market sentiment and spotting capital rotations in altcoins. In 2024 he discovered DeFi pools, where he set up his first positions within one weekend. Since then he has scaled up his knowledge and refined strategies with professional guidance. At Yieldr, Guus is known for his sharp analyses and practical approach. His most important lesson: "When in doubt, zoom out." He knows how to translate complex markets into clear insights that are immediately applicable. With Yieldr, Guus uses his experience to guide investors towards growth, stability and financial freedom.
