Samuel Lissner is a Senior Software Developer with a strong focus on full-stack web development.


For more than 7 years I have worked as a professional software engineer.

My core expertise are customer facing web- and hybrid-mobile applications. I develop for corporate, medium-size enterprises and start-ups. I am a big fan of clean, modular and efficient code. Also, I love functional programming and prefer a declarative style of writing code.

Having been a technical product owner of 5+ developers, I love to move IT projects forward with the strength of my team.

My expertise is enterprise IT in the field of finance and insurance… 🤓 It’s a context where my “structured way of solving problems”, as my colleagues framed it, thrives.

Our biggest achievement: in a two years transition project, we successfully have replaced the customer facing portals of a German SDAX insurance corporate.

Software development is a team sport.


I wrote my first line of code in PHP as a teenager.

My professional Software career I started as a Junior Developer in Billy Mobile in 2016, a cool AdTech company in Barcelona, Catalonia, Spain.

From 2018, I worked for many years in the W&W Interaction Solutions GmbH (formerly known as treefin GmbH) as a Full-Stack engineer in Munich, Germany.

Today, I work as the founder and Senior Software Developer of Lissner Technology Consulting, S.L. – a software engineering company.

Originally from Germany, I live with my family in the lovely Priorat wine area in Southern Catalonia, Spain.