Here is what I think about your site from the perspective of a potential customer:

• what is GitHub?
• who is that guy? I cannot see an introduction. Seems untrustworthy
• what does he mean by "get a quote"? Quote of what?
• what are those pictures? Technologies? Of what?
• what is a stack?
• what does he mean by legacy adaption? Is he refering to my site, which is good and I paid someone a thousand bucks just yesterday? How dare he?
• what is Elm Lang?
• what is SPA?
• what is Node.JS?
• what is CSS?
• what is a frontend build routine?
• he wants to travel? That's bad. Will he have time for me? Will he just take my money and run off?

Here is what I think from the perspective of me:

• Create a more welcoming entrance. Add a picture of yourself. Add a short (read as SHORT) description of who you are. Google for best practices of self introduction.
• Do not throw technologies at your customers, but solutions. Customers in general don't know and don't care about how you do stuff.
• Don't denote your customer's stuff as "legacy". Tell them that you can extend their existing software and sites.
• I don't think it's a good idea to leave so much space on the left while squeezing all the content on the right. Go for a more balanced approach. Do you know, why today's screens are very broad, but not very high? That's because of how we humans see. Go for a broader design instead of lots of scrolling.
• You should use the most space for what you want to sell (instead of the technologies)
• Does your location matter if it is not accurate? Who is your target audience? Local people? Someone who drops you a mail from someplace else in the world?
• You need a stronger contrast for your text vs. the background in some places

Since you only asked about content, I did not take a look at your code.

Yes you indeed need to prove what you can do. Proofs are everything. You also need a photo of yourself, it makes you more trustworthy.

I get the impression when I read through your site that you just started freelancing, that's fine, but as a customer I might feel more safe taking someone with experience, so don't make it too obvious you are new.

As my plans will rise, I will relocate and travel more often

It seems you are not sure about what to do with yourself? How can I trust you don't escape my order then :-)

Don't let GitHub and Stackoverflow (that link doesn't work btw) be your profiles, take the content to your site.

Be a little more natural the way you tell about yourself, so it doesn't feel like a standard interview.

Try think of yourself as a product, you are the product that other companies wanna buy/lease to deliver a task. How would you make a website that sells a single product? Try convert those concept to selling yourself.

Make people believe you are the number one for task.

Would be good to show a portfolio of your work and social proof i.e. customer testimonials. (linking to a GitHub account isn't enough)

I see you have reserved the domain ship-ready.com. Don't you think robingruenke.com would be better? Now it's free I recommend you get it ASAP! No need for fancy names. Once you own your name you can adapt the site to your current career.

The other commenters have already given excellent feedback about the content. Concerning the design, it's fine if you put a picture on the left fixed column but it looks a bit plain.

Thanks everybody for participating, that meant a lot to me ! Great community thumbs up