A short list, kept for years.
A small number of long engagements, most of them running for years. The largest sits under NDA and cannot be shown here.
The ones I can name.
What actually changed
Numbers as their own analytics reported them — unrounded.

Infrastructure and CMS migration for a national technology news portal, with the codebase largely rewritten and the third-party build supervised line by line.
An acquisition left two overlapping platforms and one of them had to go. The work was making sure the retired brand's equity ended up on the surviving URLs rather than lost at cutover.
What they keep coming back to
Nobody was asked for this. Two of the three reached for the development background as the reason it worked.
“Martin was a key member of the team responsible for the technical condition of the liveagent.com and postaffiliatepro.com websites. Thanks in particular to his skills and expertise, we were able to compete with much stronger competitors in terms of website quality for a long time. I would definitely be happy to work with Martin in the future, I consider him to be one of the greatest technical SEO experts on the market. I definitely recommend working with him.”

“We've been working with Martin for several years now and we truly appreciate his professional and systematic approach, which also takes our business goals into account. In addition to his deep knowledge of SEO, he's able to break down proposed strategies into actionable steps and, thanks to his previous experience as a programmer, communicate them effectively to both our editorial team and our external developers.”

“Martin's development background established a foundation for implementing sophisticated strategies, particularly technical SEO initiatives. With him, our team significantly enhanced the performance of two high-traffic websites.”

Want to be on this list?
I take on a small number of engagements at a time, which is why the list is short. Whatever size your site is, if something is going wrong quietly, start with the call.
- No cost
- No commitment

