About me
I'm Gleb. I've been building software for eighteen years — at Zalando, where I
learned what eCommerce looks like at scale, and at JUMO.WORLD, where I learned
what fintech does to your assumptions about correctness. I co-founded two companies
along the way, Rentoplan and Arendorium, and I've been consulting independently since
2019.
Today I lead engineering on smart building systems in Berlin. Before that the work was
web, mobile and IoT, across several countries and a few industries that had nothing to
do with each other. The through-line has never been a stack. It's been shipping things
that real people have to live with afterwards.
Why I mentor
Because the bottleneck is almost never knowledge.
I've watched a lot of capable developers stall, and it is very rarely because they
didn't know enough. It's because nobody was expecting anything from them on Tuesday.
Courses don't fix that. Documentation doesn't fix that. A person who notices when you
go quiet does.
That's the whole premise. I'm an ADPList Top 50 mentor and I've worked with 40+
developers — career changers, juniors trying to get to mid, and founders who need
someone technical in the room who isn't selling them anything.
What I'm working on
Most of my own time goes into agent tooling — systems that let AI write into a
knowledge base without inventing things. The rule I keep coming back to is that every
compiled page has to carry its provenance: what's actually true, what's assumed, and
what to do about the difference. I open-source that work as
Third Axis.
It's also the discipline I bring to mentoring. I'd rather tell you which part of your
plan is evidence and which part is hope than tell you it's all fine.
Practical details
- Based in Berlin, working in English and Russian
- I mentor across frontend, backend, full stack, UX engineering and Android
- Comfortable in JavaScript, TypeScript, React, React Native, Kotlin, Python, SQL, REST and GraphQL
- I play electric guitar badly and enjoy it enormously
Elsewhere
Want to work together?
Start with a free fifteen minutes. If it's a fit, the trial session is €50.