Marian Kamenistak · CTO · VP Engineering · Head of Engineering

CTO Bottleneck: Five Decisions Route Through You

A CTO bottleneck is every directional call routed through the CTO. It worked at 20 engineers. At 80 it's why the roadmap slips, why your VPE is drowning, and why your calendar reads like an escalation queue. A better calendar won't fix it. Clearer decision rights will.

The unglamorous part is that this has to be written down, and almost nobody writes it down.

An engineering leader speaking to a mentee during a 1:1 community mentoring session.

Why saying you can decide this never works

You told your VPE they could decide it. They brought it back anyway. That isn't a confidence problem on their side, it's a risk calculation: if the call goes wrong and you weren't consulted, it's on them, and if they check with you first it's shared. Everyone below you is running that arithmetic, and verbal delegation loses to it every single time.

What changes the arithmetic is naming the decision class in writing, with the failure pre-forgiven out loud. Which calls your VPE owns outright, including the ones they'll occasionally get wrong. Which you sanity-check asynchronously, with a stated turnaround so that async doesn't quietly come to mean stalled. And which genuinely need a live conversation, a list that should be short and mostly about people and money.

Then the criteria pointing the other way, so the org knows when interrupting you is the correct move rather than guessing and defaulting to always. That's the half people skip, and it's the half that gives you your Fridays back.

By week 6 roughly 30% of what used to route through you no longer does, your VPE has a defined scope rather than an implied one, and the calls that still reach you are the ones that should.

Working it 1:1

Marian Kamenistak, mentor to CTOs and VPs of Engineering

Bi-weekly, and this one usually takes six sessions rather than a whole quarter. I have sat in the seat: helped build Mews into a $2bn+ unicorn from 8 to 80 teams, was an advisor to Manta (acquired by IBM), and spent 3 years in the Bay Area as Principal Software Architect at Databricks. The pattern data comes from 3,662 1:1 leadership sessions with engineering leaders in 17+ countries. Mentees rate every session from 0 to 10 right after it. Since 2024 the average is 9.79.

Pricing is public: 395 EUR per session, or 1,975 EUR per quarter (6 sessions over 3 months, 5 paid + 1 free). Same prices if you check fit and book with my AI tool: under 10 minutes to your first session, no discount. You only pay for a session you rate 8 out of 10 or higher. Full pricing.

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