I'm Karell.
I've been writing code since ‘84.
Co-founded a company, scaled it, and sold it in 2015. Stayed through another acquisition in 2024. I’ve sat in the CTO chair more times than I can count, leading teams, fixing chaos, shipping products that ended up in Fortune 500s and military branches across countries.
I've also been the fixer who said yes until it wrecked me. The builder was grinding while others took the credit. The one who burned out carrying weight for companies that barely noticed.
Then came the crash. Motorcycle, metal, asphalt, silence. That was my reset.
I walked away from the executive grind.
Now I teach developers how to skip the years I lost.
So they can build leverage, not just code
Here's what I learned the hard way: Hard work won't promote you. Saying yes won't earn loyalty. Being reliable won't get you noticed. And staying purely technical won't keep you safe. It feels unfair, but it’s the truth.
Here’s the real problem: Most developers are stuck making one or more of the 5 core mistakes. Once you see them, you can't unsee them. And once you fix them, everything changes.
Over the next 5 days, I'll break down each mistake and show you exactly how to fix it.
Here's what we'll cover:
Day 1: You're waiting for permission instead of taking ownership, and that’s why you’re stuck as an order-taker
Day 2: You're optimising for speed instead of trust, and your code is burning your credibility
Day 3: You're invisible because you don't speak business, and technical excellence alone won't save you
Day 4: You're sacrificing yourself to burnout, and saying yes is killing your career
Day 5: You have no receipts, and good work without proof makes you forgettable
By the end of this series, you'll understand exactly how to move from stuck to strategically positioned.
From overlooked mid-level to promoted and respected. From burned-out fixer to leader with leverage. From an invisible contributor to someone execs actually listen to.
This isn't about working harder. It's about positioning smarter.
Tomorrow, we start with the mistake that keeps you trapped as an execution machine, while others shape the direction.
Watch your inbox.
Karell aka The Serious CTO