Two careers, in parallel: a working guide

I've been running an SAP architecture career and a startup simultaneously since 2022. Most days it works. Some days it doesn't. Here's the working guide, in case you're considering it.

Defend the containers

Day-job hours go to the day job. Startup hours go to the startup. The boundary is not a firewall, it's a polite agreement with yourself. You will violate it about twice a week, in both directions. That's fine. Hold the line on the third.

Pick the overlap. Exploit the overlap.

The overlap is bigger than people admit. UX, system thinking, what-the-user-actually-needs — all transfer perfectly between sectors. The vocabulary is different. The job is the same.

Delegate the things you're bad at, ruthlessly

You won't have time to fix the bug, write the post, AND make dinner. Pick one. Hire, automate, or skip the other two. Founders who insist on doing everything are founders whose startups die quietly while they're polishing a pitch deck.

Sleep is not negotiable

I learned this the hard way in 2023. The startup will not benefit from a tired version of you. The day job will notice. Your family will notice first. The ego cost of going to bed at 11 instead of 1 is the smallest cost on the list.

The Sunday rule

Sunday afternoons, no work. None. Walk, cook, read something not on a screen. This rule is the most expensive one to follow. It pays for itself by Wednesday.

Tell people what you're doing

Both employers, both communities, the tax office. Two careers in parallel is not a thing to hide. The day job will respect you more for the startup. The startup will sound sturdier with the day job behind it. Hiding it makes both of them suspicious.

Two careers in parallel is a privilege, not a heroism. Treat it like a privilege.

If you're tempted to do this — and a lot of people in their thirties and forties are — my honest answer is: it's worth it, but only if you protect your evenings, your weekends, and your sleep more aggressively than you protect either job.

On a Tuesday I am SAP. On a Friday I am startup. On a Sunday I am neither.

That is the trick. There isn't another.