Quick background: I used to code. Studied it in school, wrote some projects, but eventually convinced myself I wasn't cut out for it. Too slow, too many bugs, imposter syndrome — the usual story. So I pivoted, ended up as an investment associate at an early-stage angel fund, and haven't written real code in years.
Fast forward to now. I'm a Buffett nerd — big believer in compound interest as a mental model for life. I run compound interest calculations constantly. Not because I need to, but because watching numbers grow over 30-40 years keeps me patient when markets get wild. It's basically meditation for long-term investors.
The problem? Every compound interest calculator online is terrible. Ugly interfaces, ads covering half the screen, can't customize compounding frequency properly, no year-by-year breakdowns. I've tried so many. They all suck.
When vibe coding started blowing up, something clicked. Maybe I could actually build the calculators I wanted? I don't have to be a "real developer" anymore — I just need to describe what I want clearly.
So I tried it.
Two weeks and ~$100(Opus 4.5 thinking model) in API costs later: I somehow have 60+ calculators. Started with compound interest, naturally. Then thought "well, while I'm here..." and added mortgage, loan amortization, savings goals, retirement projections. Then it spiraled — BMI calculator, timezone converter, regex tester. Oops.
The AI (I'm using Claude via Windsurf) handled the grunt work beautifully. I'd describe exactly what I wanted — "compound interest calculator with monthly/quarterly/yearly options, year-by-year breakdown table, recurring contribution support" — and it delivered. With validation, nice components, even tests.
What I realized: my years away from coding weren't wasted. I still understood architecture, I still knew what good UX looked like, I still had domain expertise (financial math). I just couldn't type it all out efficiently. AI filled that gap perfectly.
Vibe coding didn't make me a 10x engineer. But it gave me permission to build again. Ideas I've had for years suddenly feel achievable. That's honestly the bigger win for me.
Stack: Next.js, React, TailwindCSS, shadcn/ui, four languages (EN/DE/FR/JA). The AI picked most of this when I said "modern and clean."
Site's live at https://calquio.com . The compound interest calculator is still my favorite page — finally exactly what I wanted.
Curious if others have similar stories. Anyone else come back to building after stepping away?
Now I build all sorts of apps for my farm and organizations I volunteer for. I can pound out an app for tracking sample locations for our forage associations soil sample truck, another for moisture monitoring, a fleet task/calendar/maintenance app in hours and iterate on them when I think of features.
And git was brand new when I left the industry, so I only started using it recently to any extent, and holy hell, is it ever awesome!
I'm finally able to build all the ideas I come up with when I'm sitting in a tractor and the GPS is steering.
Seriously exciting. I have a hard time getting enough sleep because I hammer away on new ideas I can't tear myself away from.
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