I built Nydar by myself. No co-founder, no engineering team, no DevOps person on call. Just me, a VPS, and a lot of late nights.
Last week I found out what happens when the "just me" part breaks.
The short version
I got hit with a serious infection. Thought it was COVID at first — it wasn't. Tested negative, got admitted, spent a week on IV antibiotics around the clock. I was too ill to look at my phone, let alone SSH into a server and check logs.
For a solo operation, that's the nightmare scenario. There's no colleague to ping on Slack. No on-call rotation. No "hey can you keep an eye on things while I'm out." It's just... whatever you built, running on its own, for as long as it takes.
What actually happened
Nothing. In the boring sense.
The API server stayed up the entire time. The ML models kept generating signals. The data feeds kept pulling from exchanges. The automated trading bot (not public yet, but it's running internally) executed 25 trades across the week, holding 5 positions when I finally checked in. Market hours caching kicked in as normal — the system backed off overnight and on weekends to conserve API quota, then spun back up at market open.
Nobody emailed me to say the site was down. Because it wasn't.
I'm not saying this to brag. I'm saying it because it surprised me a bit. When you're deep in the weeds every day — fixing bugs, tweaking indicators, optimising API calls — you don't always step back and notice that the thing you built actually works without you touching it constantly.
Why this matters if you're a user
If you use Nydar for paper trading, your positions, your watchlists, your dashboard layouts, your alerts — none of that depends on me being awake. The backend is a single Python process running behind Apache on a Linux box. It's not clever infrastructure. It's just built properly.
That's a deliberate choice. I spent time on the boring stuff that doesn't make good screenshots: API quota management, market hours awareness so the system doesn't burn through rate limits at 2am, proper error handling that degrades gracefully instead of crashing. The kind of work that only pays off when you're not around to manually intervene.
Last week was the first real test of all that, and it passed.
The solo dev tradeoff
There's an honest conversation to have about the risks of a one-person operation. I've worked on institutional systems — I spent years at Cowen on Wall Street, worked on ENNI (a £500M infrastructure programme), and helped deliver IT systems for Ireland's National Children's Hospital (a €2.24B project). I know what "proper" engineering looks like with teams of dozens.
Nydar isn't that. It's one person making every decision, writing every line of code, handling every deployment. The upside is speed and coherence — I can ship a feature in a day that would take a committee three sprints to scope. The downside is that when I'm on a hospital bed with a drip in my arm, nobody's shipping anything.
But here's the thing I keep coming back to: most of the trading platforms people use daily started as solo projects or tiny teams. The early versions of most software you rely on were held together by one or two people who cared enough to get the details right. Scale comes later. Resilience comes from caring about the boring stuff.
What I'm not going to do
I'm not going to pretend this was some profound life lesson. I got sick, I got treated, I'm recovering. The platform kept running because I spent time making it keep running. That's engineering, not philosophy.
I'm also not going to make promises about what's coming next. I'm still recovering and my head's not fully in it yet. When it is, you'll see it in the changelog, not in a blog post full of vague roadmap promises.
The takeaway
If you're evaluating trading tools, ask yourself: what happens when things go wrong? Not "what features does it have" — that's the easy question. What happens when the developer is unavailable, when an API goes down, when it's 3am and nobody's watching?
For Nydar, the answer last week was: everything kept working. I'll take that over a feature list any day.
If you want to see what a resilient trading platform looks like, start paper trading on Nydar — no sign-up required.
Originally published at Nydar. Nydar is a free trading platform with AI-powered signals and analysis.
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