fault detected · trading loop
Your bot keeps dying at 3am.
We find out why — and stop it happening again.
Debugging and stabilization for individual traders' Python crypto bots. Non-custodial — we work against your code and your exchange API keys, never your funds. Bug fixes, real error handling, and a written diagnostic report you can actually read, delivered with tests that prove it.
If any of this sounds familiar, it's fixable
These are the failure patterns we see most often in retail trading bots — usually a handful of small, specific bugs, not a rewrite.
Stops trading with no error
A dropped connection or a single unhandled exception kills the whole process. No crash log, no alert — you just notice hours later that it's been sitting idle.
Duplicate or missing positions after a restart
Position state lives only in memory. Restart the bot and it forgets what it was holding — and can re-enter a trade it already made.
Orders rejected for "invalid precision"
Plain float math for order size drifts past what the exchange allows, and the order bounces — sometimes, not always, which makes it maddening to track down.
Rate-limited into silence
Tight polling loops with no backoff get throttled by the exchange, and a bare except: pass
somewhere swallows the error so you never see it happen.
No real logs to debug from
print() statements that vanish when the terminal closes. When something breaks overnight,
there's nothing to look at in the morning.
Slow, wasteful, or API-key-in-source
Redundant polling, blocking calls where async would do, and credentials committed straight into the script instead of environment config.
Four steps, one delivery
You send the code
Your bot's source (or a repo link), plus what you've noticed going wrong — crashes, missed trades, rejected orders, whatever prompted you to look for help. No exchange login or funds ever change hands.
Full diagnostic
Every bug found gets a severity, a root cause, and the symptom it explains — written up so you can read it even if you didn't write the original code. See a real example in the sample report.
Fixed in place, with tests
Error handling, retry/backoff, state persistence, and precision-safe order sizing — applied directly to your bot's logic, not rewritten from scratch. Tests cover the failure paths that used to crash it, so the fix is provable, not just claimed.
Delivered
Patched codebase, the diagnostic report, and a short walkthrough of what changed and why. You own all of it outright.
Three ways in, depending on how deep it needs to go
- Full read-through of your bot's code
- Written report: every bug found, severity, root cause, fix
- No code changes made
- Good if you want to fix it yourself, or decide first
- Everything in the Diagnostic Sprint
- Bugs fixed in place — error handling around every exchange call
- Structured logging + a small test suite covering the failure paths
- Patched codebase + report, delivered together
- Everything in Debug & Stabilize
- Performance pass — remove blocking calls, cut redundant polling
- Crash-alert hook (Telegram/webhook) so you know within seconds
- 30-day warranty on regressions tied to the delivered fix
This is the kind of fix you get
Tell us what your bot is doing wrong
Payment
Most jobs come through Upwork, Freelancer, or Fiverr, paid via that platform's standard escrow. If you reach out directly, pay by card/bank via the hosted checkout below, or crypto if you'd rather pay from the exchange account you're already in — both go to the same place:
Pay by card or bank transfer →Card details are entered on Melio's own secure page — never here. You'll get an invoice number (e.g. INV-0001) when a job is scoped — enter it in the memo/note field at checkout so the payment matches automatically. Card fees are set by Melio, not us.
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