I fix what is breaking in your post-launch SaaS.
Solo AI and automation consultant. Fixed scope, fixed price, one week. No calls, no retainers, no agency. The work I deliver is the work I do.
You pay only after the audit document is in your inbox.
Day 1 you email me. Day 2 you get a written audit document detailing every issue I found, with severity, root cause, and the exact fix. You read it. If you decide the fixes are not worth doing, you keep the audit and we are done. No half built work, no awkward refund conversations, no time wasted. The first money changes hands only after the audit lands.
Solo founders with a working product and a growing problem.
You shipped something with Cursor, Claude, or an offshore team a year ago. It works for 50 users. Then a paying customer hits an edge case, a webhook silently dies, an enterprise prospect runs a security review, and you lose a 40K deal in the first 10 minutes because your auth looks like a weekend project.
You know the foundation needs work. Every devshop pitches you a 3 month rewrite that will kill your momentum. I do the opposite. Stabilization in one week. The same scope I send you on day 1 is the scope I bill for on day 7. No expansion. No surprise.
Three productized packages. One custom track.
Pick one, send me your stack and what is breaking, get a fixed price within 24 hours.
Vibe-Code Audit + Stabilization
For solo SaaS founders post launch with shaky foundations. I find the 5 things that will break first (auth, schema, error handling, deploys, secrets) and I fix them. You get a written audit on day 2 before any further payment. Real fixes by day 7.
Reply Chaser Automation
For any business losing leads or revenue to slow follow up. Stripe webhook recovery, abandoned trial nudges, sales sequence automation, churn signal tracking. Built on n8n or your existing stack. Runbook included. You own the system end to end.
First 10 Customers Sales Motion
For solo SaaS founders who have a product but cannot get past 3 friends paying. Channel research, the first 30 outreach drafts written with you in the room (async), tracking setup, and a working motion you can run yourself.
Custom AI / n8n / Automation
Bigger or more specific builds. Scoped in writing first, fixed price after we agree. Recent shapes: 2-system n8n integration ~$3,000. Multi-agent reasoning bot with tool use ~$5,500. Full internal ops dashboard with AI summaries ~$7,500.
Four steps. No discovery calls. No surprises.
You email me
Stack, what is breaking, what you have already tried. Three things. No form to fill.
I respond in 24h
Fixed price for your case, or a referral elsewhere if you are not a fit. No calendar link.
Audit delivered
Written audit document in your inbox. You pay only after you read it.
Fixes shipped
Real changes in your codebase. Runbook so the same things do not break again.
Three engagements, three production saves.
Names removed because the work touches sensitive systems. Numbers and stack details are real.
Stripe webhook silent payment loss
A two-person B2B SaaS in Toronto charging by seat had been losing about 6 percent of monthly revenue for two months and could not find the leak. They thought it was Stripe billing errors. It was not. Their webhook handler was throwing on annual renewal events with multi-currency line items, returning 500, Stripe retried three times then gave up. The founder noticed it because a customer emailed asking why his card had been charged twice but his subscription showed cancelled. I found the bug on day 1 of the audit. Wrote a Postgres-backed retry queue, replayed 11 days of missed events, recovered 38 stuck subscriptions. Founder was running Next.js, Supabase, and Stripe.
Auth flagged in enterprise security review
Solo founder building HR analytics for mid-market companies, ~120 paying users, vibe-coded the entire MVP with Cursor in 6 weeks. NextAuth was set up with two roles: "admin" and "user". No row-level permissions. Session tokens in localStorage. He had a Fortune 500 prospect in late-stage talks, 32K USD annual contract on the table. The prospect's IT team ran a 30 minute security review and the deal died in the first 10 minutes of that call. He emailed me the next morning. We rebuilt the auth layer over 6 days: RBAC with 7 roles mapped to his actual user types, row level security in Supabase, full audit log with retention policy, session token rotation on every privileged action. He re-pitched the same prospect six weeks later with a 3-page security architecture doc I helped him draft and closed the contract.
Multi-agent research bot for an analyst
An independent equity research analyst covering ~40 small-cap consumer brands was burning 14 hours every Monday pulling SEC filings, news mentions, competitor pricing, and earnings transcripts for each watchlist company. He had tried Perplexity and a custom GPT, both gave him hallucinated dates and missing context. I built him a multi-agent research system on Claude with tool calling: one agent pulls structured SEC data, one scrapes news with a 30-day rolling window, one diffs against last week's brief and flags only the changes. Runs overnight Sunday, delivers a structured Markdown brief by 6 AM Monday. Self-hosted on his own machine, no recurring API costs because it pipes through his existing Claude subscription. The saved time goes back into actually calling companies, which has become his real edge.
Who I am NOT for.
Saying no early saves both of us a week. If any of these is you, hire someone else.
- Not for retainers. I do single fixed scope engagements. If you want monthly support, hire someone else.
- Not for free consultation calls. I do not have a calendar link. If you want to know if we are a fit, send me an email.
- Not for other consultants looking for subcontractors. I do my own work end to end.
- Not for someone who needs hand-holding through video calls. I am async only. We work over text and email.
- Not for SOC 2 or ISO compliance. I fix the foundation, I am not a security certification firm.
- Not for 3 month rewrites. If the answer is "rebuild from scratch", I will tell you that and refer you somewhere.
Qualify in 24 hours.
No discovery call. No calendar link. One email, three answers, fixed price back within 24h.
Send me an email with three things:
- Your stack: framework, database, auth, payments, hosting
- The one thing you are most afraid will break in production
- What you have already tried to fix it
One person. Built things under pressure before AI was a buzzword.
Kirill Derhachenko
Calgary based. I build and stabilize automation systems for solo founders and small teams. My focus is the boring expensive stuff: webhook reliability, auth that survives security reviews, multi-step AI reasoning flows that do not fall over in production.
Before this, I spent five years leading high-stakes public sector operations. Multi-disciplinary teams of ten plus people, multi-month campaigns, crisis communications, multi-million dollar procurement under public scrutiny. The kind of work where a missed deadline or a broken process becomes a visible incident the next morning. That is the operational mindset I bring to debugging your production code.
I have shipped production work with Stripe, n8n, Postgres, Supabase, Claude, and Next.js. I know where each of them breaks, and I know which 5 percent of the codebase causes 80 percent of the incidents. I am not the cheapest. I am the one who delivers exactly what we agreed on.
What I am working on right now.
Mid-engagement: stabilization audit for a Series A SaaS
Currently in day 3 of a stabilization engagement for an early-stage Series A SaaS founder. Found two silent failure paths in their onboarding flow that were dropping ~4% of new signups before they ever reached the dashboard. Writing up the root cause analysis tonight. Fixes ship by end of week. The interesting part: both bugs only fired on a specific timezone offset, which is why their existing tests never caught them. If you want to see what an audit document looks like in practice, email me and I will share a redacted version of an old one.