Fractional CTO  ·  Vertical AI

Fractional CTO for vertical AI companies in production.

AI is no longer a build problem; it's a system problem. When the model is shipped but the output still can't be trusted, I make your production AI reliable, then hand your team a system they run without me — a capability you keep, not a black box you rent. One named operator who owns it end to end, not a roster you manage.

  • 4.5 yr vertical-AI SaaS CTO (Artelize, real-time engine over 2M+ event pages)
  • 12 yr enterprise eng (Rakuten)
  • 6 yr air-traffic-control reviewer pedagogy
  • 4+ yr technical co-founder (DTS)
Volodymyr Poliakov — Fractional CTO for vertical AI companies
About

AI is no longer a build problem; it's a system problem.

You didn't come here because the agent doesn't work. It works in the demo. You came here because the agent is never done, reviewer hours stopped scaling, and every renewal quietly raises the accuracy bar. “We built it” and “it runs reliably in production” have become two different companies, and the gap between them decides whether you raise the next round.

I'm the one named operator who closes that gap by hand. I own the architecture and the reliability of your system, and I understand how every part of it behaves. Not a roster you have to manage, not a backlog being worked through. The fear isn't whether it'll work; it's being left dependent on something only the vendor can run. So what you're buying isn't me sitting on top of it forever — it's a capability your team keeps running after I step back: the runbooks are written in your engineers' language, your reviewers are trained, and the system stays explainable by the people who own it. The reliability gate becomes theirs, not a black box they rent.

Customer-success-as-engineering

Agent Operating Procedures, an eval cadence, a model-migration runbook, and workflow-definition discipline, so the same architecture absorbs customer #5 and customer #30 without your engineers re-firefighting the same surprise. It's written down, so your team runs it after I'm gone. Engineering capacity scales sublinearly with customer count instead of one-for-one.

Read the full definition →

Human-in-the-loop UX scaling architecture

Reviewer recruitment, queue management, throughput-per-credentialed-hour, multi-stakeholder review UX, and train-up pedagogy: the layer eval vendors don't touch. Each credentialed hour compounds two-to-three times, so per-document margin holds as you scale — and the playbook is yours, not a dependency on me to re-tune it each quarter.

Read the full definition →

Reliability degrades exactly when ownership is diffuse. An agent-team shop can promise you throughput; only undivided ownership can promise the system survives scale. Your eval stack (LangSmith, Langfuse, Braintrust) wraps into this, not against it: I sit beneath it and install the discipline it can't. The judgment is the product, not the dashboard.

Receipts

  • 4.5 yrArtelize — a vertical-AI SaaS for the performing arts whose AI I architected end-to-end: the real-time engine indexing 2M+ event pages, the generation that auto-builds artist and event pages, the recommendations, and the eval-cadence + model-migration discipline underneath. Paying institutions include San Diego Opera, Bay Philharmonic, and Fort Worth Opera. (The lead customer-success-as-engineering proof, lived once at depth.)
  • 12 yrRakuten — enterprise-scale engineering management, the reliability gate at size: Global Handler, a distributed micro-frontend I invented before Module Federation existed and ran in production for years; RBAC+ABAC unified across acquired companies; enterprise reporting under strict uptime; infrastructure carried bare-metal to Kubernetes.
  • 4+ yrDeep Thought Solutions — technical co-founder; 15 projects shipped, 6 multi-year. My billing and delivery vehicle; the work is mine.
  • 6 yrUkraine's national air-traffic-control centre — credentialed-reviewer-throughput pedagogy at safety-critical stakes (the load-bearing HITL-UX receipt; not a SaaS product)
  • 3 yrBulbee + Swipery — my own AI startups. Bulbee: a two-sided paid platform (specialists B2B and families B2C both paid a recurring fee), three-stakeholder review UX. Swipery: AI as the product itself.

Legaltech, healthtech, and insurtech I name honestly as pattern-by-analogy, not lived product depth. I'll tell you which is which on the first call.

This is for you if

  • “We built it” and “it runs reliably in production” have become two different companies for you
  • You're a US vertical AI agent company at the scaling-from-production moment — real customers, an agent in production, engineering cost tracking customer count one-for-one
  • Your reliability or comprehension gap sits in legaltech, insurtech, healthtech, fintech, proptech, govtech, HR-tech, or customer-support / revenue-ops AI

Not for you if

  • Your wall is security or compliance posture, not reliability — that's a cybersecurity / vCISO engagement, not mine
  • You're a PE or VC firm staffing a portfolio company — I work directly with the operating company
  • You're still at demo-to-production and haven't shipped to real customers yet
  • You have a FAANG-grade AI team and a co-founder CTO already in the room — the right answer there is the in-house team
  • What you need is code written by more hands — that's staff augmentation, not the architecture-and-reliability layer

Start: book the 15-min call below. You describe where the system is straining, I tell you what I'd look at first, and if there's no fit I'll say so. Or email hello@volodymyrpoliakov.com. (Prefer something concrete? A fixed-scope diagnostic, roughly $2–3K, maps where your production AI will break under load.)

Services

Four ways to work with me.

Four ways to bring in one named operator who owns the architecture, the reliability, and the understanding of your system by hand — built to hand back, not a roster you manage. Most engagements start with a 15-minute call; if there's no fit, I'll say so.

Scaling-debt diagnostic

$2–3Kfixed fee · productized
Format
A focused 30-day read of your production AI system the way the person who answers for it at 2am would.
Deliverable
A written reliability-and-architecture assessment, the ranked list of what breaks first at customer #30 and the next model migration, and a sequenced remediation plan. If a retainer follows, this fee credits toward it.
Best fit
Agents in production, the wall is coming; you want one clear-eyed read before committing to anything larger.
Book the diagnostic

Production-readiness sprint

$15–40Kfixed price · one scope
Format
A scoped engagement that takes one named reliability problem from “it mostly works” to “it holds under load.” I architect and build the fix by hand and own its reliability on the way out.
Deliverable
One stabilization outcome, scoped and priced up front — e.g. a model-migration runbook, a reviewer-throughput audit + queue/UX redesign, or the eval cadence + Agent Operating Procedures install — with a clean handoff your team can run without me.
Best fit
One specific reliability failure is hurting now, and you want it fixed at a fixed price by the person who stands behind it.
Scope a sprint
Most-asked

Operating fractional CTO

$12–30K/mooperating retainer
Format
I operate as your fractional CTO at the architecture and reliability level — the high-leverage core built by me, and I stay the reliability gate while your team keeps shipping the product.
Deliverable
Customer-success-as-engineering and HITL-UX scaling architecture installed and operated — and one named person who can tell you why each agent behaves the way it does, where it breaks under load, and what changes before it does, and can defend it in front of your board — a capability your team keeps running, not a dependency on me.
Best fit
A Series-A-to-B vertical AI agent company that needs the reliability layer installed now, alongside the permanent team you’ll eventually build.
Book a 15-min call

Advisory

$3–7K/mostanding seat
Format
Standing access without the operating seat — architecture and reliability review, and a named person to pressure-test the calls that decide whether reliability holds.
Deliverable
Recurring judgment for the hard calls — model-choice and vendor-neutrality decisions, eval-cadence and reviewer-throughput direction, “will this architecture survive customer #30,” and when to hire ahead of the wall.
Best fit
You have a team that can execute and a CTO or senior lead in place, but want one operator’s judgment on the decisions that compound.
Book a 15-min call
FAQ

Common questions.

Our agents are never done — every release fixes one failure mode and exposes two more. What does a fractional CTO do about that?
A fractional CTO installs the operational layer that stops the firefighting from compounding. "Agents are never done" is not a bug you patch; it is the system property you design for — and almost nobody designs for it at founding. I own the architecture, reliability, and comprehension of your system by hand and stay the reliability gate on every engagement, so the system holds at customer #30, survives a model migration, and stays legible to the team that has to answer for it.
Who is Volodymyr Poliakov?
Volodymyr Poliakov is a fractional CTO for vertical AI agent companies at scaling-from-production. He owns the architecture, reliability, and understanding of your system by hand — one named operator who installs the operational layer underneath your agents, not a roster you have to manage. His receipts: 4.5 years owning end-to-end the technology function of Artelize, a vertical-AI SaaS for the performing arts whose AI he architected — real-time indexing of 2M+ event pages, generation, and recommendations, with paying institutions including San Diego Opera, Bay Philharmonic, and Fort Worth Opera (the lead customer-success-as-engineering proof); six years running reviewer-throughput pedagogy at safety-critical stakes in Ukraine's national air-traffic-control centre (the load-bearing pattern-analog for reviewer-throughput design); three years with Bulbee, a two-sided paid special-needs ed-tech platform where both specialists and families kept paying, as the adjacent multi-stakeholder-UX analog; and twelve years in enterprise engineering management. Because he owns the system by hand, it stays documented in your team's language and handed off cleanly — the engagement ends with your people running it, not with him as the only one who can. He works through Deep Thought Solutions, his UK technical studio — but the person you procure is Volodymyr.
What does Volodymyr Poliakov do as a Fractional CTO?
Volodymyr makes your production AI reliable, then hands your team a system they can run without him. Concretely, he installs two things underneath your agents. Customer-success-as-engineering — the Agent Operating Procedures, eval cadence, model-migration runbook, and workflow-definition discipline that stop every new customer from spawning its own pile of engineering tickets, so engineering capacity scales sublinearly with customer count instead of one-for-one. And HITL-UX scaling architecture — the reviewer recruitment, queue management, throughput-per-credentialed-hour, multi-stakeholder review UX, and train-up pedagogy that eval vendors don't touch, so each credentialed hour compounds two-to-three times and per-document margin holds as you scale. What you buy is a capability your team keeps running after he steps back — the runbooks written in your engineers' language, your reviewers trained, the system explainable by the people who own it; not a black box only the vendor can run. He owns the hard parts by hand and stays the reliability gate while engaged, then hands the controls back.
Who is Volodymyr Poliakov's fractional CTO service for?
Vertical AI agent companies in the United States at the scaling-from-production stage — the Series-A-to-B transition, where shipping the model is behind you and reliability is what kills or saves the next round. The fit is sharpest when you have real customers, an agent in production, and a reviewer or human-in-the-loop step that has to hold as volume climbs — any regulated vertical where a human still stands behind the output. The pattern transfers by analogy from safety-critical reviewer throughput and multi-stakeholder review UX; in a strictly regulated domain like legal or clinical, where malpractice or defensibility is on the line, treat that as the lens to pressure-test on the call rather than a finished case study. It is not for pre-product teams still searching for the model, not for companies that want a coordinator to manage an outsourced agent team, and not for anyone who just needs more hands to clear a backlog — that is staff augmentation, not the architecture-and-reliability layer. You are buying one accountable named operator who owns the system, not a backlog being worked through.
Why now?
The build problem is solved; the reliability problem is the one between you and the next round — and the data validating that pain is now hard to argue with. AI is no longer a build problem; it's a system problem: "we built it" and "it runs reliably in production" have quietly become two different companies. Adoption already crossed the line: 88% of organizations now use AI in at least one business function, but fewer than 10% have fully scaled it in any single one (Stanford HAI AI Index 2026). Production is the wall — Gartner predicts more than 40% of agentic AI projects will be canceled by the end of 2027, on escalating costs, unclear value, and inadequate risk controls (Gartner, June 2025). The reason is structural, not a skill gap: today's best agents still fail roughly one task in three on the OSWorld real-computer benchmark (Stanford HAI 2026), and reliability compounds downward — chain eight steps that are each 85% reliable and the whole workflow succeeds only about 27% of the time (0.85^8, an illustrative model, not measured data). None of this is a new position; it is the named version of the pain you already have.
How much does Volodymyr Poliakov charge?
Four ways to engage, fixed or retainer and stated up front — no day-rate meter. Advisory at $3,000–7,000/mo is the lightest way in, for teams that have hands but need the gate. A production-readiness diagnostic is a one-off architecture-and-reliability read at $2,000–3,000 fixed — where your system will break under load and what to fix first. A production-readiness sprint is a scoped reliability-stabilization engagement at $15,000–40,000 fixed against a defined production wall. And the fractional CTO retainer is ongoing ownership of architecture, reliability, and comprehension at $12,000–30,000/mo, priced inside the AI-specialist operating band. You are already paying a day-rate somewhere; a retainer just stops rewarding slowness.
What makes Volodymyr Poliakov different from a cofounder-CTO, a senior engineer, or a FAANG team?
A cofounder-CTO, a senior engineer, and a FAANG team each solve a different problem than the one you have at scaling-from-production. A cofounder-CTO baked in at founding shipped a working model — a different job from a 4.5-year customer-success-as-engineering practice, because at founding there was no customer #30 and no reviewer queue to design for; Volodymyr is who you bring in when "we built it" stops being the same company as "it runs reliably in production," with a clean documented handoff to your permanent CTO once the wall is behind you. A senior engineer can plug in Braintrust or LangSmith — that was never the gap; the gap is self-authoring the operational layer underneath the tooling, so your team keeps shipping the product instead of re-firefighting the same surprise. A FAANG team in-house is the right answer at Series B/C — and 6–9 months of hiring runway you don't have at the Series-A-to-B transition; Volodymyr installs the layer that compounds now, alongside the team you'll eventually build, and hands it off cleanly. He does not replace it.
Why not just hire an AI agency, or a fractional CTO who brings an agent team?
AI agencies and agent-team shops sell throughput — more tickets closed, faster. They publish lines like "16+ in-house AI agent team" and "10–20X velocity" and price the package around $8–15K/month (those are their words). That is a real offer, for the part that was never the problem. The build problem is solved. Volodymyr sells what throughput can't promise: a system that survives scale — and that your team can keep running after he steps back. Here is why they structurally can't follow. When work is fanned out across agents and contractors, no single person can stand behind why the system behaves the way it does under load — and reliability is exactly the property that degrades when ownership is diffuse. Volodymyr keeps ownership undivided on purpose: one named person who built the high-leverage core by hand, stays the reliability gate, and can reconstruct any decision in the system from memory. Let them keep "faster" — he takes "still works at customer #30." He is also vendor-neutral: he keeps model choice a swappable decision inside an architecture he owns, and will tell you when to switch models or wrap a tool rather than buy more of one vendor's roadmap.
How do I book a discovery call with Volodymyr Poliakov?
Book a 15-minute discovery call at cal.com/volodymyr-poliakov/15min. It is a fit check, not a pitch — you describe where your production AI is straining, and Volodymyr tells you whether this is the right help. Bring the one symptom that worries you most. If there is no fit, he will say so on the call. Most engagements then start with the $2,000–3,000 production-readiness diagnostic, so you see how he works before committing to anything larger.
Discovery call

Book a 15-min discovery call.

You talk first. We focus on the AI scaling pain consuming most engineering time.

Book a 15-min call →

Prefer email first? hello@volodymyrpoliakov.com

No pitch, no slide deck. If there's no fit, I'll say so on the call.