Service · Fractional CTO
Fractional CTO for AI Startups
Part-time technical leadership. Architecture calls, AI roadmaps, due diligence.
Since 2022 I have owned the architecture of systems that are expensive to get wrong: an event-sourced ledger for an SEC Reg CF platform, a HIPAA gateway moving 10,000+ clinical messages a day. This is that judgment, aimed at your roadmap.
Most pre-seed startups do not need a fractional CTO — they need one senior engineer who ships, and I would rather say that than sell a title.
TL;DR
- Covers architecture decisions, build-vs-buy calls, AI roadmaps, technical due diligence, engineering hiring, and infrastructure cost control.
- I have never sold an engagement under this title and will not relabel past work as one.
- The receipts are architectural: an SEC Reg CF ledger, 31 event types, 248 passing tests, zero production bugs.
- Justin R., VP of Enterprise Solutions and CEO of R Group LLC, on OpenConnect: “he doesn’t just write code, he thinks like a product owner.”
- If your bottleneck is shipping rather than deciding, hire an engineer. Every message gets a reply within 24 hours.
The challenge
Founders rarely fail on framework choice. They fail because nobody senior was in the room for the irreversible decisions — tenancy, identity, the event schema, vendor lock-in — and a year later every roadmap item costs triple to build.
What I build
Architecture Leadership
Own the irreversible calls — data model, tenancy, identity, event design — and document why
Build-vs-Buy Calls
What to build, buy, or delete, with maintenance cost stated upfront
AI Roadmap & Model Strategy
Which tasks need a model, how output is evaluated, what happens when providers degrade
Technical Due Diligence
Read the code, schema, deploy path, and tests for an investor or acquirer
Hiring & Code Review
Write the role, run the technical loop, review the risky pull requests after
Infrastructure Cost Control
Find where cloud and model bills go, cut what is not earning it
When do you actually need a fractional CTO?
When technical decisions outrun your ability to make them — you are choosing a database, an AI provider, or a build-vs-buy path, and the wrong call costs months. If your bottleneck is shipping features rather than choosing direction, hire a senior engineer instead.
The test is reversibility. A component library is reversible in an afternoon. An event model, a tenancy strategy, or where identity lives gets baked into every table that follows.
What does a fractional CTO do week to week?
Reviews the decisions in front of the team, writes them down, and holds the line on the ones that matter. In practice: architecture reviews, pull request review on the risky paths, vendor and model selection, engineering hiring loops, and infrastructure cost review.
Most of the value is written, not spoken. On the Reg CF backend, the rule that balances derive from an immutable event stream kept 31 event types coherent across 28 models.
How do you run technical due diligence?
I read the code, the schema, the deployment path, and the test suite, then report findings in plain language with every risk rated by cost to fix. No score out of ten — a buyer needs to know which problems are cheap and which are structural.
What surfaces is boring and expensive: no migration discipline, secrets in the repository, one person who understands deployment, tests that assert nothing. Run it before an investor does.
What proof is there that the judgment is real?
No project in my portfolio was sold as a fractional CTO engagement, so I do not claim one. The proof is the architecture: a regulated fintech ledger with zero production bugs, a HIPAA system that passed an independent security assessment, a multi-tenant platform delivered early.
On PSI Nest, compliance was architecture — four-role access control and six-year immutable audit retention. On NxtSzn, tenancy made 5 universities and 5,000 students survivable on one codebase.
Fractional CTO vs agency vs first full-time CTO
Qualitative only. Your constraint decides the answer.
| Fractional CTO | Agency | Full-time CTO | |
|---|---|---|---|
| What you buy | Decisions and direction | Delivery against a spec | Ownership and a team |
| Time to useful | Days | Weeks | Months |
| Reviews risky code | Whoever chose the approach | Often nobody | The CTO, once briefed |
| Best when | Judgment, not headcount | The spec is clear | The roadmap runs years |
| Fails when | Nobody executes decisions | Architecture follows sales | You hire too early |
| Cost of reversing | Low | Moderate | High |
Tech stack
Which of my builds proves this
None of this was sold as a fractional CTO engagement and I am not relabeling it. It is evidence of what the role is hired for.
SEC Reg CF Crowdfunding Backend
Event-sourced ledger, 31 event types, 6-state escrow, 248 passing tests, zero production bugs.
Read case study →PSI Nest — HIPAA Practice Management
Four-role access control, six-year immutable audit retention, independent HIPAA assessment passed.
Read case study →OpenConnect — HL7 Gateway
HL7/FHIR across 200+ patient monitors, 10,000+ messages a day, 99% delivery.
Read case study →How we work
Most MVPs ship in 3–6 weeks; complex platforms are scoped individually once the requirements are clear.
Intro Call
A 30-minute conversation about your project, goals, and timeline. No commitment either way.
Scoped Proposal
A written scope, architecture outline, and quote. I respond to every message within 24 hours.
Weekly Demos
You see working software every week, with written progress updates in between. No black boxes.
Ship & Handover
Deployment, documentation, and a clean handover — you own everything I build.
Compliance & standards
Frequently asked questions
Have you worked as a fractional CTO before?
How is this different from an agency?
Will you write code, or only advise?
What if we do not need one?
What does an engagement cost?
Ready to start?
Book a free 30-minute call. No sales pitch — just a direct conversation about your project.
Book Free CallOr email: contact@waseemahmad.dev