You need a CTO who writes code, not just slides.
Strategy-only fractional CTOs leave founders with advice and no execution. Corelynx operates as a Technical Partner: C-level architectural judgment combined with hands-on capability — product architecture, code-level review, team building, and vendor accountability.
A fractional CTO fits when you need senior technical judgment 2–20 hours a week — architecture decisions, code and vendor review, hiring, roadmap discipline — but can't justify or attract a $300K+ full-time executive. The switch to full-time typically comes when engineering headcount passes roughly 15–20, or when technical leadership becomes a daily, not weekly, need.
Non-technical founders and small product teams face the same trap: technical decisions with long-term consequences get made without senior judgment, or a strategy-only advisor produces direction nobody can execute. The fractional CTO model solves the economics — senior leadership at a fraction of full-time cost — but only the Technical Partner variant solves the execution gap. Corelynx pairs C-level oversight with builder capability: we review the actual code, interview the actual candidates, hold the actual vendors accountable, and own the architecture decisions with you.
Investor-grade before investor meetings.
For founders pre-build or pre-raise, the fractional CTO engagement front-loads exactly what investors and engineers will interrogate — before either gets the chance.
Concept → architecture
Your idea pressure-tested into a technical shape: deliberate stack decision, build-vs-buy calls, data model, and a scoped v1 with real costs — the document that stops runway-burning guesswork.
Funding-ready technical narrative
The diligence pack before the diligence: architecture rationale, security posture, delivery plan, and cost model — so technical questions in the raise get answers, not pauses.
90-day MVP roadmap
Milestones, gates, instrumentation plan, and the metric your next round depends on — then owner-side oversight of the build, whether Corelynx builds it or your team does.
- Non-technical founders building in fintech, healthtech, or e-commerce
- VC-backed seed to Series A SaaS companies between funding and full leadership
- Bootstrapped product companies with 5–20 person teams
- Founders whose dev agency or offshore team has no senior counterweight
- An architecture decision with multi-year consequences is on the table
- You can't independently evaluate what your dev team or agency tells you
- Technical hiring is happening without a technical interviewer
- Investors are asking technical diligence questions you can't answer
- Velocity is dropping and nobody can say whether it's debt, team, or scope
What this problem looks like from the inside.
The structural causes underneath the symptoms.
The economics of full-time don't work yet
A real CTO costs $300K+ fully loaded and wants meaningful equity — unjustifiable at 5–20 engineers, so the role stays vacant and decisions drift.
Advisory without execution is abstract
Slide-level guidance can't review a pull request, interview a senior engineer, or catch a vendor cutting corners. The gap between advice and code is where startups get hurt.
Vendors grade their own homework
Without an owner-side technical authority, the party writing the code also judges its quality — and the incentives are exactly what you'd expect.
Founders can't see debt until it's velocity
Technical debt is invisible to non-technical leadership until features slow down — by which point remediation is expensive and morale has paid for it.
How Corelynx runs this work, phase by phase.
Baseline the technical estate
Architecture review, codebase assessment, team and vendor evaluation, and security/infrastructure posture — an honest picture, in plain language.
- Technical audit
- Codebase review
Set the architecture and roadmap
Decisions with long-term consequences get made deliberately: stack, build-vs-buy, data model, scaling path — documented so they survive personnel changes.
- Architecture decisions
- Roadmap discipline
Lead the team and the vendors
Hands-on engagement at the cadence you need: sprint oversight, code-level review, agency accountability, and technical hiring end to end.
- Team leadership
- Vendor accountability
Build investor-grade governance
Security posture, delivery metrics, documentation, and diligence-ready technical narratives — before the raise, not during it.
- Diligence readiness
- Technical governance
Plan the succession
The goal is graduation: we define when full-time leadership makes sense, help hire them, and hand over a documented, governed estate.
- Full-time transition
- Knowledge handoff
Explicit deliverables. No mystery boxes.
Engagement tiers & market-rate transparency
Aligned to 2026 market rates for US-based senior technical leadership. Every tier includes hands-on capability — the Technical Partner model, not advisory-only.
Systems we've shipped, not slides we've shown.
Stylized previews of representative builds — each links to the practice that produced it. Full anonymized case studies live on the results page.
MCA Lending CRM
Deal-flow CRM built for merchant cash advance: underwriting, sales, and servicing on one lifecycle with automated handoffs and governed pipeline reporting.
Government Digitization Platform
Citizen-facing portal and case-workflow system delivered under owner-side implementation governance — requirements re-anchored, rollout phased, adoption measured.
Growth Stack: Website + CRM + Automation
The full digital revenue engine as one fixed-fee build: modern site, integrated CRM, automation sequences, and a reporting dashboard — plus managed services after.
Payments-Integrated Ops Application
A workflow application wrapping payment-gateway and CRM data into operational tooling — architected, code-reviewed, and shipped under fractional CTO leadership.
What changes when this works.
Senior technical judgment on every consequential decision
Vendors and agencies held to owner-side standards
Technical hires evaluated by someone who's built teams before
Debt made visible and managed before it becomes velocity collapse
A technical story that survives investor diligence
Fractional vs. Full-Time CTO Calculator
Fractional vs. Full-Time CTO Calculator
Estimate the leadership capacity you actually need and see the recommended tier, monthly investment, and annual comparison against a full-time CTO hire — using 2026 market rates.
Architecture decisions, code and vendor review, hiring, sprint oversight — how much senior attention does the current stage actually require?
From direction-setting only, to hands-on code review, technical interviewing, and vendor accountability.
Engineers, agencies, and offshore teams the role needs to lead or hold accountable.
Direct answers, on the record.
Fractional fits when senior judgment is needed 2–20 hours weekly and a $300K+ executive isn't justified. Full-time typically becomes right past 15–20 engineers, or when technical leadership is a daily operational need. A good fractional CTO tells you when you've crossed that line — and helps hire their replacement.
See where yours lands →Advisory-only produces direction; a Technical Partner produces direction and executes it — code-level review, hands-on architecture, technical interviewing, vendor accountability. Many founders find strategy-only fractional CTOs frustratingly abstract precisely because the advice-to-execution gap stays open.
Market retainers run $3,000–$25,000/month depending on hours and depth, with US-based hourly rates of $200–$500. Corelynx tiers: Advisory $3,000–$6,000, Standard $8,000–$12,000, Executive $15,000–$25,000 — versus roughly $310K+ fully loaded for a full-time hire.
See where yours lands →It's one of the most valuable uses of the model. An owner-side technical authority reviews the agency's architecture and code, holds estimates and quality to standard, and ends the dynamic where the vendor grades its own homework.
That's the designed outcome, not a breakup. We define the trigger conditions, write the role, run technical interviews, and hand over a documented estate. The engagement ends with your technical leadership stronger than we found it.
Hire fractional while the engineering team is under about 15 people and the need is senior judgement — architecture, hiring decisions, diligence answers — rather than 40 hours a week of management. Most founders switch to full-time when the team passes 15 engineers or the roadmap needs a full-time owner; we define those trigger conditions in writing and help run the search when you hit them.
An agency is paid to build; a fractional CTO is paid to decide — and is on your side of the table when the agency proposes scope. Three things are inspectable before you talk to us: the sample SOW with its guarantee clause, the build calculator running the same math as our proposals, and the stack recommender, which will tell you to configure a platform instead of building anything.
With a one-week architecture sprint ($1,500-$5,000 fixed) that reads the codebase, infrastructure, and data model, then tells you plainly what to keep, what to refactor, and what to rewrite — with a priced sequence. You own the written recommendation whether or not we do the work.
See where yours lands →Related practices
Talk this through with a practitioner.
Bring your assessment result. The first conversation is about context and fit — nothing more.
Book a Strategy Session →Or request a tailored roadmap.
Tell us the situation; we'll outline how we'd sequence the diagnostic and what it would examine. Or see the engagement model first.
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