Virtus Opus runs fractional CFO engagements and startup advisory for early-stage founders — and builds the iOS products too. Twelve apps live on the App Store are the proof of the second half. Remote, worldwide, in English or Turkish.
A fractional CFO is a part-time chief financial officer: the same seniority as a full-time hire, sized to what an early-stage company actually needs. For most startups that means someone who owns the model, produces the reporting investors ask for, keeps runway honest, and is in the room when the financial decisions get made — without a full-time executive salary on a pre-revenue burn rate.
Strategic guidance from someone who has been on several sides of the table: twenty years of C-suite financial leadership with more than $40M raised across ventures, four companies co-founded — three failures and one exit — plus angel investments, a stint on the VC side, and mentoring across eight accelerator programmes. The failures are listed deliberately; they are the part that makes the advice specific rather than generic.
End-to-end design and development of iOS and web applications. The portfolio on this site is entirely our own work — every app was designed, built, shipped, and is maintained in-house, which is a more honest reference than a case study deck. Many are deliberately on-device and privacy-first, because that is a harder engineering constraint than sending everything to a server.
No discovery-call funnel, no proposal theatre. The goal of the first conversation is to work out whether this is worth doing at all — including saying so if it is not.
You describe where you are — stage, what you are building, and what is currently in the way. Thirty minutes, no pitch.
We come back with what we think the work actually is, what it would take, and what it costs. Sometimes that answer is "you do not need us yet."
Most engagements open with something bounded — a model, a readiness review, a first build milestone — so both sides can judge the fit on real work.
If it is working, it becomes ongoing. If it is not, it ends cleanly. No long lock-in on either side.
About fractional CFO work, advisory, and how engagements run.
A fractional CFO does the work a full-time CFO would do, on a part-time basis: building and maintaining the financial model, producing investor-ready reporting, managing budget and runway, preparing the data room and the numbers for a raise, and being in the room when financial decisions get made. The difference is cost and commitment, not seniority.
When the finance work is real but not yet a full-time job. Typically that is pre-seed through Series A: you have revenue or a raise coming, investors are asking for reporting you cannot easily produce, and the founder is spending too many hours in spreadsheets. A full-time CFO usually makes sense later, once the finance function needs a team rather than a person.
It depends on scope and intensity. Engagements range from a one-off piece of work — a financial model, an investment readiness review — to an ongoing monthly retainer. Rather than publish a number that would be wrong for most situations, we quote after a short conversation about where you actually are.
Yes. Virtus Opus is based in Istanbul and works with founders worldwide. Engagements run remotely across time zones as a matter of course, in English or Turkish.
Yes, and that combination is the reason Virtus Opus exists. The same practice ships production iOS applications — twelve are live on the App Store — and runs fractional CFO engagements. In practice it means the financial model reflects what the build will actually cost and take, because the people writing it have shipped the thing before.
Mostly pre-seed through Series A. Earlier than that, founders usually need advisory more than a CFO; much later, they need a full-time finance team. The sweet spot is the stage where financial rigor has started to matter but a senior full-time hire is not yet justified.
Stage, what you are building, and what is currently in your way. The first conversation is a conversation, not a pitch.