FAQ, terms and more

What the role is, how an engagement runs, how it compares with the alternatives, my full profile, and the questions people ask before the fit call. Prices are on the homepage.

What a fractional principal engineer is

The title is new to most people hiring for it.

A senior member of your team, part-time

  • Embedded in your ritualsIn your Slack, your RFCs, your design reviews and your incident retros, on a fixed weekly rhythm.
  • An owner of technical directionAccountable for architecture decisions, written down as RFCs and decision records your team can follow.
  • A multiplier for your engineersSuccess is measured by how well your team decides once I’m gone.
  • Hands-on where it countsPrototypes the risky part, pairs on the hard migration, reviews the code that matters.
  • Outside the politicsNo promotion to protect and no team to defend. I can tell you the roadmap is technically unrealistic before it costs you a quarter.
  • Designed to endEvery engagement includes a handoff plan to an internal leader or a full-time hire.

What it isn’t

  • Not a contractorA contractor is paid for throughput against your plan. I’m paid to make the plan better.
  • Not a consultantNo report that lands and leaves. By default I stay inside the team until the decision is built and owned.
  • Not a cheaper fractional CTOI don’t manage people, budgets or the board. I own technical decisions alongside whoever does.

An engagement, from first call to handoff

  1. Week 0

    Fit call

    30 minutes, free. Your stage, your team, the decision in front of you. A clear yes or no, and if I’m not the right fit, who is.

  2. Weeks 1–2

    Listen and agree

    I read the code, join your rituals and meet the team before recommending anything. We agree the priorities, who decides what, and a named internal owner for each area.

  3. End of month 1

    First decisions, then your call

    The first decisions go through RFCs and design reviews. If you want one, you get a written assessment of your architecture with the main risks ranked. Then you decide: continue, change the hours, or stop with 2 weeks’ notice.

  4. Months 2–6

    Embed

    A fixed weekly rhythm: architecture ownership, design reviews, mentoring for the two or three engineers you pick, and hiring help. RFC reviews within 2 business days. Monthly written progress notes.

  5. Final month

    Hand off

    Decision records, runbooks and an internal owner for every area I touched. If you’re hiring my full-time replacement, I help you hire, and we can overlap so they get a proper handover.

More problems I get called in for

The homepage covers production readiness, cloud cost, tangled systems and migrations. These come up too.

  • “Technical debt keeps losing to feature work.”

    Everyone agrees it’s a problem, but it’s hard to argue for in business terms. I rank the debt by what it costs you in incidents, delivery speed and cloud spend, so the CEO and product can weigh it against features, then pay down the parts that block the roadmap first, a slice each sprint next to feature work.

  • “Every service solves the same problem its own way.”

    Auditing, data extraction and other concerns that repeat across services get built once, as a platform, which takes the work off every team.

    Story: ~50 databases, one change stream
  • “Architecture decisions stall, or go to whoever argues loudest.”

    I bring a written decision process (RFCs, design reviews, decision records) and own the hard calls with you until your senior engineers can.

    What a fractional principal does
  • “Each team decides well, but the system is drifting apart.”

    Duplicated services, conflicting data models, no shared standards. I work across all the teams: shared standards live in decision records every team can check, an internal owner in each team or domain carries them, and where teams have diverged I set the target and a path to it that doesn’t stop delivery.

    How teams follow shared standards
  • “An enterprise customer sent a security questionnaire we can’t answer.”

    I review the architecture, cloud setup and code with security in mind, including disaster recovery and backups, and help your team close the gaps due diligence would find, alongside your security lead or auditor.

    How I cover security

How it differs from the options you already know

AspectFractional principalFull-time principal hirePromote internallyConsultantContractor or dev shopFractional CTO
What you buyTechnical leadership and judgmentTechnical leadership, full-timeA leader who already knows your system and teamAn assessment or recommendationDelivery capacityExecutive leadership
Time to startDays once I have an opening; see the next opening on the homepage3–6 months to hireNowWeeks1–4 weeksDays to weeks
Owns the outcomeYes, together with a named internal ownerYesYesNo, advises and leavesOwns the tickets, not the directionYes, at the exec level
Grows your engineersCore goalYesDepends on their experienceRarelyNoThrough managers
Manages peopleNoNoUsually, yesNoNoYes
Cost shapeMonthly retainer, €4k–€8k excl. VAT, 2 weeks’ notice to stopSalary, equity, recruiting feesA raise, plus the risk of a stretch they aren’t ready forProject feeHourly or per sprintMonthly retainer
Best whenYou need senior technical directionThe work is truly full-timeSomeone is readyYou need a formal audit across many areasYou need features builtYou need a technical executive

Full profile

The short version is on the homepage; the full background is on LinkedIn (opens in new tab).

Industries
  • Financial Services & Fintech
  • Digital Assets
  • Regulated Banking
  • Cloud Infrastructure
  • AI & LLM Platforms
  • Cybersecurity
  • Ad Tech
  • Aerospace
Strengths · Leadership and delivery
  • Technical leadership
  • Turning complexity into shippable increments
  • Aligning engineering with business goals
  • Reducing time to market
  • Partnering with founders and product leadership
  • De-risking critical launches and migrations
  • Getting ready for enterprise security reviews and compliance
Strengths · Technical
  • Data architecture at scale
  • Cloud cost and scalability
  • Event-driven systems
  • Production readiness and observability
  • Disaster recovery and backups
  • Cloud & Kubernetes security (IAM, least privilege, hardening)
  • Secure design and code reviews (threat modeling, OWASP)
  • Legacy modernization and migrations
  • Infrastructure as code and change governance
  • AI agent and LLM platforms
Hands-on with
Languages
Python, Go, Java, Rust
Cloud & platform
AWS, GCP, Kubernetes, Docker, Linux
Infrastructure as code
Terraform, Atlantis, Ansible
Data & streaming
Kafka, CDC, PostgreSQL, Redis
Observability
Datadog, OpenTelemetry, Grafana, Sentry
AI
LLMs, AI agents, LiteLLM, Bifrost, MCP
Education
Bachelor’s Degree in Information Systems EngineeringUniversidad Tecnológica Nacional, Córdoba, Argentina

Common questions

Our CTO left and I’m not technical. Is this for us?

Often, yes, if what’s missing is technical direction. A CTO does two jobs: running the engineering team (people, hiring, budget, the board) and deciding how things get built. I take the second. I report to you, own the technical decisions with your engineers, and write them up in plain language so you can follow the reasoning without being an engineer. Someone still has to manage the team day to day, usually you or an engineering lead you name. Meanwhile I mentor the engineers you pick, and help you hire the next technical leader if you need one. If the urgent gap is the executive job, such as managing people or presenting to the board, a fractional or interim CTO is the better fit, and I’ll tell you so on the fit call.

I’m a stretched CTO. What actually comes off my plate?

Architecture calls and design reviews come to me first: I own them with you through RFCs and decision records, and coach your senior engineers until they can lead the reviews. Incident escalation moves to your team: I set up the alerts, runbooks and on-call rotation so incidents stop landing on you, and take part in every postmortem. I help with hiring, from defining roles to interviewing, and with investor and customer due diligence, from the architecture write-up to the technical questions on calls. People, budget and the board stay with you. I may need some of your time, mostly early on, to agree priorities and who decides what.

How do you get several teams to follow shared standards?

By making them easy to find and hard to ignore. Standards live in decision records every team can read, and each team or domain has an internal owner who carries them into its design reviews. A team that disagrees says so in an RFC. How the final call gets made depends on your culture, so we agree it in the first weeks. By default, if an RFC doesn’t settle it, I write a recommendation and you, as the engineering leader I work with, decide. Either way the decision is written down, and it applies to every team.

Can someone part-time really lead technical direction?

Yes, if the work is set up for it. Decisions happen in writing through RFCs and decision records, a named internal engineer carries day-to-day execution, and I’m never on the critical path for a release. Those three rules are in every engagement. On the days I’m not working with you, RFCs and design documents still get my review within 2 business days, and any decision that would be expensive to reverse gets a call before it’s made. Time off is announced weeks ahead and planned around your roadmap, and your internal owner keeps execution moving while I’m away. I’m not in your on-call rotation, and I don’t guarantee response times. For a severe incident, your team can call me, and I’ll join when I can, usually within my working hours. I take part in every postmortem, because that’s where the fix that stops the next one gets decided. The goal stays the same: runbooks and alerts good enough that nobody needs me at 3 a.m.

What are the risks of a fractional principal instead of a full-time hire?

There are six, and each has a guard. I’m not there every day, so RFCs get my review within 2 business days and any decision that’s expensive to reverse gets a call first. I’m not on call, so your team gets the alerts and runbooks to handle incidents without me. Knowledge could leave with me, so every decision is written down and the last month is a handoff to a named owner. My attention is shared, so I take at most two clients and never two competitors. I need real decision rights and an internal owner to work well; without them it’s a poor fit, and I’ll say so on the fit call. And per hour I cost more, but you pay for 10 to 20 hours a week, not 40, with no recruiting fees or equity.

Do you cover security?

Yes, as part of the architecture work. Threat modeling is part of design reviews, cloud and Kubernetes setups follow least privilege, and security is part of code review, guided by OWASP. I’ve hardened production environments in line with NIST and ISO 27001. I’m not a penetration tester or a CISO, though: for audits and certifications, I work alongside your security lead or auditor.

Will my team accept an outsider?

Teams accept people who make their work easier. For the first two weeks I mostly read code and ask questions. After that, the measure of success is your engineers getting better at their jobs, and they notice that quickly.

You work with other companies. What about confidentiality?

Every engagement has an NDA and a clear IP assignment: all work product I create for you belongs to you. My pre-existing tools and general know-how stay with me. I bring patterns from other clients, never their code, data or plans, and your work gets the same protection. I never work with direct competitors at the same time. Investors often introduce me to their portfolio companies; each company engages me directly, under its own NDA.

How much does it cost?

A monthly retainer, priced by the hours per week: €4,000 a month for 10 hours a week, or €8,000 a month for 20 hours a week, excluding VAT. There are no recruiting fees or equity. The first month is committed; after that you can scale the hours up or down, or stop, with 2 weeks’ notice. The work is remote, and on-site visits can be arranged, with travel billed at cost. The 30-minute fit call is free.

How do I know cost work will pay for itself?

I won’t promise savings before I’ve seen the system. What the first month gives you is a clear basis for deciding: a baseline of where the money goes, the spend that real growth needs separated from the spend that comes from the design, and the fixes ranked by expected impact. That also settles whether your engineers are right that the spend is necessary. If what I find doesn’t clearly justify the retainer, you stop after the first month.

What happens if we need more time, or less?

After the first month, scale the hours up or down, or stop, with 2 weeks’ notice. Engagements last six months at most, so the handoff is planned from day one. In rare cases, when the handoff needs more time, we can extend by written agreement. That depends on my availability, so it isn’t guaranteed.

We’re hiring a full-time principal. Will covering in the meantime create dependency, or make the hire harder?

It’s designed not to. Every decision is written down with its reasoning, and a named internal owner carries each area, so nothing depends on me personally. I help define the role and interview candidates, and I’m never a candidate for a role I’m helping you hire for. When your hire starts, we can overlap so they get a proper handover, and every decision I made stays open for them to revisit. That makes the role more attractive: they inherit the reasoning behind each decision, and can change any of it. If the search outlasts the engagement, we can extend while it’s still open, depending on my availability; if I can’t, I hand off to your internal owner and your hire picks up from the decision records.

Book a free 30-minute fit call

Bring the technical decision in front of you. You’ll leave with my opinion on it, whether or not we work together. Or write to hello@fractional-hdo.com.

Pick a time on my calendar (opens in new tab)