See opportunities you may be missing
Find ways to improve operations, create new services or remove bottlenecks. I translate technical possibilities into business choices you can evaluate.
Fractional CTO for CEOs & decision makers
Your CTO.Your nextmove, made clear.
I’m Guillermo Quiros. I help business leaders understand what technology can do for them, spot opportunities they may be missing, and turn them into a practical strategy. When it’s time to deliver, I lead your team, bring mine, or build the team you need.
Many companies don’t need a full-time CTO. Get the expertise you need, with a commitment that fits the work. Start with a trial.
20+years leading engineering
100+engineers led
4continents
2products founded
Products and platforms delivered for
MGM RESORTSROYAL CARIBBEANCARNIVALLOBUSCOACHSAFELYK8STUDIOUXXU
Why a fractional CTO
Make confident decisions.Keep your options open.
You don’t need to be technical to make good technology decisions. You need an experienced partner who understands your business and helps you see the options, costs and trade-offs.
CTO expertise without a full-time role
Many companies need senior technology guidance, but don’t have enough ongoing CTO work to justify a full-time hire. A fractional CTO is a more efficient use of budget: get experienced leadership for key decisions and delivery, with a level of involvement that matches the work.
Start small, test the fit
Begin with a free conversation, then an agreed trial period. We define the scope, fees and exit terms upfront so you can evaluate working together before deciding to continue.
A flexible service engagement, without an employment contract. A CTO by your side when you need one.
Explore the fit — freeHow we work together
Your business first.A clear path to delivery.
We start by listening to you and the people who know your business. The strategy and level of support follow from what you actually need.
- 01
A free stakeholder conversation
You and your key stakeholders share your goals, challenges and current setup. Together we explore opportunities and where I could make a useful contribution. No technical preparation needed.
- 02
A tailored strategy and trial
We agree on priorities, a practical roadmap and how to measure progress. Before the trial begins, we define its duration, scope, fees and exit terms. Then we see how well we work together.
- 03
The right team to implement it
I direct your existing team, bring my team, or help recruit and organise a new one. I stay involved in decisions and delivery, using AI where it makes business sense.
Selected work
Built in production.Proven in the market.
Examples of turning business needs into working technology, from client projects to products I founded and led.
01 · AI AGENTS / EDUCATION & SAFETY
We turned a video course into a private tutor for every coach.
CoachSafely trained youth coaches the way most organisations still do: a library of course videos, watched once, and half-remembered by the time it actually mattered on the field. If a coach faced a situation the video did not cover, there was nobody to ask.
We built an AI agent that learned the entire course and the underlying health and safety protocols, then delivered it through a mobile app connected to our own model. The agent holds conversation history, so it knows what each coach has already covered and adapts to them over time.
The result is not a chatbot bolted onto a course. Every coach now has a private teacher who is available at any hour, answers questions about the specific situation in front of them, and stays grounded in the organisation's own protocols rather than guessing.
Visit CoachSafelyBefore
- Fixed library of course videos
- Watched once, recalled poorly
- No way to ask a follow-up question
- Identical content for every coach
After
- Conversational AI tutor in a mobile app
- Remembers each coach's history
- Answers any real situation, on the spot
- Adapts to the individual coach
24/7coaching support
1:1tutor per coach
Protocolgrounded answers
02 · AI AGENTS / INTERNAL OPERATIONS
Enterprise operations assistant
One assistant that queries the whole company, and acts on it.
Every department had its own system, and every system had its own learning curve. Answering a routine question meant knowing which tool held the data, having access to it, and knowing how to get it out. Most people did neither, so requests queued behind the few specialists who did.
We built an agent connected directly to the company database, its documents, and its recorded customer conversations. It answers questions in plain language across all three, and it does not stop at answering. It executes actions back in the underlying systems.
Nobody has to learn the software any more. An employee describes what they need and the agent does the rest, which removes software training as a bottleneck and multiplies what one person can get through in a day.
Before
- Data siloed across separate systems
- A training course per tool
- Requests queued behind specialists
- Answers took hours or days
After
- One assistant across database, docs and calls
- Plain language, zero training
- Employees act directly, without gatekeepers
- Answers and actions in seconds
1interface for every system
0software training needed
Liveactions, not just answers
Products I built and shipped
03 · PRODUCT / AI + DEVTOOLS
✣ K8Studio
An agent-free Kubernetes IDE built for how engineers actually work.
I founded K8Studio and led product and technology from idea to a cross-platform desktop product: multi-cluster operations, CloudMaps, security, observability, Helm, ArgoCD, and an AI copilot in one local-first workspace.
8,000+engineers reached
3desktop platforms
0in-cluster agents
04 · PRODUCT / AI + ARCHITECTURE
UxxU
Turning software diagrams into a living architecture model.
I created UxxU to connect C4 systems, containers, components, and dependencies in one collaborative workspace. Architecture becomes navigable, measurable, embeddable, and usable by AI through MCP and code-to-C4 workflows.
C4connected model
Livecollaboration
MCPAI workflows
VizExplorer
Legacy platform to modern microservices, with the org rebuilt around it.As VP of Software Development I led five cross-functional teams (100+ people) replacing a legacy Flex stack with Angular, React and HTML5, and migrating the backend to microservices. Platforms used by MGM Resorts, Royal Caribbean and Carnival.
100+engineers led
5cross-functional teams
3global enterprise clients
Lobus
Multi-tenant SaaS architecture built to scale without rewriting it later.Advisor and Chief Solution Architect: multi-tenant platform architecture, scalability, performance and security, data aggregation, and hands-on technical mentoring across Node, React, Angular, TypeScript and Python.
Multitenant platform
1yr 9mengagement
USmarket delivery
Services
The support you need,where you need it.
These are the ways I can help. We choose the right combination after understanding your goals, your team and your budget.
Technology strategy & opportunities
Understand what is possible and choose the investments that support your business goals.
- Opportunity and technology assessment
- Priorities, budgets and roadmap
- Build, buy or partner decisions
What you getA strategy tailored to your business.
CTO support for decision makers
An experienced technical partner alongside you in leadership, technical and vendor meetings.
- Preparation and meeting attendance
- Ask vendors the right questions
- Explain proposals, costs and trade-offs
What you getMake informed decisions with someone in your corner.
Team leadership & delivery
Turn the strategy into work with clear ownership and the right people.
- Direct and support your existing team
- Deliver with my team
- Recruit and organise a new team
What you getA team equipped to carry the plan through.
Architecture & technology review
Assess the systems you rely on and plan improvements around your priorities.
- Platform and architecture review
- Cloud, security and cost assessment
- Modernisation and integration planning
What you getA practical path to more reliable systems.
AI & process automation
Apply AI where it solves a useful business problem and the investment makes sense.
- Feasibility and return on investment
- Workflow automation and integrations
- AI assistants, evaluation and oversight
What you getUseful automation with clear business purpose.
Let’s find where I can help.
Start with a free conversation. Agree a trial before an ongoing engagement.
Let’s talk — freeField notes
All articles Thinking in public.
C4 Models Are Brilliant. AI Coding Is Breaking Them.
Why software architecture needs a living connection to the code that AI is changing.
Read article
Think Twice Before Installing Agents in Kubernetes
The hidden security and operational trade-offs behind convenient infrastructure tooling.
Read articleWhy We Built Google Maps for Kubernetes
What it takes to turn thousands of workloads into a product engineers understand in seconds.
Read articlePrivate EKS with Cloudflare Zero Trust WARP
A practical approach to secure private cluster access without creating operational drag.
Read article
Available for selected engagements
About Guillermo
Executive judgment.Builder's instinct.
I’m Guillermo, your fractional CTO. I bring 20+ years as a technology executive, architect and product founder to help you see the opportunities, make confident decisions and turn your strategy into working products and systems.
I've led engineering organisations of 100+ people across the US, Europe, Australia and New Zealand, delivering production platforms for global brands including MGM Resorts, Royal Caribbean and Carnival.
I founded UxxU and K8Studio, so I know what it costs to build and ship a product, not just advise on one. I work comfortably from board strategy down to production architecture.
Before we talk
A few practical questions.
What is a fractional CTO?
An experienced technology leader who works with your business for an agreed amount of time. I help set direction, support decisions and lead implementation, with a commitment that fits your needs instead of a full-time executive role.
Do I need technical knowledge?
No. I work with CEOs, founders and decision makers who want to understand their options. I explain what is possible, what it costs and what the trade-offs are in plain language.
How does the trial work?
We start with a free stakeholder conversation. If there is a fit, we agree a trial period with a defined scope, duration, fees, success criteria and exit terms before work starts. At the review point, we decide whether to continue. The free conversation is separate from the trial; trial pricing is agreed in the proposal.
When is a fractional CTO more efficient than a full-time hire?
When you need senior judgment and leadership but not a full working week of CTO responsibilities. You can concentrate the engagement around strategy, important decisions and delivery, then adjust the involvement as your needs change. If the business needs continuous executive ownership every day, a full-time CTO may be the better fit.
How much does it cost?
The fee depends on the scope and level of involvement you need. The fractional model gives you access to senior CTO experience without funding a full-time position. We agree the cost upfront, including any implementation team costs.
Can you work with our team, or provide one?
Both. I can direct and support your existing team, work alongside your CTO with a defined remit, bring my team, or help you recruit and organise a new one. We choose the setup that suits the work and your budget.
Can you join technical and vendor meetings?
Yes. I help you prepare, attend meetings with you, ask the technical questions, evaluate proposals and explain the implications so you can make an informed decision.
Is this mainly about AI?
No. The focus is your business and the technology leadership it needs. AI and automation are services we can use when they offer a practical benefit, alongside strategy, architecture, team leadership and delivery.
Start with a free conversation
Let’s talk aboutyour business.
A free 30-minute conversation for you and your key stakeholders. Tell me what you want to achieve, what’s getting in the way, or which decision you need help making.
What we’ll cover
- Your goals, challenges and current team.
- Opportunities technology could open up for your business.
- Where my experience could help and what a first step could look like.
- Whether a trial engagement makes sense for both of us.
The conversation is free, with no obligation to hire me. Any paid work and trial terms are agreed separately before we start.
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