About us - Strategic leadership for early-stage product teams
The Fractional Stack is a technology advisory firm led by a senior engineering leader with over 15 years of experience. We partner with startups and growing companies as a fractional CTO to build technical strategy, scalable infrastructure, and high-performing engineering teams.
We've helped healthcare startups launch compliant platforms, reduce triage workloads with AI, and prepare technical orgs for scale. Whether it's evaluating build vs. buy, hiring your first engineers, or preparing for diligence — we bring clarity and momentum to your technical decisions.
Our engagements are lean, focused, and built around real outcomes — not headcount. You get executive-level guidance, without the full-time overhead.
- Years in engineering leadership
- 15+
- Triage workload reduced with LLMs
- 50%
- Teams scaled across funded growth
- 3x
Meet the Founder
Thiago is a senior engineering leader with over 15 years of experience building scalable, secure, and efficient software systems across industries like healthcare, insurance, and SaaS. As the founder of The Fractional Stack, he brings hands-on CTO expertise to early-stage companies looking to move fast without compromising quality or compliance.
Before launching The Fractional Stack, Thiago led engineering at a healthcare startup, where he architected a HIPAA-compliant platform and built an LLM-powered triage system that reduced operational load by 50%. He's passionate about helping teams scale their technology and engineering culture without creating unnecessary complexity.
You can learn more about his personal projects and writing at tsiqueira.com.
Our values - We bring technical clarity, strategic guidance, and scalable systems.
At The Fractional Stack, we help early and mid-stage companies make smarter technology decisions — from infrastructure to hiring.
- Clarity. We translate complexity into clear, actionable decisions — helping founders and teams move forward with confidence.
- Adaptability. Every team is different. We adjust our approach to fit your people, product, and pace — not the other way around.
- Pragmatism. We recommend what works — not what's trendy. Our guidance is grounded in stage-appropriate strategy and real-world tradeoffs.
Let’s make your next technical move the right one.
We help teams avoid costly mistakes and move forward with confidence.