Paul Mantello · Mantic Labs
I put AI to work inside enterprise
12 years building solutions. 7 years of AI in production. CTO / Staff Engineer, worked at Microsoft GenAI Studio, Station F, Y Combinator.
Remote-first · Wordwide availability · Travel possible
Worked with teams at
How I work
Three formats. Pick what fits.
I don't sell hours. I take on a problem until it's solved.
Fractional CTO
2-3 days/week · 3-month minimum
For founders without a CTO, or with a CTO solo under water. I own team structure, tech roadmap, and push one critical initiative to production.
Best for
Companies that need experienced technical leadership without committing to a full-time CTO hire
Structuring Audit
3 weeks · fixed fee
Technical and organizational audit for companies preparing a critical transition: fundraising, scaling, architecture redesign, leadership hiring, or technical restructuring.
Best for
Companies that need rapid clarity on technical, organizational, or scalability challenges
Staff Engineer IC
Full-time
I join as a senior individual contributor to take ownership of a critical technical initiative: cloud migration, scalability challenges, AI pipelines, complex architecture, or strategic feature development. The goal is to accelerate execution without adding management overhead, by working directly alongside the existing team.
Best for
Companies needing to quickly strengthen execution capacity on a critical technical subject
My core expertise
Three problems I solve.
Ship AI from POC to reliable production
- ·7 years deploying LLMs, RAG pipelines, STT models in prod
- ·Cost, latency and eval frameworks I've actually used at scale
- ·Honest model selection — no vendor allegiance, no hype
Proof
Pipeline LLM/RAG industrialized at Seedext, processing 5000+ AI processes/day on Azure.
Scale a tech team from 5 to 15 without breaking velocity
- ·Recruitment process, rituals, career framework, 1:1 culture
- ·Mentoring seniors, defusing the mid-growth chaos
- ·Hand-off plan so I'm not the dependency
Proof
Scaled Seedext engineering 3 → 12+ in 12 months with 0% churn.
Land your first ISO 27001 / SOC 2 certification
- ·Compliance work that unblocks CAC40 and enterprise deals
- ·Zero-trust access, secrets management, audit logging, automation
- ·Auditor-ready documentation written in engineer language
Proof
Running ISO 27001 + SOC 2 preparation at Seedext while maintaining product velocity.
Engagements
Two tracks. One level of work.
AI & Agentic Systems
Seven years of production-grade AI experience. I help companies deploy robust agentic systems integrated into real operational environments — from internal copilots and workflow automation to AI-native tooling and multi-agent orchestration.
See detailsOn-Demand CTO / Staff Engineer IC
I operate as a fractional CTO or senior Staff Engineer to lead critical technical phases: architecture, scalability, engineering organization, AI, infrastructure, or product execution. Strategic leadership, strong execution capability, and hands-on involvement from the very first days — without the overhead of a traditional executive hire.
What they say
People I've worked with.
His technical expertise is impressive, but what truly sets Paul apart is his ability to take on challenges head-on. No matter the complexity, he always finds an effective solution. He also knows how to take constructive feedback and use it to constantly perform at a high level.
A highly serious and effective engineer — his code is clean and maintainable. Very invested in his projects, Paul mentored me at the start of my engagement and was an invaluable support.
Track record
Where I've actually shipped.
Seedext
2024 — 2026
CTO
+500% revenue, team 3 → 12, ISO 27001 + SOC 2 in flight.
TeamOut (YC W22)
2024
Staff Engineer
Booking.com-style search engine, full trip planning app shipped.
La Boîte Immo
2022 — 2023
Principal Engineer
Modern stack migration, managed 6 engineers.
Naval Group
2018 — 2022
Senior Software Engineer
AI-driven predictive maintenance for the French Navy.
Sopra Steria
2015 — 2018
Web Developer
Enterprise application management for Tier 1 clients.
FAQ
Common Questions
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