Paul Mantello · Mantic Labs

    I turn AI startups into platforms enterprise buyers are willing to sign.

    12 years shipping code. 7 years of AI in production. CTO Seedext (Microsoft GenAI Studio).

    3 → 12 engineers
    in 12 months at Seedext, 0% churn
    50 → 4,500 meetings/day
    AI pipeline scaled in production on Azure
    +500% revenue YoY
    alongside ISO 27001 & SOC 2 prep
    Book a 20-min call

    Currently taking new engagements · Remote-first · Based in Toulon, France

    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 one critical hands-on initiative per quarter.

    Best for

    Startups 20-100 people, post-Series A, scaling pain

    Structuring Audit

    6 weeks · fixed fee

    Shared technical diagnosis before a VP Eng hire, a fundraise, or an architecture pivot. Actionable report, not a slide deck. A senior dev can execute it Monday morning.

    Best for

    Companies at inflection points who need clarity fast

    Staff Engineer IC

    Full-time

    When the team exists but lacks senior bandwidth to carry a critical initiative (cloud migration, AI pipeline, scalability push). I ship production code, not management layers.

    Best for

    Teams with clear direction, missing senior hands

    What I'm actually good at

    Three problems I solve well.

    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 4,500+ meetings/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.

    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.

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