Donzelli Diaz · Vol. VI · No. 01 - A FIELD GUIDE / PORTFOLIO - MMXXVI · MILANO / BANGKOK
№ 01 FULLSTACK / AI ENGINEER - ITALY · CUBA · TH

DONZELLI

&

DIAZ

AI Engineer · Backend · Six Years in Fintech & GenAI
↳ available for senior IC roles & staff-level engagements
Continue reading ↓ I. Identity · II. Stack · III. Ledger · IV. Contact
I. Identity - a short note from the author

Began in the back-office of Italian finance, Intesa Sanpaolo, then ArcaFondi, wiring Bloomberg and Morgan Stanley feeds into Java services that had to be right by 09:00, every morning, without exception. The discipline stuck. The taste for systems that fail loudly stuck. Now the surface area is wider: Django, Next.js, Celery queues humming on DigitalOcean, and SQL-backed AI workflows stitched out of OpenAI, Mistral, and a great deal of patience.

Italian, with Cuban roots, currently building fully remote at Epiphany, a Copenhagen-based AI company. Off the clock there is a record label, a small one, run out of stubbornness more than business sense. It teaches you the same lesson a production incident teaches you: the work is the work, and nobody is coming to do it for you.

II. Stack - what is on the workbench
i.

Backend

the bones
  • Java / Spring
  • Python
  • Django
  • FastAPI
  • Celery
  • PostgreSQL
  • Redis
where the real arguments happen.
ii.

Frontend

the surface
  • React
  • Next.js
  • TypeScript
  • Tailwind
  • HTMX (occasionally)
kept honest by designers and users.
iii.

Infrastructure

the room it lives in
  • Docker
  • Terraform
  • DigitalOcean
  • GitHub Actions
  • Nginx
boring on purpose.
iv.

AI · LLM

the new instrument
  • OpenAI
  • Mistral
  • LangChain
  • SQL-first AI workflows
  • evals
product-grade, in production.
III. The Ledger - roles, in reverse chronological order
  1. 2024 -

    Epiphany

    Remote, Copenhagen HQ
    Fullstack & AI Engineer

    Shipping Django + Next.js apps, SQL-backed AI workflows and Celery-based async pipelines on DigitalOcean, turning Epiphany’s product work into reliable production systems.

    • Django
    • Next.js
    • SQL
    • Celery
    • DigitalOcean
    ← present day
  2. 2022 - 2024

    ArcaFondi

    Milano, IT
    Backend & R&D Engineer

    Worked across backend and R&D at ArcaFondi, an Italian SGR, building Java services for portfolio, market-data, and internal research workflows with Bloomberg and Morgan Stanley integrations.

    • Java
    • Bloomberg API
    • Morgan Stanley
    • R&D
  3. 2020 - 2022

    Intesa Sanpaolo

    Italy
    Software Engineer

    Built and maintained backend services for banking workflows, focusing on reliability, integrations, and day-to-day production support.

    • Java
    • Spring
    • Oracle
    • high-availability
IV. Correspondence - the door is open

If you are building something that needs a backend that won’t quietly fall over, or an LLM pipeline that won’t hallucinate your business away,

write.

replies, usually within a day