Open to select engagements · Vienna / remote

Backends that don't
buckle under scale.

I'm Biagio, a Lead Backend Engineer who turns tangled systems into clean, observable, production-grade architecture. Python, Django, FastAPI and LLMs are my daily bread.

Currently Lead Engineer @ Complexio· Founder @ letsrevel.io· Previously Keyring · Cytora · Black Tusk · Uni Bologna
10+
years shipping backends in production
<100MB
RAM for an LLM service I rebuilt from scratch
2×
PyPI libraries published & maintained
1st
place, UN SANKOFA · Best Paper, ICEGOV '23
// the short version

From courtroom to codebase.

I trained as a jurist (a degree in criminal law, summa cum laude), but I'd been coding since 13 and eventually coded my way out of law entirely. Became a judge? Hell no.

Since then I've shipped through the web3 and legal-tech trenches, built eHealth / FHIR servers, and put production LLMs to work in commercial insurance. Today I lead a team automating everything in sight, and I maintain open-source software without compromises.

I care about clean architecture, ruthless testing, and shipping things that hold up at 3 a.m. Frontend? I delegate. 🙂

At a glance

RoleLead Backend Engineer
BasedVienna, Austria
FocusAPIs · LLMs · Infra
Languages🇮🇹 · 🇬🇧 C2 · 🇩🇪 B2
Open sourceAlways
// the toolkit

God-mode stack.

The tools I reach for without thinking, plus the broader kit I bring when a project needs it.

Core & Backend

PythonDjangoFastAPI FlaskREST · GraphQLPydanticCelery

AI & LLMs

OpenAI · Claude · GeminiRAG · Embeddings Pydantic-AILangChainMCP · Agents

Data & Infra

PostgreSQLRedisDocker AWSElasticsearchNeo4jOpenTelemetry
// the track record

Where I've shipped.

Since 2026

Lead Engineer · Complexio

Leading a team building enterprise AI automations. Juggling LLMs and automating everything in sight.

Since 2025

Founder & Lead Engineer · letsrevel.io

Building and maintaining awesome FOSS without compromises. Django, Postgres, Redis, Docker, the usual suspects.

2024 to 2025

Lead Backend Engineer · Keyring

Rewrote a core backend from spaghetti to clean, scalable Django for zero-knowledge regulatory infrastructure.

2024

Senior Backend Engineer · Cytora

Core dev on the LLM team in commercial insurance. Rebuilt the LLM service to run in under 100MB RAM. Not a joke.

2022 to 2024

Senior Backend Developer · Black Tusk

Production FHIR servers and eHealth systems with Django & FastAPI. Test coverage was a religion.

// let's talk

Got a backend that deserves better?

I'm selective about what I take on, but if it's interesting and hard, I'm listening.