The personal website of a developer who likes to understand systems and build new things from them.

Juan Segundo Hardoy · Software Developer

[01] RECENT ARTICLES

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[02] PROJECTS

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llm-runtime-playground

Python

A clean-architecture, zero-abstraction LLM orchestrator implemented from scratch in Python. Features dynamic token budgeting, incremental summarization (pointer pattern), decoupled tool-calling loops, semantic routing, safety guardrails (PII masking & prompt injection), and a custom LLM-as-a-judge evaluation suite.
NuestroNido-Back

Python

Asynchronous REST API for NuestroNido, a collaborative household management platform. Built with FastAPI, PostgreSQL, and Supabase.
NuestroNido-Front

TypeScript

Collaborative and responsive web client for NuestroNido. Built with Next.js 15, TypeScript, and Tailwind CSS.

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[03] HOW I WORK

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Three ideas that explain how I approach a system: the real work, the business domain, and where AI belongs. Code comes after understanding the process, never before.

Field, record, model. Three languages, one pipeline: the part of the work nobody sees is the translation in the middle.

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[04] ABOUT

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I build software to solve real problems: applications, backend systems and infrastructure for daily operations. Experience, education and CV, on a single page.