Open to opportunities

Alessandro User

@alessandrouser3

Message

Full-stack engineer shipping end-to-end production systems across Python, TypeScript, and React.

Costa Rica

Message

What I'm looking for

I’m looking for a team where I can own end-to-end product delivery—building REST APIs, full-stack web apps, and reliable deployment (Docker + CI/CD). I want to ship real user features and keep pushing independent ML/LLM-enabled engineering.

I’m a full-stack software engineer and Computer Science student who ships production systems end to end. I build across Python, TypeScript and React, designing REST APIs and relational databases, then deploying with Docker and CI/CD—owning the work from requirements through deployment.

Recently, I built and shipped a university workload management platform (React 19 + TypeScript SPA, Vite, Material UI, client-side PDF export) and implemented a framework-less REST API in PHP 8.4 on Oracle with layered architecture, token authentication with refresh-token rotation, bcrypt, and rate limiting. Before that, I developed a QR-based electronic access-control system and delivered a data-driven agricultural price platform with Django and PostgreSQL, including data cleaning/normalization pipelines and interactive visualizations. I also freelance for 10+ client sites—handling the full delivery cycle—and I back my engineering with independent ML research, including an empirical ML study on double descent and an LLM-in-the-loop graph conjecturing engine.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack Developer – SIGECAT

Current

Universidad de Costa Rica

Jan 2026 - Present (6 months)

Built a full-stack workload management platform for an academic assistance program, including a React 19 + TypeScript SPA with client-side PDF export. Designed a layered REST API in PHP 8.4 on Oracle with token auth (refresh rotation), and implemented Dockerized development with CI lint/build/PHPStan checks on pull requests.

React 19 TypeScript Vite Material UI PHP 8+Oracle REST APIs Refresh Token Rotation Bcrypt Docker CI CD Linting PHPStan Git

Current

Freelance Web Developer

Current

Independent Costa Rica

Jan 2022 - Present (4 years 6 months)

Designed, built, and shipped websites for 10+ clients across legal, hospitality, and e-commerce, owning delivery from requirements through deployment. Delivered mostly React-based front ends and managed full project execution.

React Web Development Client Delivery

Software Engineer

ECCI Control – Universidad de Costa Rica

Jan 2024 - Jan 2025 (1 year)

Built a QR-based electronic access-control system for an academic assistance program, replacing manual sign-in with a secure, traceable digital process. Gathered requirements via interviews with students and faculty and delivered the deployed system.

Requirements Gathering

Software Engineer

Deferia.cr (UCR x FAO)

Jan 2023 - Jan 2025 (2 years)

Built a data-driven platform on CNP agricultural price data using Django and PostgreSQL, including data cleaning/normalization pipelines and interactive visualizations. Developed the platform end to end for deployed use.

Django PostgreSQL Data Cleaning Data Normalization Data Pipelines