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Coding
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Coding
  • Opellio Software
  • Buenos Aires

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santiagolovisotto/README.md

Hi, I'm Santiago Lovisotto

Backend developer based in Buenos Aires, Argentina. Java, Spring Boot and PostgreSQL.

I build REST APIs, scalable architectures and SaaS products from scratch.

How I work

I design with hexagonal architecture and SOLID: the domain sits at the center and knows nothing about the database, the framework or the caller. That keeps systems easy to test and cheap to change. I write clean code because it is written once and read many times, usually by someone else on the team.

I work on Debian, from the terminal. I'm a strong believer in free and open source software and a big fan of the GNU project.

wakatime


Technical Skills

Main stack

  • Language: Java
  • Framework: Spring Boot
  • Persistence: PostgreSQL, Hibernate (JPA)
  • APIs: RESTful design, Swagger/OpenAPI
  • Security: JWT, OAuth 2.0

Architecture & Quality

  • Hexagonal Architecture, Microservices, Design Patterns
  • SOLID principles, Clean Code
  • Unit Testing, Scrum, eXtreme Programming (XP)

Tools & Infrastructure

  • Git, GitHub, Docker, Postman
  • Linux (Debian), VPS deployments

Also worked with

  • C# (.NET 8 / ASP.NET Core), SQL Server, Entity Framework

Experience

Software Developer (Freelance)

Opellio Software, Buenos Aires | June 2025 - Present

  • Designed and deployed a multi-tenant SaaS for appointment management. In its first month in production it processed over 120 bookings for 4 real B2B clients.
  • Integrated the MercadoPago API for automated deposit collection: over 40 successful transactions in the first month.
  • Built the backend for e-learning, real estate and online store systems using hexagonal architecture.
  • Implemented authentication and authorization with JWT and OAuth 2.0.
  • Use LLMs in my workflow for PR reviews, query optimization and test generation.

Education

Universidad Nacional Arturo Jauretche (UNAJ) Software Engineering | Mar 2023 - Nov 2027 (expected) 4th year, 69.57% completed. Focused on programming, data structures, algorithms, networks, databases, operating systems and software development.

Universidad FASTA Pedagogical Training for Technicians | Mar 2023 - Nov 2024 Qualifies me to teach technical subjects at secondary level.

UTN FRBA e-Learning Center University Expert in Ethical Hacking | Nov 2019 - May 2020 Network topology, Linux administration and information security fundamentals.

Instituto San Juan Bautista Electromechanical Technician | Mar 2016 - Nov 2022 Technical secondary school: electricity, electronics, mechanics, technical drawing/CAD and industrial automation.

English: C1 Advanced (EF SET, 65/100)


Get in Touch

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  1. Restaurante_PS_Lovisotto_Santiago Restaurante_PS_Lovisotto_Santiago Public

    C#

  2. PS-Grupo-3/EventService PS-Grupo-3/EventService Public

    Microservicio correspondiente al servicio de eventos.

    C# 3

  3. Stock-System Stock-System Public

    Stock System es una aplicación desarrollada en Java con PostgreSQL para la gestión de stock y facturación en comercios (kiosko, almacén, farmacia, heladería). Su objetivo es facilitar el control de…

    Java 2

  4. SayIt SayIt Public

    A desktop app that helps users improve their English-speaking abilities through targeted phrase generation, TTS integration, and voice recognition. Get real-time feedback on pronunciation accuracy …

    Java 1