Portfolio

Senior Backend Developer · PHP · Python · AI

Jairo Jiménez Pruñanosa

Over five years building APIs and critical platforms with PHP and Python, applying clean architecture and driving the responsible adoption of AI in development teams.

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Portrait of Jairo Jiménez Pruñanosa in a black suit against a grey background

Skills

What I use every day

Backend

  • PHP
  • Python
  • Laravel
  • FastAPI
  • REST APIs
  • Microservices

AI

  • Generative AI
  • Self-hosted LLMs
  • AI governance

Data

  • SQL
  • Caching
  • Elasticsearch
  • ETL and batch processing

Quality

  • SOLID
  • Clean Architecture
  • Hexagonal architecture
  • DDD
  • Testing

Infra

  • Docker
  • AWS
  • On-Premise
  • CI/CD

Experience

2 positions · 2021 → present

  • Grup Fedefarma

    Backend Developer2026 — PresentGavà, Barcelona

    I evolve the B2B e-commerce platform and the ERP that supply thousands of pharmacies, and drive the responsible adoption of AI across the team.

    • Introduced an AI-oriented way of working: centralized technical context, rules and guidelines for using generative AI responsibly.
    • Championed the exploration of self-hosted LLMs to guarantee data privacy, which is critical in the pharmaceutical sector.
    • Build with Clean Architecture and SOLID on on-premise infrastructure, in coordination with IT and DevOps.
    • PHP
    • Laravel
    • Generative AI
    • On-Premise

  • Nester

    Full-Stack and Backend Developer2021 — 2026Barcelona · Remote

    Took a property management SaaS from a legacy monolith to microservices and built its main API in PHP and Python.

    • Designed the main REST API: authentication, middleware and endpoints for several web applications.
    • Led the migration to microservices with DDD and hexagonal architecture, drastically reducing response times.
    • Deployed the infrastructure on AWS with continuous integration and delivery.
    • Python
    • FastAPI
    • PHP
    • AWS

Projects

Products and open source

Education

Degrees and certifications

  • 2019 — 2021

    Higher Technician in Web Application Development

    Institut Jaume Viladoms · Sabadell

  • Languages

    Catalan Native · Spanish Native · English B2

Contact

Shall we build together?

Open to backend projects where architecture and quality matter.