Pablo Alonso
@pabloalonso
Senior backend developer specializing in scalable Java and Python systems.
SpainWhat I'm looking for
I am a backend engineer with 3+ years designing and delivering production-grade systems using Java/Spring Boot and Python/FastAPI, focused on performance, scalability, and end-to-end ownership. I have reduced API response times by 80%, built containerized CI/CD pipelines with Docker and Kubernetes, and shipped AI-powered tools and real-time dashboards.
My experience spans startups, enterprise and academic environments where I architect microservices, define data models, and implement secure stateless authentication. I enjoy building production-quality backends, optimizing systems for reliability and observability, and contributing to architecture and operational excellence.
Experience
Work history, roles, and key accomplishments
Senior Backend Developer
Digital Recycling
May 2025 - Present (10 months)
Designed and implemented Spring Boot REST APIs and containerized deployment pipelines, reducing average response times by 80% and enabling zero-downtime releases; developed real-time Python dashboards for operational monitoring.
Junior Backend Developer
Ditay Media
Jun 2024 - Oct 2024 (4 months)
Built and extended ERP/CRM modules in Python and delivered custom integrations for multiple clients; designed real-time BI dashboards with Power BI and documented reusable system architectures.
Developer & Research Assistant
Universidad Complutense de Madrid
Jan 2023 - Dec 2023 (11 months)
Developed an Android Kotlin app and PHP backend for real-time biometric data ingestion, participated in ML model development for pattern detection, and led codebase migrations to improve maintainability.
Education
Degrees, certifications, and relevant coursework
42 School Madrid
Software Engineering, Software Engineering
2024 - 2025
Project-based software engineering programme focused on systems programming, algorithms, network protocols, and collaborative development.
CES Afuera, Madrid
Advanced Diploma, Multiplatform App Development
2019 - 2023
Advanced Diploma in Multiplatform App Development with a focus on full-stack development and specialisation in Big Data and distributed data systems.
Tech stack
Software and tools used professionally
Availability
Location
SpainAuthorized to work in
Website
pabalons.comPortfolio
pabalons.comSocial media
Job categories
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