Freelancer profile translated to English.

Description

I am a Full-Stack Software Engineer specialized in creating scalable web applications, SaaS platforms, and MVPs.

My technical profile is atypical: I combine robust software architecture with a strategic business and conversion-oriented vision. I understand that software is not just code, but a tool to generate return on investment (ROI) and scale companies.

My Technical Stack (Enterprise-Grade):

Backend & Architecture: Java, Spring Boot, RESTful APIs, JWT Security.

Frontend & UI: React, JavaScript, Tailwind CSS.

Databases & Deploy: PostgreSQL, MySQL, Docker.

Business Vision (Growth & Conversion):

Real experience managing Lead Generation and Meta Ads strategies.

Development of interfaces and user flows (Funnels) optimized to maximize acquisition and retention.

Whether you need to build a Minimum Viable Product (MVP) from scratch, a complex admin panel, or a complete SaaS platform, I handle the entire development lifecycle.

Shall we talk about the architecture of your next project?

Industry field of expertise

Languages

Spanish
Native or bilingual
English
Fluent

Workplace preferences

Remote only

Primarily works remotely

Freelance
Full-Stack Software Engineer
October 2024 - Today (1 year and 8 months)
Madrid, Spain
Architecture and integral development ofcustom web applications**, **SaaS platforms, and MVPs**. Design of modern interfaces optimized for conversion in the **Frontend(**React, JavaScript, Tailwind CSS**). Creation of robust, secure, and scalable architectures in theBackendusing **Java**, **Spring Boot**, REST APIs, relational databases (PostgreSQL/MySQL), and deployment with **Docker**.
Docker React.js Spring boot JavaScript Java
Stormforce
Commercial Management & Marketing
January 2026 - May 2026 (4 months)
Madrid, Spain
Commercial relationship managementand development ofB2B acquisitionstrategies. Implementation of digital marketing solutions, conversion funnel optimization (**Lead Generation**), and market analysis to scale customer acquisition.
Meta Ads Meta Social Networks Instagram Marketing Facebook Marketing

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Higher Technician in Web Application Development (DAW)
Centro de Formación Profesional CCC
2026
Técnico Superior en Desarrollo de Aplicaciones Web (DAW)
Baccalaureate in Science and Technology
IES Celestino Mutis
2024
Bachillerato de Ciencias y Tecnología

Javier Santamaría Martín

Full-Stack Developer | Java & React

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