Freelancer profile translated to English.
Back to original languageAbout Francisco Javier
I am a Software Architect and founder of FjTechSols, a company specializing in the development of custom digital solutions, SaaS platforms, process automation, and Artificial Intelligence integration for businesses.
My goal is to transform ideas into robust, scalable, and growth-ready digital products. I accompany my clients throughout the entire project lifecycle, from needs analysis and architecture design to development, deployment, and software evolution.
I have experience in creating modern web applications, business management systems (CRM, ERP, and BackOffice), booking platforms, automation tools, marketplaces, and cloud-based solutions.
I work with modern technologies such as Next.js, React, TypeScript, PostgreSQL, Supabase, Node.js, and Artificial Intelligence APIs, always prioritizing code quality, performance, security, and scalability.
Spanish
Native or bilingual
English
Conversational
Can work on-site
Madrid (up to 50km)
Experience
- FjTechSolsFull-Stack DeveloperSOFTWARE PUBLISHINGJanuary 2024 - May 2025 (1 year and 4 months)Madrid, SpainDesign and complete development of web applications using the MERN stack with TypeScript, prioritizing scalability, security, and code maintainability. Implementation of accessible and responsive interfaces following UX/UI principles, using React, TailwindCSS, and Figma to deliver fluid and user-centered experiences. Development of secure RESTful APIs with Node.js, Express, and authentication with JWT and OAuth2, integrating external services like Firebase and Stripe. Progressive migration of JavaScript projects to TypeScript, improving code robustness and reducing production errors.
- El Mazo TvUX DesignerFebruary 2022 - December 2024 (2 years and 10 months)57000 Sosúa, Dominican RepublicDesigned and implemented user-centered interfaces for web applications using Figma, React, and TypeScript. Combined UX research, prototyping, and usability testing with frontend development using TailwindCSS and reusable design systems. Improved accessibility (WCAG), performance, and user experience in dashboards, SaaS, and interactive tools, ensuring consistency between design and code.
- JMTv Canal 12Technical DirectorJanuary 2018 - October 2021 (3 years and 9 months)57000 Sosúa, Dominican RepublicIn charge of the JMTv 12 television platform, creation and management of its website, system maintenance, IT, and transmission area.
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Education
- Cybersecurity CertificateCertificado en Ciberseguridad
- CYBERSECURITY MANAGEMENT IN SMES. SECURE E-COMMERCEUniversidad Hacking.GESTIÓN DE LA CIBERSEGURIDAD EN PYMES. COMERCIO ELECTRÓNICO SEGURO