Freelancer profile translated to English.
Back to original languageAbout Jesus
Senior Developer specializing in Delphi, PHP, and JavaScript, with over 20 years of experience creating custom solutions for companies in critical sectors such as banking, healthcare, and industry.
I develop Windows desktop applications (Delphi + Firebird), full-stack web platforms (PHP, JavaScript, jQuery, Angular, HTML), APIs, and robust backend systems based on MySQL and Oracle.
I also have experience in system integration, data synchronization between servers, industrial automation (IoT), and regulatory compliance in invoicing (VeriFactu – AEAT).
My focus is on delivering stable, secure, and business-adapted solutions, maintaining clear communication and reliable delivery times.
If you need to modernize a system, create an application from scratch, or solve complex architectural problems, I can help you.
✅ Services I Offer
*Software Development*
Creation of desktop applications with Delphi + Firebird
Full-stack development in PHP + JavaScript (jQuery / Angular) + HTML
Design and implementation of scalable REST APIs and backends
Migration and modernization of legacy systems
Integration and Databases
Data synchronization between servers
Integration with external systems
Optimization of MySQL, Firebird, and Oracle databases
Invoicing and AEAT
Implementation of the VeriFactu system
Integration with invoicing and accounting solutions
**Sectoral Solutions*
Applications for the banking sector (experience with BBVA)
Software for the healthcare sector (Hospital Marqués de Valdecilla)
IoT automation for industry (Arduino + monitoring). Telemetry
Spanish
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- JGSOFT Consultoria e Ingenieria Informática S.L.System Analyst and IT EngineerARCHITECTURE AND URBAN PLANNINGMarch 2019 - Today (7 years and 4 months)Santander, SpainAnalysis and development of systems, mainly in the construction sector. Development of real estate portals and desktop software for property management.
- Hospital Universitario Marques de ValdecillaDevelopment EngineerMEDICALJanuary 2017 - March 2019 (2 years and 2 months)Santander, SpainDevelopment of applications and evolution of existing applications. Basically applications related to the medical sector as well as support for the hospital infrastructure (administration and human resources management).
- BBVAProgrammer AnalystBANKING AND INSURANCEJanuary 1998 - December 2000 (3 years)Madrid, SpainDevelopment of electronic banking for Windows based on Delphi and Paradox, later migrated to Oracle, treasury and communications modules.
Reviews
Recommendations
Be the first to recommend Jesus
Help this freelancer shine by sharing your experience working together.
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Technical Engineer in Systems InformaticsUNED2000IngenierÃa en Informatica de sistemas
- Psychology GraduateUNED2025