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Guillermo F
@guillermoferras
Senior Software Engineer
Spain
Spanish
About me
I am a software engineer with over 15 years of experience, focused on backend development with Java and the Spring ecosystem. I specialize in API design, systems integration, and mission-critical applications across FinTech and public sectors. I leverage AI tools as a productivity multiplier to deliver full-stack solutions and high-quality code.
Skills
Guillermo F
Offline •
See my services
Bug Fixes
I will fix bugs and do quick tasks in your java spring backend
Database Development
I will write, fix and optimize your sql and postgresql queries
Work experience
Senior Software Engineer
Monetum
Jul 2021 - Present • 5 yrs 3 mos
B2B FinTech platform (IBAN accounts, SEPA payments, Open Banking, API access). I started as a full-stack developer: Java / Spring backend plus the frontend, first with Angular and later migrating to React with the help of AI tools. Today I am the only developer of the system and I handle its evolution and maintenance end to end: REST and SOAP APIs, integrations with banks and payment providers, PostgreSQL databases, JasperReports, deployments and production support.
Software Engineer
Capgemini
Nov 2017 - Jun 2021 • 3 yrs 7 mos
International engineering consultancy (now Capgemini Engineering). Java enterprise applications for the public administration of Catalonia, used daily by a large number of users, in Scrum teams: Feina Activa (public employment platform) and Galileu (management of public employment and training programs). New features, evolution towards modern Java architectures, technical analysis of incidents and maintenance.
