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guillesotoblanc

Guillermo S

@guillesotoblanc

Senior Full Stack Developer and Database Specialist

Costa Rica
Spanish, English
About me
Hi! I’m Guillermo, a Senior Computer Engineer with 5+ years of experience architecting high-performance enterprise software, scalable REST APIs, and mission-critical databases for the banking and SaaS sectors. Whether you need a robust backend infrastructure, complex PL/SQL optimization, or full-stack web application development, I build clean, secure, and maintainable systems tailored to your business needs.... Read more

Skills

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guillesotoblanc
Guillermo S
Offline • 
Average response time: 1 hour

See my services

API & Integrations
I will build custom rest apis and integrate billing apis
From$20 / projectMore details

Portfolio

Work experience

Grupo_Financiero Improsa

Senior Software Engineer / Database Specialist

Grupo Financiero Improsa • Full-time

Nov 2021 - Present • 4 yrs 10 mos

Designed and developed high-performance RESTful APIs in .NET Core and complex database logic in Oracle PL/SQL for banking core integrations (Oracle Flexcube). Developed modern web applications using Angular, built automated PDF report generators, and optimized transaction pipelines.

Software Developer

Corporación Informática ODS • Full-time

Nov 2019 - Nov 2021 • 2 yrs

Maintained and modernized enterprise web applications using C#, ASP.NET MVC, JavaScript, and SQL Server. Built an internal C# .NET multi-layer code generator that automated project scaffolding, significantly reducing development setup time.