Open to opportunities

Jefferson Santos

@jeffersonsantos1

Message

I build high-availability enterprise applications with .NET, Angular, and Open Finance integrations.

Brazil

Message

What I'm looking for

I'm open to relocating to Portugal with visa sponsorship, where I can build and modernize high-availability enterprise applications using .NET, Angular, APIs, and clean architecture.

I'm currently building secure Open Finance integrations for a Top 4 Brazilian retail bank at Capgemini, contributing to API integration, data processing, and production reliability in a high-availability environment.

At GFT Technologies, I built B2B and B2C telecommunications applications supporting more than 7,000 concurrent users. I reduced latency in a critical workflow from 12–13 seconds to 1.2 seconds through refactoring, query analysis, and application optimization.

I've also modernized legacy Java and Angular applications at CONNEMAT and delivered business-critical healthcare systems at AR Sistemas, helping keep diagnostic workflows available during COVID-19 demand surges.

Experience

Work history, roles, and key accomplishments

Current

Senior .NET & Angular Software Engineer

Current

Capgemini

Apr 2026 - Present (5 months)

Develop and maintain secure Open Finance integrations for a top Brazilian retail bank using Java, Angular, MongoDB, and REST APIs. Contribute to high-availability financial environments, focusing on API integration, data processing, and production reliability.