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Cassio Leite

@cassioleite

Message

Senior full-stack .NET engineer specializing in microservices and cloud-native systems.

Portugal

Message

What I'm looking for

I seek senior engineering roles focused on cloud-native microservices, CI/CD automation, and robust, observable systems in teams that prioritize architecture, collaboration, and measurable impact.

I am a senior software engineer with extensive experience building and maintaining backend and full-stack systems using C#, .NET, SQL Server, MongoDB, Kubernetes, and Azure. I have led microservice architecture efforts, migrated monoliths to cloud-native platforms, integrated third-party APIs for financial and telecom domains, and implemented CI/CD pipelines to deliver reliable, compliant B2C and B2B products.

I focus on pragmatic, testable designs guided by OOP, SOLID and dependency injection principles, and I use tools like Terraform, DAPR, Grafana and Application Insights to ensure observability and resilient deployments. I seek to contribute to teams that value sound architecture, automation, and measurable business impact.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Infinint

Sep 2024 - Jul 2025 (10 months)

Maintained C#/.NET backend services and SQL Server for a B2C credit application, integrated financial partners' APIs to enable expansion into new countries, and delivered CI/CD to AKS using GitHub Actions while monitoring with Grafana and Azure Monitor.

C++.NET SQL Server API Integration Azure Kubernetes Service GitHub Actions Grafana Application Insights

Senior Software Engineer

Mind Source

Jan 2022 - Sep 2024 (2 years 8 months)

Architected and implemented C#/.NET microservices with MongoDB and Kubernetes, migrated monolithic telecom applications to microservices and on-premise solutions to Azure using Terraform, and maintained CI/CD with GitHub Actions and Jenkins.

C++.NET Microservices MongoDB Kubernetes Azure Terraform GitHub Actions Jenkins

Software Engineer

paySimplex

Mar 2019 - Jan 2021 (1 year 10 months)

Developed C#/.NET and SQL Server backend for a mobile parking payment app and B2B systems, integrated partner APIs for city expansions, maintained legacy .NET MVC apps, and built dashboards with Vue.js and .NET APIs.

C++.NET SQL Server Azure API Integration Vue.Js MVC Backend Development Monitoring

Software Engineer

BHS

Jan 2018 - Feb 2019 (1 year 1 month)

Maintained and enhanced an online rental car system for a leading LATAM company using C#/.NET and SQL Server, developed secure file-access and call-center rental systems with Angular and Azure.

C++.NET SQL Server Azure Angular & Security Backend Development

Software Engineer

Attps Tecnologia

Dec 2014 - Mar 2017 (2 years 3 months)

Implemented and maintained fintech solutions for major Brazilian banks using C#, Web Forms, NHibernate, SQL Server and Oracle, and delivered integrated credit solutions for social security and pension companies.