SL/

00 / Introduction

Senior .NET Backend Developer

SammyLastre Silveira.

Senior .NET Backend Developer with 5+ years of experience building and modernizing secure, event-driven production systems with C#, ASP.NET Core, Azure, and SQL Server.

At a glance

5+
years building production backend systems
3
Microsoft Azure certifications
E2E
ownership from design through production support
Professional experience

01 / Experience

Professional experience.

Backend engineering in production systems, with responsibility for delivery and support.

01

Nov 2023 - Present

Senior Backend Developer

Tarlogic

  • Cut CI/CD pipeline execution time by approximately 50% while strengthening automated test suites with xUnit.
  • Migrated two business-critical applications to .NET 8 and .NET 10, preserving vendor support and reducing technology obsolescence risk.
  • Evolved and maintained dozens of backend services across microservice and modular-monolith projects, including asynchronous communication through Azure Service Bus.
  • Built secure APIs and integrations for core systems, partners, and AI providers using ASP.NET Core Identity, cookie authentication, and a custom 2FA access flow; migrated sensitive data to encrypted-at-rest storage.
  • Evaluated, selected, and justified Azure resources for specific solutions while applying Clean Architecture, Vertical Slice Architecture, CQRS, structured logging, health checks, and monitoring dashboards.

C# · .NET 8/10 · ASP.NET Core · Azure · xUnit · CI/CD

02

Aug 2022 - Nov 2023

Software Engineer

Miratech

  • Led the migration and development of a business-critical debt-collection application from legacy technology to .NET Core.
  • Designed dozens of SQL Server integrations and automations connecting internal tools and external systems.
  • Optimized data pipelines, complex T-SQL queries, and stored procedures to reduce server load and improve large-volume processing.
  • Partnered with QA, stakeholders, and engineers in an Agile environment to deliver stable APIs and production features.

.NET Core · SQL Server · Integrations · Modernization

03

Feb 2021 - Aug 2022

Application Development Associate

Accenture

  • Automated dozens of back-office workflows for bulk processing, reducing repetitive manual work and operational effort for a utilities-sector client.
  • Built production data-processing pipelines and system integrations with C#, SSIS, SQL Server, and T-SQL.
  • Optimized SQL functions, stored procedures, batch jobs, and reporting workloads for more efficient execution.

C# · SSIS · SQL Server · T-SQL · Automation

02 / Capabilities

The tools behind the work.

A working stack, grouped by where I use it.

01

Backend

C# · .NET 8/10 · ASP.NET Core · Entity Framework Core · REST APIs · Authentication & Authorization · Clean Architecture · CQRS · Vertical Slice Architecture

02

Azure

Azure App Service · Azure Functions · Azure Service Bus · Azure SQL Database · Azure Cosmos DB · Azure DevOps · CI/CD

03

Databases

SQL Server · T-SQL · Azure SQL · Cosmos DB (NoSQL)

04

Engineering

OpenAPI / Swagger · Git · Docker · Distributed Systems · Event-driven Messaging · Encryption at Rest · xUnit · Logging & Observability

03 / Credentials

Education and certification.

Education

Higher Technician in Multi-platform Applications Development

CIFP Txurdinaga LHII2019 - 2021

Languages

  • Spanish - Native
  • English - C1

04 / Contact

Let's talk about
the backend.

Email is the simplest way to reach me.

sammyls@proton.me