Leandro Souza

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Senior .NET Backend Engineer

Apr 2023 - Jun 2025 (2 years 3 months)

• Served as backend lead for Command Center, a unified SaaS communications platform used by 10,000+ businesses to manage multichannel messaging and workflows. • Designed and implemented distributed microservices with ASP.NET Core, leveraging Azure App Services, Azure Functions, and Service Bus for resilient cloud-native architecture. • Built secure, scalable REST APIs with JWT/OAuth2 and role-based authorization, integrating with Gmail, Outlook, and enterprise chat using API Management and Azure Key Vault for secrets. • Implemented data access and domain logic with Entity Framework Core and Dapper, supporting SQL Server and PostgreSQL, and used EF Core Migrations for versioned schema evolution.

Senior Backend Developer

Newsela

Mar 2020 - Feb 2023 (3 years)

• Developed RESTful APIs and backend services in .NET Core and Entity Framework Core for classroom dashboards, content management, and assessment features. • Managed database schema evolution and data integrity using EF Core Migrations and automated backup strategies on Azure SQL. • Built multi-role access control and permission layers, supporting secure and differentiated content delivery across K–12 institutions. • Automated data imports, reporting, and grading using Hangfire and Redis, improving scalability and user experience during peak load. • Enhanced query performance with Dapper for high-throughput operations, added caching with Redis, and optimized indexing for critical endpoints. • Integrated logging, monitoring, and tracin

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Backend Developer

Unimed Recife

Jun 2016 - Dec 2019 (3 years 7 months)

• Developed APIs for appointment scheduling, patient records, and billing using C#/.NET and Entity Framework, supporting clinical operations across multiple locations. • Designed database schemas, performed migrations, and ensured high data consistency and availability with SQL Server and PostgreSQL. • Integrated third-party insurance and regulatory APIs, applying strict validation, error handling, and data protection. • Automated recurring tasks and claims processing using Hangfire and background workers, reducing manual workload and operational risk. • Improved deployment pipelines and infrastructure consistency with Docker and Azure Resource Manager templates.

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Junior Web Developer

NAJAR

Oct 2015 - Apr 2016 (7 months)

• Assisted in developing promotional and campaign websites using HTML, CSS, JavaScript, Bootstrap and jQuery, contributing to visually engaging brand activations. • Learned to translate visual mockups into clean, accessible code and supported iterative changes during fast paced delivery cycles. • Participated in cross-disciplinary planning sessions and supported site testing, launch, and handoff.

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