Senior Integration Engineer - C#, APIs & Enterprise Systems

This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Senior Integration Engineer - C#, APIs & Enterprise Systems based in Brazil. In this role, you will design, develop, and maintain enterprise-grade integrations that connect complex business applications and enable seamless data exchange across different systems. You will take ownership of integration projects from initial technical requirements and architecture through development, testing, and production deployment. Working primarily with C# and .NET, you will build REST APIs, implement middleware solutions, and develop event-driven integrations using modern technologies. You will help organizations connect critical enterprise platforms, including ERP, financial management, and document management systems. Beyond development, you will ensure integrations remain secure, scalable, and reliable through robust error handling, monitoring, and automated testing. You will also collaborate directly with customers and cross-functional engineering teams, translating business requirements into effective technical solutions. This is an opportunity to take ownership of challenging integration projects and make a direct impact on enterprise operations and customer success.