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Leega

Senior .NET Developer, Backend

Leega

. Work on the evolution of critical systems .

Posted 10/19/2026full-timeSão Paulo • BrazilSeniorWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates extensive backend development expertise in .NET Core/.NET 6, focusing on API development, performance optimization, and security. Proficient in modern development practices, including microservices architecture and automated testing.

Highest-signal resume keywords
Backend Development with .NET Core/.NET 6C# ProgrammingREST APIs DevelopmentMicroservices ArchitectureAutomated Testing

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Backend DevelopmentAPI DevelopmentPerformance OptimizationSecurity Best PracticesSQL ServerCode ReviewsLegacy System MaintenanceRefactoringContinuous ImprovementTest Automation
Tools & Technologies
GitOpenTelemetryRedisCI/CDDistributed Caching
Industry Keywords
MicroservicesObservabilityAgile EnvironmentsAuthentication ServicesAuthorization Services

Tech Stack

Tools & technologies
RedisSQL.NET

About the role

Key responsibilities & impact
  • Work on the evolution of critical systems
  • Develop APIs and modernize the technology platform
  • Participate in architectural decisions and projects of high business relevance
  • Develop and maintain backend APIs in .NET, focusing on performance, security, and availability
  • Enhance authentication and authorization services
  • Refactor legacy systems, reducing complexity and technical debt
  • Implement automated tests and participate in code reviews
  • Support observability, monitoring, and continuous improvement initiatives
  • Contribute to microservices-based architectures and modern development practices

Requirements

What you’ll need
  • 5+ years of solid experience in backend development with .NET Core/.NET 6 or later
  • Proficiency in C#, REST APIs, and SQL Server
  • Experience with automated testing, Git, and code reviews
  • Knowledge of microservices architecture and API security best practices
  • Experience maintaining and enhancing legacy systems
  • Preferred: experience with OpenTelemetry, observability, and distributed tracing
  • Preferred: knowledge of Redis and distributed caching solutions
  • Preferred: experience with CI/CD and test automation
  • Preferred: experience migrating .NET versions and working in agile environments
  • Degree in Computer Science, Software Engineering, Information Systems, or a related field, combined with proven backend development experience

Benefits

Comp & perks
  • Ongoing professional development
  • Accessibility and inclusion: applications from candidates with disabilities are welcome