API Developer (.NET Core 8/9)

Description

**Job Title:** API Developer (.NET Core 8/9\) **Location:** (Remote – Occasional travel might be required to CDMX) **Job Type:** Full\-time **Rate:** $18/hr on C2C **What You’ll Do:** We are seeking a Senior API Developer (.NET Core 8/9\) to join our development team in building robust, high\-performance microservices and APIs. You will play a key role in designing scalable, secure, and maintainable backend services that power our web and mobile applications. In this role, you will collaborate with product managers, front\-end developers, and DevOps engineers to deliver seamless digital experiences and ensure smooth partner integration. This is a mission\-critical position that contributes directly to our organization’s digital transformation initiatives. **Responsibilities:** * Design, develop, and maintain RESTful APIs and microservices using .NET Core 8/9 and ASP.NET Core Web API. * Create secure, versioned, and well\-documented endpoints for internal and external consumption. * Build and manage background jobs and message\-driven workflows using Azure Service Bus and Azure Storage Queues. * Implement OAuth2\.0, JWT, Azure AD for securing APIs; enforce best practices for secure coding. * Enhance performance through caching mechanisms (Redis, in\-memory caching). * Profile APIs and database queries to identify bottlenecks; tune services for speed, scalability, and resilience. * Follow SOLID principles, Clean Architecture, and domain\-driven design to write modular, testable code. * Participate in Agile development processes; collaborate with cross\-functional teams to plan and deliver solutions. * Use debugging tools and logging strategies to maintain uptime and resolve production issues. * Maintain clear, accessible technical documentation for services, endpoints, and integration requirements. **Requirements:** * Bachelor’s degree in Computer Science, Information Systems, or a related technical field. * 8\+ years of backend development experience using .NET Core (6\+ preferred, experience with 8/9 strongly desired). * Strong understanding of RESTful API design, versioning, and integration. * Experience with Clean Architecture and Domain\-Driven Design (DDD). * Deep knowledge of SOLID principles, design patterns, and reusable code practices. * Skilled in SQL Server, including schema design, query tuning, and optimization. * Proficiency in Entity Framework Core and Dapper for data access. * Familiarity with API security standards (OAuth2\.0, JWT, API keys). * Experience writing unit/integration tests using xUnit, Moq, or similar frameworks. * Basic experience with Azure services, including message queues and storage. * Proficiency with Git, Agile workflows, and collaboration tools. * Strong communication and problem\-solving skills. **Preferred Qualifications:** * Hands\-on experience with Azure components (Service Bus, Functions, App Services, AKS). * Experience with Azure Application Insights, Datadog, or other observability tools. * Familiarity with Docker, containerization, and CI/CD pipelines. * Performance testing and load testing experience. * Familiarity with Postman, Swagger/OpenAPI, and other dev/test tools. * Exposure to Agile/Scrum methodologies and sprint planning processes. Job Types: Full\-time, Permanent Pay: $40,000\.00 \- $60,000\.00 per month Application Question(s): * Do you have at least 8 years of experience in backend development using .NET Core? * Are you experienced with designing, implementing, and securing RESTful APIs (including OAuth2\.0, JWT, and Azure AD)? * Have you worked with Azure services such as Service Bus, Functions, or App Services in a professional environment? Language: * English (Required) Work Location: Remote