We are looking for a Senior Backend Engineer to design, develop, and optimize high-performance backend services that power mission-critical healthcare and procurement platforms. In this role, you will build scalable .NET 8 microservices, develop secure APIs, implement event-driven architectures using Kafka, and contribute to resilient, observable, and highly available distributed systems.
You will collaborate with cross-functional teams to deliver reliable backend solutions while driving engineering best practices around architecture, performance, security, and software quality.
Key Responsibilities
- Design, develop, and maintain scalable backend services using .NET 8 and ASP.NET Core.
- Build and maintain RESTful APIs, GraphQL endpoints, and background processing services.
- Develop event-driven microservices using Kafka, including producers, consumers, retry mechanisms, idempotency, and Dead Letter Queue (DLQ) strategies.
- Design software following Domain-Driven Design (DDD) and Clean Architecture principles.
- Develop and optimize data access using Entity Framework Core and SQL Server, including indexing, query optimization, transactions, and database migrations.
- Implement distributed systems patterns including Outbox/Inbox, correlation IDs, distributed tracing, and resilient communication.
- Integrate backend services with Ultimus BPM for workflow automation and business process orchestration.
- Improve application observability using Serilog, Elastic Stack (Elasticsearch/Kibana), metrics, and distributed tracing.
- Ensure secure development practices by implementing API security, rate limiting, input validation, and OWASP recommendations.
- Write and maintain automated unit, integration, and contract tests while participating in peer code reviews.
- Deploy and support containerized applications running on on-premises Kubernetes environments.
- Work closely with Product Managers, DevOps Engineers, QA Engineers, and Frontend Developers to deliver high-quality software.
Required Qualifications
- Bachelor's degree in Computer Science, Software Engineering, or a related field.
- Minimum 5 years of backend software development experience.
- At least 2 years of hands-on experience with ASP.NET Core/.NET Core in production environments.
- Strong expertise in C#, .NET 8, and ASP.NET Core.
- Proven experience building and maintaining Microservices architectures.
- Strong hands-on experience with Kafka, including topics, partitions, consumer groups, offsets, retries, and idempotent processing.
- Strong SQL Server knowledge, including indexing, query execution plans, transactions, and performance optimization.
- Practical experience with Entity Framework Core.
- Experience with Docker and Kubernetes (on-premises environments preferred).
- Experience implementing distributed systems patterns such as Outbox/Inbox, Circuit Breaker, Saga, Retry, Bulkhead, and Idempotency.
- Experience with logging, monitoring, and observability tools such as Serilog, Elastic/Kibana, and distributed tracing.
- Experience securing APIs using authentication, authorization, secrets management, and OWASP best practices.
- Experience working with CI/CD pipelines using Azure DevOps, Git, and SonarQube.
- Excellent communication, collaboration, and documentation skills.
Nice to Have
- Ultimus BPM integration experience.
- Redis.
- Nginx.
- GraphQL.
- SignalR.
- Event Sourcing.
- CQRS.
- Performance engineering and cost optimization experience.
