Principal .Net Engineer

Systems Ltd is looking for a Principal .NET Engineer with strong experience in building distributed, resilient, and highly scalable enterprise systems. The ideal candidate will have hands-on production experience with durable execution platforms, workflow orchestration frameworks, actor-based systems, or large-scale event-driven architectures.

Responsibilities

• Design, develop, and maintain high-quality software systems using modern .NET technologies.
• Develop and support long-running business workflows that require durable execution, state management, fault tolerance, and recovery capabilities.
• Build distributed systems that coordinate work across multiple services, applications, and external integrations.
• Design and implement resilient solutions with retry policies, failure recovery mechanisms, and idempotent processing.
• Develop event-driven and message-based architectures using asynchronous communication patterns.
• Refactor and modernize existing systems to improve scalability, reliability, and maintainability.
• Collaborate with architects, engineers, product owners, and stakeholders to deliver complex distributed solutions.
• Participate in system design discussions focusing on resilience, eventual consistency, observability, and operational excellence.

Requirements:

• 6+ years of hands-on experience developing applications using C# and .NET / .NET Core.
• Strong understanding of distributed systems principles and cloud-native application design.
• Experience designing and supporting production systems requiring: Long-running workflows, Stateful coordination, Distributed execution, Failure recovery, Retry mechanisms, Idempotent processing, Eventual consistency
• Hands-on production experience with one or more of the following platforms: Microsoft Orleans, Temporal, Azure Durable Functions / Azure Durable Task Framework, Akka.NET Bootcamp / Akka, Dapr Actors, Cadence, Netflix Conductor, Erlang/OTP
• Candidates without workflow orchestration experience may still qualify if they have significant production experience with: Event-Driven Architecture (EDA), Apache Kafka, Azure Service Bus, RabbitMQ, Event Sourcing, CQRS, Saga Pattern, Asynchronous messaging systems
• Experience building cloud-native applications on Microsoft Azure.
• Experience with Azure Functions, Azure Service Bus, Azure Kubernetes Service (AKS), Redis, and related cloud services.
• Experience with microservices architecture and service-to-service communication patterns.
• Experience integrating with third-party APIs and external systems.
• Strong understanding of asynchronous programming and concurrency patterns.
• Experience designing scalable, fault-tolerant, and highly available systems.
• Familiarity with CI/CD practices and Azure DevOps or Git-based workflows.
• Experience working in Agile/Scrum environments.
• Strong analytical, troubleshooting, and communication skills.