Intermediate C# Developer

Intermediate C# Developer (Apache Kafka Experience)

Permanent: Menlyn Maine, Pretoria

About the Role

We are seeking a medium-level C# Developer with strong experience in modern cloud-native application development. The ideal candidate will have proven skills in microservices architecture, containerised deployments, and Azure/Kubernetes orchestration, as well as hands-on production experience with Apache Kafka. The role involves building and maintaining scalable, resilient services that integrate into a distributed financial-technology ecosystem.

Key Responsibilities

• Design, develop, and maintain C#/.NET Core microservices
• Implement containerisation best practices (Docker images, deployment pipelines)
• Deploy and manage applications on Azure Kubernetes Service (AKS) or on-premises Kubernetes clusters
• Collaborate with DevOps teams to optimise CI/CD pipelines and ensure smooth delivery to production
• Architect and maintain Apache Kafka clusters, including:
  • Topic design, partitioning, replication, retention policies
  • Consumer group optimisation and monitoring
  • Schema Registry usage (Avro/Protobuf/JSON)
  • Kafka Connect integration with external systems
  • Security and access control (ACLs, TLS/SASL)
  • Performance tuning and scaling in production
• Implement and maintain observability solutions, including:
  • OpenTelemetry for distributed tracing, metrics, and logging
  • Grafana dashboards for monitoring and alerting
• Work closely with solution architects to ensure alignment with cloud governance and compliance standards
• Participate in code reviews, architectural discussions, and technical design sessions
• Monitor, troubleshoot, and improve performance of services in production

What Were Looking For

• 3 - 5 years C#/.NET Core development experience in production systems
• Strong understanding of microservices principles (domain-driven design, bounded contexts, service-to-service communication)
• Proficiency in containerisation (best practices, image optimisation, debugging containerised apps)
• Hands-on deployment experience with AKS or Kubernetes (RBAC, ConfigMaps, Secrets, Ingress, scaling strategies)
• Apache Kafka (production experience):
  • Administering Kafka clusters
  • Designing event-driven applications and event schemas
  • Monitoring (Prometheus/Grafana, Confluent Control Center, or similar)
  • Handling data consistency and exactly-once/at-least-once semantics
• Experience with Azure cloud services:
  • Azure DevOps (pipelines, repos, artifacts)
  • Azure Monitor / Application Insights
  • Networking basics (VNETs, load balancers, firewalls)
  • Azure Storage and Messaging (Event Hubs, Service Bus a plus)
• PostgreSQL experience (schema design, queries, performance tuning)

Qualification

• IT Diploma or Degree in Computer Science or relevant qualification

Optional / Nice-to-Have Skills

• Exposure to agentic coding approaches and AI-assisted development tools (Claude)
• Experience in other messaging technologies (Azure Event Hubs)
• Familiarity with PCI DSS, financial services compliance, or secure coding practices

Soft Skills

• Strong problem-solving ability in distributed system scenarios
• Good communication skills to work with cross-functional teams
• Ability to balance delivery speed with production reliability
• Proactive attitude toward monitoring, observability, and automation