Intermediate C# Developer

5 days ago

Pretoria, Gauteng, South Africa BARRY INDUSTRIAL SERVICES LTD. Full time R450 000 - R1 350 000 per year

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

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