Senior Software Engineer (C# / Python)

wePlace; Johannesburg; On-site; ZAR 600 000 - 900 000; Full time

Job summary

A technology company based in Johannesburg is seeking a Back-End Software Engineer III to design scalable backend systems and mentor junior engineers. The ideal candidate will have over 6 years of experience in .NET (C#) and/or Python, with strong knowledge of AWS services. This role offers the opportunity to work in a collaborative environment delivering end-to-end solutions.

Qualifications

• 6+ years of proven experience in back-end software development using .NET (C#) and/or Python.
• Hands-on experience designing and maintaining microservices and event-driven architectures.
• Experience with cloud solutions on AWS, including services like EKS and Lambda.

Responsibilities

• Design and build scalable, secure backend systems for enterprise applications.
• Mentor junior engineers and contribute to engineering standards.
• Collaborate with cross-functional teams for end-to-end solutions.

Skills

Analytical Skills

Attention to Detail

Communications Skills

Interpersonal & Relationship management Skills

Problem solving skills

Education

Grade 12 National Certificate / Vocational

Relevant tertiary qualification in Information Technology

Tools

.NET (C#)

Python (FastAPI)

Terraform

AWS

Docker

Kubernetes

PostgreSQL

SQL Server

MySQL

Job description

Purpose Statement

The Back-End Software Engineer III plays a critical role in designing and building scalable, secure, and high-performing backend systems that power our enterprise applications. You will work within a cross-functional team to deliver end-to-end solutions, from architecture and development to deployment and monitoring. At this level, you will also mentor junior engineers, contribute to engineering standards, and ensure best practices across the software development lifecycle.

Education (Minimum)

• Grade 12 National Certificate / Vocational

Education (Ideal or Preferred)

• A relevant tertiary qualification in Information Technology

Knowledge and Experience

Experience

• 6+ years of proven experience in back-end software development using .NET (C#) and / or Python for enterprise-grade applications.
• Hands-on experience designing, developing, and maintaining microservices and event-driven architectures in production environments.
• Proven track record in architecting and implementing cloud solutions on AWS, including services such as EKS, Lambda, RDS, MSK, S3, and ElastiCache.
• Experience in automating infrastructure provisioning and management using Terraform and GitOps workflows (ArgoCD, GitHub Actions, Jenkins).
• Practical experience implementing CI / CD pipelines for build, test, and deployment automation.
• Exposure to observability practices (metrics, tracing, logging) and maintaining system health using monitoring tools.
• Experience collaborating with cross-functional teams (DevOps, QA, Product, Architecture) to deliver end-to-end solutions.
• Previous involvement in mentoring junior engineers, conducting code reviews, and contributing to engineering standards.

Knowledge

• Strong programming skills in C# (.NET 7 / 8 / 9) and Python (FastAPI).
• Deep understanding of AWS cloud services (IAM, EKS, RDS, MSK / Kafka, Lambda, ElastiCache).
• Expertise in Infrastructure as Code using Terraform (modules, state management, environment-specific provisioning).
• Solid understanding of microservices architecture, REST / gRPC APIs, and event-driven design.
• Proficiency with databases (PostgreSQL, SQL Server, MySQL).
• Knowledge of CI / CD tools (GitHub Actions, GitLab CI, Jenkins).
• Strong understanding of containerization (Docker, Kubernetes).
• Familiarity with monitoring and observability tools (Instana, Prometheus, Grafana, OpenTelemetry).

Skills

• Analytical Skills
• Attention to Detail
• Communications Skills
• Interpersonal & Relationship management Skills
• Problem solving skills

Additional Information

• Clear criminal and credit record

Should you not receive a response from us within one week of your application, your application has unfortunately not been successful.