Senior Backend Engineer — .NET Core & SQL Server Expert

Rosstone; Wes-Kaap; On-site; ZAR 1,100,000 - 1,650,000; Full time

Job summary

Rosstone in Cape Town is seeking a Senior Backend Full Stack Software Engineer to lead the design, development, and evolution of core backend systems using .NET technologies.

You will architect scalable services, craft high-performance SQL Server solutions, and shape backend standards while mentoring engineers and guiding the technical direction of our platform. Collaboration with Vue.js frontend is encouraged and aims toward full-stack ownership.

Qualifications

• 10+ years of professional software development experience.
• Strong expertise in .NET Core / C# and scalable RESTful APIs.
• Experience designing distributed, enterprise-grade systems.
• Advanced SQL Server design, performance tuning and indexing.

Responsibilities

• Lead backend architecture and development for core services.
• Collaborate with frontend to align API design and data flows.
• Define backend standards, reliability, and platform direction.
• Mentor engineers and participate in code reviews.

Skills

C# / .NET

RESTful APIs

Distributed systems

SOLID principles

Tools

Microsoft SQL Server

CI/CD (Azure DevOps)

Job description

Rosstone in Cape Town is seeking a Senior Backend Full Stack Software Engineer to lead the design, development, and evolution of core backend systems using .NET technologies.

You will architect scalable services, craft high-performance SQL Server solutions, and shape backend standards while mentoring engineers and guiding the technical direction of our platform. Collaboration with Vue.js frontend is encouraged and aims toward full-stack ownership.