Intermediate .NET Developer

ATS Client; Johannesburg; On-site; ZAR 480,000 - 720,000; Full time

Benefits offered by this job

Hybrid work model (1 day in-office)

Job summary

ATS Client in Johannesburg, South Africa, seeks an Intermediate .NET Developer focused on system modernization and data. You will migrate legacy AngularJS/.NET Framework systems to Angular (v10+) and .NET Core/5+ in a cloud-ready architecture.

You will design scalable microservices, manage RPCs and messaging with RabbitMQ/Kafka/Azure Service Bus, and optimize SQL Server performance while ensuring CI/CD and operational stability.

Qualifications

• Proficiency in C#, .NET Core / .NET 5+, AngularJS and modern Angular (v10+).
• Strong TypeScript/JavaScript/HTML5/CSS skills.
• Experience designing RESTful APIs, microservices and distributed systems.
• Experience with message buses (RabbitMQ, Kafka, Azure Service Bus) and SQL Server.

Responsibilities

• Migrate legacy applications to modern Angular (v10+) and .NET Core/5+.
• Design and implement scalable microservices and RESTful APIs.
• Manage inter-service communication with RabbitMQ, Kafka or Azure Service Bus.
• Optimize SQL Server performance and support high-volume data throughput.
• Oversee architecture, CI/CD, deployment and system stability.
• Collaborate with product/business teams to align capabilities with needs.

Skills

C#

.NET Core / .NET 5+

AngularJS

TypeScript

JavaScript

RESTful API design

Microservices

RabbitMQ / Kafka / Azure Service Bus

SQL Server

CI/CD

Agile/Scrum

Job description

Intermediate .NET Developer (System Modernization & Data Focus)

About Our Client

• Leading B2B Credit Bureau in South Africa.
• Providing data-driven insights to help businesses manage credit risk, supplier relationships, and operational decision-making.
• Company operates within a strong technology group and is now embarking on a full system modernization journey - transforming legacy systems into scalable, high-performance platforms that support long-term growth.

The Role

• Location: Johannesburg, South Africa
• Job Type: Hybrid (1 day a week in-office)
• Experience: 2 - 5+ years of experience.
• Motivation: A passion for system modernization, and technical depth to rebuild distributed systems for scale and performance.
• Expectation: You'll work under a lead engineer, and drive the end-to-end transformation of critical systems built on AngularJS and .NET Framework into a modern, cloud-ready architecture.

Key Responsibilities

• Modernize & Rebuild: Migrate legacy applications to modern Angular (v10+) and .NET Core/5+.
• Architect for Scale: Design and implement scalable microservices and RESTful APIs following SOLID and domain-driven design principles.
• Distributed Systems: Manage inter-service communication using RabbitMQ, Kafka, or Azure Service Bus in an event-driven architecture.
• Data & Performance: Optimize SQL Server performance and improve high-volume data throughput.
• System Ownership: Oversee architecture, CI/CD, deployment, monitoring, and ongoing stability of systems.
• Cross-Team Collaboration: Work with product and business teams to ensure alignment between system capabilities and operational needs.

Skills & Experience

• 2 - 5+ years of professional software development experience
• Proficiency in C#, .NET Core / .NET 5+, AngularJS, and modern Angular (v10+).
• Expertise in TypeScript, JavaScript, HTML5, and CSS.
• Strong background in microservices, RESTful API design, and distributed systems.
• Experience with message bus technologies (RabbitMQ, Kafka, Azure Service Bus).
• Solid SQL Server skills (query optimization, schema design, performance tuning).
• Familiar with CI/CD pipelines, Git, and Agile/Scrum methodologies.
• Strong communication, and problem-solving skills - able to bridge technical and business contexts.

Nice to Have

• Experience with cloud-based environments (Azure or AWS).
• Familiarity with containerization (Docker, Kubernetes).
• Exposure to large-scale modernization or re-platforming projects.

Culture & Benefits

• Collaborative.
• Forward-thinking engineering culture.
• Values technical excellence, ownership, and long-term system sustainability.
• Expect autonomy in decision-making, mentorship opportunities, and the chance to shape the technical foundation of a business-critical system serving enterprises across Southern Africa.