Senior .Net Developer

Penta Consulting Ltd; Johannesburg; On-site; ZAR 520,000 - 780,000; Full time

Job summary

Penta Consulting Ltd in Johannesburg seeks a Senior .NET Developer for a 6-month contract, on-site 4 days a week. You will design, build and maintain backend systems and APIs using .NET Core, focusing on Web API and Worker Services.

You will optimize SQL Server databases, implement distributed caching, and work with frontend teams to ensure seamless integration and high-quality user experiences. Strong problem solving and asynchronous programming skills are essential.

Qualifications

• Experience building RESTful APIs and background services using .NET Core.
• Proven ability to design scalable backend systems and APIs.
• Solid understanding of asynchronous programming, dependency injection, and middleware.

Responsibilities

• Design, develop and maintain backend systems and APIs using .NET Core.
• Architect and optimize SQL Server databases with performance tuning.
• Collaborate with frontend developers to ensure seamless integration and high-quality user experiences.

Skills

.NET Core

SQL Server

Distributed Caching

JavaScript (Frontend Exposure)

Tools

ElasticSearch

Redis

RabbitMQ

Job description

# Senior .Net DeveloperJob Reference No.CR/03999Job Type: ContractLocation: Johannesburg, South AfricaJob Reference No.: CR/03999We are currently searching for a Senior .Net Developer to join our clients team in Johannesburg. This role is offered as a 6 month extendable contract, and you will be required to be on site 4 days a week.## Core ResponsibilitiesDesign, develop, and maintain scalable backend systems and APIs using .NET Core, with a focus on Web API and Worker Services. Architect and optimize SQL Server databases, ensuring robust database design, performance tuning, and indexing strategies. Implement and manage distributed caching mechanisms to enhance application performance and scalability. Collaborate with frontend developers and other stakeholders to ensure seamless integration and high-quality user experiences.## Required Skills & Experience**.NET Core:*** Extensive experience building RESTful APIs and background services using Worker Services.* Strong understanding of asynchronous programming, dependency injection, and middleware pipelines.**SQL Server:**Proven expertise in database schema design, query optimization, indexing, and performance troubleshooting. Experience with stored procedures, views, and complex joins.**Distributed Caching:**Hands-on experience with caching strategies and technologies to reduce latency and improve throughput.**JavaScript (Frontend Exposure):**Practical experience integrating backend services with frontend applications using JavaScript. Ability to debug and support frontend issues related to API consumption.## Advantageous Skills**ElasticSearch:**Experience implementing search capabilities and analytics using ElasticSearch.**Redis:** Familiarity with Redis for caching, session management, and pub/sub messaging.**RabbitMQ:** Understanding of message queuing concepts and experience integrating RabbitMQ for asynchrono