Senior .Net Developer

Optimal Growth Technologies; Remote; ZAR 600 000 - 800 000; Full time

Job summary

A leading tech firm seeks a Senior .NET Developer for a 12-month contract, focusing on designing and developing robust applications. You will lead the delivery of scalable backend systems and mentor junior developers. Key skills required include 8+ years in .NET (C#, .NET Core) and experience with cloud platforms, REST APIs, and strong problem-solving abilities. This is a fully remote position based in South Africa.

Qualifications

• 8+ years of experience as a .NET Developer.
• Experience with cloud platforms, preferably Azure.
• Understanding of clean architecture, DDD, design patterns, and SOLID principles.

Responsibilities

• Lead design, development, and optimization of enterprise applications.
• Develop and consume RESTful APIs and microservices.
• Mentor junior developers through code reviews.

Skills

C#

.NET Core/.NET 6+

ASP.NET Core

Entity Framework / EF Core

REST APIs

Microservices

SQL Server

PostgreSQL

LINQ

asynchronous programming

Azure

Git

CI/CD pipelines

Docker

Kubernetes

Education

Bachelor's degree in Computer Science

Microsoft certifications

Job description

Job Title: Senior .NET Developer

Location: Remote

Employment Type: 12 month Contract

Role Overview

We are seeking an experienced Senior .NET Developer to join our development team and lead the design, development, and optimization of robust, scalable enterprise applications. The ideal candidate is a hands‑on technical expert with strong problem‑solving skills, excellent architectural understanding, and the ability to mentor junior developers. You will be responsible for full SDLC delivery, high‑quality coding, system integrations, and contributing to innovation across the technology landscape.

Key Responsibilities

• Application Development & Architecture
• Design, develop, and maintain high‑performance applications using .NET technologies.
• Lead technical design sessions and contribute to architectural decisions.
• Build scalable, secure, and reliable backend systems and APIs.
• Ensure adherence to best coding practices, performance optimization, and maintainability.
• System Integration & Deployment
• Develop and consume RESTful APIs, microservices, and integrations with third‑party systems.
• Collaborate with DevOps teams on CI/CD pipelines and automated deployments.
• Technical Leadership & Collaboration
• Mentor and support junior developers through code reviews and technical guidance.
• Work closely with Product Owners, Business Analysts, QA, and UI/UX teams to deliver high‑quality software.
• Contribute to sprint planning, estimations, and agile ceremonies.
• Quality Assurance
• Perform unit testing, debugging, troubleshooting, and performance tuning.
• Ensure code quality through peer reviews, refactoring, and adherence to SOLID principles.

Technical Skills

• 8+ years of experience as a .NET Developer (C#, .NET Core/.NET 6+).
• Strong experience with:
• ASP.NET Core
• Entity Framework / EF Core
• REST APIs & Microservices
• SQL Server / PostgreSQL
• LINQ & asynchronous programming
• Experience with cloud platforms (Azure, AWS, or GCP preferably Azure).
• Understanding of clean architecture, DDD, design patterns, and SOLID principles.
• Experience with front‑end technologies (Angular, React, or Blazor) is advantageous.
• Experience working with Git, CI/CD pipelines, and containerization (Docker/Kubernetes) is a plus.

Soft Skills

• Strong problem‑solving and analytical mindset.
• Excellent communication and collaboration skills.
• Ability to work independently and take ownership of solutions.
• Strong attention to detail and commitment to code quality.

Qualifications

• Bachelors degree in Computer Science, Information Systems, Engineering, or related field (preferred).
• Relevant Microsoft certifications beneficial but not required.