Senior .Net Developer

ATS Client; Cape Town; On-site; ZAR 900,000 - 1,300,000; Full time

Job summary

ATS Client is seeking a senior .NET Developer to design, develop and deliver scalable software across fintech, e‑commerce and healthcare domains. You will mentor junior engineers and help drive technical direction while collaborating with Product, Design, QA, DevOps, and leadership.

The role focuses on Microsoft technologies, cloud hosting on Azure, and modern SPA frontend work with React/Typescript. Strong SOLID practices and code quality are essential.

Qualifications

• 6+ years' experience with .NET stack.
• Experience with Azure and SQL/NoSQL databases.
• Experience with CMS like Umbraco or Optimizely.

Responsibilities

• Collaborate with business users to understand requirements.
• Architect, develop, test and support web and mobile apps.
• Provide accurate cost estimates.
• Conduct code audits and PR reviews.
• Mentor junior engineers and drive best practices.

Skills

Microsoft .NET

.NET Core

C#

JavaScript

Web API

Razor

HTML5

CSS3

SCSS

React

Typescript

Azure

SQL

NoSQL

Cosmos

Azure DevOps

Umbraco

Optimizely

SOLID

Agile SCRUM

Jira

Mentoring

Tools

Visual Studio

Git

Azure DevOps

Job description

WHO ARE WE LOOKING FOR?

As a Senior .NET Developer, you will play a key role in designing, developing, and delivering modern software solutions across a variety of industries including fintech, e-commerce, healthcare, logistics, and digital transformation initiatives. You will collaborate closely with cross‑functional teams including Product, Design, QA, DevOps, and Engineering leadership to build scalable and maintainable solutions using modern Microsoft technologies. This is a hands‑on senior engineering role suited for someone who enjoys ownership, mentoring others, and contributing to technical direction.

SKILLS REQUIRED

• Minimum of 6+ years' experience in Microsoft .NET, .NET Core, C#
• Excellent experience using JavaScript / Web API / Razor / JSON
• Good frontend skills and working with HTML5 / CSS3 / SCSS
• Good knowledge of JavaScript frameworks (React, React Native, Typescript)
• Good database and server‑side application skills with Azure, SQL / NoSQL (Cosmos)
• Cloud hosting platform experience – Azure App Services and application development and Azure DevOps experience is very advantageous
• Experience in developing/maintaining content management systems – Umbraco, Optimizely CMS very advantageous
• Excellent understanding of stored procedures and database design/normalization
• Excellent understanding of source control best practice and branching strategies
• Event driven architectures and approaches
• Excellent understanding of SOLID principles and best practices to follow within development
• Knowledge of software engineering practices for the full software development life cycle, including coding standards, code reviews, source control management, build processes and testing
• Gather customer software requirements and develop related software applications and programs (to spec)
• Good application performance optimization strategies and techniques
• Good knowledge of object‑oriented concepts
• Experience in system integration techniques
• Experience interfacing with clients, understanding client business strategies and how to deliver these within applications you architect
• Communicating at a management level. Speaking with authority and lucidity to clients and team members
• Experience working with Agile / SCRUM methodologies
• Experience using project management tools like Jira
• Happy to mentor and grow self‑motivated less experienced team members
• Team player and not afraid of a bit of hard‑work and fun with colleagues

KEY RESPONSIBILITIES

• Interact with business users, business analysts and other developers to understand new requirements
• Write technical specifications and develop new functionality to company standards and deadlines
• Participate in design and planning sessions
• Architect, develop, test and support web and mobile applications
• Provide accurate cost estimates
• Research and evaluate software related technologies and products
• Implement and ensure development best practices, and programming standards are adhered to across your projects
• Continuously improve development processes and libraries for maintainability, scalability and efficiency
• Code audits and pull request reviews
• Assist and support other team members on their projects (if required)
• Interact with clients to determine their requirements and needs

YOUR BEHAVIOURS

• You set a high bar for yourself and your team's engineering skills
• You possess excellent interpersonal and communication skills (oral and written)
• You provide technical leadership and mentor more junior engineers
• You develop high quality maintainable code to meet complex changing environment
• You enjoy fixing and improving technical debt across existing applications
• You seriously test your changes before hitting the main branch
• You continuously deliver improvements to a project solution
• You have solid analytical and problem‑solving skills and strong attention to detail
• You learn quickly and like to stay current with new technologies