Senior Full Stack Developer (C#.NET, .NET Core, EF Core, React) (JHB On-site)

About the position

ENVIRONMENT:

THE coding expertise of a Senior Full Stack Developer, who moves fast, thinks independently, and sees AI as a superpower, is sought by a dynamic provider of cutting-edge Job Management Software Solutions in Joburg. You'll be shaping a small Engineering team working with high autonomy and impact while working closely with the CTO, fellow Developers and Product team to build, maintain, and evolve the platform. This is a true Full Stack role covering web and mobile apps. This role requires being in the Johannesburg office as collaboration and speed matter here, and they work better together in person. Applicants must preferably have a BSc in Computing/Computer Science with around 3-4 years’ relevant experience including building and maintaining production systems, understand how to prompt for Test-Driven Development (generate tests first, then code that satisfies them) & you can apply AI to solve non-coding problems (automation, internal tooling). Your tech toolset should include: C#.NET, .NET Core, EF Core, React, Node.js/Next.js, Git/GitHub/Jira, Azure and Ionic/Angular/Flutter.

DUTIES:

• Build new features and improve existing systems across our platform.
• Make architectural decisions with validation from senior team members.
• Use AI to implement Test-Driven Development from day one (prompt for tests, then prompt for code that satisfies those tests).
• Contribute AI skills to solve internal efficiency problems across the business.
• Mentor other Developers as the team grows.

REQUIREMENTS:

• Bachelor of Science in Computing/Computer Science, preferred.
• Full Stack Development experience (Web and Mobile).

What they value over years of experience -

• Speed and independence
• Technical depth, architectural thinking, and good judgment
• Ability to learn new technologies quickly
• Track record of shipping things that matter

If you have 3-4 years of experience but demonstrate the four core characteristics above, we want to talk to you. If you have 10+ years but wait to be told what to do, this isn't the role.

Additional -

• Experience building and maintaining production systems.
• Ability to make sound architectural decisions.
• Strong problem-solving and debugging skills.
• You currently use AI tools daily in your development work.
• You understand how to prompt for Test-Driven Development (generate tests first, then code that satisfies them).
• You can apply AI to solve non-coding problems (automation, internal tooling).
• Clear and timely communication within a fast-paced, team.

Tech Stack -

• C# .NET & .NET Core
• EF Core
• React
• Node.js/Next.js
• Git/GitHub/Jira
• Azure
• Ionic/ Angular/ Flutter
• Azure SQL/MySQL/MariaDB
• Claude Code & Agentic AI

ATTRIBUTES:

You move without being pushed - You don't wait for permission or perfect information—when you see a gap, you step toward it, and when the path is unclear, you communicate, start anyway and course-correct.

You have a learner's metabolism - You absorb new information quickly and apply it immediately—you read the tool, the situation, the codebase, and adapt before most people notice things have changed.

You think in outcomes, not activity - You're oriented toward what gets done, not how hard you worked—you can articulate the difference between being busy and being useful, and you hold yourself to the latter.

You're not threatened by AI. You're impatient without it - You see AI as leverage, not competition—you've already found ways to use it in your work because you want to move faster and think bigger than your hours allow.

Desired Skills:

• Senior
• Full
• Stack