Senior .Net Developer (Integrations)

ATS Client; Johannesburg; On-site; ZAR 482,160 - 757,680; Full time

Job summary

ATS Client in Johannesburg is seeking a Senior Systems Integration Developer to own the connective tissue between internal platforms and external third‑party systems. You will design end‑to‑end integration solutions and shape the organization’s application architecture.

You will build secure APIs, govern integration code, mentor junior developers, and collaborate across the SDLC on multiple concurrent projects while staying alert to data protection and security threats.

Qualifications

• Matric plus a tertiary qualification in CS, IS, or equivalent (NQF 7).
• 5+ years of Systems Integration experience.
• Strong knowledge of .NET stack and integration patterns.

Responsibilities

• Develop and integrate multiple enterprise systems per business needs.
• Map end-to-end application solutions and document specs.
• Build and maintain secure APIs for external systems.
• Run tests, debug, and optimize system performance.
• Mentor junior developers and collaborate across SDLC.
• Stay updated on security threats and data protection.

Skills

C#

ASP.NET

ASP.NET Core

JavaScript

jQuery

XML

CSS

Bootstrap

Agile methodology

Education

Matric plus a tertiary qualification in Computer Science, Information Systems, or equivalent (NQF Level 7)

Tools

MS SQL

Web API

SSRS

MS Azure DevOps

XML

CSS

Bootstrap

JavaScript

Job description

Senior Systems Integration Developer (.NET)

Johannesburg, South Africa | On-site Package: R350-R550 ZAR per Hour

The Role

A leading enterprise is looking for a Senior Systems Integration Developer to own the connective tissue between their internal platforms and external third‑party systems. You will be the engineer that other developers turn to when integration code breaks, security threats need mitigating, or a new enterprise system must communicate with multiple others cleanly. This is not a maintenance role – you will map conceptual, end‑to‑end solutions independently and shape how the organization’s application architecture evolves.

What You'll Do

• Develop and integrate multiple enterprise systems in line with business needs and requirements
• Independently map out conceptual, end‑to‑end application solutions and document technical specifications
• Build and maintain secure APIs/frameworks for external third‑party systems to interface with
• Perform configuration management on integration code and systems interfaces
• Write, translate, and code software programs and applications to specification
• Run and monitor performance tests on new and existing systems; isolate, debug, and resolve problem areas
• Administer test results, deliver root‑cause analysis, and drive fixes
• Manage and mentor junior developers
• Participate fully across the SDLC on a variety of concurrent projects
• Research emerging tools, languages, and standards; recommend and schedule improvements and upgrades
• Collaborate with developers, analysts, and QA to conceptualize new software solutions
• Stay current on data protection and security threats, and ensure risks are mitigated
• Conform to relevant legislation, policy, and industry best practice

What You'll Bring

5+ years of experience directly related to Systems Integration, including most of the following:

• C#, ASP.NET (5+ years), ASP.NET Core (2‑3 years)
• MS SQL, Web API
• JavaScript, jQuery, XML, CSS, Bootstrap
• SSRS
• MS Azure DevOps (2‑3 years)
• Agile methodology

Qualifications

Matric plus a tertiary qualification in Computer Science, Information Systems, or equivalent (NQF Level 7)

Advantageous

• Microsoft Certified Technology Specialist (MCTS)
• Microsoft Certified Professional Developer (MCPD)
• Own reliable transport

Why This Role

Senior scope from day one – you will manage integration architecture and guide junior developers, not just execute tickets. Broad, modern .NET stack with room to specialize. Based in Johannesburg with a package that reflects the seniority of the mandate.

Salt is acting as an Employment Business in relation to this vacancy.