Senior Backend Engineer: .NET to Java Migration & Cloud

ATS Client; Johannesburg; On-site; ZAR 1,170,000 - 1,430,000; Full time

Job summary

ATS Client in Johannesburg is seeking a Senior Backend Engineer to lead modernization of enterprise financial platforms. The role focuses on migrating legacy .NET systems to scalable Java-based architectures.

You will drive backend development, design secure systems, and collaborate with cross-functional teams while contributing to CI/CD and cloud deployments (AWS/Azure). Mentoring junior developers is also part of the role.

Qualifications

• 5+ years of backend development experience.
• Strong proficiency in C#/.NET and Java/J2EE.
• Solid SQL and large dataset experience.
• Experience with CI/CD and cloud platforms (AWS or Azure).
• Degree in Computer Science or related field.
• Consulting or client-facing experience preferred.

Responsibilities

• Lead backend development across C#/.NET and Java/J2EE.
• Drive migration from legacy .NET to modern Java architectures.
• Design secure, scalable enterprise financial systems.
• Collaborate with cross-functional and client-facing teams.
• Contribute to CI/CD pipelines, DevOps practices, and cloud deployments (AWS/Azure).
• Mentor junior developers.

Skills

C#/.NET

Java/J2EE

SQL

CI/CD

Cloud platforms

Consulting/client-facing

Mentoring

Education

Degree in Computer Science

Job description

ATS Client in Johannesburg is seeking a Senior Backend Engineer to lead modernization of enterprise financial platforms. The role focuses on migrating legacy .NET systems to scalable Java-based architectures.

You will drive backend development, design secure systems, and collaborate with cross-functional teams while contributing to CI/CD and cloud deployments (AWS/Azure). Mentoring junior developers is also part of the role.