Senior Backend Engineer: .NET to Java Migration (Onsite)

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

Job summary

ATS Client seeks a Senior Backend Engineer to modernize large-scale enterprise financial platforms. You will migrate legacy .NET to Java-based architectures, collaborate with global teams, and contribute to cloud deployments across AWS and Azure.

Ideal candidates have 5+ years in backend development with strong C#/.NET and Java/J2EE skills, solid SQL experience, and a degree in Computer Science or related field. Onsite, full-time engagement in Johannesburg.

Qualifications

• 5+ years of backend development experience.
• Proficiency in C#/.NET and Java/J2EE.
• Solid experience with SQL and large-scale datasets.
• Hands-on experience with CI/CD pipelines and cloud platforms such as AWS or Azure.
• Degree in Computer Science or a related field.
• Previous consulting or client-facing experience is advantageous.

Responsibilities

• Lead backend development initiatives using C#/.NET and Java/J2EE.
• Drive the migration of legacy .NET systems to modern Java‑based architectures
• Design and develop secure, scalable enterprise financial applications
• Collaborate with cross‑functional teams and engage directly with client stakeholders
• Contribute to CI/CD pipelines, DevOps practices, and cloud deployments across AWS and Azure
• Mentor and support junior developers while promoting engineering best practices

Skills

C#/.NET

Java/J2EE

SQL

CI/CD

DevOps

AWS

Azure

Education

Degree in Computer Science

Job description

ATS Client seeks a Senior Backend Engineer to modernize large-scale enterprise financial platforms. You will migrate legacy .NET to Java-based architectures, collaborate with global teams, and contribute to cloud deployments across AWS and Azure.

Ideal candidates have 5+ years in backend development with strong C#/.NET and Java/J2EE skills, solid SQL experience, and a degree in Computer Science or related field. Onsite, full-time engagement in Johannesburg.