Principal C#/.NET Engineer — Mainframe Modernization Lead
Listed on 2026-10-15
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Software Development
.NET Developer, Software Architect
Rose International in Hamilton, NJ seeks a Principal C#/.NET Engineer to lead modernization of a large mainframe-based benefits system. You will refactor COBOL-derived code into clean .NET, define EF Core data access against PostgreSQL, and set engineering standards while ensuring functional equivalence with the legacy system.
Onsite in Hamilton, NJ is required. The role emphasizes high-performance, nightly batch window optimization, and mentoring junior developers within a Scrum environment.
We are currently recruiting a Principal C#/.NET Engineer — Mainframe Modernization Lead for our team in Trenton, NJ, United States.
Full responsibilities and requirements are described in the listing above.
Learn more about the Principal C#/.NET Engineer — Mainframe Modernization Lead role in the description above.
We appreciate your interest in this position.
Join Rose International and contribute to our ongoing work.
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