Remote Lead .NET Architect — Modernization & APIs

Eliassen Group; Honolulu (HI); Remote; USD 96,000 - 107,000; Full time

Job summary

Eliassen Group is seeking a hands-on Lead .NET Developer for a contract-to-hire engagement focused on modernizing legacy mainframe systems into .NET services and APIs. You will lead backend development and architecture decisions.

You will design REST endpoints, mentor teams, and drive event-driven patterns with Kafka while ensuring production-grade delivery across enterprise integrations. Remote work option for US-based candidates.

Qualifications

• Hands-on .NET/C# development experience required.
• Experience building REST APIs and backend services.
• Experience with Kafka and event-driven architecture.
• Experience with schema design tools such as Apicurio.
• Strong enterprise application development background.
• Experience designing integrations across multiple systems.
• Experience building and supporting production-grade applications.
• Ability to translate legacy applications into modern services.
• Experience providing technical leadership or mentoring.

Responsibilities

• Lead the design and development of backend services and REST APIs using .NET/C#.
• Help drive the modernization of legacy mainframe applications into modern .NET services.
• Translate existing mainframe business logic into scalable, maintainable solutions.
• Design and build event-driven services, consumers, and publishers.
• Lead integrations across internal and third-party enterprise platforms.
• Provide technical guidance and help establish development best practices.
• Partner with engineering teams on architecture, design decisions, and implementation.
• Support finance, payroll, data, and other business-critical integrations.
• Mentor developers and provide technical direction throughout modernization efforts.

Skills

.NET/C# development

REST APIs

Kafka

Event-driven architecture

Legacy modernization

Technical leadership

Tools

Apicurio

Job description

Eliassen Group is seeking a hands-on Lead .NET Developer for a contract-to-hire engagement focused on modernizing legacy mainframe systems into .NET services and APIs. You will lead backend development and architecture decisions.

You will design REST endpoints, mentor teams, and drive event-driven patterns with Kafka while ensuring production-grade delivery across enterprise integrations. Remote work option for US-based candidates.