Remote .NET Backend Developer (Contract-to-Hire)

Eliassen Group; Honolulu (HI); Remote; USD 90,000 - 103,000; Full time

Job summary

Eliassen Group is seeking experienced .NET developers to support a large-scale modernization initiative, replacing legacy mainframe applications with modern .NET-based services and APIs. You will focus on backend development, enterprise integrations, and event-driven applications, building scalable services that integrate with internal and third-party systems.

This contract-to-hire role involves W2 employment with benefits, and a path to full-time employment after the duration of the contract.

Qualifications

• Experience with .NET/C# backend development.
• Experience building REST APIs and backend services.
• Strong understanding of enterprise application development.
• Experience with integrations between multiple applications or systems.
• Experience developing and supporting production-grade applications.
• Ability to understand existing application logic and translate legacy functionality into modern services.
• Mid-level to senior development experience.
• Preferred: Kafka, event-driven architecture, event sourcing, messaging architectures, event consumers and publishers, consumer-driven services, third-party integrations, finance or payroll-related applications, integrations with platforms such as Salesforce, Concur, or OneStream, legacy or mainframe modernization initiatives, Apicurio.
• Interest in AI/LLM is a plus.

Responsibilities

• Design and develop backend services and REST APIs using modern .NET.
• Build replacement services as part of a legacy mainframe modernization effort.
• Review existing mainframe code to understand business logic and use it as reference when developing new solutions.
• Develop event-driven services, consumers, and publishers.
• Build and support integrations with enterprise and third-party applications.
• Contribute to finance-related services, APIs, payroll workflows, and data integrations.
• Work within shared enterprise repositories and established development standards.
• Collaborate with engineering teams on the modernization of critical enterprise applications.

Skills

.NET/C# development

REST APIs

Enterprise app development

System integrations

Production-grade apps

Legacy modernization

Event-driven architecture

Kafka

APicurio

AI/LLM interest

Tools

Apicurio

Job description

Eliassen Group is seeking experienced .NET developers to support a large-scale modernization initiative, replacing legacy mainframe applications with modern .NET-based services and APIs. You will focus on backend development, enterprise integrations, and event-driven applications, building scalable services that integrate with internal and third-party systems.

This contract-to-hire role involves W2 employment with benefits, and a path to full-time employment after the duration of the contract.