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# NET Developer

- **Company:** Eliassen Group
- **Location:** Concord, NH, United States (Remote available)
- **Experience:** Experienced
- **Salary:** $135,200.0 - $156,000.0
- **Contract:** Temporary to permanent
- **Skills:** .NET Framework, Application Programming Interfaces (APIs), Artificial Intelligence, Business Logic, C Sharp (Programming Language), Data Integration, OneStream, Salesforce.Com, Systems Integration, Enterprise Software Applications, Large Language Models, Backend, Event Driven Architecture, Integration Frameworks, Apache Kafka, Event Sourcing, Restful APIs
- **Published:** October 16, 2026
- **Apply:** https://www.techcareers.com/job.asp?id=3451625762&tx=VT6459TTT&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54

## About the Role

* Strong hands-on experience with .NET/C# development.
 * Experience developing REST APIs and backend services.
 * Strong understanding of enterprise application development.
 * Experience working 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.

## Description

Our client seeks 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. You will build scalable services that integrate with internal and third-party systems and collaborate with engineering teams to modernize critical enterprise applications., * 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.