Remote Lead .NET Developer: Modernization & APIs

Eliassen Group; Madison (WI); Remote; USD 96,000 - 107,000; Full time

Benefits offered by this job

Referral program

Benefits package including health and

Job summary

Eliassen Group is seeking a Lead .NET Developer to drive a large-scale modernization initiative, replacing legacy mainframes with modern .NET services and APIs. This remote, contract-to-hire role emphasizes hands-on leadership in backend development, architecture guidance, and enterprise integrations.

You will guide design decisions, mentor developers, and collaborate with teams to deliver scalable, production-grade solutions across critical business functions.

Qualifications

• Strong hands-on .NET/C# development experience.
• Advanced experience building REST APIs and backend services.
• Strong experience with Kafka & event-driven architecture.
• Experience with Apicurio or similar tools for schema design.
• Strong enterprise application development background.
• Experience designing integrations across multiple systems.
• Experience building and supporting production-grade applications.
• Ability to analyze legacy applications and translate business logic into modern services.
• Experience providing technical leadership, architecture guidance, 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#

REST APIs

Kafka

Event-driven

Architecture guidance

Mentoring

Legacy modernization

Backend design

Technical leadership

Tools

Apicurio

Job description

Eliassen Group is seeking a Lead .NET Developer to drive a large-scale modernization initiative, replacing legacy mainframes with modern .NET services and APIs. This remote, contract-to-hire role emphasizes hands-on leadership in backend development, architecture guidance, and enterprise integrations.

You will guide design decisions, mentor developers, and collaborate with teams to deliver scalable, production-grade solutions across critical business functions.