Remote Lead .NET Developer – Modernization & APIs

Eliassen Group; Atlanta (GA); Remote; USD 96,000 - 107,000; Full time

Job summary

Eliassen Group is seeking a Lead .NET Developer for a large modernization project. This fully remote, contract-to-hire role focuses on backend services and APIs, guiding a transition from legacy mainframe to modern .NET systems.

You will lead design decisions, mentor developers, and collaborate with architecture teams to deliver scalable, event-driven solutions across enterprise platforms.

Qualifications

• Strong hands-on .NET/C# development experience.
• Advanced experience building REST APIs and backend services.
• Strong experience with Kafka and event-driven architecture.
• Experience designing integrations across multiple systems.
• 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#

REST APIs

Kafka

Event-driven

Apicurio

Systems integration

Production-grade apps

Technical leadership

Job description

Eliassen Group is seeking a Lead .NET Developer for a large modernization project. This fully remote, contract-to-hire role focuses on backend services and APIs, guiding a transition from legacy mainframe to modern .NET systems.

You will lead design decisions, mentor developers, and collaborate with architecture teams to deliver scalable, event-driven solutions across enterprise platforms.