Remote Lead .NET Developer – Modernization & API Leader

Eliassen Group; Denver (CO); Remote; USD 96,000 - 107,000; Part time

Job summary

Eliassen Group is seeking a Lead .NET Developer to drive a large-scale modernization initiative, replacing legacy mainframe applications with modern .NET services and APIs. This is a hands-on technical leadership role for someone who can lead backend development, influence solution design, and guide the transition of critical enterprise applications.

The position is remote, with W2 hourly compensation in the $70–$78 range, and requires strong .NET/C# skills, experience building REST APIs and

Qualifications

• Strong hands-on .NET/C# development experience
• Advanced experience building REST APIs and backend services
• Strong experience with Kafka and event-driven architectures
• Experience with Apicurio or similar schema-design tools
• Solid enterprise application development background
• Experience designing integrations across multiple systems
• Experience building and supporting production-grade applications
• Ability to translate legacy 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 modernization of legacy mainframe applications into modern .NET services
• Translate 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

Enterprise apps

System integrations

Production-grade apps

Technical leadership

Job description

Eliassen Group is seeking a Lead .NET Developer to drive a large-scale modernization initiative, replacing legacy mainframe applications with modern .NET services and APIs. This is a hands-on technical leadership role for someone who can lead backend development, influence solution design, and guide the transition of critical enterprise applications.

The position is remote, with W2 hourly compensation in the $70–$78 range, and requires strong .NET/C# skills, experience building REST APIs and