Senior .NET Lead: Remote API & Modernization Champion

Eliassen Group; Olympia (WA); Remote; USD 96,000 - 107,000; Full time

Job summary

Eliassen Group is seeking a Lead .NET Developer for a contract-to-hire engagement. This role is remote, focusing on modernizing legacy mainframe applications into .NET services and APIs, with hands-on technical leadership.

You will design backend services, REST APIs, and event-driven architectures, mentor engineers, and partner with across teams to implement production-grade solutions. Rate is $70–$78 per hour on W2.

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.

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

Backend services

Kafka

Event-driven architecture

Apicurio

Architecture guidance

Mentoring

Production-grade apps

Tools

Kafka

Apicurio

Job description

Eliassen Group is seeking a Lead .NET Developer for a contract-to-hire engagement. This role is remote, focusing on modernizing legacy mainframe applications into .NET services and APIs, with hands-on technical leadership.

You will design backend services, REST APIs, and event-driven architectures, mentor engineers, and partner with across teams to implement production-grade solutions. Rate is $70–$78 per hour on W2.