.Net Developer

Type: Long Term Contract (2-3 years)

Location: Loveland, Colorado

Schedule: Hybrid (2 days onsite)

Hourly Rate: $60-$80/hour (depending on level of experience)

Position Overview

We are seeking a mid-to-senior level .NET Developer to help build new, modern backend services from the ground up. This role is ideal for someone with strong experience designing scalable APIs, microservices, and event-driven systems using modern .NET.

Our team is building new .NET services that will replace existing Java services, so experience understanding Java-based systems is a plus. The ideal candidate can work independently, collaborate well with cross-functional teams, mentor junior developers, and contribute to strong architecture and engineering practices.

Responsibilities

• Design, develop, and maintain new backend services, RESTful APIs, minimal APIs, and microservices using modern .NET and C#.
• Build scalable systems using Domain-Driven Design, event-driven architecture, and modern architecture patterns.
• Design services with clear domain boundaries, well-defined responsibilities, and maintainable business logic.
• Develop data access layers using Entity Framework, code-first development, migrations, and modern ORM practices.
• Work with relational and NoSQL databases, including schema design, indexing, relationships, data modeling, and query performance.
• Implement dependency injection, middleware, configuration, logging, validation, authentication, and error handling using modern .NET practices.
• Integrate services with messaging and event platforms such as RabbitMQ, Kafka, Azure Service Bus, or similar technologies.
• Use Redis or other caching technologies to improve system performance and reliability.
• Containerize applications using Docker and support deployment into container-based environments.
• Create, publish, and consume NuGet packages, including packages hosted in private repositories.
• Apply object-oriented design, design patterns, SOLID principles, clean architecture, and clean code practices.
• Write and maintain unit tests and integration tests to ensure code quality and system stability.
• Participate in peer code reviews, technical design discussions, and architecture planning.
• Collaborate with product owners, QA, DevOps, architects, and other developers in an Agile/Scrum environment.
• Review or understand existing Java services to help design replacement .NET services with improved architecture, scalability, and maintainability.
• Create and maintain technical documentation for APIs, services, architecture decisions, and deployment processes.
• Mentor junior developers and contribute to team learning, engineering standards, and continuous improvement.

Required Skills and Experience

• 5+ years of professional software development experience with C# and .NET.
• Strong experience with .NET Core / modern .NET.
• Experience designing and developing RESTful APIs and minimal APIs.
• Strong understanding of dependency injection, middleware, configuration, logging, validation, and modern .NET application structure.
• Experience designing microservices, service boundaries, and distributed systems.
• Strong understanding of Domain-Driven Design concepts and how to apply them to new application development.
• Experience with event-driven architecture, messaging patterns, asynchronous processing, and distributed communication.
• Hands-on experience with Entity Framework, code-first development, migrations, and ORM best practices.
• Strong relational database knowledge, including indexes, foreign keys, constraints, normalization, and query optimization.
• Experience with NoSQL databases and data modeling concepts.
• Experience with architecture and design patterns such as Repository, Unit of Work, CQRS, Mediator, Factory, Strategy, and Cle

  All qualified applicants will receive consideration for employment without regard to race, color, national origin, age, ancestry, religion, sex, sexual orientation, gender identity, gender expression, marital status, disability, medical condition, genetic information, pregnancy, or military or veteran status. We consider all qualified applicants, including those with criminal histories, in a manner consistent with state and local laws, including the California Fair Chance Act, City of Los Angeles' Fair Chance Initiative for Hiring Ordinance, Los Angeles County Fair Chance Ordinance, and San Francisco Fair Chance Ordinance.