Top .NET Developer Jobs in Denver & Boulder, CO

The Senior Software Engineer develops and maintains Sports Trading applications using .NET and SQL Server, enhancing existing functions and providing technical guidance.

Develop enterprise software solutions by translating business requirements into technical designs, specifications, and code. Collaborate with architects, business analysts, and technical teams; follow technology and security standards; provide post-implementation support, application monitoring, and debugging; and evaluate emerging technologies. The role requires .NET, C#, IIS, REST, SQL Server, software lifecycle, integration, infrastructure, communication, and analytical skills.

Lead the architecture and delivery of scalable full-stack web applications using React and .NET/C#. Design cloud solutions on AWS, establish frontend standards, conduct code reviews, mentor developers, evaluate technologies, and collaborate with product, UX, QA, and DevOps teams. Own the software development lifecycle while promoting automated testing, CI/CD, cloud-ready architecture, and effective AI tool adoption.

Design, build, and maintain production-grade .NET web applications and APIs on Azure. Own full-stack delivery from data models and SQL to front-end components, CI/CD, testing, and architecture. Collaborate with product and delivery teams, participate in code reviews, and ensure secure, observable, well-tested services.

Develop and maintain web-based applications using .NET/C#, JavaScript, HTML/CSS, SQL and Oracle/SQL Server. Perform root cause analysis, collaborate with teams for requirements, follow Agile SDLC, present change demonstrations, and use Azure DevOps/Jira for lifecycle management. Implement and maintain Blazor components.

Senior .NET Web App Developer responsible for designing and building .NET web applications, implementing Oracle PL/SQL solutions, using Entity Framework and Blazor, applying design principles, producing technical documentation, performing performance tuning, and collaborating in Scrum/Agile teams with Bitbucket, JIRA, Tempo, and Confluence.

Senior .NET Software Engineer responsible for end-to-end software development using Microsoft technologies. Requires extensive experience in SDLC, design principles, technical documentation, web application development with .NET, Agile/SCRUM, Entity Framework, database design, and version control. Familiarity with project tools JIRA, TEMPO, Bitbucket, and Confluence preferred.

Design, develop, and maintain scalable .NET backend services, responsive React applications, SQL Server data solutions, RESTful APIs, and microservices. Collaborate with architects, product managers, and QA teams; participate in code reviews and architectural decisions; troubleshoot and optimize applications; and ensure security, scalability, and maintainability. The role also contributes to continuous improvement and may involve cloud platforms, CI/CD, containerization, and Agile development.

Design, develop, and maintain scalable full-stack enterprise applications using C#, .NET, ASP.NET, and Microsoft Azure. Build RESTful APIs and cloud services, modernize existing systems, troubleshoot production issues, and collaborate with technical and business stakeholders. Participate in architecture, code reviews, testing, deployment, and production support while following secure and maintainable development practices.

Develop modern applications using .NET/.NET Core with Database/SQL and Azure. Work remotely, troubleshoot proactively, and contribute to a distributed digital-nomad developer community.

Remote junior .NET developer to design, build, integrate, deploy, and provide production support for web applications serving housing programs. Responsibilities include data/business analysis, developing reports, QA testing, writing documentation and user guides, gathering requirements, creating mock-ups, and configuring application deployments.

The C# / .NET Developer will design and maintain middleware applications, build Shopify integrations, and support a mobile app backend in a remote work environment.

Develop and maintain InfoTrack's cloud-based web solution: build backend C#/.NET services, integrate third-party SOAP/REST APIs, design databases, implement full-stack features (React/JS), follow microservices patterns, write tests, collaborate in Agile teams, and recommend product and usability improvements.

Develop and architect scalable cloud-based software for an IoT asset-tracking platform. Responsibilities include translating business requirements into technical designs, leading complex feature development, mentoring engineers, conducting code reviews, promoting engineering best practices, evaluating distributed-system trade-offs, and collaborating with product, operations, and customer success teams.

Lead hands-on architecture and development for a cloud-based IoT asset-tracking platform. Design scalable distributed systems, APIs, data models, and platform components; resolve complex performance and reliability challenges; and champion testing, CI/CD, observability, and security practices. Lead an agile engineering team, manage delivery, mentor and hire engineers, collaborate with Product and Operations, and drive adoption of AI development tools and AI/ML capabilities.

Develop full stack enterprise-level applications, create responsive websites, and manage databases (MS SQL & MongoDB) as a .Net Developer.

Build and maintain scalable, cloud-native APIs using .NET. Enhance core platform components, lead architecture and testing discussions, optimize telemetry and performance, collaborate cross-functionally, conduct code reviews, and mentor team members.

The Senior .NET Software Engineer will drive development of .NET software products, focusing on back-end engineering, code reviews, and collaborating with cross-functional teams.

As a Senior Software Engineer at PerfectServe, you'll design, build, and maintain high-quality code for healthcare communication systems, mentoring junior engineers and collaborating across teams to improve patient care and clinical workflows.

The Senior .Net Developer will enhance SDG's C#/.NET Core codebase, design high-load services, and optimize MS SQL queries, benefiting from a remote work environment and attractive benefits.

Senior backend-focused software engineer building modern SaaS ERP products for local governments. Responsibilities include designing REST APIs, domain logic, data models, background workflows, and secure auditable systems using C#/.NET, ASP.NET Core, EF Core, SQL Server, and Azure. The role owns capabilities from discovery through deployment and production support, contributes to testing, CI/CD, observability, architecture, code reviews, mentoring, and modernization of legacy applications.

The role involves full-stack software development, adhering to Agile practices, and collaborating across teams. Responsibilities include coding, testing, and maintaining software systems while mentoring team members.

As a Senior Software Developer, you'll design, build, deploy, and support web applications using the .NET stack and Azure, while collaborating with a team.

Seeking a Senior Software Developer to design, build, deploy, and support web applications using the .NET stack and other technologies in a collaborative team environment.

The Senior Full Stack Engineer will modernize legacy systems to microservices, maintain .NET applications, optimize SQL databases, and develop frontend interfaces.