Top Senior .NET Developer Jobs

Develop and maintain scalable full-stack web applications using Angular, C#, .NET, Node.js, and related technologies. Collaborate with cross-functional teams, deliver new features, optimize performance, resolve defects, maintain code quality and automation, and mentor junior developers. The role requires database, API, cloud, and modern development experience, along with strong communication and problem-solving skills. U.S. citizenship and an active Secret clearance are required.

Develop and support scalable enterprise full-stack applications using C#/.NET and AngularJS. Collaborate with business and technical stakeholders, design and review solutions, build APIs and applications, maintain technical documentation, mentor junior teams, and apply modern architectural patterns including microservices, secure APIs, and cloud technologies.

Develop and maintain sports trading and tools applications and platforms using .NET, C#, and SQL Server. Build scalable, low-latency, highly available software handling high-volume real-time data. Support existing 24/7 trading systems, perform root-cause analysis, collaborate with product owners and testing teams, contribute to solution proposals and estimates, and mentor technical team members. The role will also expand into Golang, React, and Google Cloud Platform.

Develop and configure Microsoft Dynamics 365 solutions across enterprise systems. Responsibilities include configuring entities, forms, workflows, and usability features; building Power Platform automation, reporting, and integrations; creating C# plugins; developing .NET applications and APIs; troubleshooting integrations; and collaborating with stakeholders, vendors, developers, architects, and analysts.

Develop and maintain scalable enterprise systems, including loan origination, servicing, and customer-facing applications. Design APIs, middleware, integrations, and secure backend services; participate in code reviews, architecture discussions, automation, CI, legacy modernization, troubleshooting, and performance tuning. Collaborate across teams in an Agile and DevOps environment while mentoring peers and promoting modern development practices.

Develop and maintain business-critical investment applications for private equity, private placements, and real estate operations. Translate business requirements into software modules, collaborate with stakeholders, apply disciplined development and QA practices, test and implement changes, maintain applications, and resolve support issues. The role requires .NET and C# development, SQL expertise, client communication, project planning, and the ability to work effectively across teams in a hybrid Hartford environment.

Designs, develops, configures, tests, and supports EDIFECS-based healthcare EDI systems and clearinghouse platforms. Maintains ANSI X12N 5010 mappings, ETL platforms, firewall rules, releases, alerts, and system configurations across Medicaid implementations. Translates requirements into technical solutions, supports SDLC and CMMI practices, performs troubleshooting and compliance validation, and contributes to Agile/Scrum ceremonies. Develops secure .NET applications using C#, web technologies, databases, Azure DevOps, and CI/CD practices.

Leads the design, implementation, and lifecycle management of large-scale, highly available software systems. Guides cross-functional teams, defines technical solutions, mentors experienced engineers, drives engineering best practices, and promotes innovation, automated testing, CI/CD, code quality, and operational reliability. Evaluates emerging technologies and AI tools to improve software efficiency, scalability, and performance.

Develop and support full-stack web applications for Source-to-Pay business processes. Responsibilities include designing .NET solutions, developing front-end and back-end functionality, integrating RESTful services and databases, troubleshooting production issues, testing, documenting, supporting users, participating in architecture and code reviews, and mentoring junior developers. The role requires collaboration with business stakeholders and ownership of development projects.

Develop, test, deploy, maintain, and support enterprise software applications for a government customer. Responsibilities include designing application architectures, building front-end, business logic, REST API, and database components, creating Power BI reports, automating testing with Selenium, troubleshooting production issues, and assisting with deployments, configuration, upgrades, and documentation in an Agile Kanban environment.

Develop and maintain applications using C#, ASP.NET MVC, .NET Core, SQL Server, JavaScript, jQuery, and HTML. The role requires strong database development, communication, documentation, and collaboration skills. Candidates must be local to Richmond, attend an onsite interview, and participate in occasional onsite meetings. Agile experience is preferred, along with familiarity with GitLab, DevSecOps, Azure Cloud, Microsoft 365, or Power Platform.

Lead development of secure, scalable digital banking software across front-end and backend systems. Design Angular or React applications, build APIs, optimize SQL performance, integrate third-party platforms, improve code quality, implement testing strategies, and mentor engineers. Collaborate with cross-functional teams in an Agile environment while supporting cloud-native practices, regulatory compliance, and continuous product improvement.

Develop and optimize Azure SQL and SQL Server databases, including queries, stored procedures, indexing, triggers, data warehousing, and ETL. Build and maintain AI agents using autonomous and multi-agent architectures, prompt engineering, and RAG pipelines. Support Azure App Services and C# .NET applications, troubleshoot performance issues, lead database projects, mentor junior developers, and document technical solutions.

Develop and maintain .NET and C# web applications using MVC and IIS on Windows Server. Perform software testing, SQL stored procedure development, SDLC activities, defect tracking, technical documentation, and mentoring of junior personnel. Requires an active TS/SCI clearance with CI polygraph and eligibility for additional clearances.

Designs, develops, and maintains high-quality .NET applications using .NET 8, React, TypeScript, SQL Server, microservices, and containerized architectures. Provides technical designs, establishes development and deployment standards, collaborates with product owners and Agile teams, resolves complex technical issues, performs code reviews, and mentors developers. Requires expertise in C#, APIs, databases, testing, CI/CD, Git, Docker, Kubernetes, and experience in banking, finance, or trading.

Develop and maintain scalable enterprise web applications using React, JavaScript or TypeScript, C#, and .NET. Build responsive interfaces, backend services, REST APIs, and microservice integrations. Design Azure cloud solutions, support CI/CD deployments, participate in architecture and code reviews, troubleshoot applications, and collaborate with stakeholders, QA, product owners, and developers in an Agile/Scrum environment.

Develop and maintain scalable .NET software and platforms for healthcare scheduling and workforce management. Design microservice architectures, apply domain-driven design, and advise on technical decisions. Build automated tests, monitor infrastructure, support CI/CD, and improve reliability and performance. Collaborate with product, data, business, and engineering teams while mentoring developers, documenting systems, participating in Agile ceremonies, and driving technical standards and excellence.

Develop and maintain middleware platforms for the myQ residential and commercial products. Translate product requirements into technical designs, lead Agile development and offshore teams, manage codebase changes and technical debt, ensure coding standards and security compliance, and collaborate with product, architecture, infrastructure, database, QA, and firmware teams. Mentor engineers, participate in technical reviews, troubleshoot issues, document solutions, and support project estimation and progress reporting.

Supports, troubleshoots, maintains, and enhances deployed warehouse automation software in customer environments. Develops patches and maintenance releases, diagnoses production issues, performs coding and testing, supports upgrades and migrations, monitors performance, documents solutions, collaborates with engineering and field teams, and provides occasional customer-site and after-hours support. Mentors junior engineers and contributes to reliable operation of mission-critical material handling systems.

Design, develop, and deliver scalable .NET back-end and front-end solutions within an Agile, DevOps-oriented team. Lead technical design, code reviews, testing-first practices, CI/CD pipelines, containerized deployments, and ensure non-functional requirements (security, performance, scalability, maintainability). Mentor peers and collaborate across product, design, and architecture to produce high-quality software.

Develop and maintain full stack web applications using .NET. Design and implement microservices on Azure, and manage APIs using Azure API Management. Collaborate on architecture and deliver production-ready services for a San Ramon, CA based full-time role requiring significant hands-on experience.

Owns the design, development, testing, deployment, and maintenance of production software. Builds C#/.NET backend services, Angular web applications, and .NET MAUI mobile apps; optimizes SQL Server databases; resolves production issues; improves reliability, security, performance, and observability; writes tests and documentation; participates in code reviews; and translates ambiguous business needs into maintainable technical solutions.

Design, build, and maintain reliable enterprise web applications and services using C#, .NET, SQL Server, Vue.js, and some C++. Optimize transactional databases, troubleshoot cross-layer production issues, modernize legacy systems, deliver jurisdiction-specific changes, and support testing and CI/CD improvements. Collaborate with QA and product teams, conduct code reviews, mentor engineers, and deploy and operate services in Azure while meeting reliability, security, and compliance requirements.

Build scalable backend-heavy services and applications using C# and .NET, while contributing to Angular and TypeScript UI development. Design and develop REST APIs and microservices, work with relational databases, implement automated testing and CI/CD, and ensure system security, scalability, and performance. Preferred work includes event-driven architectures, messaging systems, NoSQL databases, caching, search technologies, and mentoring engineers or leading technical initiatives.

Develops, implements, maintains, and supports MES software and infrastructure in a manufacturing environment. Responsibilities include C# and ASP.NET development, MES integrations, shop monitoring applications, reporting, hardware and software installation, network and system maintenance, troubleshooting, documentation, user training, and production stability. The role also designs and manages scalable Kubernetes clusters and automation scripts for provisioning and administration.