Top Senior .NET Developer Jobs

Lead the design, development, deployment, and support of scalable .NET backend applications on Azure. Build microservices, REST APIs, and event-driven systems using Azure services, Docker, and AKS. Implement CI/CD pipelines and Infrastructure as Code, while improving reliability, security, observability, and performance. Troubleshoot complex production issues and collaborate with engineering, architecture, platform, and business teams.

Develops and maintains web applications and services using Microsoft .NET. Responsibilities include writing and reviewing code, troubleshooting issues, implementing requirements, supporting application deployment, documenting technical processes, and cross-training staff. The role supports federal law enforcement applications and requires recent production software development experience, ASP.NET or .NET Core expertise, code review, Agile delivery, and related application development experience.

Own and evolve Swyfft’s partner-facing insurance API, including resource design, versioning, backward compatibility, authentication, rate limiting, error handling, metrics, documentation, and contract testing. Build production C# code, maintain the translation layer between public APIs and internal systems, support partner integrations, and collaborate with QA and product. The role requires substantial public API experience, strong API security and multi-tenancy knowledge, and fluency in C#, ASP.NET Core, SQL Server, and Azure.

Develops, enhances, maintains, and supports enterprise web applications and services using C#, ASP.NET, and .NET Core. Responsibilities include translating requirements into technical solutions, reviewing and improving code, troubleshooting production issues, collaborating with multidisciplinary teams, and supporting builds, testing, releases, deployments, Agile sprints, documentation, and application modernization.

Leads a team of software engineers delivering scalable, resilient applications for healthcare payments. Responsibilities include end-to-end product delivery, architecture and system design, technical mentorship, .NET/C# development, SQL optimization, testing, operational stability, and SDLC execution. The role also drives responsible use of AI-assisted engineering tools, automation, security, agile practices, vendor evaluations, and cross-functional roadmap planning within a financial services environment.

Develop and maintain a large ERP system using .NET and C#, including front-end enhancements, back-end console applications, web services, and complex system integrations. Modernize legacy batch jobs into event-driven integrations on Boomi, collaborate in an Agile Scrum team, estimate and document development work, perform testing, troubleshoot issues, and support configuration change control. The role is onsite in Oklahoma City and requires U.S. citizenship.

Develop and support enterprise full-stack applications for a trust accounting and FinTech platform. Build .NET and C# backend services, SQL Server solutions, REST APIs, and modern web interfaces. Modernize legacy systems, troubleshoot production issues, and collaborate in an Agile environment. Design secure AI and LLM capabilities using prompt engineering, RAG, tool calling, and enterprise AI integrations while protecting financial data. Translate complex business requirements into scalable technical solutions and mentor less experienced developers.

Develop and maintain web applications using .NET, Angular, JavaScript, and related technologies. Build microservices, APIs, database schemas, automated workflows, and scalable integrations. Translate business requirements into technical solutions, manage SDLC and code promotion artifacts, support UAT, resolve defects, and maintain compliance. The role also involves application analysis, security recommendations, deployment automation, and collaboration with business and technology teams.

Designs, develops, maintains, and troubleshoots scalable software applications using .NET, SQL Server, UI frameworks, and cloud technologies. Collaborates with product owners, developers, testers, and technology leads; participates in code reviews; writes documented code; and improves software development practices.

Develop and maintain ASP.NET and .NET Core web applications and services. Translate business requirements into maintainable software, troubleshoot defects, test changes, support deployments, document technical work, and coordinate with business analysts, database staff, infrastructure teams, and customer stakeholders. The role is full-time onsite in Washington, D.C., may require occasional overtime or evening and weekend work, and is contingent on contract award.

Develop and maintain C# and .NET software using object-oriented design, testing, CI/CD, automation, and modern engineering practices. Analyze requirements, troubleshoot complex applications, participate in Scrum ceremonies, conduct code reviews, document technical solutions, and contribute to distributed systems, REST services, microservices, containerization, and AI-enabled projects. Provide technical guidance, collaborate across teams, and continuously improve development processes.

Develop and maintain enterprise applications across the full software development lifecycle. Build C#/.NET backend services and RESTful APIs, create frontend features using Angular or React, optimize SQL Server databases, write unit tests, troubleshoot issues, and apply secure, scalable development practices. Collaborate with technical and business teams in an Agile/Scrum environment while using source control, CI/CD pipelines, and automated deployment processes.

Design, develop, test, maintain, and support enterprise software applications using C#, .NET, ASP.NET Core, Web API, Entity Framework Core, and SQL Server. Responsibilities include translating requirements into maintainable code, integrating databases and external services, participating in code reviews and automated testing, troubleshooting production issues, improving performance, and collaborating with product, architecture, QA, and operations teams.

Develop and maintain full-stack web applications using .NET and React. Responsibilities include designing, coding, testing, deploying, and troubleshooting front-end and back-end components; implementing scalable APIs and application architecture; conducting unit, integration, and system testing; participating in code reviews; collaborating with cross-functional teams; and contributing to software development lifecycle improvements. The role requires active Top Secret clearance and at least eight years of experience.

Develops end-to-end .NET applications, automation solutions, microservices, user interfaces, databases, and APIs in an enterprise banking environment. Responsibilities include software design, implementation, testing, deployment, CI/CD, security, compliance, database development, systems integration, UAT, operational support, and defect resolution. The role collaborates with business and technical stakeholders, provides estimates and technical guidance, supports the full SDLC, and serves as a subject matter expert.

Leads the design, development, and implementation of secure, scalable enterprise applications. Responsibilities include architecture alignment, complex problem resolution, coding standards, testing, CI/CD, deployment, risk governance, and mentoring developers. The role requires deep expertise in C#, .NET, SQL Server, microservices, high-performance systems, containerization, and enterprise architecture, with preferred experience in messaging platforms, financial protocols, APIs, and Agile delivery.

Leads a team of up to 12 developers while designing and delivering enterprise full-stack applications. Responsibilities include developing .NET and Angular interfaces, architecting microservices and REST APIs, designing relational and NoSQL databases, managing SDLC compliance, supporting UAT, and advancing CI/CD and DevOps practices. The role also requires stakeholder collaboration, technical estimation, delivery coordination, project financial tracking, and mentoring within a regulated financial services environment.

Build and support complex features across C#/.NET back-end services and React front ends. Responsibilities include technical design, API and data modeling, secure and tested coding, production troubleshooting, code reviews, mentoring, documentation, and improving engineering practices. Collaborate with Product, QA, DevOps, Technical Leads, and architecture teams while balancing delivery, maintainability, performance, accessibility, observability, and security.

Develop, test, maintain, and support secure, scalable full-stack .NET applications in an Agile/Scrum environment. Responsibilities include API and database development, technical documentation, code and design reviews, SDLC compliance, security and audit adherence, collaboration with architects and business partners, mentoring junior engineers, leading project delivery, and participating in on-call support and occasional travel.

Design, develop, configure, customize, integrate, and support Microsoft Dynamics 365, Power Apps, Dataverse, and Power Platform solutions. Build scalable enterprise applications, automate business processes, develop Microsoft ecosystem integrations, troubleshoot defects, optimize performance, and support deployments. Collaborate with business and technical stakeholders on requirements, solution design, testing, documentation, governance, security, and production support. Apply .NET development experience while promoting maintainable low-code/no-code solutions and reusable components.

Design, build, and deliver scalable enterprise software for the Gehrimed EHR platform. Lead technical design and architecture decisions, troubleshoot complex issues, mentor engineers, collaborate across onshore and offshore teams, support Agile planning and delivery, track risks and metrics, and participate in rotational on-call support.

Develop and maintain secure C#/.NET applications and data integration solutions supporting VA healthcare modernization. Responsibilities include database and API development, troubleshooting, testing, performance optimization, Agile collaboration, CI/CD, application security, production support, and technical documentation. The role also evaluates AI-assisted development tools and LLM integrations for code generation, testing, data mapping, and migration workflows.

Develop and maintain secure C#/.NET applications and data integration solutions for a federal healthcare modernization project. Responsibilities include database development, REST/SOAP services, troubleshooting, testing, performance optimization, application security, deployment support, Agile collaboration, and documentation. The role also evaluates AI-assisted development and LLM integrations for code generation, testing, data mapping, and migration workflows. Candidates must support remote multidisciplinary teams and be eligible for a Public Trust clearance.

Develop and maintain secure, production-grade full-stack .NET applications across Azure, desktop, and mobile environments. Lead implementation decisions, establish coding and security standards, manage vendor deliverables, conduct code reviews, and collaborate with SQA on automated and manual testing. Build responsive Vue.js interfaces, integrate back-end services, maintain CI/CD pipelines, mentor developers, and reduce technical debt through architecture and design-pattern adherence.

Develop AI-powered agents and business automation solutions with Microsoft Copilot Studio, C#/.NET, and Azure. Build secure enterprise applications, REST APIs, integrations, workflows, and SQL Server solutions. Implement monitoring with Splunk, support CI/CD and automated testing, troubleshoot production issues, and collaborate with stakeholders and distributed teams. The role also involves Power Platform automation, technical design, documentation, secure development, and researching emerging AI technologies.