Top Senior .NET Developer Jobs

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.

Develop and support enterprise analytics and software solutions across the full development lifecycle. Responsibilities include requirements analysis, technical design, .NET and cloud development, troubleshooting, testing, documentation, production support, and consultation with stakeholders. The role requires expertise in C#, ASP.NET Core, Blazor, Azure serverless technologies, infrastructure as code, REST APIs, microservices, CI/CD, DevOps, and secure cloud-native architecture.

Develop and modernize legacy web applications by remediating security vulnerabilities, migrating systems to .NET 8+ on AWS, and applying secure coding standards. Responsibilities include refactoring applications, resolving defects, developing and deploying web services, addressing penetration-test and automated-scan findings, and supporting phased deployments. The role requires strong C#, VB.NET, and VB6 experience, relational database knowledge, fluent English, and availability during US time zones.

Leads software engineering for Azure cloud-native banking applications, writing secure and resilient code, reviewing designs and pull requests, improving testing and performance, guiding architecture, and coaching developers. Drives Agentic AI adoption across the software development lifecycle while ensuring regulatory compliance, risk controls, operational excellence, and effective stakeholder communication.

Design, develop, and maintain cloud-based software using .NET and C#. Collaborate with international teams throughout the software development lifecycle, including architecture, coding, testing, deployment, feature development, and bug fixes. Apply clean-code principles and pragmatic design practices. Support containerized deployments with Docker and Kubernetes, and coordinate effectively across multisite development teams.

Lead the design, development, and implementation of enterprise applications using C# and .NET Core. Build secure REST APIs, Azure cloud solutions, database schemas, and optimized SQL queries. Manage CI/CD pipelines, Docker containers, and Kubernetes deployments. Troubleshoot cloud and application issues, participate in Agile ceremonies, and provide technical leadership while collaborating with technical and business stakeholders.

Leads architecture and development of complex backend services for a commercial health plan platform. Designs .NET Core and Azure systems, develops claims, eligibility, and benefits functionality, manages healthcare data integrations, and owns cloud infrastructure and CI/CD architecture. Provides technical leadership through code reviews, testing standards, mentoring, and architecture decisions while ensuring performance, reliability, security, and regulatory compliance.

Designs, develops, tests, deploys, and manages .NET full-stack applications supporting FBI IT infrastructure. Responsibilities include integrating third-party components, enhancing existing code, automating operations and maintenance, large-scale data processing, statistical modeling, advanced analytics, and full software development lifecycle participation. The role also conducts architecture reviews, milestone reviews, resource estimation, process improvement, quality assurance, and team mentoring.

Develops, tests, and maintains complex mobile and web applications, database integrations, and data repositories. Gathers requirements, performs systems analysis and design, researches technology alternatives, and supports technical architecture standards. Collaborates with architects, developers, analysts, business experts, and leadership to deliver strategic solutions. Advises management on technology direction, standards, policies, and problem resolution while documenting solutions and supporting organizational applications.

Develop and maintain resilient banking applications using C# and .NET within SDLC standards. Responsibilities include requirements analysis, application design, coding, pull request and code reviews, source control, deployment, Azure modernization, data migration, stakeholder collaboration, and technical documentation. The role supports application stability, risk controls, audits, and regulatory requirements, while participating in Agile teams and an on-call rotation.

Modernize legacy Java and .NET applications by analyzing dependencies, preserving APIs and business behavior, building compatibility adapters, refactoring services, and supporting migration, testing, deployment, cutover, and retirement. The role also requires secure DevSecOps practices, documentation, production troubleshooting, stakeholder communication, and protection of classified and Controlled Unclassified Information in government environments.

Develop and optimize Microsoft .NET applications, legacy systems, and microservices with a focus on performance, scalability, reliability, and observability. Responsibilities include code reviews, performance testing, CI/CD integration, architecture and sprint delivery, legacy code and SQL tuning, cloud application deployment on Azure, automated testing, and resolving customer issues. The developer collaborates with architects, QA, technical support, and cross-functional teams using SAFe Agile practices.

Design, develop, test, maintain, and document web applications for Life Sciences manufacturers. The role involves full-stack development with .NET, C#, databases, APIs, progressive web applications, cloud-native technologies, automated testing, CI/CD, and containerization. The developer collaborates with product engineering, marketing, and other teams to understand client needs, deliver features, improve existing products, and support next-generation software solutions.

Develop and support enterprise applications, reporting, and integration solutions for financial, healthcare, insurance, and mortgage clients. Responsibilities include designing data models, building SSIS batch integrations, implementing IBM MQ and .NET real-time integrations, creating SSRS reporting solutions, and supporting order management systems. Candidates need strong ASP.NET, C#, .NET, SQL Server, enterprise data management, software design, and Agile delivery experience, plus substantial asset management experience.

Design and deliver scalable full-stack applications using .NET/C#, React, SQL Server, and Microsoft Azure. Responsibilities include building APIs and responsive interfaces, optimizing databases, deploying and monitoring cloud applications, applying secure coding and testing practices, troubleshooting production issues, documenting technical solutions, participating in code reviews, and collaborating with stakeholders. The role also supports other developers and contributes to architecture, code quality, and cloud practices.

Designs and delivers scalable full-stack applications using .NET, C#, React, SQL Server, and Azure. Responsibilities include building APIs and responsive interfaces, optimizing databases, deploying and monitoring cloud applications, applying secure coding and testing practices, reviewing code, mentoring developers, translating business requirements, troubleshooting production issues, and documenting technical solutions.

Leads the design, development, testing, integration, and support of enterprise software using Microsoft Power Platform and Azure. Builds Power Apps, workflows, Dataverse solutions, REST integrations, custom APIs, and secure cloud applications. Drives software engineering standards, ALM, CI/CD, DevSecOps, architecture, troubleshooting, and continuous improvement. Partners with business and technical stakeholders, mentors engineers, conducts research and demos, and delivers scalable solutions for enterprise maintenance modernization.

Develops and maintains custom software applications using .NET technologies. Responsibilities include software design, coding, debugging, testing, troubleshooting, and participation throughout the software development lifecycle. The role works independently and collaboratively on moderately complex projects, may guide other engineers, and requires expertise in web-based and client/server systems. Some travel, up to 15%, is expected.

Design, develop, deploy, and support secure, scalable cloud-native applications using .NET, C#, Angular, Azure, and SQL Server. Build APIs, backend services, integrations, and user interfaces; optimize databases and application performance; troubleshoot production issues; apply enterprise security practices; and support the full software lifecycle. The role also establishes technical standards, mentors developers, collaborates with cross-functional teams, and uses AI-assisted development tools to improve productivity, testing, documentation, and code quality.

Develop and maintain enterprise web and desktop applications using the Microsoft .NET stack, including ASP.NET, C#, JavaScript, and SQL Server. Perform unit testing, troubleshooting, performance tuning, and scalable application design. Participate in Agile software development lifecycle activities, create technical documentation and models, and improve development frameworks, standards, and processes.

Develop front-end interfaces for entering rates into a SQL Server backend. Collaborate with web and database developers on a critical Wells Fargo project. Responsibilities include C# and ASP.NET MVC development, Entity Framework implementation, software architecture, test-driven development, dependency injection, design patterns, JavaScript development, T-SQL, database design, and clear technical communication.

Designs, develops, tests, implements, and documents web and console applications using .NET technologies. Translates functional requirements into technical designs, partners with architects and infrastructure teams, applies architectural standards and design patterns, and provides technical leadership in a fast-paced environment.