Top .NET Developer Jobs

Develop scalable full-stack applications, APIs, services, and responsive user experiences using .NET and React. Collaborate with architects, designers, product managers, and engineers throughout the product lifecycle. Participate in technical design, architecture, code reviews, automated testing, documentation, deployment, and continuous improvement while ensuring security, performance, scalability, reliability, and maintainability. Work within an Agile, DevOps-oriented team and contribute to observability, integrations, and peer coaching.

Develops and maintains .NET applications using C#, Microsoft SQL Server, unit and integration testing. Responsibilities include building features, fixing bugs, debugging across the application stack, making maintainability and performance decisions, researching solutions, communicating design choices, and collaborating with engineering peers. The role requires approximately 2–3 years of C# and MSSQL experience, Agile development experience, and a bachelor's degree or equivalent practical experience.

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.

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.

Develop and maintain scalable .NET applications, backend services, and REST APIs supporting cloud-based email hosting and Microsoft 365 integrations. Responsibilities include modernizing legacy systems, troubleshooting production issues, optimizing performance, participating in code reviews, and collaborating with product, QA, DevOps, and engineering teams. The role also involves writing tested code, supporting reliable distributed services, and adopting AI-assisted development practices.

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.

Develop, test, deploy, and support .NET applications, Azure services, and Dataverse model-driven Power Apps. Build containerized microservices, plugins, Power Automate flows, Power BI reports, and dashboards. Analyze existing applications, recommend improvements, write automated tests, participate in Agile planning and client sessions, and maintain development, testing, and production environments.

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.

Design, develop, test, secure, and maintain enterprise applications and APIs using C# and modern .NET. Build database solutions, RESTful integrations, automated tests, and CI/CD pipelines while supporting Agile and DevSecOps delivery. Modernize legacy applications, troubleshoot production issues, conduct code and design reviews, and remediate security findings. The role requires an active DoD Secret clearance and U.S. citizenship and is remote within the United States during Pacific Standard Time hours.

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.

Design, build, deploy, and support enterprise-grade web applications and distributed systems using Microsoft technologies. Responsibilities include developing C# and .NET APIs, modern front-end applications, SQL Server solutions, cloud-integrated services, and scalable architectures. The role also involves code reviews, troubleshooting, performance optimization, CI/CD, cloud deployment, security, observability, and operational reliability. Preferred experience includes microservices, containers, distributed systems, automated testing, and DevOps pipeline management.

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.

Build and maintain distributed, API-driven software for CoStar’s real estate data platform. Responsibilities include developing AI-powered solutions, integrating agents and intelligent workflows, improving observability and diagnostics, designing telemetry-driven systems, and delivering robust C#/.NET applications. The role also involves data modeling, code reviews, emerging technology evaluation, and collaboration in an agile environment.

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, deploy, and support enterprise integration solutions using C#, .NET, Azure, APIs, microservices, middleware, and Azure Service Bus. Integrate SAP, Dynamics 365 CRM, IVR systems, databases, payment gateways, and traffic management platforms. Build secure, scalable, high-volume data exchanges, troubleshoot production issues, document technical solutions, and support implementation and post-go-live activities, including scheduled onsite work in Middletown, Pennsylvania.

Designs, develops, deploys, and supports enterprise integration solutions using .NET, C#, Azure, middleware, APIs, and microservices. Integrates CRM, SAP, IVR, payment gateways, and external systems, while supporting secure, high-volume transaction processing and data transformation. The role focuses on complex tolling projects and requires expertise in Azure integration services, including Functions and Service Bus.

Develop and support full-stack software applications using .NET technologies, C#, VB.NET, Web API, RESTful services, JavaScript, WPF, and SQL Server. Responsibilities include writing scalable code, participating in code reviews and technical discussions, collaborating with a technical lead, providing Tier 3 support, and contributing to customer project work. The role also involves applying design principles, meeting delivery objectives, and continuously improving software quality.

Develops, tests, debugs, maintains, and installs complex financial software applications using .NET technologies. Translates technical and functional specifications into software designs, resolves architectural issues involving scalability, performance, reliability, usability, and security, and contributes to technical standards and planning. The role also involves automated testing, secure coding, source control, and collaboration on application enhancements and integrations.

Lead development of enterprise-grade .NET web applications and distributed systems across the full engineering lifecycle. Responsibilities include architecture, hands-on C# and .NET implementation, scalable API and front-end development, code reviews, cloud deployment, debugging, performance optimization, security, observability, and post-release support. The role uses Azure or AWS and may involve microservices, containers, automated testing, and DevOps pipeline management.

Develops, maintains, and enhances C# and .NET business applications, including ERP, WMS, EDI, BI, mobile, and web systems. Writes SQL queries, builds integrations with databases and Microsoft Dynamics 365 Business Central, troubleshoots issues, tests fixes, and documents technical solutions. Collaborates with business users and technical teams to translate requirements into software. The role requires professional C# experience, SQL and object-oriented programming knowledge, application debugging skills, and occasional domestic and international travel.

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, test, debug, and enhance software solutions for a federal customer. Integrate design requirements, resolve compatibility issues, research emerging technologies, produce technical documentation, troubleshoot applications, and prepare analytical progress reports.