Top Remote C# Jobs in Washington, DC

Design, develop, and maintain automated test frameworks for front-end and web services. Integrate tests into CI/CD, write unit/component/integration/performance tests, debug front-end and APIs, collaborate with Agile teams, and drive testability, code quality, and release reliability.

Lead design and implementation of scalable full-stack web applications using Vue.js front-end and .NET back-end. Provide architecture, hands-on development, mentorship, CI/CD and testing, collaborate with product and UX, optimize databases and ensure performance, security, and maintainability.

Design, develop, and maintain high-performance web applications and WebAPIs using .NET 6 and React. Build scalable, reliable services, optimize performance, troubleshoot defects, and collaborate with product and development teams. Use Azure platform services, NoSQL/SQL databases, CI/CD pipelines, and propose continuous improvements.

Design and enforce architecture and engineering best practices for Azure-based microservices. Create solution artifacts, ensure code quality, implement containerized deployments (Docker/AKS), integrate cloud services, secure SSO/auth, and provide technical leadership.

Lead architecture and development of scalable REST-based microservices using .NET 6+, ASP.NET and C#. Drive API design, documentation, CI/CD with Azure DevOps, Azure deployments, event-driven integrations, testing (xUnit/NUnit), and mentor engineers while ensuring performance, security (JWT/OAuth/SAML), and observability for large eCommerce systems.

Design, build, and modernize cloud-native applications on Azure (AKS, App Services, Functions). Maintain and enhance legacy React/.NET applications, develop REST APIs, monitor performance, and migrate .NET apps to microservices. Act as subject-matter expert in asset management, communicate with stakeholders, and support full-stack development across frontend and backend technologies.

Design and implement enterprise Sitecore solutions, lead architecture, integrate with third-party systems, optimize performance and security, provide technical leadership, and mentor development teams to deliver scalable, high-quality software.

Design, develop, and maintain automated test frameworks for front-end and web services. Integrate tests into CI/CD, write unit/component/integration/functional/performance tests, debug front-end and API issues, collaborate with Agile teams, and improve test coverage, release velocity, and production health. Work uses Groovy/Geb and Java/HttpClient and may involve contact center integration.

Design, develop, and maintain scalable ASP.NET/C# APIs and microservices and front-end interfaces (Vue.js, AngularJS) for retail omni-channel and POS platforms. Contribute to architecture, write production-quality code, troubleshoot issues, participate in code reviews, and collaborate with product, design, and QA to deliver features with minimal onboarding.

Design, develop, deploy, and maintain backend components and large-scale cloud-based systems. Write tests, perform code reviews, debug, and collaborate with cross-functional teams to build scalable APIs, microservices, and reliable production software in an agile environment.

Design and deliver scalable, secure enterprise applications on the Microsoft stack (.NET 6+, ASP.NET Core, C#). Architect microservices/APIs, integrate with hospitality and gaming systems, guide front-end (React/Angular) and mobile development, implement CI/CD (Azure DevOps/GitHub Actions), ensure performance, compliance, and high availability, and collaborate with cross-functional and offshore teams.

Lead a team of .NET developers providing technical and architectural leadership across .NET-based applications. Drive design decisions, enforce coding standards, plan and estimate work, perform code reviews, mentor developers, troubleshoot complex issues, and collaborate with product and project teams to deliver scalable, secure microservices and APIs.

Design, build, and operate backend systems for a mortgage lending platform. Own backend responsibilities from design through production, focusing on scalability, performance, reliability, and multi-service architectures while collaborating with product and full-stack engineers.

Join an early-stage platform team to scale and mature a mortgage origination platform. Work across the stack to improve distributed systems, performance, observability, and infrastructure tooling, and help define engineering standards and frameworks for growth.

Build and scale the platform infrastructure to support mortgage origination: design cloud architecture, deploy and operate Kubernetes-based systems, manage databases, implement observability and incident response, and create internal developer tooling to improve reliability and engineering velocity.

Build and maintain full-stack features on a product-oriented team, owning product areas end-to-end. Ship customer-facing functionality, design and optimize data models and schemas, work with React state management, relational databases, cloud services, event streaming, caching, and AI tools. Collaborate cross-functionally, take high ownership, and occasionally support mission-critical work outside normal hours.

Design, develop, and deliver scalable backend systems and components using .NET 10 and C#. Build and maintain databases and messaging infrastructure (PostgreSQL/SQL Server, RabbitMQ), deploy with Docker and AWS, apply DDD and ORMs, triage/prioritize work, and contribute to distributed, event-driven architecture with emphasis on reliability and idempotency.

Develop, configure, integrate, and operationalize command-and-control (C2) and Common Operating Picture (COP) applications. Build workflow automation, event management, alerting, data fusion, dashboards, and operator-focused UX. Support testing, interoperability validation, demonstrations, and operational readiness while collaborating with systems engineering and stakeholders.

Lead technical direction for a major product domain, reduce architectural debt, mentor engineers, standardize AI-agent workflows, and design scalable backend solutions integrating LLMs and cloud services. Drive cross-team RFCs, cookbook standards, and adopt agentic AI tooling while balancing security, quality, and delivery.

Design, build, and operate highly scalable cloud-native microservices and web applications. Own features from design through production, improve observability, CI/CD, and cloud infrastructure, mentor teammates, collaborate across teams, and leverage AI developer tools to automate and accelerate engineering workflows.

Design, implement, and test full-stack solutions using object-oriented principles and TDD. Collaborate with cross-functional teams to deliver front-end and back-end components, produce technical designs, estimate effort, and adopt best practices.

Design, implement, and optimize gameplay mechanics and systems. Collaborate with designers, artists, and developers to troubleshoot and refine code, optimize performance across platforms, and maintain clean modular code while staying current with game technologies.

Lead design, build, deploy, and maintain PKI and key management API services for vehicle ecosystems. Own end-to-end lifecycle including HSM integration, certificate issuance/rotation/revocation, secure REST APIs, cloud/on-prem Kubernetes deployment, monitoring, and compliance. Mentor engineers, drive architecture, work with customers and embedded teams, and author security requirements and documentation.

Provide hands-on support for the Mphasis Javelina platform and legacy systems, troubleshoot production and data issues, modernize AS400/finance applications using C#/.NET, automate and maintain reporting and SQL processes, manage accumulator and claims data loads, and develop operational documentation and runbooks to improve reliability and reduce manual work.

Lead hands-on design, development, testing, deployment, and support of firm-wide Revit automation and engineering tools. Own the automation roadmap, build integrations with Autodesk products and data sources, establish development standards, monitor adoption and reliability, and provide technical mentorship and code review to other developers.