Top Remote C# Jobs in Washington, DC

Lead design and delivery of scalable, reliable software using C#/.NET, SQL Server, React, and Azure. Own complex initiatives from design through operations, mentor engineers, improve CI/CD, observability, and apply DDD/TDD/VSA practices. Use modern APIs, microservices or modular monoliths, and AI-assisted tooling to improve delivery.

Design and scale high-performance Ethernet and InfiniBand fabrics for hyperscale AI training clusters. Develop ROCE transport and congestion-control mechanisms, topology and routing strategies, telemetry and observability, cluster bring-up, benchmarking, tuning, and cross-vendor co-design to enable low-latency, lossless networks at 10k–100k+ GPU scale.

Work with customers and cross-functional teams to design, build, and deliver cloud-based solutions. Lead design, identify dependencies, mentor engineers, act as DRI and on-call, and improve availability, reliability, observability, and performance. Contribute to open-source assets and collaborate with Microsoft product teams to produce extensible, maintainable code and scalable solution patterns.

Design and implement scalable first-mile networking solutions for Microsoft 365 Substrate and COSMIC. Drive design, dependency identification, coding, optimization, debugging, and on-call monitoring. Analyze production telemetry to improve reliability, performance, and observability. Act as a DRI, lead design and release plans, and collaborate with stakeholders to meet product requirements at global scale.

Design, build, deploy, and operate backend services, APIs, integrations, and web applications. Own end-to-end features, improve CI/CD and observability, troubleshoot cross-service issues, participate on-call, and collaborate with product and leadership to deliver reliable production systems.

Join Azure PostgreSQL to design, implement, and test relational database engine features (query processing, logging, recovery, IO, scale-out). Contribute to code, review, testing, and compliance activities while learning AI-enabled SDLC practices, monitoring systems as a designated owner, and collaborating within an inclusive engineering team.

The Senior C# Developer will lead AI enablement by transforming APIs into an Agent Mesh using C# and the MCP, ensuring secure AI interactions through Gravitee management.

Lead a team responsible for payments and finance development, focusing on API integrations, security compliance, and team productivity improvements.

As a Windows Engineer at Upwind, you will develop security modules, lead projects from inception to production, and collaborate across teams.

Leading a software engineering team, overseeing design and implementation phases, ensuring adherence to development standards, and collaborating with cross-functional teams.

Seeking a Senior Full Stack .NET Developer to work on a social good project, with strong skills in C#, AngularJS, design, and UX. Requires 5+ years of experience.

Own and resolve complex, recurring trader-impacting issues by reproducing, diagnosing, and shipping code fixes. Write backend C#/.NET and React front-end code, build admin tooling, improve observability, lead incident response and post-incident reviews, and partner across engineering, QA, Cloud Ops, and Product to reduce recurring support toil.

As a Principal Software Engineer, you will architect AI-enabled systems, mentor teams, and guide technical decisions for scalable products.

The Test Automation Engineer will develop automated testing frameworks for Esri software, execute tests, manage defects, and ensure compliance with federal standards.

Lead enterprise architecture for client reporting programs: set strategy for cloud data platforms, end-to-end pipelines, integrations, governance, and delivery. Guide program planning, chair governance, mentor teams, drive best practices, and commercialize client reporting offerings. Act as senior advisor to clients and accountable owner for architecture and delivery excellence.

The Associate Staff Engineer will lead automation testing efforts utilizing various tools and frameworks while mentoring teammates and implementing agile practices.

The Staff Engineer will leverage 5+ years of experience in C#, JavaScript, and frameworks to lead and innovate solutions in a collaborative environment.

As a Senior Full-Stack Engineer, you will design and deploy solutions for state governments, ensuring high standards of security and privacy while leading cross-functional teams.

Lead and architect automated test strategies and frameworks for web and mobile apps. Mentor test engineers, develop and maintain automated tests (API, integration, regression, performance), integrate with CI/CD, execute end-to-end and manual tests as needed, manage defects and metrics, and collaborate with Agile teams to ensure software quality across platforms and devices.

Lead design, development, and maintenance of cloud hosting management and orchestration solutions. Mentor engineers, review code for quality and security, design REST APIs, troubleshoot issues, improve performance and reliability, and drive requirements and architecture decisions to enhance customer experience.

Lead backend development using C#/.NET and cloud-native technologies. Build and maintain APIs, ensure quality and performance, troubleshoot issues, conduct code reviews, and drive software/process improvements.

Lead and mentor a distributed team building a realtime, cross-platform renderer. Drive delivery, technical strategy, and engineering practices; collaborate with R&D, product, and integrations to turn neural-rendering research into production-quality, high-performance rendering across web, mobile, desktop, and headset platforms.

Design and build cloud-native, highly available systems and serverless applications on Azure. Implement Infrastructure-as-Code, develop TypeScript/React/NestJS applications, create APIs for web/mobile/IoT, write automated tests, deploy frequently, and participate in production support and on-call rotations while working in agile teams.

Design, build, test, deploy, and maintain responsive web applications and back-end services for mortgage origination, servicing, sales, and operations. Create and optimize RESTful APIs, integrations, databases, and reusable UI components; ensure security, accessibility, performance, and CI/CD-driven delivery while collaborating with stakeholders and participating in Agile processes.

Senior individual contributor responsible for designing and building complex, customer-facing product features. Own technical decisions within product areas, collaborate with Product and Design, contribute to architecture, maintain code quality, mentor engineers, and participate in production support.