Top Remote C# Jobs in Washington, DC

Build and maintain high-scale backend systems and APIs for a 24/7 sports betting platform. Deliver production-ready code, own services end-to-end, resolve production incidents, optimize performance, and mentor peers while collaborating with product and architecture teams.

Own reliability, automation, and DevOps for Coinbase's corporate IAM platform: on-call/incident response, CI/CD and IaC pipelines, identity lifecycle tooling, observability and disaster recovery, documentation, and cross-team IAM advisement to ensure secure, scalable access for a global workforce.

As a Lead Software Engineer, you'll design and develop GenAI platforms, integrate LLMs, mentor engineers, and solve technical challenges for scalable solutions.

The Staff Software Engineer will enhance video capabilities, support live streaming and storage infrastructure, and collaborate on platform development. Responsibilities include coding, mentoring, and ensuring platform reliability for millions of users.

Provide advanced technical support for large MongoDB customers across the full MongoDB ecosystem (server, drivers, Atlas, Cloud Manager). Troubleshoot performance, architecture, recovery, security and storage issues end-to-end, develop support tools, mentor new hires, and liaise with product and engineering teams. Work EST shifts with a weekend shift expectation after ramp and participate in occasional off-hours coverage or regional events.

The Sr. Software Engineer designs, implements, and maintains scalable cloud services, contributes to team processes, and acts as a subject matter expert while leading projects and mentoring others.

As a Software Engineer, you will design, develop, and deliver high-quality software, contribute to code reviews, monitor application performance, and ensure maintainability and consistency across products.

Design, build, and maintain scalable test automation frameworks and tooling (Playwright, C#, JS/TS). Integrate automated tests into CI/CD, develop end-to-end, integration, and performance tests, apply AI techniques for test generation and defect detection, troubleshoot system issues, mentor QA teams, and drive automation and quality engineering best practices.

The Senior Software Engineer will lead projects for the Forms platform, designing and building features across web, mobile, and backend systems while mentoring other engineers and improving platform scalability and reliability.

As a Senior Software Engineer, you'll develop and build tools for creative projects while leading feature development and collaborating with teammates.

Lead backend and full-stack work on the Payments team, building multi-gateway integrations (Stripe, PayPal), payment APIs, and customer payment UIs. Ensure secure, compliant (PCI-DSS) payment flows, reliability, observability, and scalability across AWS/Kubernetes microservices. Partner cross-functionally to design architecture, implement settlement/reconciliation, and maintain high availability.

Technical Services Engineers at MongoDB solve complex database problems for customers, requiring deep technical skills and customer service expertise. They work on architecture, performance, and support tools, engage with clients on technical queries, and contribute to projects within the MongoDB ecosystem. The role demands a mix of systems and storage engineering experience, coding skills, and a collaborative spirit.

Senior Software Engineer responsible for developing and maintaining web applications and microservices (React, Golang). Mentor team members, lead code reviews, influence technical decisions, improve CI/CD and testing strategies (unit, E2E, performance), collaborate across teams on integrations, and promote engineering best practices and documentation.

The Quantitative Developer will assist with client onboarding, support, implement and maintain new functionality for portfolio compliance, and improve team documentation.

The Senior ServiceNow Developer designs and builds solutions on the ServiceNow platform, working with stakeholders to enhance legal practice operations and improve service delivery through automation and integrations.

Design, develop, and field high-performance Ground Control Station and C2 software using C++/Qt/QML and QGroundControl. Lead architecture and technical direction, mentor engineers, define APIs/ICDs, debug integration/latency issues, support field tests, implement post-mission debrief tools, and ensure interoperability with C2 standards.

Lead design, development, testing, and delivery of backend-focused .NET Core systems. Mentor engineers, drive Agile ceremonies, own end-to-end projects, improve performance and reliability, provide 3rd-level support, and collaborate with stakeholders to implement APIs, databases, cloud, and containerized solutions.

Design, implement, and improve significant features in HCSS products. Analyze product architecture and databases for ROI-driven improvements. Lead code reviews, mentor junior developers, collaborate to enhance infrastructure, reliability, and CI/CD practices.

Designs, develops, and deploys AI-driven, cloud-native applications on Azure. Builds RAG knowledge systems, AI agents, secure APIs, and orchestrated workflows using C#, .NET, Azure services, Docker, and CI/CD. Collaborates with stakeholders, ensures observability and security, supports production incidents, and provides documentation and knowledge transfer.

Develop and enhance GIS capabilities within a core C++ OMS application, configure map services, design cartography, integrate spatial databases, resolve spatial data issues, and collaborate with product teams using Jira and GitHub.

Design and maintain healthcare software integrations, ensuring data flow between Epic EHR and systems while mentoring developers and ensuring quality standards.

Lead the design and development of Windows desktop applications, ensuring performance, accessibility, and collaboration with various teams. Oversee the entire feature lifecycle and address complex issues in a user-centric manner.

Lead design, development, and maintenance of scalable, cloud-native web applications. Own end-to-end product features, mentor engineers, troubleshoot production incidents, improve performance, implement APIs, and support on-call rotations.

Senior Quality Engineer responsible for designing and maintaining scalable automated test frameworks, executing functional/regression/performance tests, analyzing results, documenting QA activities for compliance, collaborating with cross-functional teams, and mentoring junior engineers to improve automation quality.

Lead a cross-functional Agile engineering team with hands-on architecture and coding, mentor engineers, partner with Product and QA, and drive modernization, CI/CD, containerization, cloud adoption, and operational reliability to improve delivery and team effectiveness.