Top Remote C# Jobs in Washington, DC

Own platform feature and API development, integrations, and deployments. Design, build, and maintain backend-focused full-stack features, collaborate with product and design, perform code reviews, troubleshoot, and work with cloud infrastructure and CI/CD pipelines to scale the marketplace.

Lead fullstack technical work connecting Python/Django backend services with Unity (C#) client, drive technical roadmap, own live-ops reliability and incident management, mentor cross-functional teams, deliver scalable features, and reduce technical debt for a live-service mobile/PC game.

Lead design and implement scalable backend systems using Node.js, build RESTful APIs, design SQL schemas, optimize performance, mentor engineers, deploy on Azure, and maintain CI/CD, security, and observability.

Lead quality engineering within an Agile squad, design and maintain automated test suites across UI, API, microservices and DB, integrate tests into CI/CD, mentor SDETs, triage production issues, define test strategy, tooling and test environments, and enforce quality best practices.

Design, build, and maintain scalable backend services in C#/.NET powering payment routing, connector management, and platform configuration. Build secure, observable APIs and high-volume transaction processing systems, collaborate across Product/AI/Engineering, mentor junior engineers, drive architecture and standards, and own full lifecycle from requirements to deployment.

Lead design and implementation of enterprise solutions using Microsoft technologies. Architect scalable, secure microservices and cloud-native systems on Azure, guide development teams, implement DevOps/CI-CD and automated testing, integrate with existing systems, and promote best practices in performance and security while collaborating with stakeholders.

Lead design and implementation of enterprise software using Microsoft technologies. Architect scalable, secure cloud-native microservices on Azure, guide development teams, drive DevOps/CI-CD and automated testing, ensure integration with existing systems, and promote best practices in performance and security.

Lead end-user facing engineering squads (about half the team), grow engineering capacity, and provide hands-on technical leadership. Drive distributed computing, cloud (AWS/Azure), CI/CD, Agile/Scrumban, mentoring, conflict resolution, and product delivery for a remote-first, time-zone-compatible global team. Travel periodically for face-to-face team interactions.

Design, build, and support Dynamics 365 CRM and Power Platform solutions including Dataverse, Power Pages, Power Automate, integrations with Business Central and external systems. Develop custom extensibility (C#/.NET plugins, JavaScript, PCF), implement portal UX/security, enable ALM and deployment practices, troubleshoot production issues, and collaborate with stakeholders to deliver maintainable, scalable customer-facing applications.

Build and ship full‑stack features for transportation management and other client products. Design and implement APIs and UIs, collaborate with product and design, own delivery, write modular testable code, troubleshoot and iterate quickly, and mentor peers.

Develop and maintain .NET Core trading systems for Linux with service-oriented architecture and multi-threaded processing. Implement async, lock-free structures and distributed systems, write unit and integration tests, optimize SQL queries, design data structures and algorithms, and work with communication protocols (SignalR, gRPC, HTTP). Use PostgreSQL, Docker, and AWS in the deployment stack.

Lead modernization of CI/CD by evolving Azure DevOps pipelines and implementing GitHub Enterprise/Actions. Integrate SAST/DAST, observability, and test automation into pipelines. Design and maintain AWS infrastructure using Terraform and AWS CDK, build reusable IaC patterns, enforce DevSecOps practices, and support AI workload infrastructure and AI-assisted tooling to improve platform reliability and developer productivity.

Design, build, and own end-to-end features for AI-powered finance agents and agent orchestration. Implement integrations with accounting and payment platforms, create dashboards and reporting, ensure security and data integrity, make architectural choices, monitor production, and drive AI-assisted, agentic development workflows.

Support customer and partner relationships by demonstrating radar value, lead integrations with C2/VMS/autonomous platforms, plan and execute installations, tune systems, provide technical support, analyze post-demo data, create training materials, collect feedback, and travel up to 50%.

Design, develop, test, and deploy .NET solutions (APIs and web apps). Build and consume RESTful services, work with SQL and NoSQL databases, use cloud (Azure/AWS) and Docker, apply unit/integration/performance testing, participate in code reviews, define features via spikes, and architect scalable, high-performance systems. Support occasional after-hours and on-call rotation.

Design, develop, and execute automated and manual tests for enterprise web applications. Build and maintain automation scripts, dashboards, and test cases; perform backend/database validation, API testing, defect tracking, and release verification across multiple projects. Support test strategy, execution, and post-production validation.

The Lead Platform Developer oversees architecture, scalability, and reliability, mentoring engineers and building platform capabilities while ensuring security and compliance in a fast-paced environment.

Lead technical direction for compliance platforms, design scalable .NET/Azure distributed systems using DDD/CQRS and event-driven patterns, improve observability and reliability (Dynatrace), drive platform modernization, mentor engineers, define testing and SLO strategies, and partner with cross-functional teams to deliver secure, cost-aware fintech compliance solutions.

Design, build, and deploy NICE CXOne contact center solutions and IVR call flows. Integrate backend services and APIs, implement skills-based routing, troubleshoot end-to-end call center applications, coordinate releases across agencies, and act as SME for CXOne deployments and support.

Designs, develops, tests, documents, and maintains software solutions using Pathward's tech stack. Reviews and improves existing systems, remediates security issues, participates in planning and user-story analysis, and mentors other engineers while following development processes and best practices.

Designs, develops, tests, documents, and maintains software solutions. Reviews and improves existing systems, remediates security issues, participates in planning and user story analysis, mentors engineers, and follows development best practices.

Design and implement scalable full-stack solutions using .NET and React. Lead architecture, cloud migration (AWS/Azure), microservices, and API development. Mentor developers, perform code reviews, resolve production issues, manage client interactions, and drive delivery with a focus on performance, security, and multi-tenant SQL Server architectures.

Design and implement AI-powered educational software, focusing on generative AI systems, mentor peers, and ensure scalable, secure architecture.

Lead design, development, and maintenance of enterprise-grade React + TypeScript applications. Own front-end performance, responsiveness, and security; integrate with .NET/Azure backends; mentor junior developers; perform code reviews and debugging; modernize legacy apps; collaborate with designers, offshore teams, and stakeholders in Agile ceremonies.

Develop and maintain language frontends for the Joern platform for automated software vulnerability analysis, collaborating with a global team.