Top Remote C# Jobs in Washington, DC

Lead the design, delivery, and production adoption of integrations-platform features, including SDKs, agents, job pipelines, developer tooling, and related services. Drive AI-enabled integration authoring, reliability, scalability, observability, and cross-platform support. Partner across product, platform, and customer teams to translate needs into technical solutions while providing architectural leadership, mentorship, and hands-on guidance across distributed systems and workflow orchestration.

Develop and maintain backend applications using .NET, C#, Redis, OpenSearch, AWS, and cloud-native technologies. Responsibilities include troubleshooting software issues, optimizing performance and reliability, conducting code reviews, supporting applications, and leading software and process improvements. The role also involves mentoring colleagues, collaborating independently or with teams, and ensuring high-quality software delivery.

The SharePoint Developer will design systems, develop custom PowerApps, collaborate with government staff, and improve existing applications while ensuring security and quality in software development.

Build and maintain secure cloud-native platforms supporting Navy application teams. Integrate, package, deploy, and operate applications across Kubernetes and UDS environments; develop infrastructure as code, CI/CD pipelines, Helm configurations, and automation. Troubleshoot application and platform issues, implement security controls and vulnerability remediation, support observability, collaborate across technical teams, and contribute to platform strategy. The role also involves mentoring engineers and supporting Kubernetes distributions including EKS and RKE2.

Build and evolve scalable backend systems and APIs for a large SaaS platform. Partner with Product, Design, and QA from ideation through deployment, contribute to microservices architecture, improve testing and observability, identify operational risks, and mentor teammates. The role emphasizes reliable, maintainable solutions, strong collaboration, architectural decision-making, and continuous improvement.

Develop and maintain automated test frameworks and scripts, execute manual and automated test cases, identify and track defects, perform regression testing, collaborate with developers and cross-functional teams, and support CI/CD and testing processes across platforms (including mobile, API, and database).

The Principal Engineer will shape the technical strategy for messaging infrastructure, influence architectural decisions across teams, and solve complex technical problems. Responsibilities include mentoring engineers, driving coherence across teams, and leading initiatives to ensure Weave's competitiveness in messaging solutions.

The Principal Software Engineer will embed with product teams to solve complex technical problems, deliver production code, and make application and service-level architectural decisions. The role owns shared services, reliability, performance, incident response, and cross-system issue diagnosis. It also leads solution design, mentors engineers through influence, supports multiple products and domains, and establishes effective standards for AI-assisted software development.

Lead modernization of a 30-year-old Store Management System by reverse engineering EZC file-based platforms, migrating data and applications to PostgreSQL, and developing enterprise C/C++ software. Responsibilities include architecture, systems integration, APIs, ETL, performance optimization, troubleshooting, documentation, and maintaining business continuity. The role also applies AI-assisted development tools for code analysis, documentation, testing, and modernization while mentoring teams and supporting legacy and modern environments.

Lead design, development, enhancement, and maintenance of enterprise geospatial applications and APIs. Implement ArcGIS Enterprise solutions, web GIS apps, dashboards, integrations, and ensure compliance with federal IT, cybersecurity, and privacy requirements while guiding development teams and supporting testing, deployment, and O&M.

Build and validate reinforcement-learning tasks for AI agents exploring unfamiliar C repositories. Responsibilities include investigating runtime behavior, rewriting engineering questions, refining rubrics and foils, running validation workflows, documenting solutions, and addressing expert review. Work focuses on production systems such as PostgreSQL, Redis, OpenSSH, OpenSSL, and other foundational C codebases.

As a Gameplay Engineer, you'll design and refine networked gameplay systems, iterate on features, and collaborate with designers and back-end engineers.

Develop and integrate game features using Unity, C#, and various APIs while ensuring game performance and quality standards are met.

The C# / .NET Developer will design and maintain middleware applications, build Shopify integrations, and support a mobile app backend in a remote work environment.

Develop and maintain InfoTrack's cloud-based web solution: build backend C#/.NET services, integrate third-party SOAP/REST APIs, design databases, implement full-stack features (React/JS), follow microservices patterns, write tests, collaborate in Agile teams, and recommend product and usability improvements.

Design, develop, and maintain scalable web applications using .NET backend and Angular/React frontend. Collaborate on requirements, implement RESTful APIs, optimize performance, debug, maintain documentation, support end-users, and work within CI/CD and DevOps workflows.

As an AWS Technical Architect, you will ensure customer success with Amazon Connect solutions, conduct technology assessments, educate clients on AWS, and manage technical teams. You'll translate customer needs into effective designs, oversee project deliverables, and provide training while driving best practices in contact center design.

Design, develop, customize and integrate Microsoft Dynamics 365 CRM/CE solutions. Build entities, forms, workflows, plugins, reports and dashboards using CRM SDK, C#, JavaScript, ASP.NET and SQL. Troubleshoot issues, estimate implementation approaches, collaborate with stakeholders, document solutions, and mentor junior developers. Banking domain experience preferred.

The role involves designing CLI and backend services, maintaining code quality, collaborating on technical issues, and writing documentation.

Lead technical design and implementation of secure, scalable enterprise applications. Coach and mentor engineers, enforce code quality, drive architecture, authentication/authorization, CI/CD, DevOps, observability, and SDLC governance to meet banking risk and regulatory standards.

The role involves back-end development using .NET Core and SQL, contributing to Jibble 2.0 API integrations, and collaborating with product and design teams.

Design, build, and maintain payment integrations and a reconciliation data platform for high-volume restaurant transactions. Implement terminal-to-cloud flows, ingestion pipelines, matching engines, reporting UIs, and payment analytics. Provide technical leadership, documentation, and mentor teammates to ensure reliable settlement and reconciliation.

Lead multi-year technical vision and architecture for Payments, Scheduling, Forms, RCM and mobile platforms. Drive cross-team solutions, evaluate build-vs-buy, mentor senior engineers, set company-wide engineering standards, and ensure scalability, reliability, and observability for high-throughput distributed systems.

Build and maintain integrations connecting CoLab to CAD, PLM, and enterprise systems. Design and implement desktop and web capabilities, troubleshoot PLM/CAD workflows, collaborate with Product and Customer Success, and mentor engineers to deliver scalable, reliable engineering lifecycle software.

Designs, develops, tests, deploys, maintains, and supports enterprise software applications using C#, .NET, ASP.NET Core, SQL Server, APIs, and related technologies. Owns application performance, reliability, scalability, troubleshooting, and continuous improvement. Serves as a technical subject matter expert, contributes to architecture and technology decisions, partners with DevOps on CI/CD automation, and mentors engineers. Collaborates with business stakeholders, product owners, vendors, and project teams throughout the software development lifecycle.