Top Remote C# Jobs in Washington, DC

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.

Develop and support software applications, REST and ASP.NET web services, distributed systems, data integrations, and storage solutions. Analyze requirements, optimize performance, resolve application issues, implement security and data protection, and collaborate with product, business, and QA teams. The role includes technical documentation, quality reviews, managing competing priorities, and mentoring less experienced developers.

Lead technical delivery for Life Insurance and Annuity clients: design solutions and architectures, produce technical design docs, mentor distributed teams, drive code quality and integrations (APIs), maintain mainframe and .NET codebases (COBOL, C#, DB2/SQL), and leverage AI tools (GitHub Copilot, Claude Code, custom agents) for automation and efficiency.

Designs and delivers cloud-based software solutions with strategic customers and Microsoft product teams. Leads requirements definition, architecture, dependency identification, design documentation, and development of maintainable code. Mentors engineers, contributes to open-source assets, coordinates project and release plans, and serves as a designated responsible individual for system reliability, monitoring, on-call support, performance, and operational improvements.

Designs and executes manual and automated testing across applications, APIs, databases, data platforms, and integrated systems. Builds QA automation frameworks, validates data quality, manages test environments, supports CI/CD test integration, tracks defects, and performs root cause analysis. Collaborates with Agile engineering teams on sprint planning, releases, and process improvements while testing healthcare technology platforms and regulated workflows.

Develop and maintain cloud-based healthcare revenue-cycle software, build new features, modernize applications, perform code reviews and automated testing, address security vulnerabilities, troubleshoot production issues, and improve system performance. Collaborate with developers, product owners, support teams, and project leadership while applying Agile, CI/CD, TDD, and software development best practices.

Develops, tests, documents, supports, and improves software systems with a primary focus on Sitecore and modern web applications. Designs responsive interfaces, integrations, APIs, automations, and CMS solutions while supporting CI/CD, Agile, testing, monitoring, security, and performance standards. Troubleshoots incidents, manages technical debt, collaborates with project and business teams, documents solutions, and provides stakeholder support. Requires strong web technologies, databases, operating systems, enterprise integration, and software development experience.

Develops and maintains scalable software applications across multiple platforms. Responsibilities include participating in Agile planning, designing solutions, writing code and automated tests, troubleshooting, supporting deployed applications, reducing technical debt, and guiding less experienced engineers. Requires experience with web and backend technologies, SQL Server, software architecture, application lifecycle methodologies, and end-to-end product development. AWS and AI-driven development experience are preferred.

Leads end-to-end development of software that validates and accepts hardware racks into Microsoft datacenters. Designs reliable, observable, and scalable workflows; translates hardware and operational requirements into platform capabilities; diagnoses production issues; improves automation and performance; and collaborates with software, hardware, networking, manufacturing, and datacenter teams. The role includes architectural design, implementation, testing, rollout, monitoring, documentation, and mentoring.

Owns enterprise integration architecture across data and application systems. Defines integration standards, designs and builds complex integrations, creates reusable reference architectures, leads strategic architecture programs, modernizes legacy ESB and point-to-point systems, and governs security, reliability, observability, and data integrity. The role also coaches engineers and advises technical and business stakeholders across global teams.

Own the networking architecture and roadmap for AKS Flex and Unbounded, enabling secure, reliable, high-performance Kubernetes connectivity across sites, clouds, edge environments, and on-premises infrastructure. Design overlay and underlay networks, routing, encrypted tunnels, eBPF dataplanes, and distributed systems for high-latency and partitioned environments. Integrate InfiniBand and RDMA for AI workloads, lead cross-team architecture efforts, improve global fleet performance and reliability, and participate in production operations and on-call rotations.

Owns maintenance and support of Virscidian’s existing software products. Responsibilities include resolving defects and customer issues, developing C#/.NET desktop and server applications, working with SQL Server and REST APIs, supporting Azure resources and DevOps processes, troubleshooting deployments, and delivering incremental features. The role collaborates with support, product, business, and engineering teams while contributing to SaaS, scientific algorithms, performance, and scalability initiatives when appropriate.

Develops, modernizes, tests, documents, and sustains software applications for NAVSUP BSC. Responsibilities include coding with .NET and related technologies, integrating systems, implementing cybersecurity controls, automating CI/CD pipelines, managing artifacts, troubleshooting production issues, conducting quality audits, and supporting secure cloud-native architectures. The role collaborates with engineering, security, operations, and government stakeholders in an Agile environment.

Design, develop, and maintain scalable billing and invoicing systems using C# and PHP. Lead architecture, code reviews, mentoring, CI/CD improvements, monitoring, database optimization, security, and PCI DSS compliance. Use Claude and Cursor in daily development while validating generated code for correctness, security, performance, and maintainability. Collaborate across Product, Engineering, QA, and support teams to deliver reliable payment-processing services and resolve complex technical issues.

Designs, builds, scales, and operates distributed CI/CD services supporting millions of builds, tests, and releases. Develops code for Azure-based infrastructure spanning virtual machines, containers, and custom lab environments. Responsibilities include requirements analysis, architecture and design documentation, estimation, debugging, optimization, operational playbooks, on-call incident response, monitoring, reliability improvements, and mentoring engineers.

Provides technical leadership for architecture and evolution of large-scale distributed data platforms supporting Azure network telemetry. Designs streaming and batch systems, establishes reusable engineering patterns, drives cross-team technical strategy, and owns capabilities from design through production operations. Ensures scalability, reliability, security, performance, data quality, and operational excellence while mentoring engineers and influencing technical leaders. The role also involves architectural reviews, dependency management, risk reduction, and applying AI or machine learning approaches to operational systems.

Develop and improve Azure Kubernetes Service capabilities across Linux and Windows, building reliable container orchestration and cloud infrastructure at global scale. Responsibilities include advancing Kubernetes components, improving service quality, accelerating engineering velocity, automating incident prevention and remediation, and integrating AI tools into development workflows. The role focuses on distributed systems, containers, Kubernetes, DevOps tooling, and AI/ML workload infrastructure.

Build and lead a scalable platform engineering function spanning CI/CD, infrastructure, observability, developer tooling, environments, and production operations. Develop internal tools, reusable automation, paved roads, and AI-assisted workflows that improve developer experience, delivery reliability, and engineering productivity. Partner across teams, guide architecture and standards, measure DORA and DX metrics, and shape the platform roadmap while providing hands-on technical leadership.

Lead delivery of Unity Engine’s C#/.NET integration, including GC, JIT, AOT, runtime libraries, and compiler toolchains. Define technical vision, improve performance and reliability, guide cross-functional development, communicate roadmaps and metrics, support users, and mentor team members. The role requires deep C# and C++ expertise, compiler knowledge, hardware architecture understanding, and proprietary game engine development experience.

Develops, implements, maintains, tests, and troubleshoots software applications supporting company systems. Collaborates with business analysts and lead developers to analyze requirements, design solutions, document functionality, conduct code reviews, support QA and deployments, manage version-controlled code, and resolve production defects. The role participates in software development projects, communicates progress, and provides on-call night support.

Lead architecture, technical direction, implementation, and delivery across Scripture-centered web and mobile products. Translate product concepts into technical plans, review code and vendor work, ensure quality and security, and guide scalable serverless solutions. Mentor engineers, promote development and DevOps best practices, support AI adoption, and collaborate with product managers, ministry leaders, stakeholders, and external partners. The role is a remote individual-contributor position requiring occasional domestic travel and U.S. work eligibility.

Develops coherent optical subsystem and manufacturing test solutions onsite. Responsibilities include configuring test instrumentation, supporting automated manufacturing test infrastructure, and developing .NET applications. Requires experience with optical and electrical test equipment, electronics schematics, VB or C# object-oriented programming, and SQL Server databases. Azure DevOps experience, analytical skills, and strong communication are preferred.

Leads platform engineering across learner and enterprise products, setting architecture direction, integrating AI and data capabilities, managing engineering managers and teams, and improving quality, reliability, security, accessibility, and delivery. Partners with product, design, IT, cloud operations, sales, and executives on strategy, planning, budgets, and enterprise SaaS outcomes.

Lead the architecture and technical direction of Alpaca’s Trading API customer experience. Own identity, authentication, authorization, account models, partner access, and customer-facing trading applications. Drive backend modernization, real-time trading features, security practices, safe production delivery, observability, incident prevention, design reviews, and engineering mentorship. Collaborate with Product, Design, Compliance, Security, Brokerage Operations, and platform teams while remaining a hands-on principal contributor.

Design, test, document, and deploy geospatial software solutions for defense and intelligence imagery. Integrate analytical toolkits with ArcGIS, define user requirements, lead lab testing and automated QA efforts, and collaborate on software releases. The role applies remote sensing, photogrammetry, image processing, and AI while mentoring colleagues and managing project dependencies.