Top Remote C# Jobs in Washington, DC

Develop cross-platform C++ and Qt software for network device discovery, monitoring, and data collection across Windows and Linux. Build high-performance, concurrent, asynchronous systems that communicate with thousands of devices using SNMP, SSH, ICMP, WMI, and related protocols. Own testing, troubleshoot issues across application, operating-system, and network layers, optimize reliability and performance, and collaborate with backend, UI, QA, and product teams.

Provides technical leadership for Azure SQL databases supporting a highly available Azure service. Responsibilities include database performance tuning, reliability and capacity planning, schema changes, data migrations, observability, incident response, root cause analysis, operational automation, and technical strategy. The role partners with software engineers, SREs, and architects to improve scalability, durability, cost efficiency, and long-term service reliability across teams.

Designs and develops FPGA SmartNIC networking acceleration for Microsoft Azure. Responsibilities include hardware architecture evaluation, RTL coding in Verilog/SystemVerilog, simulation, hardware testing, debugging, verification, scripting, software development, Agile collaboration, and production DevOps support. The role partners across hardware and software teams to deliver cloud networking infrastructure, including SDN capabilities, packet manipulation, and performance improvements.

Design and implement PostgreSQL internals and indexing/query features for large-scale document workloads, extend query engine with BSON-aware operators and custom scan nodes, tune index pruning and storage, profile distributed systems for performance, collaborate with open-source DocumentDB/PostgreSQL communities, and participate in design/code reviews.

Design, develop, test, and deliver enterprise applications, APIs, services, integrations, and web applications. Own projects from architecture and technical design through production release and handoff. Troubleshoot complex issues across applications, databases, integrations, and cloud environments; contribute to architecture, code reviews, testing, CI/CD, documentation, and production support. Partner with Product, QA, Architecture, and engineering teams to deliver scalable, secure, maintainable solutions.

Leads photonic integrated circuit test software architecture, infrastructure improvements, test-station automation, and hardware-control software development. Oversees software migration across LabVIEW, Python, MATLAB, C#, and C++, while leading a small software team and mentoring engineers. The role supports electrical and optical testing of InP-based transceiver PICs at wafer, die, and subassembly levels, including vision systems, probe positioning, calibration, and test software revision control.

Leads AI-enabled quality engineering and test automation across the SDLC. Builds automated UI, API, database, and batch testing frameworks; integrates intelligent testing into CI/CD pipelines; applies AI for test generation, defect prediction, root-cause analysis, regression optimization, anomaly detection, and quality monitoring. Partners with cross-functional teams, develops quality gates and dashboards, evaluates emerging AI tools, and mentors QA staff. Requires 5+ years of QA or test automation experience, programming proficiency, and hands-on AI/ML implementation.

Design, develop, secure, and maintain mission-critical Microsoft-platform software for DoD programs. Build C# and .NET applications, responsive JavaScript and EXT JS interfaces, REST APIs, and optimized SQL Server databases. Apply secure coding, STIG, RMF, threat modeling, vulnerability remediation, documentation, and compliance practices. Integrate Kiro AI capabilities, collaborate with cybersecurity and engineering teams, and support deployment and sustainment in classified or controlled environments.

Own end-to-end delivery of complex software features for a virtual care platform. Design scalable systems, build AI-powered agents and workflows, enhance reliable mobile and web experiences, and translate clinical and user needs into technical solutions. Collaborate with product managers, designers, and clinical staff while focusing on patient impact, product quality, and engineering efficiency.

Leads end-to-end software development for AI-infused enterprise applications, including architecture, database design, coding, testing, deployment, and service reliability. Builds Copilot and agentic solutions using Azure and modern full-stack technologies. Provides technical leadership, mentors engineers, establishes quality and security practices, supports enterprise integrations, and collaborates with product teams, program managers, UX designers, and data scientists to deliver scalable commercial software.

Lead architecture and development for AKS Flex, scaling etcd and Kubernetes control planes for distributed node fleets. Design remote-node provisioning, lifecycle automation, Kubernetes-native APIs, secure bootstrap, upgrades, and reliability systems across Azure, on-premises, edge, and other clouds. Drive performance testing, production operations, open-source collaboration, technical strategy, cross-team alignment, and mentorship while solving distributed-systems, storage, security, and scalability challenges.

Develop and maintain full-stack features for a healthcare analytics platform using Angular, C#, REST APIs, SQL, Snowflake, AWS, and Power BI. Build reports, dashboards, and data pipelines handling claims and other sensitive healthcare data. Participate in testing, code reviews, product planning, on-call support, and compliance with HIPAA and privacy requirements.

Designs and develops scalable, resilient distributed systems and microservices for a cloud-based healthcare platform. The role spans .NET, SQL, Angular, cloud infrastructure, Kubernetes, observability, security, performance optimization, and full-stack development. It provides hands-on technical leadership, architectural guidance, mentoring, incident support, and automation while ensuring compliant handling of PHI and PII data.

Develop and maintain backend software using C# and T-SQL, focusing on import functionality, performance optimization, utility and migration tooling. Responsibilities include test-first development, design and code reviews, debugging, integration and deployment, documentation, collaboration with product management, and on-call support. The role requires strong software engineering practices, scalability and security awareness, regulatory compliance, and independent execution of complex tasks.

Staff Software Engineer responsible for setting technical direction, architecting scalable distributed systems, shipping high-impact features, and building AI-powered tools for a virtual healthcare platform. The role includes mentoring engineers, partnering with product and clinical leadership, translating user needs into technical solutions, and guiding frontend and backend application development in a fast-paced startup environment.

Develop, test, deploy, and support solutions for the ScriptMed Cloud Platform using C#, SQL, and scripting. Configure systems for customer onboarding and tenant creation, automate manual workflows, translate business requirements for distributed engineering teams, and collaborate on designs and troubleshooting. The role requires responsible handling of sensitive data, adherence to HIPAA and security policies, project ownership, documentation, and participation in an after-hours on-call rotation.

Leads full-stack software engineering and technical delivery for enterprise applications across the Microsoft .NET and Azure ecosystem. Designs scalable architectures, APIs, integrations, distributed and event-driven systems, and cloud-native solutions. Provides hands-on development, code reviews, troubleshooting, DevOps collaboration, CI/CD, production support, and operational improvement. Mentors engineers, coordinates technical delivery, manages risks and dependencies, and partners with Product, Architecture, Security, QA, and infrastructure teams.

Lead and mentor the software engineering team responsible for PSA Set Registry, a large-scale consumer web and mobile product. Drive architecture, development, delivery, code quality, release management, production troubleshooting, and technical strategy. Partner with product, design, and business teams to translate requirements into scalable solutions while promoting agile practices, collaboration, continuous learning, and an inclusive engineering culture.

Designs, develops, tests, troubleshoots, documents, and maintains software applications throughout the project lifecycle. Responsibilities include coding, database and system administration, performance testing, debugging, software upgrades, requirements documentation, user support, vendor coordination, and collaboration with analysts, administrators, and engineers. The role also provides guidance to junior development staff and supports cross-departmental projects.

Leads software development, QA, and DevOps for a digital insurance platform. Owns engineering roadmaps, delivery governance, architecture, code quality, security, testing, release reliability, and operational improvement. Manages and develops a small engineering team, partners with product and business stakeholders, evaluates technical risks, and guides responsible AI-assisted development. The role requires hands-on technical judgment across modern application architecture, Azure cloud services, CI/CD, automated testing, monitoring, and secure software delivery.

Own web compatibility triage and incident response across DuckDuckGo browsers on Mac, Windows, iOS, and Android. Debug complex web applications and third-party code, distinguish site, browser, and privacy-related issues, reverse-engineer obfuscated code, build durable cross-platform fixes, and develop automation and LLM agent tooling to reproduce and triage breakage. Lead ambiguous projects independently and communicate with technical and non-technical stakeholders.

Staff Software Engineer leading hands-on full-stack development across C#/.NET services, Angular interfaces, databases, and AWS-hosted applications. Builds healthcare data integrations using HL7, FHIR, and X12 EDI; modernizes legacy systems; improves performance; applies secure coding and HIPAA practices; supports production incidents; reviews code; mentors engineers; and collaborates with product and QA teams.

The Principal QA Architect owns the strategy, architecture, delivery, and adoption of enterprise QA technology solutions. Responsibilities include designing automation frameworks, AI-enabled testing capabilities, reporting, observability, test data solutions, CI/CD quality gates, and integrated platforms. The role remains hands-on with software development, prototyping, integrations, and troubleshooting while providing technical leadership, mentoring, roadmap ownership, stakeholder influence, and outcome measurement across QA and software delivery teams.

Develops and maintains secure, accessible, responsive WordPress websites and web applications for Military OneSource. Responsibilities include PHP and JavaScript development, CMS customization, REST API integrations, UX/UI implementation, Section 508 and WCAG compliance, accessibility testing, production troubleshooting, performance optimization, Agile delivery, Git workflows, and collaboration with cybersecurity and DevSecOps teams in a Federal environment.

Lead architecture and hands-on development of scalable backend systems and APIs supporting real-time applications at massive scale. Own the full engineering lifecycle, establish standards for reliability and testing, troubleshoot production issues, influence technical roadmaps, collaborate cross-functionally, and mentor engineers. The role requires deep backend development, distributed cloud systems, system design, automated testing, and technical leadership experience.