Top C# Jobs in Washington, DC

Leads software engineering for tax technology solutions, overseeing architecture, coding, testing, deployment, project delivery, and AI-enabled innovation. Advises stakeholders, translates tax needs into scalable applications and microservices, evaluates technical tradeoffs, manages risks, and coaches engineering teams. Requires client collaboration, clear communication, systems thinking, and the ability to guide teams through complex and ambiguous situations.

Leads tax technology software engineering workstreams from planning through deployment. Manages client-facing engagements, translates tax requirements into scalable technical solutions, reviews architecture and code, oversees CI/CD, and coaches engineers. The role also manages scope, budgets, timelines, performance, troubleshooting, and delivery quality while identifying automation and process improvement opportunities through AI fluency and analytical thinking.

Leads architecture, full-stack development, scalable application design, dashboards, backend integrations, AI-enabled features, cloud infrastructure, DevOps, monitoring, and production support. Mentors engineering teams, establishes technical standards, guides strategy, and develops solutions for payer operations, metadata, contracts, and performance measurement.

Develop and maintain ASP.NET and .NET Core web applications and services. Translate business requirements into maintainable software, troubleshoot defects, test changes, support deployments, document technical work, and coordinate with business analysts, database staff, infrastructure teams, and customer stakeholders. The role is full-time onsite in Washington, D.C., may require occasional overtime or evening and weekend work, and is contingent on contract award.

Build and operate end-to-end cloud solutions on Azure, including React and .NET applications, REST APIs, complex SQL reporting, and event-driven workloads. Manage Docker and Kubernetes deployments, CI/CD pipelines, infrastructure as code, API gateways, identity integrations, secrets, telemetry, and accessibility. Develop SharePoint and Microsoft Graph solutions, optimize application and database performance, participate in Agile development and code reviews, and support production releases and incidents.

Develop and maintain full-stack web applications using .NET and React. Responsibilities include designing, coding, testing, deploying, and troubleshooting front-end and back-end components; implementing scalable APIs and application architecture; conducting unit, integration, and system testing; participating in code reviews; collaborating with cross-functional teams; and contributing to software development lifecycle improvements. The role requires active Top Secret clearance and at least eight years of experience.

Designs and operates secure, scalable cloud infrastructure for AI/ML workloads across hybrid, multi-cloud, air-gapped, and classified environments. Responsibilities include infrastructure automation, Kubernetes and container orchestration, cloud networking and storage optimization, hybrid on-premises integration, DevSecOps pipelines, governance, monitoring, database and serverless services, and high-availability operations. The role requires active Top Secret clearance and supports complex multi-enclave ecosystems.

Develop and maintain enterprise websites and information systems from conception through deployment. Integrate features with data scientists and data engineers, work within existing systems and policies, and evaluate emerging technologies. Responsibilities include full-stack web development, data engineering, software integration, deployment, greenfield development, legacy system upgrades, and Agile/Scrum collaboration.

Leads enterprise systems architecture, infrastructure modernization, automation, and zero-trust security across complex hybrid-cloud and cross-enclave environments. The role directs Infrastructure as Code, configuration management, disaster recovery, compliance automation, monitoring, and infrastructure governance. It provides strategic technical leadership for secure, highly available, scalable systems and guides teams on administration and infrastructure best practices. The position requires extensive Windows, Linux, cloud, automation, security, and enterprise infrastructure experience in cleared government contracting environments.

Develop and maintain enterprise websites and information systems from conception through deployment. Integrate features with data scientists and data engineers, work within existing infrastructure and policies, and evaluate emerging technologies. Responsibilities include data engineering, web development, software integration, deployment, legacy-system upgrades, greenfield development, and Agile/Scrum collaboration.

Develop and maintain full-stack web applications using .NET, React, and related technologies. Responsibilities include designing front-end and back-end components, participating in the software development lifecycle, writing and testing code, conducting code reviews, troubleshooting issues, collaborating with cross-functional teams, and using GitLab for source control. The role requires an active Top Secret clearance, a bachelor’s degree, and at least five years of experience.

Build and maintain full-stack web applications using .NET and React. Responsibilities include developing ASP.NET and C# backend services, React frontends, REST/RPC APIs, database integrations, testing, troubleshooting, code reviews, source control, and cross-functional collaboration throughout the software development lifecycle.

Modernize enterprise SharePoint and Microsoft 365 solutions by converting legacy workflows and forms into Power Automate and Power Apps. Build automation with PowerShell, JavaScript, SPFx, React, and C#, develop Power BI dashboards, refactor custom applications, and support SharePoint Server-to-Online migrations. The role collaborates with government customers onsite in Washington, D.C., translating requirements into secure, scalable cloud solutions.

Design and implement advanced modeling and simulation tools to evaluate system performance and support strategic decision-making for national defense. Perform quantitative analysis, develop physics-based and agent-based models, optimize AI and machine-learning algorithms, and collaborate with government clients. The role involves EO-IR and 3D simulation, computational modeling, and potentially high-performance computing, computer vision, and autonomous-system behavior development.

Lead the design, development, and delivery of scalable backend and patient-facing software for MinuteClinic. Set technical direction, mentor engineers, drive architecture and engineering excellence, and collaborate with product, design, and architecture teams. Build cloud-based services, APIs, distributed systems, CI/CD pipelines, automated testing, and observability solutions while adopting AI-assisted development practices. Healthcare technology, interoperability standards, microservices, and front-end experience are preferred.

Performs functional, integration, regression, release, accessibility, and database validation testing. Writes test cases, prepares test data, reports and retests defects, triages automated test failures, and progressively develops automated tests with senior guidance. Participates in Agile ceremonies and uses SQL, automation frameworks, and approved AI tools. The role is expected to grow toward independent automation ownership and test data preparation.

Build and deliver custom software integrations and policy enforcement points for cleared customers in classified and disconnected environments. Collaborate with customer, deployment, QA, platform, and product engineers; explain designs to security teams; package software for air-gapped installation; and convert repeated customer solutions into reusable tools, libraries, or templates. The role also involves AI-assisted development, documentation, design reviews, and peer mentoring.

Designs, develops, tests, deploys, monitors, and maintains RPA solutions across their full lifecycle. Translates business requirements into scalable workflows, integrates automations with enterprise systems, ensures data integrity, troubleshoots failures, and maintains technical documentation. Collaborates with technical and non-technical stakeholders while using Agile, DevSecOps, or structured software development practices. The role supports federal financial management operations remotely and requires a Secret clearance or higher.

Develop, test, deploy, and support .NET applications, Azure services, and Dataverse model-driven Power Apps. Build containerized microservices, plugins, Power Automate flows, Power BI reports, and dashboards. Analyze existing applications, recommend improvements, write automated tests, participate in Agile planning and client sessions, and maintain development, testing, and production environments.

Develop and support Microsoft Power Platform solutions and migrations for the FBI. Responsibilities include gathering requirements, designing user interfaces, conducting usability testing, building Power Apps, automating workflows with Power Automate, modeling data in Dataverse, integrating Microsoft and third-party services, and creating Power BI dashboards and reports.

Designs, develops, and maintains enterprise Power Platform solutions using Power Apps, Power Automate, Dataverse, and Power BI. Leads architecture, integrations, governance, ALM, security, DevOps deployments, and solution lifecycle management. Develops PCF controls, JavaScript/TypeScript components, and C# plugins; integrates Azure services and external systems. Conducts technical workshops, code reviews, documentation, and mentoring while collaborating with stakeholders, architects, product owners, and business analysts.

Design, develop, test, secure, and maintain enterprise applications and APIs using C# and modern .NET. Build database solutions, RESTful integrations, automated tests, and CI/CD pipelines while supporting Agile and DevSecOps delivery. Modernize legacy applications, troubleshoot production issues, conduct code and design reviews, and remediate security findings. The role requires an active DoD Secret clearance and U.S. citizenship and is remote within the United States during Pacific Standard Time hours.

Develop and maintain native Android applications and ATAK plugins, integrating TAK Server APIs, Cursor-on-Target messaging, mapping overlays, and situational-awareness features. Write, test, debug, and deliver production code while collaborating with customers and end users to translate requirements into software features. The role requires Java or Kotlin, Git, and exposure to the TAK ecosystem, with opportunities to use cloud, database, geospatial, testing, and Linux technologies.

Modernize legacy Java and .NET applications by analyzing dependencies, preserving APIs and business behavior, building compatibility adapters, refactoring services, and supporting migration, testing, deployment, cutover, and retirement. The role also requires secure DevSecOps practices, documentation, production troubleshooting, stakeholder communication, and protection of classified and Controlled Unclassified Information in government environments.

Lead the development of web applications, guiding feature development from design to production, while mentoring a small Agile team and driving modernization initiatives.