Top C++ Jobs in Washington, DC

Design, build, and maintain GenAI-enabled developer tooling and integrations (GitLab, Jira, Confluence) to accelerate C++, Python, and Node.js engineering workflows. Create secure LLM harnesses, containerized local environments, automation, and reproducible builds (Nix). Partner with robotics/autonomy teams to remove friction, improve build/test/dev environments, and support adoption with documentation and troubleshooting.

Develop and integrate software command-and-control solutions for satellite vehicles. Integrate satellites and flight software into a mission management platform, decompose customer mission requirements, troubleshoot hardware-software interfaces, and support scalable product solutions. The role requires expertise in embedded software, satellite protocols, command and telemetry standards, encryption, cloud services, and version control, along with strong customer communication and independent problem-solving skills.

Design, build, and maintain systems-level Rust software for an AI-powered autonomous drone platform. Integrate AI/ML pipelines, develop networking and protocol components, support autonomy features, and create reliable software for resource-constrained, low-latency environments. Develop and test through simulation while collaborating with ML engineers and contributing across application and systems layers.

As a Datacenter System Software Architect at SiFive, you'll design RISC-V Linux systems for datacenters, engage with customers, and optimize performance across software and hardware.

Develop, integrate, and test path-planning and autonomy software for aerial platforms (Group 1-5). Implement sampling- and grid-based planners, outer-loop control, and integrate GNC algorithms onto OEM hardware. Collaborate with cross-functional teams and DoD partners; support testing on real systems and simulations.

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.

Develop and maintain Ruby and Rails applications, write Bash scripts, troubleshoot performance and multithreading issues, optimize SQL/MySQL queries, administer Unix/Linux/Solaris servers, and collaborate in Agile teams. Participate in API and SOA development and use source control (SVN/Git).

The Sailpoint Consultant will maintain and support SailPoint IIQ infrastructure, troubleshoot issues, develop scripts, and assist project teams with identity and access solutions.

As a Missions Software Engineer, you'll collaborate with defense customers to integrate and operationalize vehicle intelligence products, tackling software engineering, hardware integration, and project execution challenges.

As a Lead Software Engineer, you will integrate Applied Intuition's vehicle intelligence products with defense and government customers, overseeing technical execution for complex systems.

As a Forward Deployed Software Engineer, you'll integrate vehicle intelligence products with government systems, collaborate on deployment, tackle technical challenges, and ensure successful project execution in military environments.

Six-month on-site software engineering co-op building production features for the Nuclear Operating System (NOS). Work spans product, platform, and data squads, including AI-powered features (LLMs, RAG, agents), data integrations (Palantir Foundry, AWS GovCloud), automated testing, and field deployment tooling. Ship production code alongside engineers and nuclear experts.

12-week Summer 2027 software engineering internship building production features in the Nuclear Operating System (NOS). Work includes AI-powered features (LLM/agent-backed), retrieval and tool-calling, data integrations with Palantir Foundry and AWS GovCloud, converting prototypes to production, field deployment tooling, and automated testing/compliance to keep NOS audit-ready. On-site in Washington, DC; interns ship real features alongside full-time engineers and nuclear experts.

Develop and optimize GPU-accelerated algorithms for quantum circuit simulations, collaborating with various teams, and leading technical efforts.

Design, implement, and optimize scalable high-performance dense linear algebra kernels for GPUs. Provide technical leadership, collaborate with product and partners, improve performance and quality, and contribute to library roadmaps and development practices.

The researcher/engineer will design and maintain experimental equipment, conduct research in acoustics, and support field tests. Strong hands-on, software, math, and physics skills are necessary. This role may lead to project engineering tasks. The candidate must possess a BS degree or higher, have laboratory experience, and programming skills, while being flexible to handle multiple tasks.

Develop, enhance, and maintain backend web applications and services using C#/.NET. Implement features with ASP.NET, Entity Framework, and SQL Server; write unit and integration tests; perform troubleshooting, code reviews, vulnerability remediation, and O&M tasks while collaborating with senior engineers and cross-functional teams.

Develop, test, debug, and enhance software solutions for a federal customer. Integrate design requirements, resolve compatibility issues, research emerging technologies, produce technical documentation, troubleshoot applications, and prepare analytical progress reports.