Top C++ Jobs in Washington, DC

Design, develop, enhance, and maintain enterprise geospatial applications, web-based GIS interfaces, dashboards, workflows, and APIs; support ArcGIS Enterprise/Server, integrations, testing, deployment, performance tuning, documentation, cybersecurity, and user support within a federal environment.

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.

Lead the design and development of Windows desktop applications, focusing on architecture, accessibility, and best practices, ensuring quality and performance across releases.

The role focuses on developing and maintaining continuous integration systems for NVIDIA's AI software ecosystem, ensuring optimal performance and quality of software stacks.

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.

Design and build a novel, highly scalable data infrastructure to aggregate and stage simulation outputs and user inputs for LLM consumption. Architect massive batch pipelines, complex relational data models, and low-latency distributed processing. Lead technical direction, solve ambiguous first-principles problems, and optimize data for downstream AI decision systems supporting government customers.

Design and implement runtime protocols, formats, and systems to capture, serialize, stream, and replay interactive 3D content across engines. Own C++ runtime and C# APIs across editor, build, simulation, streaming, and playback. Optimize for low-latency, determinism, memory and bandwidth constraints, and build AI interfaces for inspecting and invoking engine state.

Perform advanced finite element analyses and research to assess structural vulnerability to extreme loads. Design mitigation solutions, investigate failure causes, and develop custom pre/post-processing tools. Collaborate with multidisciplinary teams on defense, infrastructure, and energy projects while expanding software development and mechanics expertise.

Design and implement scalable, noise-aware quantum circuit simulators (state-vector, tensor-network, stabilizer) and error‑correction pipelines. Integrate hardware-specific noise models, mid-circuit measurement and decoders, and optimize simulation pipelines for HPC, GPUs, or distributed systems. Collaborate with hardware and algorithm teams, prototype new simulation methods, and support performance estimation and business development.

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.

Design and implement high-performance 4D world and scene representation systems for multi-agent simulation. Build spatial data structures, mapping and geometry pipelines, and low-latency C++ systems. Drive architecture, API design, cross-team integration, profiling and optimization, and mentor engineers to meet autonomy stack requirements across air, ground, and maritime domains.

Lead a forward-deployed engineering team to integrate and deploy Applied Intuition vehicle intelligence products for defense customers. Own end-to-end technical execution across software engineering, OS configuration, system deployment, and hardware integration while collaborating with product and customer teams to ensure mission success.

Develop and support quantum algorithms and software, collaborate with customers and cross-functional teams, build MVPs for quantum and AI use cases, and apply software engineering practices to scale quantum systems in lab or agile environments.

Develop and integrate software solutions for satellite vehicles, collaborating with teams and stakeholders to ensure mission requirements are met.

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.

The Senior Developer Technology Engineer will optimize GPU applications in the public sector by collaborating with developers, crafting parallel algorithms, and improving software stacks while ensuring high performance on GPUs.

Design, develop, and integrate real-time sensor fusion and perception algorithms across heterogeneous platforms and sensors. Deploy ML models and containerized solutions to embedded Linux devices, support DoD field tests, perform computer-/hardware-in-the-loop testing, and collaborate with tracking and autonomy teams to deliver and document robust autonomy solutions.

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.

Embed with federal clients to design, build, and deploy production-grade Palantir Foundry solutions and data pipelines. Translate disparate data into ontologies and applications, iterate rapidly, and deliver measurable operational impact while collaborating with technical and non-technical stakeholders.

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 .NET web applications and services using C#, ASP.NET, Entity Framework, and SQL Server. Participate in full SDLC, write unit/integration tests, perform troubleshooting and vulnerability remediation, use Git/GitLab, and collaborate with senior developers and cross-functional teams. Support O&M tasks and follow secure coding practices under senior mentorship.