Top Senior C++ Jobs in Washington, DC

Architect and develop high-performance Linux user-space daemons and middleware services for aerial and ground robots. Build robotics applications in C/C++, Rust, and Python; implement inter-process communication, device lifecycle features, sensor and actuator integration, ROS2 use cases, autonomous behaviors, and video pipelines. Design comprehensive unit and integration testing, CI pipelines, and technical documentation. Collaborate across controls, vision, hardware, firmware, and manufacturing teams while mentoring engineers and supporting products through launch and post-release.

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.

As a Staff Software Engineer, you will lead the development of Apache Iceberg, enhancing data handling capabilities for large-scale systems, collaborating with teams, and architecting solutions for modern data lakes.

The Software Engineer, Mobile Transports will advance Ditto's mobile transport technologies focusing on networking performance and reliability across platforms. Responsibilities include designing, implementing, and optimizing mobile transport infrastructure, collaborating with teams, and monitoring system performance.

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.

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 and grow a software engineering team delivering Unity platform support across cloud Linux streaming, web, iOS, and Android. Drive technical strategy, collaborate with internal teams and partners, mentor engineers, and optimize performance and developer workflows for broad device targets.

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 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.

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

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.

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, implement, and refine advanced digital signal processing algorithms to detect, classify, track, and geolocate RF emissions. Integrate and test signal processing software with RF/SDR hardware, support algorithm modeling, software integration, and field demonstrations, and collaborate with cross-functional teams.

Develop and integrate advanced RF digital signal processing algorithms to detect, classify, track, and geolocate RF emissions. Work with recorded and synthetic I/Q data, SDR hardware (including RFSOC), and host processing platforms. Support algorithm modeling, software integration, testing, and field demonstrations while collaborating with cross-functional teams.

Lead development and validation of advanced passive RF geolocation algorithms (TDOA, FDOA, interferometry). Build high-fidelity simulations, implement real-time software on DSP/GPU/FPGA, integrate with RF/SDR hardware, define RF/timing requirements, and support system calibration and field validation. Collaborate across engineering, production, and business teams; travel up to 30% and work on-site multiple days weekly.

Lead development of passive RF geolocation algorithms (TDOA, FDOA, interferometry) from first principles through simulation, real-time implementation, integration, calibration, and field validation. Build high-fidelity simulation environments, quantify performance under real-world impairments, and partner with hardware and systems teams to define RF/timing requirements and support field demonstrations.