Principal Software Engineer - Search Infra ElasticPrincipal Software Engineer - Search InfraWashington DC, DCThis role provides technical vision and direction for Elasticsearch’s core search infrastructure, including indexing, retrieval, and relevance, and requires deep expertise in search internals and cross-team collaboration. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI.
Principal Software Engineer - Security ElasticPrincipal Software Engineer - SecurityWashington DC, DCBy taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI. • You have a solid comprehension of distributed systems security, including node-to-node mutual trust, zero-trust transport, partition tolerance, and cluster state propagation.
Principal Software Engineer - Performance Tuning ElasticPrincipal Software Engineer - Performance TuningWashington DC, DCBy taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI. This includes deep experience with benchmarking tools (e.g., flamegraphs, JMH, Rally), identifying performance regressions, and implementing algorithmic or hardware-aware optimizations.
Principal Software Engineer - Storage Engine ElasticPrincipal Software Engineer - Storage EngineWashington DC, DCRemoteThis globally distributed, fully remote team of experienced engineers develops core storage and query technologies for observability workloads, including improving storage efficiency, advancing ES|QL query processing and performance, and optimizing data layouts for object storage. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI.
NewPrincipal Geospatial Software Engineer (TS/SCI with Polygraph required) Red AlphaPrincipal Geospatial Software Engineer (TS/SCI with Polygraph required)Columbia, Maryland$190,000–$235,000 / yearOur total compensation package was strategically designed with our members in mind with the intention to: reward our members for their hard work and commitment to our customers' missions; allow members to share in Red Alpha's success as we continue to grow and expand our footprint; provide long-term career opportunities through stability and internal mobility; and provide the resources our members need to support themselves and their dependents in the form of a robust benefits package. We are seeking a skilled and motivated Principal Geospatial Software Engineer to join our team in developing cutting-edge geospatial analysis, ETL (Extract, Transform, Load), and visualization microservices to support mission-focused systems.
Principal Software Engineer - AI Platform ZoomInfoPrincipal Software Engineer - AI PlatformBethesda, MDRemote$163,800–$257,400 / yearCollaborating with PMs, designers, and engineers you will rapidly drive innovation by building intelligent systems that power cutting edge user experiences, create valuable insights for our customers, and drive revenue growth. In addition to deploying scalable, observable, cost-efficient production AI services, you'll be working with leading LLM technologies to build an agentic AI platform that multiplies your impact across teams.
Principal Embedded Software Engineer- Onsite Curtiss-WrightPrincipal Embedded Software Engineer- OnsiteAshburn, VirginiaImplement and integrate, or debug embedded software including bootloaders (BIOS, SlimBootLoader and U-Boot), device drivers (Linux and VxWorks), customized applications and embedded test software, and product simulation and production test software. Hands-on and demonstrable experience with software development using C/C++, Linux (Red Hat, LynxOS, WindRiver), VxWorks (7.x), Linux and VxWorks device drivers, Scripting(bash/csh), high-level application software, Python, LabVIEW and IPMI.
Principal Systems Engineer Software Integration BAE Systems PlcPrincipal Systems Engineer Software IntegrationRockville, MD$118,095–$200,762 / yearAbout BAE Systems Intelligence & Security BAE Systems, Inc. is the U.S. subsidiary of BAE Systems plc, an international defense, aerospace and security company which delivers a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. Job Description BAE Systems is seeking a Principal Systems Engineer with a strong software focus for System Integration efforts in support of our work as a prime contractor on a high-profile U.S. Navy weapon system.
Principal Software Reverse Engineer STRPrincipal Software Reverse EngineerArlington, VA$204,000–$284,000 / yearReverse engineering complex software or firmware targets, ranging from typical Windows/Linux binaries to embedded firmware running non-traditional computer architectures and operating systems. Offers are based on factors, such as but not limited to, the candidate's experience, education, training, key skills/critical skills, security clearances, and prevailing market and business conditions.
Senior Principal Software Engineer – (Secret Clearance Preferred – Onsite Required) GD Information TechnologySenior Principal Software Engineer – (Secret Clearance Preferred – Onsite Required)Oakton, VirginiaThis challenging and interesting software engineering and development position is a chance to participate in the development and operation of a high-performance big data system, and join a longstanding, stable program consisting of a team of individuals using defined Agile software principles and practices. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available.
Principal Engineer, Ground System Software (R5199) Shield AI IncPrincipal Engineer, Ground System Software (R5199)Washington, DC$125,000–$230,000 / yearIntegrate sensors, effectors, communications, navigation, autonomy, mission management, command-and-control, data-processing, and vehicle services in collaboration with hardware, FPGA, cybersecurity, safety, systems, integration, and test teams. Define and execute verification strategies across HIL/SIL laboratories, simulations, test benches, flight-test environments, and deployed systems using automated, performance, stress, fault-injection, interface, and timing tests.
[Active Secret] Senior Software Engineer - JobID-0018 Innovative Defense Technologies[Active Secret] Senior Software Engineer - JobID-0018Arlington, Virginia$135,000–$273,000 / yearInnovative Defense Technologies (IDT), provider of cutting-edge cloud-based integration, automated testing and data analysis for complex, mission-critical systems in the US Department of Defense (DOD), is seeking a Senior Software Engineer to be part of our Advanced Capabilities team and based out of our Arlington, VA location. What You Will Do: Support full development lifecycle including system design, implementation, integration, test, and deployment of complex systems supporting DoD and Navy operational.
Principal Software Architect PeopleNTech LLCPrincipal Software ArchitectAlexandria, VARemote$85–$90 / hourArchitecture & Platform Governance Own and evolve the cross-platform architecture spanning (C++/C# Windows applet, BHFTP transmitter, ASP.NET Proactive portal), (cloud SaaS, instrument fleet API, data pipeline), and Unity Next (QC engine, LIS/HL7 integration, Unity Connect middleware, peer-comparison analytics). On-Instrument & Integration Systems Guide Applet architecture: C++ Win32 service host, IMonitoredEntity driver plugin model (Drives Info, Running Processes, System Info, ME Collect), DCC output contract, and AppletSoftwareUpdateManager CAB update pipeline.
Senior Principal Engineer Bright Vision TechnologiesSenior Principal EngineerSterling, VARemoteFull timeThe ideal candidate will drive strategic engineering decisions, serve as a technical authority across multiple teams and platforms, and combine deep technical mastery with mature judgment, broad influence, and the ability to mentor and elevate senior engineers across the organization. This role represents the highest level of individual technical contribution within the organization, requiring deep expertise in system design, performance engineering, reliability architecture, and cross-organizational technical leadership.
Front End Engineer SR Principal- TS/SCI with Polygraph GD Information TechnologyFront End Engineer SR Principal- TS/SCI with PolygraphChantilly, VirginiaTechnical skills: Extensive experience with Angular, Expert knowledge of JavaScript, HTML and CSS, experience designing complex search interfaces, experience in optimizing web applications for performance and usability, experience integrating with third part API's, proficient understanding of code versioning tools, such as Git, experience with Linux operating systems. The Front- End Software Engineer must have: Education: Bachelor’s degree in computer science, Electrical or Computer Engineering or a related technical discipline, or the equivalent combination of education, technical training, or work/military experience.
Principal Hardware Design Engineer LeidosPrincipal Hardware Design EngineerLaurel, MarylandAs part of a multidisciplinary engineering team, you will serve as a senior technical authority, guiding complex engineering efforts, advancing innovative design methodologies, and helping shape the future direction of hardware engineering capabilities supporting national security missions. As a Principal Hardware Design Engineer, you will provide expert technical guidance across complex engineering efforts while developing innovative hardware solutions, advancing reverse engineering methodologies, and mentoring engineering teams.
Principal Systems Engineer Power3 SolutionsPrincipal Systems EngineerLaurel, MarylandThe Level 3 System Engineer (SE) shall possess the following capabilities: Manage system requirements and derived requirements to ensure the delivery of production systems that are compatible with the defined system architecture(s) ± Department of Defense Architecture Framework (DoDAF), Service-oriented Architecture (SOA), etc. Establish a process to formally and proactively control and manage changes to requirements, consider impacts prior to commitment to change, gain stakeholder buy-in, eliminate ambiguity, ensure traceability to source requirements, and track and settle open actions.
Senior Principal Radiation Effects Engineer BAE Systems PlcSenior Principal Radiation Effects EngineerManassas, VA$132,962–$226,035 / yearAbout BAE Systems Electronic Systems BAE Systems, Inc. is the U.S. subsidiary of BAE Systems plc, an international defense, aerospace and security company which delivers a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. The ideal candidate should have a good understanding of radiation testing for space applications, radiation effects, space environments, PCB board design, package design, high frequency digital technologies, mixed signal IC technologies, and electrical testing of RF and digital circuits.
Senior Principal ASIC Implementation Engineer BAE Systems PlcSenior Principal ASIC Implementation EngineerManassas, VA$132,962–$226,035 / yearYou would be a member of the team whose products have been deployed in commercial, civil and national security space missions; including GPS, weather monitoring, satellite TV and radio, exploring the universe; most notably the Mars rovers, Spirit and Opportunity. Additional work opportunities would include electronic warfare technology to deliver superior situational awareness, even in the most complex battlespace - defeating threats long before they can be seen.
Sr. Principal Reverse Engineering/Vulnerability Research Engineer Clarity Innovations LLCSr. Principal Reverse Engineering/Vulnerability Research EngineerHerndon, VAClarity Innovations is a trusted national security partner, dedicated to safeguarding our nation's interests and delivering innovative solutions that empower the Intelligence Community (IC) and Department of Defense (DoD) to transform data into actionable intelligence, ensuring mission success in an evolving world. We are committed to delivering cutting-edge tools and capabilities that address the most complex national security challenges, empowering our partners to stay ahead of emerging threats and ensuring the success of their critical missions.