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245 sr principal software engineer jobs at 87 companies in Washington, DC

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Principal Antenna Test / Sr Principal Antenna Test Engineer
Sykesville, Maryland, United States
$109k-$163k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
5+ YOEBS/MS in Electrical Eng; 5+ years (Principal) or 8+ years (Sr Principal) in RF/test; RF test equipment; software dev in C#, VB, MATLAB; DoD Secret clearance with SAP; US citizenship.
Oscilloscope, Power meter, Spectrum analyzer, Signal generator, C#, Visual Basic, MATLAB
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Principal Software Engineer
Arlington, Virginia, United States
OnsiteFull Time
Mastercard
MastercardNYSE: MA: Global payment processing and financial technology service provider.
Extensive software engineering leadership; delivery of large-scale distributed systems; cloud, AI/data platforms; strong communication and mentorship.
AWS, Cloud, DevOps, AI tooling, LLMs, distributed systems
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Principal Software Engineer
Annapolis Junction, Maryland, United States
$190k-$280k/yr OnsiteFull Time
GliaCell Technologies
GliaCell Technologies: Software and systems engineering for the intelligence community.
20+ YOEActive TS/SCI with Polygraph; US citizenship; 20+ years software engineering experience; bachelor's in CS or related; able to work independently and in a team; strong communication.
Java, NiFi, SQL, PostgreSQL, Elasticsearch
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Principal Software Engineer
Annapolis Junction, Maryland, United States
$215k-$250k/yr OnsiteFull Time
Envision Innovative Solutions
Envision Innovative Solutions: Provides technical engineering and mission support to government agencies.
12+ YOE12 years of software engineering experience; BS in computer science; experience with Java, Spring Boot, MongoDB, Kubernetes, AWS; TS/SCI with Full Scope Polygraph clearance.
Java, Spring Boot, MongoDB, Kubernetes, Rancher, RKE2, AWS, RHEL, LLMs, S3/MinIO, Elasticsearch, NiFi
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Principal Software Engineer
Waltham or North Bethesda
$200k-$225k/yr HybridFull Time
Xometry
XometryNASDAQ: XMTR: Operates an AI-powered marketplace for custom manufacturing and prototyping.
8+ YOE8–12+ years of software development; expert in Python, React/TypeScript, AWS; strong system architecture and enterprise integration experience; Bachelor's degree in CS/Engineering or related field.
Python, React, TypeScript, AWS
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Principal Software Engineer
Annapolis Junction, Maryland, United States
$207k-$266k/yr OnsiteFull Time
Intelliforce
Intelliforce: Provides engineering and technical solutions for the intelligence community.
12+ YOETop Secret clearance with Full Scope Polygraph; US citizenship; 12+ years of software engineering; BS or higher in Computer Engineering/CS; 5 years in SIGINT/IA/IT domains; expert Java (17+), REST, Spring Boot, SOLID OO design; leadership and mentoring.
Java, Spring Boot, REST, MongoDB, Docker, Kubernetes, Elasticsearch, Logstash, Kibana, PKI, TLS, SSL, Confluence, Jira
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Sr Principal Engineer Embedded Software
Sterling, Virginia, United States
$142k-$213k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Designs and manufactures advanced aerospace and defense systems.
4+ YOEUS citizen able to obtain/maintain Top Secret/SCI clearance; advanced degree in EE/CE or related STEM with 4–8+ years embedded software experience; proficiency in C/C++, Python, Windows/Linux scripting, and revision control; hardware-in-the-loop simulation experience.
C/C++, Python, Windows, Linux, Subversion, Git, Jenkins, Jira, Bitbucket, National Instruments, SpaceWire, MIL-STD-1553, RS-422, UART
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Senior Principal Software Engineer
Annapolis Junction, Maryland, United States
$183k-$193k/yr HybridFull Time
General Dynamics Mission Systems
General Dynamics Mission SystemsNYSE: GD: Engineers secure communication and mission-critical defense technology systems.
8+ YOEBachelor's in software engineering (or related STEM) with 10+ years experience or Master's with 8+ years; ability to obtain DoD TS/SCI clearance; strong software lifecycle, embedded/Linux development, Kubernetes/CI/CD experience.
CI/CD, Kubernetes, Helm, containerd, Docker, Podman, FPGA, Linux, Model Context Protocol (MCP), AI/ML
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2mo
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Principal Software/Data Engineer
Laurel, Maryland, United States
OnsiteFull Time
Themis Insight
Themis Insight: Provides technical consulting and data analytics for national security.
19+ YOEExtensive software engineering experience; TS/SCI with polygraph; cloud infrastructure experience; strong Linux and Python; IT management understanding.
OpenStack, Linux, Python, Cloud infrastructure, COTS, GOTS
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Principal Software Engineer (ONSITE)
Fulton, Maryland, United States
$118k-$225k/yr OnsiteFull Time
RTX
RTXNYSE: RTX: RTX provides advanced aerospace and defense systems and services.
8+ YOESoftware development with OO languages (Java/C++), full lifecycle, CS fundamentals; 8+ years experience or advanced degree.
Java, C++, Angular, GraphQL, REST, Kafka, Typescript, Docker, Kubernetes, OpenShift, Redis, Postgresql, HTML/CSS
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Principal Engineer-Software Development
Irving or Alpharetta or Ashburn or Temple Terrace or Basking Ridge
$121k-$231k/yr HybridFull Time
Verizon
VerizonNYSE: VZ: Provides wireless, broadband, and telecommunications services to customers.
6+ YOEBachelor's degree or 4+ years of work experience and 6+ years of relevant experience. Requires Java, Spring Boot, JavaScript/TypeScript, React, software architecture, microservices, REST APIs, and distributed systems expertise.
Java, Spring Boot, React, JavaScript, TypeScript, Apigee, Kibana, GIT, Jenkins, AWS, GCP, Azure, Docker, Kubernetes, Kafka, SQS, Kinesis, RabbitMQ, Redis
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Principal Software Engineer
Columbia, Maryland, United States
OnsiteFull Time
BigBear.ai
BigBear.aiNYSE: BBAI: AI-powered decision intelligence for complex mission environments.
11+ YOEBachelor's in CS or Software Engineering plus 11 years' relevant experience; TS/SCI w/Poly clearance; proven experience designing and delivering complex production software, making architecture decisions, and mentoring engineers.
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4w
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Principal Software Engineer
Hanover, Maryland, United States
$200k-$245k/yr OnsiteFull Time
VTG
VTG: Provides engineering and digital modernization solutions for national security.
20+ YOEUS citizen with TS/SCI+Poly, bachelor\u0019s degree in a technical discipline, 20+ years software engineering experience, advanced Python, Protocol Buffers, gRPC, Kubernetes, and Helm expertise.
Python, Protocol Buffers, gRPC, Kubernetes, Helm, Docker, Docker Buildx, GitLab CI/CD, Java, RESTful APIs, GNU Autotools, MongoDB, etcd, Elasticsearch, RabbitMQ
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Principal Software Engineer
Columbia, Maryland, United States
OnsiteFull Time
BigBear.ai
BigBear.aiNYSE: BBAI: Provides AI-powered decision intelligence software for national security.
11+ YOEBachelor's in CS or software engineering plus 11 years relevant experience, TS/SCI w/Poly clearance, design and deliver complex production software, proficiency with modern programming, CI, source control, automated testing, and strong communication.
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1d
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Principal Engineer-Software Development
Irving or Alpharetta or Ashburn or Temple Terrace or Basking Ridge
$121k-$231k/yr HybridFull Time
Verizon
VerizonNYSE: VZ: Provides wireless, fiber-optic internet, and telecommunications services globally.
6+ YOEBachelor's degree or equivalent experience and 6+ years of relevant experience. Requires Java, Spring Boot, JavaScript/TypeScript, React, software architecture, microservices, REST APIs, and distributed systems expertise.
Java, Spring Boot, React, JavaScript, TypeScript, Apigee, Kibana, GIT, Jenkins, AWS, GCP, Azure, Docker, Kubernetes, Kafka, SQS, Kinesis, RabbitMQ, Redis
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Principal Software Engineer
Hanover, Maryland, United States
OnsiteFull Time
VTG
VTG: Provides force modernization and digital transformation for defense agencies.
20+ YOEUS citizen with Top Secret/SCI+Poly, bachelor\u0002s degree in a technical field, 20+ years software engineering experience, advanced Python, Protocol Buffers, gRPC, Kubernetes, Helm, and distributed systems expertise.
Python, Protocol Buffers, gRPC, Kubernetes, Helm, Docker, Docker Buildx, GitLab, GitLab CI/CD, Java, RESTful APIs, GNU Autotools, MongoDB, etcd, Elasticsearch, RabbitMQ
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Principal Software Engineer
Annapolis Junction, Maryland, United States
OnsiteFull Time
Base-2 Solutions
Base-2 Solutions: Delivers engineering and technology services for national security.
20+ YOERequires 20 years of software engineering experience, a computer science bachelor's degree or equivalent experience, active Top Secret/SCI clearance with full-scope polygraph, and U.S. citizenship.
Java, C#, C++, JavaScript, Python, Scala, Ruby, Go, Eclipse, NetBeans, IntelliJ IDEA, PyCharm, Visual Studio, VS Code, Windows, Unix, Linux, macOS, Atlassian Suite, JIRA, Confluence, GitHub, ServiceNow, Spring, Angular, Bootstrap, Oracle, MySQL, MongoDB, Maven, Jenkins, Docker, Kubernetes, Git, SVN, CVS, AWS, Azure, Google Cloud
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Principal Software Engineer
Germantown, Maryland, United States
$190k-$225k/yr OnsiteFull Time
AMETEK
AMETEKNYSE: AME: Manufacturer of electronic instruments and electromechanical devices.
10+ YOEBachelor's in engineering or CS, 10+ years software experience including embedded systems, image/video processing, real-time/microsecond control, proficiency in C/C++, and strong hardware collaboration and mentoring skills.
C/C++, continuous integration, DevOps
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Principal Software Engineer TS/SCI w/Poly
Fort Meade, Maryland, United States
$200k-$255k/yr OnsiteFull Time
Amentum
AmentumNYSE: AMTM: Provides engineering, technology, and mission support to government agencies.
Design, develop, test, and maintain low-level and high-performance software; proficiency with Python and ability to read C/C++ and x86 Assembly; experience with OS internals, compilers, and reverse engineering.
Python, C/C++, Assembly (x86)
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Principal Software Engineer
Washington, District of Columbia, United States
$152k-$229k/yr RemoteFull Time
Recorded Future
Recorded Future: Provides AI-driven threat intelligence to protect organizations from cyberattacks.
5+ YOE5+ years in data/backend/platform engineering; strong Python; cloud infra; Kafka/RabbitMQ; SQL/NoSQL; CI/CD; IaC; data pipelines; security data domain interest.
Python, Go, Rust, Cloud infrastructure, Kafka, RabbitMQ, PostgreSQL, MongoDB, Elasticsearch, Delta Lake, AWS Neptune, Neo4j, Flask, Django, FastAPI, CI/CD, GitHub Actions, Terraform, Infrastructure as Code
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