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Lead Knowledge Graph Engineer (All levels Software Engineer)
Chantilly, Virginia, United States
OnsiteFull Time
1+ YOEDesign and scale knowledge‑graph infrastructure; build high‑throughput backend services in Python/C++/Rust; API design (REST/GraphQL/gRPC); PostgreSQL and Neo4j experience; security eligibility for U.S. government clearances.
Python, C++, Rust, REST, GraphQL, gRPC, PostgreSQL, Neo4j, SOAP
1w
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Security Automation (SOAR) Engineer
Reston, Virginia, United States
OnsiteFull Time
8+ YOEActive TS/SCI with CI Polygraph, bachelor’s degree,8+ years experience, IAT Level II and CSSP certifications, SOAR playbook automation, Python/JavaScript/TypeScript, SQL/GraphQL, REST API and webhook integration.
SQL, GraphQL, Python, JavaScript, TypeScript, ChatGPT, Grok, Claude, Claude Code, Codex, REST API, webhook
1mo
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Software Integration Engineer
Warrenton or Fort Eisenhower or Centennial or Augusta
$150k-$200k/yr OnsiteSeasonal
8+ YOEU.S. citizen with active TS/SCI, Bachelor's in CS/IS/Software Engineering, minimum 8 years relevant experience, end-to-end API/integration ownership, experience with REST/SOAP/GraphQL and Kafka/Azure Service Bus/SQS.
APIs, REST, SOAP, GraphQL, Kafka, Azure Service Bus, SQS
1w
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Software Development Engineer
Philadelphia or Reston
OnsiteFull Time
5+ YOE5+ years building and operating distributed backend systems, experience with GraphQL/REST APIs, Python/Go/Java/C++, relational or NoSQL databases, containerized deployments and CI/CD; Bachelor's preferred; must be authorized to work in the US (no sponsorship).
GraphQL, REST, PostgreSQL, Python, Go, Java, C++, Docker, Kubernetes, MLOps, CI/CD
2mo
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Java Backend Developer Senior
Ashburn, Virginia, United States
OnsiteFull Time
9+ YOEBachelor's in CS or related field; 9+ years Java development; JavaEE, Spring, Spring Boot; AWS, Docker, Kubernetes; Kafka/SQS/Kinesis; NoSQL; REST/GraphQL; CI/CD tools; on-site Ashburn, VA; US citizenship with CBP background.
Java, JavaEE, Spring, Spring Boot, AWS, Docker, Kubernetes, Kafka, SQS, Kinesis, NoSQL, MongoDB, DocumentDB, Cassandra, XML, JSON, Unix/Linux, JPA/Hibernate, REST, GraphQL, Jenkins, Maven, Gitlab, Jira, Dynatrace, Harness
2mo
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Software Development Engineer - US Federal
Reston, Virginia, United States
$137k-$205k/yr OnsiteFull Time
5+ YOESecurity clearance TS/SCI w/ CI Poly; 5+ years in UML, web/app development, OO languages; bachelor’s degree in computer-related field; experience designing/developing business applications; strong collaboration and communication; JSON/REST/GraphQL a plus.
Java, Python, C++, C#, JSON, REST, GraphQL, Object-Oriented Design, Design Patterns
2mo
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Senior Computer Scientist
Reston, Virginia, United States
OnsiteFull Time
12+ YOETS/SCI with Poly; MS in Data Science/CS/Statistics/Math; 12+ years in data science/analytics/ML for intelligence/defense; Python/R/SQL; data visualization; ML; knowledge graphs; SPARQL/GraphQL; AI/ML model development for analytic tradecraft.
Python, R, SQL, Power BI, Tableau, SPARQL, GraphQL
2mo
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Java Backend Developer Senior
Ashburn, Virginia, United States
OnsiteFull Time
9+ YOEBachelor's degree in computer science or related field; 9+ years Java experience; strong Java/JEE, Spring, Spring Boot; experience with Docker/Kubernetes, AWS; SQL/NoSQL, REST/GraphQL; CI/CD tools; Agile familiarity; US citizenship and public trust eligibility.
Java, JavaEE, Spring, Spring Boot, Docker, Kubernetes, AWS, WebLogic, Maven, Artifactory, Jenkins, GitLab, Jira, JPA/Hibernate, SQL, Oracle, NoSQL, Kafka, SQS, Kinesis, XML, JSON, GraphQL, Unix/Linux
1mo
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Software Developer SME (Systems Software) (TS/SCI with Poly Required)
Dulles, Virginia, United States
$164k-$275k/yr OnsiteFull Time
10+ YOEUS citizen with active TS/SCI + polygraph required; 10+ years experience; strong Java and JavaScript (ES6+) skills, React or Lit, Bootstrap, RESTful APIs/GraphQL, Git, front-end testing (Playwright, Jest, Mocha, Cypress), performance optimization, and UI/UX integration experience.
Java, JavaScript, ES6+, React, Lit, Bootstrap, RESTful APIs, GraphQL, Git, Playwright, Jest, Mocha, Cypress
1w
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Sr. Systems Engineer, Platform/Infrastructure
Sterling, Virginia, United States
OnsiteFull Time
10+ YOEActive TS/SCI with CI Polygraph, DoD 8140 Security+ CE, STEM bachelor's or master's,10+ years Linux/cloud systems experience, DevOps and IdAM skills, database and container experience.
Linux, ServiceNow, PostgreSQL, MySQL, MongoDB, Active Directory, SAML, OpenLDAP, OAuth 2.0, OIDC, Ansible, Terraform, Jenkins, GitLab, Rancher, Kubernetes, Azure, Google Cloud Platform (GCP), Oracle Cloud Infrastructure (OCI), IBM Cloud, Grafana, Splunk, REST, GraphQL, ETL
3w
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Sr. Systems Engineer - Platform/Infrastructure (TS/SCI w/ CI Poly required)
Sterling, Virginia, United States
OnsiteFull Time
10+ YOEActive TS/SCI w/ CI Poly, Sec+ or equivalent, 10+ years experience, STEM bachelor's or master's, Linux and cloud expertise, DevOps tooling, container platforms, database and API integration skills.
Linux, PostgreSQL, MySQL, MongoDB, ServiceNow, Active Directory, SAML, OpenLDAP, OAuth 2.0, OIDC, Ansible, Terraform, Jenkins, GitLab, Rancher, Kubernetes, Grafana, Splunk, REST, GraphQL, Azure, Google Cloud, Oracle Cloud, IBM Cloud
2w
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Full Stack Developer
Sterling, Virginia, United States
$122k-$253k/yr OnsiteFull Time
Experienced full-stack developer with Angular and Java/ Spring backend experience, AWS application support, TS/SCI with Polygraph required day one, bachelor\u0002s in a relevant field.
Angular, JavaScript, TypeScript, HTML, CSS, Java 8+, SpringBoot, Spring Framework, RESTful APIs, AWS, JIRA, Github, SQL, D3, GraphQL, Jenkins, Linux, AWS Services
2mo
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Senior Platform/Tier3 Engineer
Sterling, Virginia, United States
$150k-$254k/yr OnsiteFull Time
10+ YOE10+ years relevant experience; Bachelor’s or Master’s in a STEM field; DoDD 8140/Security+ CE; Top Secret/SCI with polygraph required; expertise with Linux, cloud architecture, databases, IdAM, DevOps tooling, containers, and strong troubleshooting and documentation skills.
PostgreSQL, MySQL, MongoDB, ServiceNow, Active Directory, SAML, OpenLDAP, OAuth 2.0, OIDC, Ansible, Terraform, Jenkins, GitLab, Rancher, Kubernetes, Grafana, Splunk, REST, GraphQL, MBSE, Azure, Google, Oracle, IBM
2mo
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Software Engineer: Front-End
Herndon, Virginia, United States
OnsiteFull Time
8+ YOEFront-End engineer with React/Vue/Angular/Next.js; TS preferred; 8+ years experience; TS/SCI clearance; location Herndon, VA; US citizenship.
React, Vue, Angular, SolidJS, Next.js, Typescript, Vite, react-query, TailwindCSS, Openlayers, Playwright, Yup, MUI, Bootstrap, RESTful APIs, GraphQL
1w
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Senior Full Stack Developer
Herndon, Virginia, United States
OnsiteFull Time
8+ YOEBachelor's degree,8+ years experience,US citizenship,ability to obtain/maintain Public Trust (High) clearance; strong Python,AWS,Amazon Connect,API,JSON,serverless,DevOps,testing,and mentoring skills.
Python, AWS Lambda, Amazon Connect, JSON, API Gateway, EventBridge, SQS, SNS, Step Functions, DynamoDB, S3, CloudWatch, IAM, Secrets Manager, GraphQL, SQL
1mo
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AI Model Developer
Fairfax or Ashburn
$125k-$150k/yr HybridFull Time
3+ YOEBachelor's degree in CS/AI/Data Science, US citizenship and ability to obtain Public Trust, 3+ years AI/ML and full-stack experience, strong Python and ML framework skills, backend/frontend and cloud/DevOps familiarity.
Python, NumPy, Pandas, scikit-learn, TensorFlow, PyTorch, Transformers, Django, Flask, FastAPI, React, Angular, Vue.js, PostgreSQL, MySQL, MongoDB, Redis, Docker, Kubernetes, CI/CD, AWS, Microsoft Azure, GCP, GitHub workflows, Matplotlib, Plotly, D3.js, GraphQL, JavaScript, TypeScript, Next.js, AWS Bedrock, GCP AI Platform, Microsoft Azure ML, GitHub Actions
2mo
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Java API Developer
Herndon, Virginia, United States
HybridFull Time
3+ YOEBachelor’s degree and 2–5 years of experience with Java, JavaScript, API-based software; TS/SCI with CI Poly clearance required.
Java, Spring Boot, JavaScript, REST APIs, GraphQL, SOAP, Postman, Swagger UI, Apache Kafka, NiFi, SQL, NoSQL, Git, AWS, Azure, GCP, Docker, Kubernetes
3w
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Senior Software Engineer
Herndon, Virginia, United States
$135k-$216k/yr OnsiteFull Time
10+ YOEActive TS/SCI (or eligibility) and polygraph, 10+ years software engineering experience, proficiency in Java/JavaScript/SQL/Python, RHEL/Oracle environments, REST/JSON/Spring, and modern CI/CD and container tools.
Java, JavaScript, SQL, Python, RHEL, ORACLE, Git, GitLab, Jenkins, PostgreSQL, Oracle, REST, JSON, Spring, Spring Boot, Ember.js, Nextjs/React, GraphQL, Docker, KeyCloak, Wildfly, Tomcat, ArcGIS, EC2, S3, RDS
3w
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Senior Software Engineer
Herndon, Virginia, United States
$135k-$216k/yr OnsiteFull Time
10+ YOE12+ years experience (Bachelors) or 10+ years (Masters); active TS/SCI with polygraph or ability to obtain; experience with Java, JavaScript, SQL, Python, RHEL, Oracle/PostgreSQL, REST/JSON, Spring/Spring Boot, modern JS frameworks, Docker and related middleware; SCIF work.
Java, JavaScript, SQL, Python, RHEL, ORACLE, PostgreSQL, Oracle, REST, JSON, Spring, Spring Boot, Ember.js, Nextjs/React, GraphQL, Docker, KeyCloak, Wildfly, Tomcat, ArcGIS, Git, Jenkins, GitLab, EC2, S3, RDS
2w
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Computer Security Incident Report Analyst with TS/SCI Clearance [Salesforce National Security]
Herndon, Virginia, United States
$111k-$122k/yr OnsiteFull Time
2+ YOEU.S. citizen with active TS/SCI with Polygraph, 2+ years cybersecurity/incident response experience, technical degree or equivalent, SIEM and cloud security experience, strong communication and problem-solving skills.
Security Information and Event Manager (SIEM), AWS, Splunk, Azure Sentinel, ElasticStack, Kibana, Grafana, SQL, SPL, GraphQL, Bash, Python, Mac OSX, Microsoft Windows, Linux/Unix