1519 Software Developers jobs in Lorton

Momentum Engineering, Inc., a Woman-Owned Small Business (WOSB), fosters an employee-centric culture. Our strength lies in our people. With a high percentage of employees holding advanced degrees in engineering, computer science, and related disciplines, we bring deep technical expertise to every mission. Our team includes professionals with security clearances and full-scope polygraphs, ensuring trusted, secure support for the most sensitive national security initiatives. Additionally, our workforce is equipped with industry-leading certifications, demonstrating a commitment to continuous learning and excellence. Most importantly, our exceptional employee retention rate reflects a culture of professional growth, mission focus, and dedication-ensuring long-term stability and expertise for our customers' critical needs.

Job Summary

• Seeking Software Developers to join our team and help accelerate a federal mission client's discovery and delivery of identity and network-based intelligence insights to counter national security threats and malicious actors
• Software developers will assist in crafting, testing, and recommending scalable, flexible, and resilient designs and implement integrations with a standard platform in a cloud environment
• The ideal candidate will have experience in strategizing overall build tools and software to facilitate information and data sharing, and advance analytic practices

• Employ software development techniques and methodologies for solving tough analytical challenges in support of one of national security threats
• Use software development skills to automate manual analytical processes
• Opportunity to expand upon beyond specializations to include front end user interfaces, back end microservices, web services, cloud architectures, as well as databases and other persistent data stores
• Deploy developed IT solutions, user applications, databases, and other IT capabilities
• Design and develop specialized user solutions, applications and databases using a hybrid Agile approach within a DevOps environment
• Provide Tier 3 technical support for deployed applications and databases
• Knowledge of code versioning tools such as Git
• Experience with cloud message APIs and usage of push notifications
• Maintain code integrity and organization
• Collaborate with the rest of engineering team to design and launch new features. Includes coordination and documentation of deployment procedures, release plans, etc.
• Keen interest in learning and using the latest software tools, methods, and technologies to solve real world problem sets vital to national security
• Support off-hours deployment such as evening or weekends

• Must have active Top Secret/SCI clearance
• Understanding of cloud architectures and enabling tools and technologies, such as, AWS Cloud (GovCloud/C2S)
• Familiar with Amazon Web Managed Services (AWS)
• JavaScript, Angular, Typescript, Node.js, MongoDB, JSON, SQL, XML
• High experience level with back-end programming languages (Java/Spring, Python)
• Working knowledge with datastores MongoDB, DynamoDB, PostgreSQL, S3, Redshift, Redis, and Elasticsearch
• Familiar with technologies jQuery, ASP/.Net, NoSQL, PL/SQL, LDAP, HTTP, REST/SOAP, RDBMS
• Familiar with Configuration Management and CI Tools, such as, Git/Gitlab, Jenkins, SonarQube, Maven, Ansible, Chef
• Familiar with Linux/Unix server environments
• Experience with Agile development methodology
• Working knowledge with Collaboration tools, such as, Jira and Confluence

• Working knowledge with software platforms and services, such as, Docker, Kubernetes, JMS/SQS/SNS, Kafka, AWS Lambda, NiFi
• Working knowledge with public keys and digital certificates
• Experience with automated testing patterns and tools, such as, Mocha/Chai, JUnit, NUnit, TestNG
• Experience with DevOps environments
• Expertise in various COTS, GOTS and open-source tools which support development of data integration and visualization applications
• Experience with cloud message APIs and usage of push notifications
• Specialization in Object Oriented Programming languages, scripting, and databases
• Familiar with Python, Groovy, Shell Script

• Employ software development techniques and methodologies for solving tough analytical challenges in support of one of national security threats
• Use software development skills to automate manual analytical processes
• Opportunity to expand upon beyond specializations to include front end user interfaces, back end microservices, web services, cloud architectures, as well as databases and other persistent data stores
• Deploy developed IT solutions, user applications, databases, and other IT capabilities
• Design and develop specialized user solutions, applications and databases using a hybrid Agile approach within a DevOps environment
• Provide Tier 3 technical support for deployed applications and databases
• Knowledge of code versioning tools such as Git
• Experience with cloud message APIs and usage of push notifications
• Maintain code integrity and organization
• Collaborate with the rest of engineering team to design and launch new features. Includes coordination and documentation of deployment procedures, release plans, etc.
• Keen interest in learning and using the latest software tools, methods, and technologies to solve real world problem sets vital to national security
• Support off-hours deployment such as evening or weekends.

• Understanding of cloud architectures and enabling tools and technologies, such as, AWS Cloud (GovCloud/C2S)
• Familiar with Amazon Web Managed Services (AWS)
• JavaScript, Angular, Typescript, Node.js, MongoDB, JSON, SQL, XML
• High experience level with back-end programming languages (Java/Spring, Python)
• Working knowledge with datastores MongoDB, DynamoDB, PostgreSQL, S3, Redshift, Redis, and Elasticsearch
• Familiar with technologies jQuery, ASP/.Net, NoSQL, PL/SQL, LDAP, HTTP, REST/SOAP, RDBMS
• Familiar with Configuration Management and CI Tools, such as, Git/Gitlab, Jenkins, SonarQube, Maven, Ansible, Chef
• Familiar with Linux/Unix server environments
• Experience with Agile development methodology
• Working knowledge with Collaboration tools, such as, Jira and Confluence

• Working knowledge with software platforms and services, such as, Docker, Kubernetes, JMS/SQS/SNS, Kafka, AWS Lambda, NiFi,
• Working knowledge with public keys and digital certificates
• Experience with automated testing patterns and tools, such as, Mocha/Chai, JUnit, NUnit, TestNG
• Experience with DevOps environments
• Expertise in various COTS, GOTS and open-source tools which support development of data integration and visualization applications
• Experience with cloud message APIs and usage of push notifications
• Specialization in Object Oriented Programming languages, scripting, and databases
• Familiar with Python, Groovy, Shell Script

• Minimum education requirements: Bachelor's Degree
• Years Experience: 4-8 Years relevant experience
• Part time or full time: Full Time
• Flexibility option: High Co-Location

Responsibilities & Qualifications

RESPONSIBILITIES

The Full Stack Developer will design, build, and scale the user-facing and backend components of an agentic AI platform, enabling intuitive visibility into model and data governance, performance, and compliance. Individual developers will focus within a team environment on either UX / Front-End Development or Agentic Agent Integration.

• UX / Front-End Development

• Build responsive, human-centered dashboards that allow analysts and stakeholders to view, search, and interact with model/data cards, performance scorecards, and compliance status.

• Implement intuitive interfaces to visualize agent behavior, decision flows, and operational states, supporting human-in-the-loop feedback.

• Collaborate with UX designers to incorporate gamified and feedback-driven UI patterns that encourage best-practice analytic behavior.

• Backend Services & Integration

• DevelopDevelop backend services and APIs to manage model/data card repositories, metadata registries, and ATO-related configuration data.

• Integrate data from model pipelines, governance systems, and agent telemetry into centralized views and dashboards.

• Ensure secure, role-based access control (RBAC) and audit logging are implemented throughout the stack.

• Agentic Agent Integration

• Build front-end and back-end components enabling analysts to task, monitor, and collaborate with agentic AI agents.

• Provide structured views for planner/meta-reasoner outputs, agent self-IV&V reports, and ATO compliance metrics.

• Implement RESTful and event-driven interfaces (AWS EventBridge) for real-time communication between agents and UI components.

REQUIRED QUALIFICATIONS

• Bachelor's degree in Computer Science, Software Engineering, or a related field.

• 3+ years of hands-on experience building full-stack web applications in production environments.

• Strong proficiency in Python (for back-end services) and modern front-end frameworks (React, js, or Angular).

• Experience designing REST APIs and microservice architectures; containerization using Docker/Kubernetes.

• Familiarity with data/ML systems and integrating outputs from AI pipelines into front-end user experiences.

• Understanding of security, RBAC, and CI/CD practices in DevSecOps environments.

DESIRED QUALIFICATIONS

• Master's degree in Computer Science, Human-Computer Interaction, or a related field.

• Experience with:

• Agentic AI user interfaces and collaborative human-agent workflows.

• Building model/data card dashboards and compliance/ATO visualization tools.

• Working within NGA CORE or other National Geospatial-Intelligence Agency (NGA)/Intelligence Community (IC) secure data environments.

• Contributing to or extending open-source AI or full-stack frameworks.

• Active TS/SCI clearance (or ability to obtain one).

Overview

We are seeking a Full-Stack Developer to support National Geospatial-Intelligence Agency (NGA) Artificial Intelligence (AI) efforts. This developer will play an important role helping to create technical solutions for multiple AI challenges.

TekSynap is a fast-growing high-tech company that understands both the pace of technology today and the need to have a comprehensive well planned information management environment. "Technology moving at the speed of thought" embodies these principles - the need to nimbly utilize the best that information technology offers to meet the business needs of our Federal Government customers.

We offer our full-time employees a competitive benefits package to include health, dental, vision, 401K, life insurance, short-term and long-term disability plans, vacation time and holidays.

Visit us at .

Apply now to explore jobs with us!

The safety and health of our employees is of the utmost importance. Employees are required to comply with any contractually mandated Federal COVID-19 requirements.

By applying to a role at TekSynap you are providing consent to receive text messages regarding your interview and employment status. If at any time you would like to opt out of text messaging, respond "STOP." As part of the application process, you agree that TekSynap Corporation may retain and use your name, e-mail, and contact information for purposes related to employment consideration.

Additional Job Information

WORK ENVIRONMENT AND PHYSICAL DEMANDS

The work environment characteristics described here are representative of those an employee encounters while performing the essential functions of the job. Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions.

• Location: Reston, VA and/or remote. Occasional travel within the National Capital Region (NCR)

• Type of environment: Varies

• Noise level: Low

• Work schedule: "Normal work hours" constitute on average 8 hours a day, 40 hours per week (excluding breaks and meal periods) within standard operational hours occurring , Monday-Friday, excluding Federal holidays. May be requested to work evenings and weekends to meet program and contract needs.

• Amount of Travel: 10%

PHYSICAL DEMANDS

The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

While performing the duties of this job, the employee is regularly required to use hands to handle, feel, touch; reach with hands and arms; talk and hear. The employee is regularly required to stand, walk, sit; climb or balance; and stoop, kneel, crouch, or crawl. The employee is frequently required to lift up to 25 pounds; and up to 50 pounds. The vision requirements include close vision, distance vision, peripheral vision, depth perception, and ability to adjust focus.

WORK AUTHORIZATION/SECURITY CLEARANCE

U.S Citizenship

Clearance requirement: TS/CI with CI Poly

OTHER INFORMATION

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.

TekSynap is a drug-free workplace. We reserve the right to conduct drug testing in accordance with federal, state, and local laws. All employees and candidates may be subject to drug screening if deemed necessary to ensure a safe and compliant working environment.

EQUAL EMPLOYMENT OPPORTUNITY

In order to provide equal employment and advancement opportunities to all individuals, employment decisions will be based on merit, qualifications, and abilities. TekSynap does not discriminate against any person because of race, color, creed, religion, sex, national origin, disability, age, genetic information or any other characteristic protected by law (referred to as "protected status"). This nondiscrimination policy extends to all terms, conditions, and privileges of employment as well as the use of all company facilities, participation in all company-sponsored activities, and all employment actions such as promotions, compensation, benefits, and termination of employment.

TekSynap is committed to ensuring that our online application process provides an equal employment opportunity to all job seekers, including individuals with disabilities. If you believe you need a reasonable accommodation in order to search for a job opening or to submit an application, please contact for assistance.

Job Locations US-National Capital Region

ID

Category Software

Type Regular Full-Time

More than 7 years of experience as a full stack developer. Experience developing applications with core Java, Hibernate, JDBC, JSP, Servlets, Web Services, REST, Spring MVC/Boot/Cloud. Experience of working in JavaScript frameworks (Go/React/Angular).

• 3+ years of combined experience in any of the following: Developing web applications using JavaScript/Typescript and a related framework (Angular, React, or Vue) including building HTML and CSS
• Experience with server-side application development using Java, C#, or Python
• Experience with usability analysis, automated testing development (unit and E2E)
• Experience with switching between different languages and learning new ones, as necessary
• Experience in working closely with software development teams
• Experience with Kafka, Kubernetes, Git, Node.Js, SQL, Python

• DoD 8570 Compliant Security+ or CISSP Certification prior to starting on contract
• Experience with Java Spring Framework
• Experience with testing frameworks, including Jasmine, Karma, or Selenium
• Experience with Linux scripting in BASH or Perl
• Experience with using JavaScript visualization libraries, including D3, Leaflet, and AG Grid
• Experience with information security
• Experience with Agile/Kanban development methodologies
• Knowledge of JIRA, Confluence, Git, and GitHub/GitLab
• Knowledge of standards in JavaScript, JSON, REST, CORS, Web architecture, and HTTP specification
• TS/SCI clearance required

Description

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• Split role between data engineering and Python engineering, focused on migration from standard databases to a Snowflake data warehouse
• Support transition from risk division databases to a centralized warehouse to enable standardized business reporting
• Perform Python and PySpark development along with ETL and Informatica responsibilities
• Handle scheduling and workflow tasks in Control-M to support data pipelines and integrations
• Work as part of a team of 3-4 developers, a tech lead, and team manager, with additional engineers joining later, leveraging Informatica, Python, PySpark, and SQL as core tools

• Python
• Pyspark
• MongoDB
• SQL.
• ETL
• Understanding of Agile practices.

• Preferred Snowflake and Informatica.
• Data warehousing
• Automation testing

• Python
• Pyspark
• MongoDB
• SQL
• ETL
• Agile practices.

• Recruiter
• Email
• Phone
• Sudhir Swami

M9 Solutions is dedicated to providing IT services and solutions to the Federal Government by mobilizing the right people, skills, clearance levels, and technologies to help organizations who desire improved performance and modern, sustainable change. M9 has provided quality IT services and support to more than 30 Federal Agencies and multiple commercial customers nationwide. Our capabilities include digital transformation, software development, cloud migration, applications & infrastructure, cybersecurity, data delivery & analytics, and IT talent solutions.

M9 Solutions is seeking a Full Stack Developer to work (hybrid) on a government contract for a client located in Washington, DC. An active TS/SCI clearance is required.

Responsibilities

• Employ software development techniques and methodologies for solving tough analytical challenges vital to national security.
• Use software development skills to automate manual analytical processes.
• Opportunity to expand beyond specializations to include front end user interfaces, back end microservices, web services, cloud architectures, as well as databases and other persistent data stores.
• Deploy developed IT solutions, user applications, databases, and other IT capabilities.
• Design and develop specialized user solutions, applications, and databases using a hybrid Agile approach within a DevOps environment.
• Provide Tier 3 technical support for deployed applications and databases.
• Maintain code integrity and organization.
• Collaborate with the rest of the engineering team to design and launch new features. This includes coordination and documentation of deployment procedures, release plans, etc.
• Support off-hours deployment on evenings or weekends.

• TS/SCI security clearance.
• Bachelor's degree or higher is required.
• 2 - 8+ years of relevant experience.
• Knowledge of code versioning tools such as Git.
• Experience with cloud message APIs and usage of push notifications.
• Understanding of cloud architectures and enabling tools and technologies, such as AWS Cloud (GovCloud/C2S).
• Familiar with Amazon Web Managed Services (AWS).
• JavaScript, Angular, Typescript, Node.js, MongoDB, JSON, SQL, XML.
• High experience level with back-end programming languages (Java/Spring, Python).
• Working knowledge of datastores MongoDB, DynamoDB, PostgreSQL, S3, Redshift, Redis, and Elasticsearch.
• Familiar with technologies jQuery, ASP/.Net, NoSQL, PL/SQL, LDAP, HTTP, REST/SOAP, RDBMS.
• Familiar with Configuration Management and CI tools such as Git/Gitlab, Jenkins, SonarQube, Maven, Ansible, Chef.
• Familiar with Linux/Unix server environments.
• Experience with Agile development methodology.
• Working knowledge of collaboration tools such as Jira and Confluence.
• Keen interest in learning and using the latest software tools, methods, and technologies to solve real world problem sets vital to national security.

• Working knowledge of software platforms and services such as Docker, Kubernetes, JMS/SQS/SNS, Kafka, AWS Lambda, NiFi.
• Working knowledge of public keys and digital certificates.
• Experience with automated testing patterns and tools such as Mocha/Chai, JUnit, NUnit, TestNG.
• Experience with DevOps environments.
• Expertise in various COTS, GOTS and open-source tools which support development of data integration and visualization applications.
• Specialization in Object Oriented Programming languages, scripting, and databases.
• Familiar with Python, Groovy, Shell Script.

• M9 Solutions' pay range for this position is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include, but are not limited to, responsibilities of the position, education, experience, knowledge, skills, abilities, as well as internal equity, location, alignment with market data, applicable bargaining agreement (if any), or other law.
• M9 Benefits -

We are a world-class team of professionals who deliver next generation technology and products in robotic and autonomous platforms, ground, soldier, and maritime systems in 50+ locations world-wide. Much of our work contributes to innovative research in the fields of sensor science, signal processing, data fusion, artificial intelligence (AI), machine learning (ML), and augmented reality (AR).

QinetiQ US's dedicated experts in defense, aerospace, security, and related fields all work together to explore new ways of protecting the American Warfighter, Security Forces, and Allies. Being a part of QinetiQ US means being central to the safety and security of the world around us. Partnering with our customers, we help save lives; reduce risks to society; and maintain the global infrastructure on which we all depend.

Why Join QinetiQ US?

If you have the courage to take on a wide variety of complex challenges, then you will experience a unique working environment where innovative teams blend different perspectives, disciplines, and technologies to discover new ways of solving complex problems. In our diverse and inclusive environment, you can be authentic, feel valued, be respected, and realize your full potential. QinetiQ US will support you with workplace flexibility, a commitment to the health and well-being of you and your family and provide opportunities to work with a purpose. We are committed to supporting your success in both your professional and personal lives.

We are seeking an experienced Full Stack Developer to serve as the primary developer and maintainer of our existing web application. This role requires a self-directed professional who can own the complete software development lifecycle while working closely with business stakeholders and end users. The ideal candidate will have strong experience with Flask/React applications and containerized deployments.

Development & Maintenance

Serve as primary developer and maintainer for existing web application built with Flask backend and React frontend (legacy versions)

• Own end-to-end software lifecycle including design updates, development, testing, deployment, and production support

• Perform bug fixes, troubleshooting, and performance tuning to ensure optimal system stability and availability

• Refactor and modernize legacy code to improve maintainability and performance when feasible

Infrastructure & DevOps

• Manage and maintain containerized deployments using Docker Compose and AWS EC2

• Apply security patches, library upgrades, and system updates in a timely manner

• Monitor system health and proactively address potential issues

Stakeholder Collaboration

• Collaborate with Business Analyst and user base to review feature requests, triage bugs, and establish development priorities

• Function as co-product owner alongside Business Analyst to evaluate incoming requests and establish realistic timelines

• Interact directly with end users to clarify requirements, troubleshoot issues, and deliver effective solutions

Documentation & Communication

• Write and maintain comprehensive technical documentation

• Provide clear communication on project status, technical challenges, and solutions

Experience

• 4+ years of full stack web development experience
• Bachelor's Degree in an IT-related discipline

• Experience maintaining and enhancing legacy applications

• Background working directly with business stakeholders and end users

• Demonstrated experience in production environment management

• Clearance Level Must Be Able to Obtain: DOD Secret

Technical Skills

• Strong proficiency in Python and Flask framework

• Solid experience with React and modern JavaScript

• Experience with Docker and containerization technologies

• Familiarity with AWS services, particularly EC2

• Understanding of web application architecture and best practices

• Knowledge of version control systems (Git)

• Experience with database management and optimization

• Secret clearance or willingness to obtain one
• Knowledge of CI/CD pipelines
• Familiarity with monitoring and logging tools

• Experience with database migrations and schema management

• Background in security best practices for web applications

Accessibility/Accommodation:

If because of a medical condition or disability you need a reasonable accommodation for any part of the employment process, please send an e-mail to or call Opt. 4 and let us know the nature of your request and contact information.

QinetiQ US is an Equal Opportunity employer. All Qualified Applicants will receive equal consideration for employment without regard to race, age, color, religion, creed, sex, sexual orientation, gender identity, national origin, disability, or protected Veteran status.

BigBear.ai is seeking Software Developers to join our team and help accelerate a federal mission client’s discovery and delivery of identity and network-based intelligence insights to counter national security threats and malicious actors. Our software developers will assist in crafting, testing, and recommending scalable, flexible, and resilient designs and implement integrations with a standard platform in a cloud environment. The ideal candidate will have experience in strategizing overall build tools and software to facilitate information and data sharing and advance analytic practices.

• Employ software development techniques and methodologies for solving tough analytical challenges in support of one of national security threats
• Use software development skills to automate manual analytical processes
• Opportunity to expand beyond specializations to include front end user interfaces, back end microservices, web services, cloud architecture, as well as databases and other persistent data stores
• Deploy developed IT solutions, user applications, databases, and other IT capabilities
• Design and develop specialized user solutions, applications and databases using a hybrid Agile approach within a DevOps environment
• Provide Tier 3 technical support for deployed applications and databases
• Knowledge of code versioning tools such as Git
• Experience with cloud message APIs and usage of push notifications
• Maintain code integrity and organization
• Collaborate with the rest of engineering team to design and launch new features. Includes coordination and documentation of deployment procedures, release plans, etc.
• Keen interest in learning and using the latest software tools, methods, and technologies to solve real world problems sets vital to national security
• Support off-hours deployment such as evening or weekends

• Must possess and maintain a TS/SCI
• Understanding of cloud architecture and enabling tools and technologies, such as, AWS Cloud (GovCloud/C2S)
• Familiar with Amazon Web Managed Services (AWS)
• JavaScript, Angular, Typescript, Node.js, MongoDB, JSON, SQL, XML
• High experience level with back-end programming languages (Java/Spring, Python)
• Working knowledge with datastores MongoDB, DynamoDB, PostgreSQL, S3, Redshift, Redis, and Elasticsearch
• Familiar with technologies jQuery, ASP/.Net, NoSQL, PL/SQL, LDAP, HTTP, REST/SOAP, RDBMS
• Familiar with Configuration Management and CI Tools, such as, Git/Gitlab, Jenkins, SonarQube, Maven, Ansible, Chef
• Familiar with Linux/Unix server environments
• Experience with Agile development methodology
• Working knowledge with Collaboration tools, such as, Jira and Confluence

• Working knowledge with software platforms and services, such as, Docker, Kubernetes, JMS/SQS/SNS, Kafka, AWS Lambda, NiFi,
• Working knowledge with public keys and digital certificates
• Experience with automated testing patterns and tools, such as Mocha/Chai, JUnit, NUnit, TestNG
• Experience with DevOps environments
• Expertise in various COTS, GOTS and open-source tools which support development of data integration and visualization applications
• Experience with cloud message APIs and usage of push notifications
• Specialization in Object Oriented Programming languages, scripting, and databases
• Familiar with Python, Groovy, Shell Script

BigBear.ai is a leading provider of AI-powered decision intelligence solutions for national security, supply chain management, and digital identity. Customers and partners rely on Bigbear.ai’s predictive analytics capabilities in highly complex, distributed, mission-based operating environments. Headquartered in McLean, Virginia, BigBear.ai is a public company traded on the NYSE under the symbol BBAI. For more information, visit and follow BigBear.ai on LinkedIn: @BigBear.ai and X: @BigBearai.

BigBear.ai is an Equal opportunity employer all protected groups, including protected veterans and individuals with disabilities.