As/400 Senior Developer Hub InternationalAs/400 Senior DeveloperWashington, DC$120,000–$150,000 / yearDrive IBM i modernization initiatives by championing modern development tooling (VS Code with Code for IBM i, RPG/CLP editing) in place of traditional green-screen tools, integrating AI-assisted development practices where applicable, and migrating source code management to Git/GitHub to support version control, branching, and collaborative development workflows on the AS/400 platform. The expected salary range for this position is $ 120,000 to $150,000 and will be impacted by factors such as the successful candidate's skills, experience and working location, as well as the specific position's business line, scope and level.
Ontology Software Developer (TS/SCI) Vantor ServicesOntology Software Developer (TS/SCI)Herndon, Virginia$220,000–$242,000 / yearWorking within an Agile DevSecOps environment, the Software Engineer collaborates with ontology engineers, database engineers, data scientists, and Government stakeholders to deliver secure, high-performance applications that leverage Semantic Web technologies and AI/ML capabilities. This position develops scalable applications, APIs, and microservices that integrate ontology-driven data models, knowledge graphs, and enterprise data sources to support Object-Based Intelligence workflows.
NewSenior .NET Developer Revolutional, LLCSenior .NET DeveloperWashington, DC$115,000–$130,000 / yearExperience designing and building solutions using modern AI services and platforms, with a strong preference for candidates familiar with Microsoft AI offerings (e.g., Azure AI Services, Azure OpenAI), Microsoft Foundry, and Python. We apply modern capabilities, including AI/ML, cloud, cybersecurity, and IT modernization to solve complex challenges, enable faster and more secure operations, and drive measurable mission outcomes.
NewSenior API Integration Developer Basecamp Consulting & Solutions LLCSenior API Integration DeveloperReston, VAFull timeThe work is hands-on development, from API design through containerized deployment and the regression validation that proves a migrated route behaves as it did before. Design, build, and maintain RESTful services and API contracts published through the enterprise gateway, including OpenAPI specifications and versioning.
Senior Software Developer II - Full Stack BLENSenior Software Developer II - Full StackWashington, District of Columbia$135,000–$170,000 / yearHowever, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractor’s legal duty to furnish information. Experience working with both relational databases such as PostgreSQL, MySQL, and NoSQL databases like Firestore, MongoDB, ensuring effective database design, optimization, and scalability.
Software Developer IQUASAR LLCSoftware DeveloperArlington, VAFull timeExperienced in designing, implementing, and analyzing simulations involving extensive datasets, ensuring efficient data processing and accurate modeling outcomes. · Knowledge and experience with relational databases such as Oracle, MySQL, PostgreSQL, MariaDB, Microsoft SQL Server.
Java Developer (Sme) Leidos Holdings Inc.Java Developer (Sme)Bethesda, MD$154,050–$278,475 / yearDocument and perform systems software development, including deployment of build artifacts across different environments leveraging GitFlow constructs and using industry leading DevOps tools like GitHub, Jenkins, and scripting (e.g., python, bash). Support the Agile software development lifecycle following Program SAFe practices while coordinating closely with team members, Product Owners and Scrum Masters to ensure User Story alignment and implementation to customer use cases.
Senior Java Fullstack Developer Pyramid, IncSenior Java Fullstack DeveloperMcLean, VA$160 / hourFull timeExperience in code delivery pipelines and adept in Build and Deployment tools using - Shell script, Maven, Gradle, ANSIBLE and Jenkins. A bachelor’s degree in computer science or a related field, or an equivalent combination of education and experience from which comparable knowledge and skills were acquired.
NewSoftware Developer CACISoftware DeveloperChantilly, VirginiaPay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. We value team members who strive to produce high quality work through collaboration with team members and customers while making a difference through individual contributions to ensure project success for our team and our customers.
NewSoftware Developer NS2 MissionSoftware DeveloperChantilly, VAThis role offers the opportunity to work on modern Java applications, scalable backend services, and complex system integrations while collaborating with a team of engineers focused on delivering reliable, high-performing solutions. If you are interested in applying for employment with NS2 Mission and are in need of accommodation or special assistance to navigate our website or to complete your application, please send an e-mail with your request to Recruiting Operations Team: NS2Mission.
Full Stack .NET Developer Revolutional, LLCFull Stack .NET DeveloperManassas, VA$150,000–$180,000 / yearWe apply modern capabilities, including AI/ML, cloud, cybersecurity, and IT modernization to solve complex challenges, enable faster and more secure operations, and drive measurable mission outcomes. To perform the above job successfully, an individual must possess the knowledge, skills, and abilities listed; meet the education and work experience required; and must be able to perform each essential duty and responsibility satisfactorily.
Full Stack Developer CACIFull Stack DeveloperChantilly, VirginiaPay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. We are seeking a Full Stack developer that is interested and passionate about working as part of a modern, fast-paced agile software development team supporting a ServiceNow implementation.
NewSr. Full Stack Java Developer Applied Information SciencesSr. Full Stack Java DeveloperWashingtonMust have strong development experience required in the following technologies/areas: Java, Spring Framework/Security 6+, Spring Boot 3+, Hibernate 6+, SQL/PLSQL, PostgreSQL, RESTful APIs, Maven build tool, and Git/GitLab. . The ideal candidate will have demonstrated strong verbal and written skills, experiences with the technology and business tools listed below, and will have proven experience delivering large-scale enterprise applications from concept through deployment. .
NewFull Stack Developer, Senior Cayuse HoldingsFull Stack Developer, SeniorWashington, Washington, DC$140,000–$142,085 / yearThis role is responsible for designing and implementing modern UI components, secure RESTful APIs, and scalable data architectures, as well as supporting application deployments, CI/CD pipelines, and full life cycle software development within an Agile environment. Database Design & Data Migration Design and implement normalized PostgreSQL schemas and entity relationships to support system scalability, performance, and maintainability.
Senior Full Stack Developer Cayuse HoldingsSenior Full Stack DeveloperChantilly, Virginia$140,000–$142,085 / yearIntegrate software components and third-party services; develop new custom capabilities; and enhance, refactor, and maintain existing codebases to improve reliability, scalability, and performance. The ideal candidate has extensive experience delivering large-scale, enterprise-grade applications from initial concept through deployment, with a strong focus on quality, performance, security, and maintainability in an enterprise environment.
SW Developer - Operational Systems Engineer CACISW Developer - Operational Systems EngineerChantilly, VirginiaThe successful candidate will provide a professional evaluation, use-case alignment, and assessment of the potential technology stack, including support for physical hardware, KVM, Proxmox, and VMWare-based and other hypervisor platforms and tradeoffs before initial implementation with management approval. Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.
NewSenior Software Developer VTGSenior Software DeveloperHerndon, VirginiaFull timeResearch data sources and technical solutions in order to effectively extract, transform, and load data into a database for data processing and analysis. • Coach junior team members on software development best practices, highlighting the impacts of design decisions, and making code efficient.
NewSenior Java Developer ICONMA, LLCSenior Java DeveloperMcLean, VA$87.99 / hourProven ability to perform R&D using AI, including evaluating AI-assisted approaches, rapidly prototyping solutions, and validating outcomes (e.g., prompt engineering, model/tool evaluation, and integrating AI capabilities into workflows or applications). Experience building RESTful APIs and working with common Java frameworks (e.g., Spring / Spring Boot or similar).
Senior Ab Initio Developer (Big data/Hadoop) Rapinno TechSenior Ab Initio Developer (Big data/Hadoop)Reston, VirginiaUnderstanding and working (hands-on) knowledge of newer or emerging trends such as Big Data, Columnar databases, NoSQL, Hadoop, MapReduce, social media, data visualization, XML, and unstructured text is a plus. Experience in design, development and tuning industry leading ETL, Big Data, and/or Business Intelligence software tools in data intensive, large scale environments.
Database Engineer IQUASAR LLCDatabase EngineerReston, VAFull timeiQuasar LLC is a proud partner of the Military Spouse Employment Partnership (MSEP) and the Virginia Values Veterans (V3) Program, reflecting our strong commitment to supporting military spouses, veterans, and inclusive hiring practices. Configure and manage database backup and recovery strategies to ensure data integrity and availability in case of failures or data loss.