Full Stack Developer - Angular / AWS SourceFlyFull Stack Developer - Angular / AWSAshburn, VirginiaTechnical knowledge is insufficient to establish credibility in this operating environment; expertise must be enhanced with rapid acquisition of mission knowledge and demonstrated commitment positive mission outcomes; therefore, we seek self-starters who are capable of independent exploration and knowledge acquisition, willing to develop informal support networks, and with an appreciation for the immense challenge of safeguarding the Nation’s borders. As an SME member, you will also play a key role in architectural decisions, mentoring junior developers, and driving best practices within the team Applicants should note that while some formal training exists to support building knowledge of missions and the implementation of data-driven solutions, much of the knowledge must be gained through on-the-job training and individual initiative.
Front End Developer Cayuse HoldingsFront End DeveloperWashington, Washington, DC$145,000–$151,258 / yearYou will collaborate closely with UX designers, backend engineers, and product teams to implement clean, maintainable components and deliver intuitive, accessible, and secure user experiences. Overview: The Front-End Developer will build responsive, high‑performance user interfaces using React, TypeScript, JavaScript, Node.js, HTML, and CSS, ensuring seamless integration with.
Intermediate Full Stack Java REACT Developer ERP InternationalIntermediate Full Stack Java REACT DeveloperLaurel, MD$110,000–$140,000 / yearWork collaboratively as a full stack developer on Agile Scrum teams and complete user stories and develop usable code independently with minimal oversight and guidance. Contribute to an atmosphere of cross-functional teamwork within the organization; contributes to acceptance/functional testing duties and part of incremental feature development.
Sr. .NET Full Stack Developer Applied Information SciencesSr. .NET Full Stack DeveloperWashingtonCore Knowledge & Skills: Operates independently or as a team lead, selects appropriate persistence technologies (e.g., EF, Dapper), defines source control strategies, and designs subsystem infrastructure. Teamwork & Communication: Provides functional leadership by setting objectives, organizing resources, resolving conflicts, and engaging confidently with both internal and external stakeholders.
Senior Database Developer SwiftSenior Database DeveloperHerndon, VirginiaDetermination of official compensation or salary relies on several different factors including, but not limited to: level of position, complexity of job responsibilities, geographic location, work experience, education, certifications, Federal Government contract labor categories, and contract wage rates. Responsibilities: Designing, developing, and managing database systems, particularly focusing on AWS RDS for PostgreSQL and SQL databases.
Senior Full Stack Java REACT Developer ERP InternationalSenior Full Stack Java REACT DeveloperLaurel, MD$130,000–$160,000 / yearWork collaboratively as a full stack developer on Agile Scrum teams and complete user stories and develop usable code independently with minimal oversight and guidance. Contribute to an atmosphere of cross-functional teamwork within the organization; contributes to acceptance/functional testing duties and part of incremental feature development.
Full Stack Developer Syntelligent Analytic SolutionsFull Stack DeveloperWashingtonSyntelligent Analytic Solutions, LLC provides uniquely qualified personnel with the expertise and tools needed to fulfill our customers’ management and technical requirements in the intelligence, defense, homeland security and commercial market space. 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.
Software Developer Ardent Principles, Inc.Software DeveloperHerndon, Virginia$130,000–$260,000 / yearWe are looking for a Software Developer who is skilled in developing modern web‑service applications using JavaScript‑capable technologies, applying security patches and vulnerability assessments, and supporting the application accreditation process to ensure secure, compliant software delivery. Examples include JavaScript, Java; ASP.NET; Scripting languages (Perl, PHP, Ruby on Rails); and Rich UI Plugins (Flex, Silverlight, Google Earth Plugin).
Junior Developer ActioNet IncJunior DeveloperDCAbout ActioNet ActioNet is a dynamic, award-winning SEI CMMI Level 4 and ISO 20000/ISO 27000 I Certified IT Services Firm that specializes in Enterprise Software Development involving Full Lifecycle Methodology, Project Management, Information Systems Security, Systems Integration and Training. We are passionate about the inspirational missions of our customers and we entrust our employees and teams to deliver exceptional performance to enable the safety, security, health and well-being of our nation.
Sr. Full Stack Developer BDR Solutions LLCSr. Full Stack DeveloperHerdon, VARemote$130,000–$150,000 / yearCompensation decisions depend on a wide range of factors, including but not limited to skill sets, experience and training, security clearances, licensure and certifications, and other business and organizational needs. Our service and solution delivery starts with understanding each client's end-state, and then seamlessly integrating within each Agency's organization to improve and enhance business and technical operations and deployments.
Aerospace Software Engineer/Developer Johns Hopkins Applied Physics LaboratoryAerospace Software Engineer/DeveloperLaurel, MarylandFull timeWe are seeking a software engineer/developer to help us develop and translate algorithms, concepts and approaches for the mission planning, fire control and guidance of missile systems to flight-ready software. in Aerospace, Mechanical, or Electrical Engineering; Computer Science; applied mathematics; or related technical field with relevant experience in modeling and simulation of flight systems.
Senior Java Developer StratAcuity Staffing Partners IncSenior Java DeveloperVienna, VA$150,000–$195,000 / yearIn terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Job Description: Essential Functions, Responsibilities & Duties may include, but are not limited to: Accurately represent customer requirements, i.e., gather and interpret relevant data and information, using excellent listening, interpersonal, written, and oral communication skills.
Software Developer Advisor II Noblis IncSoftware Developer Advisor IIChantilly, VA$90,700–$141,775 / yearCompensation at Noblis is determined by various factors, including but not limited to, the combination of education, certifications, knowledge, skills, competencies, and experience, internal and external equity, location, clearance level, as well as contract-specific affordability, organizational requirements and applicable employment laws. Support the PM in multiple areas which include systems, mission, and enterprise engineering; program management; analytic support; technical analysis; testing; DevSecOps; architecture; and customer outreach and support.
Sharepoint Developer H2 Performance ConsultingSharepoint DeveloperWashington, DCExperience with Corsa Works, SharePoint Designer, SharePoint Framework toolchain (SPFx Tools) MS SQL 2016 or higher, MS Info Path, MS Power Platform (Power Automate, Power BI, etc.). Supporting existing applications encompassing custom client-side code, SharePoint Web Parts, Complex workflows, InfoPath Forms, etc.
11years PowerApps Developer Senior - Hybrid - In person interview GoIntellects11years PowerApps Developer Senior - Hybrid - In person interviewWashington, District of Columbia$68–$70 / hourReplies within 24 hours Role: PowerApps Developer Senior Client: DC Government Location: Washington, DC (Hybrid - In person interview) Job Description: Work Location Requirement The candidate must be willing to work 3 to 4 days on site. The contractor shall establish suitable processes and systems to guarantee the most regimented organization of resources involved in the support of the QuickBase Applications including project tracking and knowledge management.
SharePoint Developer H2 Performance ConsultingSharePoint DeveloperWashington, DCExperience with Corsa Works, SharePoint Designer, SharePoint Framework toolchain (SPFx Tools) MS SQL 2016 or higher, MS Info Path, MS Power Platform (Power Automate, Power BI, etc.). Supporting existing applications encompassing custom client-side code, SharePoint Web Parts, Complex workflows, InfoPath Forms, etc.
Java / React Developer EntarianJava / React DeveloperArlington, VirginiaOverview/ Job Responsibilities: We are seeking a Java / React developer that is responsible for designing, developing, and maintaining scalable, secure, and high-performing applications using modern Java and React technologies. From deep space to defense and civilian missions, Entarian delivers secure, mission-aligned digital solutions that drive national resilience and operational effectiveness.
Expert Power BI Developer 9th Way InsigniaExpert Power BI DeveloperWashington, DC$120,518–$150,000 / yearThe Expert Power BI Developer serves as a senior technical contributor responsible for designing, developing, implementing, refining, and supporting complex Power BI dashboards, reports, semantic models, and data visualization solutions in support of enterprise reporting, analytics, and operational decision-making. This position works closely with ETL Developers, Data Analysts, Power Apps Developers, Technical Project Managers, Scrum Masters, testers, technical writers, and Government stakeholders to translate business needs into effective reporting and dashboard capabilities.
ETL Developer 9th Way InsigniaETL DeveloperWashington, DC$77,135–$89,000 / yearThis role supports recurring and ad hoc data needs across multiple business lines and works closely with senior ETL developers, analysts, reporting developers, testers, and Government stakeholders to implement technical solutions in a production environment. The ETL Developer is responsible for supporting the development, implementation, refinement, and maintenance of ETL pipelines, data integration workflows, and transformation logic in support of enterprise reporting, analytics, and operational decision-making.
Senior ETL Developer 9th Way InsigniaSenior ETL DeveloperWashington, DC$96,414–$99,000 / yearThis role supports delivery of scalable, maintainable, and efficient data integration capabilities across multiple business lines and works closely with senior developers, analysts, reporting developers, testers, and Government stakeholders to implement requirements in a production environment. The Senior ETL Developer is responsible for developing, implementing, refining, and supporting ETL pipelines, data integration workflows, and transformation logic in support of enterprise reporting, analytics, and operational decision-making.
SIGINT Systems Developer CymertekSIGINT Systems DeveloperReston, VirginiaSIGINT Engineer, Signals Processing Developer, Intelligence Systems Developer, RF Systems Engineer, Communications Systems Developer, Cyber Intelligence Developer, Embedded Systems Developer, Electronic Warfare Engineer, Signal Analysis Engineer, Systems Integration Engineer, Intelligence Solutions Architect, etc. Electrical Engineering, Computer Science, Information Systems, Software Engineering, Systems Engineering, Signal Processing, Telecommunications, Cybersecurity, Data Science, Computer Engineering, Physics, Mathematics, etc.
Senior Full Stack Developer ActioNet IncSenior Full Stack DeveloperWashington, DCActioNet is a CMMI-DEV Level 4, CMMI-SVC Level 4, ISO 20000, ISO 27001, ISO 9001, HDI-certified, woman-owned IT Solutions Provider with strong qualifications and expertise in Agile Software Engineering, Cloud Solutions, Cyber Security and IT Managed Services. Knowledge of least-privilege IAM, encryption, sensitive-data handling, audit logging, CloudWatch monitoring, CI/CD, infrastructure as code, automated testing, troubleshooting, and production support.
Sr. Front End React Developer DPR Construction IncSr. Front End React DeveloperDCDPR Construction is a forward-thinking, self-performing general contractor specializing in technically complex and sustainable projects for the advanced technology, life sciences, healthcare, higher education and commercial markets. We are proud to be recognized as a great place to work by our talented teammates and leading news organizations like U.S. News and World Report, Forbes, Fast Company and Newsweek.
CMS Full Stack Developer (cloud certified) Insomniac Design IncCMS Full Stack Developer (cloud certified)DC7+ years of experience in Software Development utilizing Object Oriented Design; 3+ years of experience developing custom Drupal modules; 2+ years of experience with REST API integrations; Experience with SDLC and version control systems (e.g., Git); Experience supporting the team with feedback, performance management, hiring, and mentoring; Experience leading teams through complex software implementation projects; Expertise leading projects, including various development methodologies, such as Agile, Scrum, and Waterfall; Strong understanding of SQL and Relational databases; Familiarity with web security best practices and experience in securing Drupal websites; Exceptional proficiency in coding in PHP/HTML/CSS/JavaScript and consistently developing clean, semantic, and valid markup; Ability to analyze requirements and follow detailed technical and functional specifications; Ability to work independently, prioritize tasks, and hit deadlines in a fast-paced work environment. Technical Responsibilities: Analyze customer requirements to architect and build custom websites and applications; Demonstrate a high level of expertise with technologies such as PHP and recent releases of Drupal; Build and test custom Drupal modules and hooks based on functional requirements; Exhibit a strong desire and passion for implementing new technologies to improve project outcomes continuously; Collaborate directly with the creative director, designers, project managers, user experience leads, and customers on assigned projects; Develop comprehensive test scripts to ensure the robustness and reliability of developed solutions.
Mulesoft Developer BDR Solutions LLCMulesoft DeveloperHerdon, VARemote$50,000–$90,000 / yearCompensation decisions depend on a wide range of factors, including but not limited to location, skill sets, experience and training, security clearances, licensure and certifications, and other business and organizational needs. Our service and solution delivery starts with understanding each client’s end-state, and then seamlessly integrating within each Agency’s organization to improve and enhance business and technical operations and deployments.
ETL Developer (2025-0117) Acclaim Technical ServicesETL Developer (2025-0117)Bethesda, MD$180,000–$190,000 / yearIntegrating with big data and cloud technologies: Seamlessly integrate NiFi with various databases, big data ecosystems, and cloud platforms (e.g., AWS, OCI, Azure), demonstrating familiarity in relevant services (e.g., Kafka, Elasticsearch, S3, SQS/SNS). Learn more here Employee Resources .Pay Range: There are many 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.
Senior Full Stack Developer ExpressionSenior Full Stack DeveloperWashington, DCRemoteFounded in 1997 and headquartered in Washington DC, Expression provides data fusion, data analytics, AI/ML, software engineering, information technology, and electromagnetic spectrum management solutions to the U.S. Department of Defense, Department of State, and national security community. In this position, you will have opportunities to work with small, feature-focused teams to engineer solutions, mentor team members, and collaborate with our staff of data scientists, DevSecOps engineers, and product designers to contribute to our Agile development process.
Microsoft Dynamics 365 Developer Senior Manager Protiviti IncMicrosoft Dynamics 365 Developer Senior ManagerMcLean, VA$146,000–$234,000 / yearImagining our work as a journey, we believe integrity guides our way, inclusion moves us forward together, innovation creates new destinations, and our commitment to success empowers us to deliver on our vision to be the most trusted global consulting firm. You'll develop strategies to solve complex business problems using new ways of thinking, and devise solutions to support your clients' needs through using the latest tools and methods.
NewSenior Full Stack Developer GRVTYSenior Full Stack DeveloperSterling, VA$130,000–$200,000 / yearPay Range: At GRVTY, we understand that compensation is influenced by many factors—such as geographic location, federal contract labor categories, wage rates, prior experience, skillsets, education, and certifications. The Williamsburg and Epsilon programs produce Mission Management web applications for the Intelligence Community, leveraging cloud-based microservices architecture.
Full Stack Developer JCD StaffingFull Stack DeveloperWashington, DCThis role is ideal for a hands-on developer with experience across Microsoft technologies, modern web development, Power Platform, and general AI-assisted development tools. Working knowledge of Microsoft 365 tools, including SharePoint Online, Teams, Outlook, Excel, Word, and OneDrive.
NewFull-Stack Developer, Senior Technica CorporationFull-Stack Developer, SeniorChantilly, Virginia$131,000–$150,000 / yearFull timeMust 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. . From our locations across the DC Metro area, Hampton, Virginia, and Huntsville, Alabama, we provide technological subject matter expertise, program management and business process knowledge as a trusted advisor in support of our Department of Defense and other Federal Agency customers.
Senior SQL Developer AnnexaSenior SQL DeveloperWashingtonThe work includes development and maintenance of consulting relationships with multiple agencies that have unique systems, data, programs, business and problems requirements; project planning; coordination of multiple projects; identification of problems; and development of alert native solution. The ideal candidate will possess strong analytical skills, proficiency in data management tools, and the ability to communicate effectively with stakeholders, driving continuous improvement in data quality and governance.
NewJava Developer Bridge Core (BCore)Java DeveloperMcLean, Virginia$160,000–$200,000 / yearFull timeBcore accelerates decisive advantage for warfighters and intelligence professionals by fusing human insight, rapid-fire engineering, precision-measured outcomes, and relentless grit into mission-ready solutions. Whether it’s architecting critical IT solutions, producing actionable intelligence, or developing cutting edge technology, we succeed because of the expertise, collaboration, and agility of our teams.
Full Stack Python Developer NSSFull Stack Python DeveloperHerndon, VirginiaMust have: Strong hands-on experience building Python APIs/services (Flask/FastAPI preferred) and integrating with databases, search platforms, and external systems. Government contractor is seeking a Full Stack Python Developer to build and scale user-facing and backend applications that power AI/ML capabilities for the DoD Search Portfolio.
Integration & PaaS Developer (OIC / VB Studio) TechWishIntegration & PaaS Developer (OIC / VB Studio)Sterling, VARemoteThe ideal candidate has hands-on experience building modern, responsive user interfaces using Oracle Visual Builder Studio (VBS) and integrating them with enterprise applications. In this role, you will be responsible for designing, developing, and deploying custom Platform-as-a-Service (PaaS) extensions and integration solutions within the Oracle Integration Cloud (OIC) ecosystem.
Oracle Database Developer (GIS) AnnexaOracle Database Developer (GIS)WashingtonAnnexa is currently supporting D.C. Government's Office of the Chief Technology Officer, and we are looking for a Oracle Database Developer with GIS experience to join our team. Performs monitoring, maintenance, or reporting on real- time databases, real-time network and serial data communications, and real-time graphics and logic applications.
Java Developer (API) StratAcuity Staffing Partners IncJava Developer (API)Merrifield, VARemote$65–$70 / hourIn terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. This role is ideal for developers who enjoy owning services end-to-end, building systems from scratch, and solving complex technical challenges in a distributed, remote environment.
NewKnowledge Management Analyst / Power Platform and SharePoint Developer George ConsultingKnowledge Management Analyst / Power Platform and SharePoint DeveloperWashington, DCExperiential familiarity developing solutions with at least two of the following is required and with more than two is a plus:AI BuilderCoPilot Virtual AgentsMicrosoft FabricPowerBIPower PagesPower AppsPower AutomateDataverseExperience with developing or maintaining SharePoint Apps required;Experience with DEVSECOPS CI/CD Pipelines such as Gitlab, Github, Atlassian and Azure DevOps (ADO).Strong problem-solving skills and the ability to analyze business requirements and translate them into technical solutions. Job Title: Knowledge Management Analyst / Power Platform and SharePoint DeveloperJob Location(s): Washington, DC - Washington Navy YardJob Description:As a Power Platform Developer and Knowledge Management Analyst, you will be responsible for designing, developing, and deploying scalable and intuitive solutions using the Microsoft Power Platform leveraging SharePoint and other Data sources.
Lead Java Developer Artech LLCLead Java DeveloperMcLean, VA$100 / hourThe ideal candidate will be responsible for technical leadership, system design, code quality, and mentoring a team of developers while working closely with architects, product owners, and stakeholders. We are looking for an experienced Java Lead Developer to design, develop, and lead enterprise-grade applications.
Peoplesoft Developer - Global Payroll Atlas Technologies IncPeoplesoft Developer - Global PayrollAlexandria, VARemoteThe candidate should also have experience working in a Scaled Agile Framework (SAFe) delivery environment and be able to build and test Epics, Features, Users Stories, conduct Software Demonstrations and receive Acceptance Criteria for delivery backlog items to roll out Global Payroll in an incremental and iterative fashion to the government. This role supports large-scale enterprise solutions and requires a blend of technical leadership, problem-solving, and the ability to work with both functional and technical teams.
Full Stack Software Developer/Engineer CACIFull Stack Software Developer/EngineerSterling, Virginia$69,100–$141,500 / yearJob Title: Full Stack Software Developer/EngineerJob Category: EngineeringTime Type: Full timeMinimum Clearance Required to Start: TS/SCIEmployee Type: RegularPercentage of Travel Required: Up to 10%Type of Travel: LocalAnticipated Posting End: 7/10/2027 The Opportunity: CACI is seeking a Software Developer to join a multidisciplined team to work on delivering the next generation of mission management systems using cutting edge cloud native technologies following an extreme agile continuous deployment software development framework. 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.
Senior/Staff Software Engineer, Developer Experience CohereSenior/Staff Software Engineer, Developer ExperienceDCYoull build the systems, frameworks, and culture that allow the rest of engineering to own quality themselves; improving and extending our testing platform by creating the infrastructure that allows engineers to write and execute tests, and enable every engineering team to ship with more confidence. Design and implement automation pipelines that support comprehensive testing across multiple environments with varying feature flags and realistic customer data profiles.
ServiceNow Software Designer/Developer NewGen TechnologiesServiceNow Software Designer/DeveloperChantilly, VirginiaLead engineering projects and technical processes through the Systems Development Life Cycle (SDLC), ensuring the team meets deliverables, achieves positive outcomes, and stays within scope and budget. Oversee the delivery of well-developed and engineered solutions as deployable packages, ensuring Operations teams can transition solutions to production environments with minimal manual intervention and high success rates.
Full Stack Developer Northramp LLCFull Stack DeveloperWashington, DCRemoteThe Full Stack Developer will collaborate closely with software engineers, cloud architects, data engineers, DevSecOps professionals, product owners, quality engineers, and security teams to develop and deliver secure, reliable applications within a modern Agile environment. Partner with developers, quality engineers, security teams, data engineers, and DevSecOps professionals to resolve technical challenges and deliver integrated solutions.
AWS Admin/Full Stack Developer Leidos Holdings IncAWS Admin/Full Stack DeveloperChantilly, VA$107,900–$195,050 / yearWork with various cloud platforms such as AWS, Microsoft Azure, Google Cloud and others, and focus on day-to-day operations of the environment, handling tasks such as provisioning, monitoring, troubleshooting, and optimizing cloud resources and systems. Deep working knowledge of public cloud providers (AWS, Microsoft Azure, Google Cloud) and services (compute, networking, storage, databases).
Full Stack Developer GliaCell TechnologiesFull Stack DeveloperLaurel, MDFull timeWe also provide customer solutions in the areas of CND, CNE, and CNO by providing our customers with assessments and solutions in Threat Mitigation, Vulnerability Exposure, Penetration Testing, Threat Hunting, and Preventing Advanced Persistent Threat. Bother the Seniors: Actively seek out our senior developers to review your code, explain complex architectural decisions, and absorb their hard-earned wisdom (they like it, we promise).
Senior Reverse Engineer / CNO Developer GliaCell TechnologiesSenior Reverse Engineer / CNO DeveloperLaurel, MDFull timeWe also provide customer solutions in the areas of CND, CNE, and CNO by providing our customers with assessments and solutions in Threat Mitigation, Vulnerability Exposure, Penetration Testing, Threat Hunting, and Preventing Advanced Persistent Threat. You will act as a reverse engineer/general-purpose CNO software engineer for up-and-coming projects where you will design, develop, prototype, modify, and integrate solutions to provide mission-centric results.
Senior CNO NetDev Developer GliaCell TechnologiesSenior CNO NetDev DeveloperLaurel, MDFull timeWe also provide customer solutions in the areas of CND, CNE, and CNO by providing our customers with assessments and solutions in Threat Mitigation, Vulnerability Exposure, Penetration Testing, Threat Hunting, and Preventing Advanced Persistent Threat. You will act as a general-purpose CNO reverse engineer for network based devices for up-and-coming projects where you will design, develop, prototype, modify, and integrate solutions to provide mission-centric results.
Senior Full-Stack Developer Securiport LLCSenior Full-Stack DeveloperReston, VAThe Senior Full-Stack Developer builds the software that makes the service operable - the integration with the national customs system and port-community data, the software solutions and internal tools (including tools that draw on external data sources), and the secure data flows between the field, the analysis team and the customs administration. Develop software solutions and internal tools - including tools that integrate with external data sources (such as commercial international trade-price data) - that power the teams price-verification and risk work, and build and maintain the verification console and interfaces that present outputs and reporting in a usable, auditable form.
Java Developer (SME) Leidos Holdings IncJava 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.