Full-Stack Software Engineer (Top Secret clearance)

Top Secret Full Stack EngineerSTR is seeking an experienced Full Stack Engineer to design and deliver high-impact web applications for defense and intelligence missions. The successful candidate will build AI- and data-centric applications that help users analyze information, make decisions, and work effectively with advanced software systems. These are not corporate websites or marketing pages. They are mission-focused applications built for real operational and analytical use. We are seeking candidates ranging from experienced developers to technical leads; this is not an entry-level role.The Role:Develop on a new development effort through stages of design, implementation, and demonstration. This role will be hybrid with a target of 2 days in either our Woburn, MA or Arlington, VA office. Specific responsibilities include:Front-End and User Experience Build modern, responsive, and reusable web applications using React and related front-end technologies.Translate wireframes, prototypes, and design direction into production-ready interfaces with strong attention to usability and detail.Contribute to early-stage interface thinking, workflow definition, and design iteration in close collaboration with designers and stakeholders.Develop efficient, high-performance components for data visualization and user interaction, including large data sets and complex mission workflows.Deliver intuitive, user-centric and data-centric interfaces for mission-focused applications.Partner closely with designers, engineers, program leads, and end users to refine workflows, requirements, and interaction patterns.Help shape reusable component libraries, patterns, and front-end foundations that can be used across programs.Communicate with the project team, users, and clients to develop and document requirements.Back-End and Integration Design and implement APIs, application state, and supporting back-end services needed for user-facing features.Design the interface layer to the rest of the back end, including appropriate GraphQL solutions.Contribute to service and back-end architecture decisions for application workflows, data access, and system integration.Design service contracts, data flows, and backend integration patterns.Work across the full request/response path from user interaction through service logic and data access.Integrate front-end applications with supporting services and application back ends.Support containerized application design and deployment where appropriate.Help design, integrate, and implement AI-enabled user interfaces and workflows that allow users to interact effectively with advanced analytics, automation, and decision-support capabilities.Contribute to data visualization, interactive workflows, and complex interface behavior for mission-focused applications.Delivery and Teaming Improve application performance, responsiveness, accessibility, and maintainability.Optimize applications for speed and responsiveness across a variety of devices and browsers.Support demonstrations, user feedback cycles, iteration, and transition from prototype to deployed capability.Contribute to technical documentation and communicate design and implementation decisions clearly.Assist in the authorship of software documentation such as user training guides.Who You Are:Core Requirements S. Citizen with a Top Secret SCI-eligible security clearance.Bachelor's degree in related field or equivalent experience5+ years of experience building modern web applications that are interactive, data-centric, and responsive across browsers and devices.Front-End and User Experience Strong experience with React, JavaScript/TypeScript, HTML, and CSS and at least one of: Flask, Django, Node, Vue.Demonstrated ability to turn design direction, mockups, prototypes, or component libraries into production UI.Experience collaborating closely with designers, users, product owners, or other stakeholders to improve workflow and usability.Good judgment around interaction design, interface clarity, and user experience.Back-End Integration Experience designing and implementing services or back-end application layers and integrating front-end applications with APIs and supporting services.Experience with GraphQL, WebSockets, containerized deployment, or cloud-hosted application environments.Experience building, integrating, or implementing AI-enabled interfaces or workflows for user-facing applications.Delivery and Teaming Be able to work across multiple programs and adapt to different users, domains, and problem spaces.Proficiency with Git and command-line development workflows.Able to work independently and as part of a collaborative team.Even Better:Experience creating or refining wireframes, prototypes, or interaction flows in collaboration with designers.Experience contributing to design systems, component libraries, or shared UI frameworks.Familiarity with accessibility standards and building usable interfaces in constrained or specialized environments.Pay InformationFull-Time Salary Range: 140,000.00 to $190,000.00The salary range listed is based on external market data. Offers are based on factors, such as but not limited to, the candidate's experience, education, training, key skills/critical skills, security clearances, and prevailing market and business conditions.STR is a growing technology company with locations near Boston, MA, Arlington, VA, near Dayton, OH, Melbourne, FL, Carlsbad, CA, Atlanta, GA, and Denver, CO. We specialize in advanced research and development for defense, intelligence, and national security in: cyber; next generation sensors, radar, sonar, communications, and electronic warfare; and artificial intelligence algorithms and analytics to make sense of the complexity that is exploding around us.STR is committed to creating a collaborative learning environment that supports deep technical understanding and recognizes the contributions and achievements of all team members. Our work is challenging, and we go home at night knowing that we pushed the envelope of technology and made the world safer.STR is not just any company. Our people, culture, and attitude along with their unique set of skills, experiences, and perspectives put us on a trajectory to change the world. We can't do it alone, though - we need fellow trailblazers. If you are one, join our team and help to keep our society safe!STR is an equal opportunity employer. We are fully dedicated to hiring the most qualified candidate regardless of race, color, religion, sex (including gender identity, sexual orientation and pregnancy), marital status, national origin, age, veteran status, disability, genetic information or any other characteristic protected by federal, state or local laws.If you need a reasonable accommodation for any portion of the employment process, email us at View email address on click.appcast.io and provide your contact info.Pursuant to applicable federal law and regulations, positions at STR require employees to obtain national security clearances and satisfy the requirements for compliance with export control and other applicable laws.