Full-Stack Software Engineer (Top Secret clearance)

STR•Arlington, VA

8h•$140,000 - $190,000•Hybrid

About The Position

STR is seeking an experienced Full-Stack Engineer to design and deliver high-impact web applications for defense and intelligence missions. The engineer will build AI- and data-centric applications that help users analyze information, make decisions, and work with advanced software systems. These are mission-focused applications for operational and analytical use, rather than corporate or marketing websites. The position is intended for experienced developers through technical leads, not entry-level candidates. The role contributes to a new development effort from design and implementation through demonstration. It is hybrid, with a target of two days at either the Woburn, Massachusetts, or Arlington, Virginia, office. The engineer will develop responsive React applications, translate design direction into production interfaces, shape workflows and reusable front-end foundations, and collaborate with designers, stakeholders, users, and clients. The role also designs APIs and back-end services, supports application and service architecture, integrates systems and AI-enabled workflows, and contributes to containerized application design and deployment where appropriate. The engineer will improve performance, responsiveness, accessibility, and maintainability; support demonstrations and user feedback cycles; help transition prototypes to deployed capabilities; and document technical decisions and software, including user training guides. STR specializes in advanced research and development for defense, intelligence, and national security, including cyber, sensors, radar, sonar, communications, electronic warfare, and artificial intelligence. The company describes its culture as collaborative and learning-oriented.

Requirements

U.S. citizenship and a Top Secret SCI-eligible security clearance.
Bachelor’s degree in a related field or equivalent experience.
At least 5 years of experience building modern, interactive, data-centric web applications that are responsive across browsers and devices.
Strong experience with React, JavaScript or TypeScript, HTML, and CSS, and with at least one of Flask, Django, Node, or Vue.
Ability to turn design direction, mockups, prototypes, or component libraries into production user interfaces.
Experience collaborating with designers, users, product owners, or other stakeholders to improve workflows and usability.
Good judgment regarding interaction design, interface clarity, and user experience.
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.
Proficiency with Git and command-line development workflows.
Ability to work independently and collaboratively.

Nice To Haves

Experience creating or refining wireframes, prototypes, or interaction flows 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.

Responsibilities

Develop a new software effort through design, implementation, and demonstration.
Build modern, responsive, reusable web applications using React and related front-end technologies.
Translate wireframes, prototypes, and design direction into production-ready interfaces with attention to usability and detail.
Contribute to interface planning, workflow definition, and design iteration with designers and stakeholders.
Develop performant components for data visualization and user interaction, including for large datasets and complex mission workflows.
Deliver user-centric and data-centric interfaces for mission-focused applications.
Collaborate with designers, engineers, program leads, end users, and clients to refine and document workflows and requirements.
Shape reusable component libraries, patterns, and front-end foundations across programs.
Design and implement APIs, application state, and back-end services for user-facing features.
Design the interface layer to back-end systems, including appropriate GraphQL solutions.
Contribute to service and back-end architecture for workflows, data access, and system integration.
Design service contracts, data flows, and back-end integration patterns.
Work across the 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.
Design, integrate, and implement AI-enabled interfaces and workflows for analytics, automation, and decision support.
Contribute to data visualization, interactive workflows, and complex interface behavior.
Improve application performance, responsiveness, accessibility, and maintainability.
Optimize applications for speed and responsiveness across 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 writing software documentation, such as user training guides.
Work across multiple programs and adapt to different users, domains, and problem spaces.