Full-Stack Software Engineer (Top Secret clearance)

STR•Arlington, MA

22h•$140,000 - $190,000•Hybrid

About The Position

STR is seeking an experienced Full-Stack Software Engineer to design and deliver high-impact web applications for defense and intelligence missions. The role focuses on AI- and data-centric applications that help users analyze information, make decisions, and work effectively with advanced software systems. These are mission-focused applications for operational and analytical use, rather than corporate or marketing websites. The role is open to experienced developers through technical leads and is not entry-level. The engineer will contribute to a new development effort from design through implementation and demonstration. The role is hybrid, with a target of two days in either the Woburn, Massachusetts, or Arlington, Virginia, office. The position covers front-end development and user experience, back-end services and integration, and collaborative delivery. The engineer will build responsive React applications and reusable components; translate design direction into production interfaces; collaborate with designers, stakeholders, users, and clients to define requirements and refine workflows; implement APIs and supporting services; contribute to architecture and integration decisions; and help develop AI-enabled interfaces, data visualizations, and complex mission workflows. The engineer will also improve application performance, accessibility, and maintainability; support demonstrations and user-feedback cycles; help transition prototypes to deployed capabilities; and contribute to technical documentation and user training guides. STR is a technology company focused on advanced research and development for defense, intelligence, and national security, including cyber, next-generation sensors and communications, electronic warfare, and artificial intelligence. It describes its workplace as a collaborative learning environment that recognizes team members’ contributions and achievements.

Requirements

U.S. citizen with 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 responsive across browsers and devices.
Strong experience with React, JavaScript or TypeScript, HTML, and CSS, and 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 workflow and usability.
Good judgment in 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 as part of a collaborative team.

Nice To Haves

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.

Responsibilities

Develop a new application 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 design, workflow definition, and iteration with designers and stakeholders.
Develop efficient, high-performance components for data visualization and user interaction, including large datasets and complex mission workflows.
Partner with designers, engineers, program leads, end users, and clients to refine workflows, requirements, and interaction patterns.
Help shape reusable component libraries, patterns, and front-end foundations for use across programs.
Communicate with project teams, users, and clients to develop and document requirements.
Design and implement APIs, application state, and supporting 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 decisions 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.
Help design, integrate, and implement AI-enabled interfaces and workflows for analytics, automation, and decision-support capabilities.
Contribute to data visualization, interactive workflows, and complex interface behavior for mission-focused applications.
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 authoring software documentation, such as user training guides.
Work across multiple programs and adapt to different users, domains, and problem spaces.