Senior Front-End Software Development Engineer

# Senior Front-End Software Development Engineer Vantor Be  an Early Applicant Full Time senior Herndon, Virginia, USPosted Today##

Role Overview Vantor is hiring a Senior Front-End Software Development Engineer. This is a full-time role in Herndon. posted today. applications are still in the early window, before most candidates have applied. Full responsibilities, required qualifications, and the apply link are listed in the description below.## Resume Keywords to Include Make sure these keywords appear in your resume to improve ATS scoring

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Job Description Vantor is forging the new frontier of spatial intelligence, helping decision makers and operators navigate what’s happening now and shape what’s coming next. Vantor is a place for problem solvers, changemakers, and go-getters—where people are working together to help our customers see the world differently, and in doing so, be seen differently. Come be part of a mission, not just a job, where you can:
Shape your own future, build the next big thing, and change the world.

To be eligible for this position, you must be a U.S. Citizen. This position requires an active U.S. Government security clearance, applicants who do not currently hold the required clearance will not be eligible for consideration. Employment for cleared roles is contingent upon verification of clearance status.

Export Control/ITAR:
Certain roles may be subject to U.S. export control laws, requiring U.S. person status as defined by 8 U.S.C. 1324b(a)(3).Please review the job details below.

This position requires an active U.S. Government Security Clearance at the TS/SCI with CI poly level.

We are seeking a Senior Front-End Software Engineer to support the development and modernization of a mission-critical big data analytics platform for a United States Government customer. The successful candidate will design and build secure, scalable, and intuitive web applications that enable analysts and decision-makers to access, visualize, and interact with large-scale datasets. This role requires close collaboration with product owners, UX designers, back-end engineers, data engineers, and cybersecurity personnel within an Agile development environment.

Principal Responsibilities
* Design, develop, test, and maintain modern web-based user interfaces for enterprise-scale analytics applications.
* Build responsive, accessible, and high-performance front-end solutions using contemporary JavaScript frameworks.
* Collaborate with back-end and data engineering teams to integrate APIs, data services, and visualization components.
* Develop dashboards, reporting tools, and interactive data exploration capabilities for large and complex datasets.
* Participate in architecture discussions and contribute to front-end technical strategy and best practices.
* Ensure compliance with government security, accessibility, and software quality requirements.
* Perform code reviews, mentor junior developers, and promote engineering excellence across the team.
* Support Agile ceremonies, including sprint planning, backlog refinement, and retrospectives.
* Troubleshoot and resolve production issues while continuously improving application performance and usability.
* Work at corporate office site 3 days per week.
* Work in a SCIF as program and team needs dictate.

Required Qualifications
* US citizenship and an active TS/SCI clearance is mandatory for this position and required for consideration. Must be willing to obtain a CI Poly.
* Minimum of 14 years of total professional experience in a technical support role.
* Strong UI/UX skills with a focus on building responsive, user-friendly interfaces
* Proficient in front-end and scripting languages such as JavaScript, Python, Java, and R; experienced in data extraction, manipulation, and visualization
* Experience with modern front-end frameworks such as React, Angular, or Vue.js.
* Experience consuming RESTful APIs and working with JSON-based data services.
* Strong understanding of HTML5, CSS3, responsive design, and web accessibility…