Quantum Science Solutions is hiring: App User Experience Tester in Chantilly

Job Title: Functional Tester (API & UI) / customer support Location: On-site – Chantilly, VA Clearance Required: TS/SCI with FSP Company: Quantum Science Solutions (QSS) Rate: Open Position Overview Quantum Science Solutions (QSS) is seeking an experienced Functional Tester (API & UI)/ Customer Support to join a dynamic Agile development team supporting a federal cybersecurity program in Chantilly, VA. The Functional Tester (API & UI) / Customer Support will collaborate closely with developers, system architects, and end users to validate new functionality, manage feedback loops, and ensure quality and usability across mission-critical applications. This position operates within a Flexible Agile Development Cycle delivering secure, scalable enterprise applications through collaborative design, development, integration, and sustainment efforts. The ideal candidate will have experience testing modern web-based applications, working directly with developers and stakeholders to track issues, elicit new requirements, and deliver responsive, proactive customer support. Key Responsibilities • Conduct unit and functional testing of software systems, including web-based (SPA) platforms • Document test procedures, test cases, and test results to support compliance and traceability • Collaborate with developers to validate new features and track issue resolution • Act as the Point of Contact (POC) for user issues, questions, and support requests • Work within user base by delivering timely, professional, and clear communication • Use Sponsor-provided tools to log, track, and resolve incidents, requests, and feature enhancements • Gather user feedback and elicit new functionality requirements from users and stakeholders • Create user documentation, training materials, and contribute to briefings or brown-bag sessions • Participate in Agile ceremonies, including daily stand-ups, sprint planning, and backlog refinement, to ensure timely communication of testing results and user feedback to the development team. • Support communication between technical teams and users, ensuring expectations and limitations are clearly conveyed Mandatory Skills & Experience • Experience in software testing and reporting test results • Experience with user support within a technical environment • Hands-on experience performing UI/UX functional testing for Single-Page Applications (SPAs) • Strong documentation skills, including the ability to create repeatable test plans and write user-facing materials • Proven ability to build rapport and communicate effectively with end users, engineers, and stakeholders • Demonstrated experience using JIRA for issue tracking and workflow management • Experience working on cross-functional or Agile teams involving developers, testers, and analysts Education Requirement • Bachelor’s degree in Information Systems, Business, Computer Science, or a related field • Equivalent professional experience may be accepted in lieu of a degree Certifications • ITIL Foundation (Preferred) • ISTQB Certified Tester (Preferred) Why Join QSS? At Quantum Science Solutions (QSS), you’re not just filling a role, you’re shaping mission-critical solutions that keep our nation secure. We invest in your growth, foster innovation, and reward technical excellence. Employee Benefits • Competitive compensation with annual performance bonuses • Premium Medical, Dental & Vision Insurance • Paid Time Off and Federal Holidays • 401(k) with Company Matching