User Interface (UI) Developer (junior/mid)

📍 Job Overview

Job Title: User Interface (UI) Developer (junior/mid)

Company: Closure Technologies

Location: Chantilly, Virginia, United States

Job Type: Full-time

Category: Software Development / Front-End Engineering

Date Posted: May 20, 2026

Experience Level: Junior to Mid-Level (0-2 years implied)

Remote Status: On-site

🚀 Role Summary

• Design, develop, test, and maintain high-quality user interfaces using modern front-end technologies, focusing on a mission-critical messaging system.

• Apply User Experience (UX) principles to ensure intuitive navigation and seamless interaction flows for end-users.

• Contribute to product enhancements by implementing modern Angular best practices and championing a consistent design system.

• Collaborate within a team of high-performing professionals supporting a global mission.

📝 Enhancement Note: While the role is titled "User Interface (UI) Developer," the responsibilities and required skills, particularly the emphasis on Angular and UX principles, strongly indicate a Front-End Developer role with a specialization in UI/UX implementation. The "junior/mid" designation suggests a need for foundational knowledge and practical application rather than extensive architectural experience. The mention of a "global mission critical messaging system" and TS/SCI clearance implies a high-security environment, possibly government contracting or defense.

📈 Primary Responsibilities

• Architect, build, and maintain scalable and responsive user interfaces using Angular and other modern front-end frameworks.

• Translate complex wireframes, prototypes, and mock-ups into functional, high-fidelity user interfaces.

• Implement and uphold a consistent design system across the application to ensure brand integrity and user familiarity.

• Conduct thorough testing of UI components and features, including unit, integration, and end-to-end testing, to ensure robustness and quality.

• Optimize application performance for maximum speed and scalability, addressing potential bottlenecks in front-end code.

• Collaborate closely with UX/UI designers, back-end developers, and product managers to deliver cohesive and effective user experiences.

• Participate actively in code reviews, providing constructive feedback to peers and ensuring adherence to coding standards and best practices.

• Maintain and improve existing codebases, refactoring where necessary to enhance maintainability, readability, and efficiency.

• Integrate front-end components with back-end services and APIs.

• Stay abreast of emerging front-end technologies and methodologies, recommending adoption where beneficial to the team and product.

📝 Enhancement Note: The responsibilities have been detailed to reflect the typical duties of a junior to mid-level front-end developer specializing in UI implementation within a professional software development lifecycle. Emphasis is placed on the practical application of skills in design, development, testing, and collaboration, aligning with the "junior/mid" experience level.

🎓 Skills & Qualifications

Education:

Experience:

• Demonstrated technical experience in software design, development, and implementation specifically targeting web browsers.

Required Skills:

• In-depth knowledge of the Angular framework: Proficiency in building complex user interfaces, managing component lifecycles, and utilizing Angular's core features.

• UI Development Expertise: Proven ability to translate prototypes, wireframes, or mock-ups into functional and visually accurate user interface screens.

• Modern Front-End Technologies: Familiarity with HTML5, CSS3, JavaScript/TypeScript, and responsive design principles.

• Source Code Control Systems: Experience with Git or similar version control systems, including branching, merging, and pull request workflows.

• Clean, Maintainable Code: Ability to write well-documented, readable, and efficient code that adheres to established standards.

• TS/SCI Clearance with Polygraph: Active and current Top Secret/Sensitive Compartmented Information (TS/SCI) clearance with a successfully completed polygraph examination is mandatory.

Preferred Skills:

• Web Accessibility Standards (WCAG): Knowledge of and experience implementing web accessibility best practices to ensure usability for all users.

• Large Software Team Support: Experience contributing to projects involving large, distributed software development teams.

• Jasmine Testing Framework: Familiarity with Jasmine for unit testing Angular components and services.

• UI/UX Design Principles: A solid understanding of user-centered design principles and best practices for intuitive navigation and user interaction.

• CI/CD Pipelines: Exposure to Continuous Integration/Continuous Deployment (CI/CD) concepts and tools.

📝 Enhancement Note: The required skills have been elaborated to specify the practical application and depth of knowledge expected for Angular and UI development. The mandatory TS/SCI clearance with polygraph has been highlighted as a critical requirement. Preferred skills have been expanded to include related front-end disciplines and team collaboration aspects.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstration of Angular Projects: Showcase at least one significant project built using Angular, highlighting complex UI components, state management, and integration with APIs.

• Wireframe/Mock-up to UI Conversion: Provide examples where you successfully translated design artifacts (wireframes, mock-ups) into functional web interfaces, illustrating your interpretation and implementation skills.

• Responsive Design Examples: Include projects that demonstrate adaptive or responsive design capabilities, showing how the UI behaves across different screen sizes and devices.

• Code Quality and Documentation: Be prepared to discuss your approach to writing clean, maintainable code and how you approach documentation within your projects. Access to a public repository (e.g., GitHub) with well-structured projects is highly recommended.

Process Documentation:

• Workflow Design: Be ready to discuss how you approach designing new UI features, from understanding requirements to final implementation, including your thought process for component breakdown and interaction flow.

• Testing Methodologies: Explain your approach to testing UI components and features, detailing the types of tests you perform (unit, integration, e2e) and the tools you utilize (e.g., Jasmine, Protractor if applicable).

• Design System Contribution: If applicable, describe your experience working with or contributing to design systems, including how you ensure consistency and manage component libraries.

📝 Enhancement Note: Portfolio requirements have been tailored to a UI Developer role, emphasizing practical application of Angular, translation of design assets, and code quality. The focus is on demonstrating tangible output and process understanding relevant to front-end development.

💵 Compensation & Benefits

Salary Range: Based on the location (Chantilly, Virginia), the junior/mid-level experience requirement, and the necessity of a TS/SCI clearance with polygraph, the estimated annual salary range for a UI Developer is between $80,000 and $120,000.

Benefits:

• Comprehensive Health Insurance: Medical, dental, and vision coverage.

• Retirement Savings Plan: 401(k) with potential company match.

• Paid Time Off: Generous vacation, sick leave, and paid holidays.

• Professional Development: Opportunities for training, certifications, and conference attendance.

• Life and Disability Insurance: Standard employer-provided coverage.

• Potential for Security Clearance Stipends: Some employers offer additional compensation or benefits for maintaining high-level security clearances.

Working Hours: Generally, a standard 40-hour work week is expected, likely aligned with Eastern Time Zone business hours (e.g., 9:00 AM - 5:00 PM EST). Flexibility may be offered, but the on-site nature implies adherence to a set office schedule.

📝 Enhancement Note: A salary range has been estimated based on industry benchmarks for UI Developers in the Chantilly, VA area, factoring in the junior to mid-level experience and the significant requirement of a TS/SCI clearance with polygraph, which typically commands a premium. Benefits have been listed as standard for a professional role, with a specific note on potential security clearance-related benefits.

🎯 Team & Company Context

🏢 Company Culture

Industry: Technology / Government Contracting / Defense. Closure Technologies operates within a sector that often supports critical national security or global mission objectives. This implies a strong emphasis on security, reliability, and precision.

Company Size: The description "team of high performing professionals" suggests a moderately sized team or department, likely within a larger organization. Without specific data, we infer it's established enough to support complex systems and global missions.

Founded: Information not provided.

Team Structure:

• The UI Developer will join a team focused on developing and maintaining a "global mission critical messaging system." This suggests a specialized team, likely composed of front-end developers, back-end developers, QA engineers, and potentially UX designers and product managers.

• The team likely operates with a structured hierarchy, common in government contracting environments, with clear reporting lines up to management and program leads.

Methodology:

• Given the "mission critical" nature, development methodologies likely emphasize robustness, security, and thorough testing. Agile methodologies (like Scrum or Kanban) might be adapted to incorporate stringent security protocols and compliance requirements.

• Data analysis will focus on system performance, user engagement metrics, and bug tracking to ensure the messaging system functions flawlessly.

• Workflow optimization will prioritize efficiency and reliability, especially in the context of a global system where downtime is unacceptable.

Company Website: https://www.closure-tech.com/

📝 Enhancement Note: The company context has been inferred based on the job description's mention of a "global mission critical messaging system" and the TS/SCI clearance requirement, strongly suggesting a role within the government contracting or defense technology sector. This influences the assumed culture, team structure, and methodologies.

📈 Career & Growth Analysis

Operations Career Level: This role is positioned as a Junior to Mid-Level UI Developer. It signifies an individual contributor role focused on executing front-end development tasks according to established guidelines and best practices. The scope involves developing and maintaining specific UI components and features, rather than architecting entire systems or leading teams.

Reporting Structure: The UI Developer will likely report to a Front-End Lead, Engineering Manager, or a Project Manager overseeing the messaging system. The team structure implies collaboration with peers and guidance from senior members.

Operations Impact: While not a traditional "Revenue Operations" role, this UI Developer has a significant impact on the usability and effectiveness of a "mission critical messaging system." High-quality UI directly influences user productivity, adoption, and the overall success of the system in achieving its critical objectives. Poor UI can lead to errors, frustration, and reduced operational efficiency.

Growth Opportunities:

• Technical Specialization: Deepen expertise in Angular, explore advanced front-end state management patterns, and gain proficiency in newer JavaScript frameworks or libraries.

• UX/UI Design Acumen: Develop a stronger understanding of UX principles, user research, and interaction design, potentially transitioning into a more dedicated UX/UI role.

• System Architecture: Progress to understanding back-end integration, API design, and front-end architectural patterns, preparing for roles like Senior Front-End Engineer or Front-End Architect.

• Team Leadership: With experience, move into roles like Tech Lead or Team Lead, guiding junior developers and overseeing specific feature development streams.

• Security Clearance Advancement: Maintain and potentially advance security clearance levels, opening doors to more sensitive and critical projects.

📝 Enhancement Note: The career and growth analysis focuses on the trajectory of a front-end developer within a technical team, emphasizing skill development, specialization, and potential leadership paths, particularly within a context that values security clearances.

🌐 Work Environment

Office Type: The role is explicitly "On-site," indicating a traditional office-based work environment. This suggests dedicated workspaces, shared team areas, and potentially meeting rooms for collaboration.

Office Location(s): Chantilly, Virginia. This location is part of the Northern Virginia technology corridor, known for its concentration of government contractors and IT companies, offering a dynamic professional ecosystem.

Workspace Context:

• Collaborative Environment: Expect a workspace designed to foster collaboration, with opportunities for spontaneous discussions with colleagues, designers, and other engineers.

• Tools and Technology: Access to standard development hardware (computers, monitors) and software licenses for development tools, IDEs, and collaboration platforms. Given the security requirements, the technology environment will likely be highly controlled and secure.

• Team Interaction: Regular team meetings, stand-ups, and code reviews will be integral to the daily workflow, facilitating knowledge sharing and problem-solving.

Work Schedule: A standard full-time schedule, likely Monday through Friday, with typical business hours (e.g., 9 AM to 5 PM EST). Overtime might be occasionally required to meet project deadlines, common in mission-critical development.

📝 Enhancement Note: The work environment description is grounded in the "On-site" requirement and the nature of the company (government contractor), emphasizing collaboration, controlled technology, and standard business hours.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A recruiter or HR representative will likely conduct an initial phone screen to assess basic qualifications, interest, and cultural fit.

• Technical Interview (Phone/Video): Expect a technical interview focusing on core front-end concepts, specifically Angular. This may involve theoretical questions, code snippet analysis, or live coding exercises.

• Portfolio Review & Technical Deep Dive: A more in-depth session with hiring managers or senior developers to review your portfolio. Be prepared to walk through your projects, explain your design choices, discuss challenges, and articulate your problem-solving approach. This is where your understanding of UI principles and Angular best practices will be thoroughly assessed.

• On-site/In-Person Interview: If applicable, this stage often involves meeting more team members, potentially a hiring manager, and may include a practical coding challenge or a system design discussion relevant to UI development for a critical system.

• Security Clearance Verification: The TS/SCI clearance with polygraph will be a primary focus, with the company verifying its validity and ensuring all pre-employment requirements are met.

Portfolio Review Tips:

• Curate Select Projects: Choose 2-3 of your strongest Angular projects that best showcase your UI development skills, problem-solving abilities, and understanding of the requirements.

• Storytelling Approach: For each project, be ready to explain: the problem it solved, your specific role and contributions, the technical challenges faced and how you overcame them, and the impact or outcome.

• Focus on Angular Implementation: Highlight your specific use of Angular features, component architecture, state management, and how you applied UX principles.

• Code Clarity: Ensure any code samples or repositories you share are clean, well-organized, and properly documented.

• Quantify Achievements: Where possible, use metrics to describe the impact of your work (e.g., "improved load times by X%", "reduced user error rate by Y%").

Challenge Preparation:

• Angular Fundamentals: Brush up on core Angular concepts: components, services, directives, pipes, routing, RxJS, state management (e.g., NgRx, Akita if experienced).

• UI/UX Principles: Review common UX patterns, usability heuristics, and principles of intuitive interface design.

• Problem-Solving Scenarios: Practice solving typical front-end development problems, focusing on breaking down complex UI requirements into manageable code.

• Security Awareness: Understand the implications of working in a secure environment and how it might affect development practices.

📝 Enhancement Note: The interview process and preparation tips are tailored to a UI Developer role, emphasizing portfolio demonstration, Angular proficiency, and the critical security clearance aspect.

🛠 Tools & Technology Stack

Primary Tools:

• Angular Framework: The core technology for UI development. Proficiency in Angular CLI, component-based architecture, and modern Angular versions is essential.

• TypeScript: Essential for modern Angular development, providing static typing for enhanced code quality and maintainability.

• HTML5 & CSS3: Foundational web technologies for structuring and styling user interfaces. Experience with preprocessors like Sass or Less may be beneficial.

• JavaScript (ES6+): Understanding of modern JavaScript features and paradigms.

Analytics & Reporting:

• Browser Developer Tools: Essential for debugging, performance profiling, and inspecting UI elements.

• Potential for Analytics Libraries: Depending on the system's needs, familiarity with client-side analytics tools (e.g., Google Analytics, custom event tracking) could be relevant.

CRM & Automation:

• Source Code Management: Git is a standard. Platforms like GitHub, GitLab, or Bitbucket are commonly used for version control and collaboration.

• Build Tools: Understanding of build processes managed by Angular CLI, potentially including Webpack or other module bundlers.

• Testing Frameworks: Jasmine is explicitly mentioned as desired. Experience with Karma (for running Jasmine tests in browsers) or Protractor (for end-to-end testing in Angular) would be a plus.

📝 Enhancement Note: The technology stack focuses on the core tools and frameworks expected for an Angular UI Developer, with specific mention of Git and Jasmine as indicated in the job description. The environment's secure nature implies that specific internal tools or approved software lists will be provided.

👥 Team Culture & Values

Operations Values:

• Security First: Given the TS/SCI clearance requirement and the nature of a "mission critical messaging system," security consciousness and adherence to protocols will be paramount. This translates to careful coding practices, data handling, and awareness of system vulnerabilities.

• Quality & Reliability: The "mission critical" aspect demands a strong commitment to delivering high-quality, reliable software. This means meticulous development, rigorous testing, and a focus on bug prevention.

• Collaboration & Teamwork: Supporting a global system likely involves a distributed team, making effective communication and collaboration essential for synchronized development and problem-solving.

• Professionalism & Accountability: High-stakes projects require a professional attitude, taking ownership of tasks, and being accountable for deliverables.

Collaboration Style:

• Structured Communication: Expect structured communication channels, likely involving daily stand-ups, sprint reviews, and formal documentation for critical decisions, especially given the security context.

• Peer Review Culture: A strong culture of code reviews to ensure quality, share knowledge, and maintain consistency across the codebase.

• Cross-Functional Integration: Active collaboration with back-end developers, QA engineers, and potentially UX designers to ensure seamless integration of front-end components with the overall system architecture.

📝 Enhancement Note: The team culture and values are inferred based on the critical nature of the system and the security clearance requirements, highlighting security, quality, and structured collaboration.

⚡ Challenges & Growth Opportunities

Challenges:

• Maintaining High Security Standards: Adapting to and consistently adhering to stringent security protocols and compliance requirements in a sensitive environment.

• Complex System Integration: Integrating UI components with a potentially intricate and legacy mission-critical back-end system, requiring careful API management and data handling.

• Balancing Modernization with Stability: Implementing modern Angular practices and UI enhancements while ensuring the stability and reliability of a mission-critical system where change can be slow and deliberate.

• Global System Support: Understanding and addressing the needs and potential variations for a globally deployed messaging system.

Learning & Development Opportunities:

• Advanced Angular Techniques: Opportunities to master advanced Angular features, state management patterns (e.g., NgRx), and performance optimization strategies.

• Secure Development Practices: Gaining hands-on experience with secure coding practices and understanding the nuances of developing for high-security environments.

• Front-End Architecture: Exposure to larger system design discussions, helping to understand how front-end architecture fits into the broader system landscape.

• Industry-Specific Knowledge: Developing an understanding of the operational domain of the messaging system, which can be valuable for future roles in specialized technology sectors.

📝 Enhancement Note: Challenges and growth opportunities are framed within the context of developing for a mission-critical, high-security system using Angular.

💡 Interview Preparation

Strategy Questions:

• Angular Architecture: "Describe how you would structure an Angular application for a large-scale, mission-critical messaging system. What are your considerations for component architecture, state management, and lazy loading?" (Focus on scalability, maintainability, and performance).

• UI/UX Implementation: "Given a complex wireframe for a new feature, how would you approach translating it into an Angular UI? Walk me through your process from requirements to implementation, including how you'd ensure a good user experience." (Highlight your methodical approach and UX awareness).

• Problem-Solving & Debugging: "Describe a challenging UI bug you encountered. How did you diagnose it, what steps did you take to resolve it, and what did you learn from the experience?" (Demonstrate your analytical skills and resilience).

Company & Culture Questions:

• "What interests you about working on a mission-critical messaging system, and how do you see your UI development skills contributing to its success?" (Connect your skills to the company's mission).

• "How do you approach collaborating with back-end developers and designers to ensure a cohesive product?" (Showcase your teamwork and communication skills).

Portfolio Presentation Strategy:

• Project Deep Dive: For each discussed project, be ready to share code snippets (if possible and allowed), explain your design patterns, and discuss trade-offs made during development.

• Focus on Angular Implementation: Emphasize specific Angular features used, how you managed component communication, and any performance optimizations implemented.

• Demonstrate Problem-Solving: Use your portfolio projects as examples to illustrate how you tackle technical challenges and deliver effective solutions.

• Quantify Impact: If possible, present metrics or outcomes that demonstrate the value of your work (e.g., improved user flow, enhanced performance).

📝 Enhancement Note: Interview preparation advice is tailored to the specific role requirements, focusing on Angular, UI/UX, problem-solving, and the critical security clearance aspect.

📌 Application Steps

To apply for this operations position:

• Submit your application through the application link provided on the Closure Technologies careers page.

• Tailor Your Resume: Highlight your experience with Angular, UI development, front-end technologies, and any experience with mission-critical systems or secure environments. Explicitly mention your TS/SCI clearance with polygraph.

• Prepare Your Portfolio: Select 2-3 strong Angular projects that showcase your UI development skills. Ensure code is clean and well-documented, and be ready to present your work and discuss your process.

• Research Closure Technologies: Understand the company's mission, industry, and any publicly available information about their work to demonstrate genuine interest. Pay attention to their focus on technology and security.

• Practice Interview Questions: Prepare for technical questions on Angular and UI development, as well as behavioral questions related to teamwork, problem-solving, and working in a secure environment.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details, particularly regarding salary, benefits, and specific company culture, should be verified directly with the hiring organization before making application decisions. The mandatory TS/SCI clearance with polygraph is a critical requirement and should be confirmed as current and valid.