Senior Full Stack UI Engineer

📍 Job Overview

Job Title: Senior Full Stack UI Engineer

Company: LT ZERO Asia Pacific

Location: Centennial, Colorado, USA

Job Type: FULL_TIME

Category: Software Engineering / Full Stack Development

Date Posted: 2026-09-08

Experience Level: 8+ Years Professional Experience (Senior Level)

Remote Status: On-site

🚀 Role Summary

• Spearhead the design, architecture, and development of modern, user-facing web applications leveraging a full-stack approach.

• Build and maintain robust Backend-for-Frontend (BFF) services and APIs (REST/GraphQL) to efficiently aggregate and adapt back-end data for seamless UI consumption.

• Drive UI performance optimization, accessibility standards, and cross-browser compatibility, ensuring a high-quality user experience.

• Architect and manage back-end infrastructure within cloud environments (AWS, Docker, Kubernetes), focusing on scalability, security, and reliability.

• Provide technical leadership, mentor engineering talent, and champion best practices to elevate the team's overall engineering standards.

📝 Enhancement Note: This role is distinctly Senior, requiring significant ownership and leadership in both front-end and back-end development, with a strong emphasis on system architecture and cloud infrastructure. The "UI Engineer" title, combined with "Full Stack" responsibilities, indicates a focus on the end-to-end development of user-centric applications, bridging the gap between user interface and underlying services.

📈 Primary Responsibilities

• Design, architect, and develop modern web applications using React, TypeScript, and Vue, ensuring scalability and maintainability.

• Construct and maintain Backend-for-Frontend (BFF) services and API layers (REST and/or GraphQL) to optimize data flow for UI consumption.

• Translate UI/UX designs and requirements into efficient back-end data models, API contracts, and well-defined service boundaries.

• Define and evolve front-end and BFF architectures with a strategic focus on performance, scalability, security, and long-term maintainability.

• Collaborate closely with UX and product teams to translate Figma designs into high-quality, reusable UI components that align with shared design systems and component libraries.

• Drive UI performance optimization initiatives, ensuring high accessibility standards and robust cross-browser compatibility.

• Contribute to and consume shared component libraries across React and Vue ecosystems, fostering consistency and reusability.

• Architect, maintain, and optimize back-end infrastructure using AWS services (EC2, RDS, SQS, SES, ECR) and containerized environments (Docker, Kubernetes).

• Enhance API performance through strategic caching, query optimization, and efficient data transformation techniques.

• Respond to production incidents promptly, contributing to observability, monitoring (Prometheus/Grafana), and overall system reliability.

• Integrate authentication and authorization mechanisms using identity platforms like Keycloak, implementing SSO and role-based access control.

• Develop secure, maintainable server-side functionality and contribute to security tooling across both UI and back-end layers.

• Design, evolve, and optimize relational database schemas (PostgreSQL, MySQL) and caching layers (Redis) to support UI-centric use cases.

• Ensure data consistency, integrity, and peak performance across all services and data layers.

• Lead code reviews, establish engineering best practices, and enforce consistent development standards across front-end and back-end codebases.

• Mentor junior and mid-level engineers, fostering their growth and elevating the team's collective technical expertise.

• Actively participate in design reviews, sprint planning sessions, and cross-team technical discussions to drive strategic alignment.

• Proactively identify and address technical debt through refactoring and modernization efforts.

• Champion high code quality through meticulous design, comprehensive automated testing (unit, integration, E2E), and disciplined CI/CD pipeline management.

📝 Enhancement Note: The responsibilities highlight a hybrid role with significant architectural and leadership expectations. The emphasis on "UI-focused back-end services" and "Backend-for-Frontend (BFF)" suggests a strategic approach to service design that prioritizes the needs of the user interface, a common pattern in modern GTM and product development operations.

🎓 Skills & Qualifications

Education: Bachelor’s degree in Computer Science, Computer Engineering, or a related technical field; equivalent practical experience will also be considered.

Experience: 8+ years of professional experience in building full-stack, user-facing web applications, with a proven track record of owning production services from development through deployment and maintenance.

Required Skills:

• Front-End Expertise: Strong hands-on experience with React in production environments; advanced proficiency in JavaScript, TypeScript, HTML5, and CSS3.

• Back-End & API Development: Experience designing and implementing UI-focused back-end services using Node.js, Python, PHP, or similar languages, with proficiency in REST and/or GraphQL.

• Database Management: Strong experience with relational databases (PostgreSQL, MySQL) and time-series databases (Prometheus).

• Cloud & DevOps: Experience working with cloud environments, containerization (Docker), and orchestration (Kubernetes).

• UX Collaboration: Proven ability to work closely with UX teams and translate designs from tools like Figma into functional, high-quality UI components.

• Accessibility & Responsiveness: Strong understanding of responsive design principles, web accessibility standards (WCAG), and ensuring cross-browser compatibility.

• Development Tooling: Solid experience with version control systems (Git) and CI/CD pipelines (GitLab CI/CD mentioned).

• Testing & Debugging: Experience with modern automated testing frameworks (unit, integration, E2E) and strong debugging/troubleshooting skills across all application layers.

• Collaboration: Ability to work effectively in a collaborative, in-office engineering environment.

Preferred Skills:

• Experience with the Laravel framework in PHP.

• Familiarity with identity and authentication platforms (e.g., Keycloak) and common API security patterns.

• Background in storage, infrastructure, or data-intensive/enterprise-scale systems.

• Experience with Vue.js is a plus, given its mention in the responsibilities.

📝 Enhancement Note: The "8+ years" requirement for a Senior Full Stack UI Engineer, coupled with the breadth of responsibilities covering architecture, development, cloud infrastructure, and mentorship, positions this as a lead-level role. The emphasis on "UI-focused back-end services" and "BFF" is a key differentiator, suggesting a need for engineers who can strategically design APIs to serve front-end needs efficiently.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstrations of full-stack application development, showcasing both front-end UI implementation and back-end service logic.

• Examples of API design and implementation (REST or GraphQL), highlighting how data was adapted and optimized for UI consumption.

• Projects illustrating experience with modern front-end frameworks (React strongly preferred, Vue a plus) and state management.

• Contributions to or examples of reusable component libraries or design system implementations.

• Evidence of cloud infrastructure management (AWS, Docker, Kubernetes) and CI/CD pipeline setup.

• Examples of database schema design and optimization for performance.

• Contributions to projects emphasizing accessibility, performance optimization, and security. Process Documentation:

• Showcase understanding of architectural design patterns for scalable web applications.

• Examples of unit, integration, and end-to-end testing strategies implemented in projects.

• Documentation or descriptions of how technical debt was managed or refactoring efforts were undertaken.

• Demonstrations of collaborative development workflows, including code reviews and CI/CD practices.

• Case studies or descriptions of how production incidents were handled and system reliability was improved.

📝 Enhancement Note: For a Senior Full Stack UI Engineer, a portfolio should not just showcase finished products but also the engineering thought process. This includes architectural decisions, trade-offs made, challenges overcome in performance, security, and scalability, and how collaboration with design/product teams was managed. Demonstrating ownership of production services is crucial.

💵 Compensation & Benefits

Salary Range:

Based on industry benchmarks for Senior Full Stack Engineers in Centennial, Colorado, with 8+ years of experience, the estimated salary range is $140,000 - $190,000 per year. This estimate accounts for the senior level, the technical breadth required (front-end, back-end, cloud, APIs), and the on-site work arrangement in a high-cost-of-living area like Denver metro.

Benefits:

• Comprehensive health, dental, and vision insurance plans.

• Retirement savings plan with company match (e.g., 401(k)).

• Paid time off (PTO), including vacation, sick leave, and holidays.

• Opportunities for professional development, training, and conference attendance.

• Potential for performance-based bonuses or stock options.

• Employee assistance programs and wellness initiatives.

Working Hours: The standard working hours are expected to be 40 hours per week, typical for a full-time role. While the role is on-site, there may be flexibility in daily start/end times, subject to team coordination and business needs.

📝 Enhancement Note: The salary range is an estimate based on common compensation practices for senior-level software engineers in the US tech market, specifically within a major metropolitan area like Denver. The "LT ZERO Asia Pacific" company name might suggest a global organization, but the role is specified in Centennial, CO, so US-based compensation data is most relevant.

🎯 Team & Company Context

🏢 Company Culture

Industry: The company name "LT ZERO Asia Pacific" and the domain "ltzero.com" do not immediately reveal the specific industry. However, the technical stack (React, Vue, Node.js, AWS, Kubernetes) suggests a technology-driven company, likely involved in software development, SaaS, or digital services. Given the nature of the role, it could be a FinTech, E-commerce, SaaS platform, or a company with a significant digital product offering.

Company Size: Information on company size is not provided. However, the need for a Senior Engineer with leadership and mentorship capabilities suggests a growing team or a mid-to-large sized organization where structured engineering practices and talent development are valued. A company size of 50-1000 employees would typically require such roles.

Founded: The founding date is not provided.

Team Structure:

• The role implies being part of a software engineering team, likely with a focus on product development.

• The presence of "junior and mid-level engineers" to mentor suggests a team structure that includes various experience levels.

• Reporting likely to an Engineering Manager or Lead Architect, with close collaboration with Product Managers and UX Designers.

• The emphasis on cross-team technical discussions indicates a collaborative environment where different engineering disciplines (front-end, back-end, DevOps) interact. Methodology:

• Agile development methodologies (e.g., Scrum or Kanban) are highly probable, given the mention of sprint planning.

• A strong focus on DevOps principles, CI/CD, and automated testing for efficient and reliable software delivery.

• Data-driven decision-making, with emphasis on performance monitoring, observability, and metrics.

• Collaborative design processes involving UX, Product, and Engineering.

Company Website: ltzero.com (Note: This domain was not provided in the input but inferred from the organization name. It should be verified.)

📝 Enhancement Note: The company's specific industry and market position are unknown. However, the technical requirements point towards a modern software development environment. For applicants, researching the company's mission, products, and recent news is critical to understanding its context and aligning their application.

📈 Career & Growth Analysis

Operations Career Level: This role is a Senior Individual Contributor (IC) with significant technical leadership responsibilities. It sits at the top of the individual contributor track for engineers, often serving as a stepping stone to Staff Engineer or Principal Engineer roles, or potentially management if desired. The role demands deep technical expertise, architectural vision, and the ability to mentor and influence others.

Reporting Structure: The Senior Full Stack UI Engineer will likely report to an Engineering Manager or a Director of Engineering. They will work closely with Product Managers, UX Designers, and other engineers (junior, mid-level, and potentially other senior/staff engineers).

Operations Impact: This role directly impacts product development velocity, quality, and user experience. By building robust, scalable, and performant applications and services, the engineer contributes to customer satisfaction, operational efficiency, and the overall success of the company's digital products. Their work on infrastructure and reliability directly supports business continuity and service availability.

Growth Opportunities:

• Technical Specialization: Deepen expertise in specific areas such as cloud architecture (AWS, Kubernetes), API design (GraphQL), or front-end performance optimization.

• Technical Leadership: Progress to Staff or Principal Engineer roles, taking on broader architectural responsibilities and driving technical strategy across multiple teams or the entire organization.

• Mentorship & Team Development: Grow into a formal technical lead or engineering management role by honing mentoring skills and contributing to team growth and process improvement.

• Cross-Functional Exposure: Gain deeper understanding of product management, UX design, and business strategy through close collaboration.

• Industry Trends: Stay at the forefront of emerging technologies and best practices in full-stack development, cloud computing, and UI/UX engineering.

📝 Enhancement Note: The "Senior" title and the explicit mention of "mentorship" and "technical leadership" indicate a clear path for growth within the engineering track. Applicants should highlight their experience in guiding technical direction and developing other engineers.

🌐 Work Environment

Office Type: The job explicitly states an "in-office engineering environment" and requires the ability to "work effectively in a collaborative, in-office engineering environment." This indicates a traditional office setting rather than a remote or hybrid arrangement.

Office Location(s): Centennial, Colorado, USA. This is a suburb of Denver, known for its tech scene and accessibility.

Workspace Context:

• Collaborative Environment: Expect an open or semi-open office layout designed to facilitate team interaction, brainstorming, and spontaneous problem-solving.

• Tools & Technology: Access to modern development hardware, software licenses, and potentially dedicated collaboration spaces with whiteboards and AV equipment.

• Team Interaction: Frequent opportunities for direct interaction with immediate team members, UX designers, product managers, and potentially other engineering teams. The on-site nature facilitates in-person design reviews, pair programming, and team meetings.

Work Schedule: The role is full-time, with 40 hours per week being standard. While specific daily hours might offer some flexibility, the on-site requirement means consistent presence at the office is expected. This environment is conducive to structured work, team synchronization, and immediate access to colleagues for support.

📝 Enhancement Note: The emphasis on an "in-office" environment is critical. Candidates must be willing and able to commute to Centennial, CO, and thrive in a setting where in-person collaboration is the primary mode of interaction. This contrasts with remote roles and implies a preference for synchronous communication and team synergy.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A recruiter or hiring manager will likely conduct an initial phone screen to assess basic qualifications, experience, and cultural fit.

• Technical Phone/Video Interview: Expect one or more interviews focusing on technical skills.

This may involve coding challenges, architectural design discussions, or in-depth questions about past projects and technologies.

• On-site/Virtual On-site Interviews: This will likely involve a series of interviews with different team members, including senior engineers, potential peers, and engineering leadership. Expect:

  • Coding Assessments: Live coding exercises or take-home assignments focusing on front-end, back-end, or full-stack problem-solving.
  • System Design/Architecture: Discussions and whiteboard sessions to evaluate your ability to design scalable, reliable, and maintainable systems.
  • Behavioral Questions: Questions designed to assess leadership, mentorship, collaboration, problem-solving approach, and cultural alignment.
  • Portfolio Review: A dedicated session to walk through selected projects from your portfolio, explaining your contributions, technical decisions, and outcomes.

• Final Interview: Potentially an interview with a senior leader (e.g., VP of Engineering) to finalize the decision.

Portfolio Review Tips:

• Curate Strategically: Select 2-3 projects that best showcase your full-stack capabilities, architectural thinking, and leadership experience. Prioritize projects demonstrating React, BFF development, API design, and cloud infrastructure.

• Highlight Ownership & Impact: For each project, clearly articulate your specific role, the challenges you faced, the technical solutions you implemented, and the quantifiable impact or outcomes achieved.

• Explain Architectural Decisions: Be prepared to discuss why certain technologies or architectural patterns were chosen, the trade-offs considered, and any lessons learned.

• Demonstrate Collaboration: If possible, show examples of how you collaborated with UX/Product teams or mentored other engineers.

• Code Quality & Testing: If your code is public (e.g., GitHub), ensure it is well-documented, clean, and includes tests. Be ready to discuss your testing philosophy.

Challenge Preparation:

• Coding Proficiency: Practice coding problems on platforms like LeetCode or HackerRank, focusing on data structures, algorithms, and common JavaScript/TypeScript patterns.

• System Design: Study common system design interview topics (e.g., designing a URL shortener, a social media feed, a rate limiter) and how to apply them to full-stack architectures, BFF patterns, and cloud services.

• Behavioral Responses: Prepare STAR method (Situation, Task, Action, Result) responses for common behavioral questions related to leadership, teamwork, conflict resolution, and problem-solving.

• Technology Deep Dive: Brush up on the core technologies listed (React, TypeScript, Node.js, GraphQL, AWS, Docker, Kubernetes, PostgreSQL, Redis) and be ready to discuss them in detail.

📝 Enhancement Note: For a Senior role, the interview process will heavily scrutinize architectural thinking, leadership potential, and the ability to mentor. The portfolio review is a critical component, serving as a tangible demonstration of skills and experience.

🛠 Tools & Technology Stack

Primary Tools:

• Front-End Frameworks: React (primary), Vue (secondary/collaborative).

• Languages: TypeScript (primary), JavaScript, HTML5, CSS3.

• Back-End Services: Node.js, Python, PHP (experience with at least one required).

• API Technologies: REST, GraphQL.

• Cloud Platform: AWS (EC2, RDS, SQS, SES, ECR).

• Containerization & Orchestration: Docker, Kubernetes.

• Databases: PostgreSQL, MySQL (relational); Prometheus (time-series).

• Caching: Redis.

• Identity Management: Keycloak (familiarity preferred).

• Monitoring & Observability: Prometheus, Grafana.

• Version Control: Git.

• CI/CD: GitLab CI/CD.

• Design Tools: Figma.

Analytics & Reporting: While not explicitly listed as a primary responsibility for this UI-focused role, understanding how application performance metrics are tracked and reported (e.g., via Prometheus/Grafana) is essential.

CRM & Automation: No CRM or specific automation tools are mentioned as core to this role, suggesting it's a pure engineering position rather than one directly involved with sales or marketing operations tools.

📝 Enhancement Note: This is a comprehensive modern tech stack. Candidates should be prepared to discuss their experience with each of these technologies, particularly how they integrate and interact within a full-stack architecture. The emphasis on "UI-focused back-end services" means understanding how these services serve the front-end is key.

👥 Team Culture & Values

Operations Values:

• Technical Excellence: A strong commitment to high-quality code, robust architecture, and efficient system design.

• Collaboration: Emphasis on teamwork, open communication, and shared ownership across disciplines.

• Continuous Improvement: A drive to identify and address technical debt, optimize processes, and adopt best practices.

• Mentorship & Growth: A culture that values sharing knowledge, developing talent, and fostering career progression for all team members.

• User-Centricity: A focus on building products and services that deliver excellent user experiences, with attention to performance and accessibility.

• Reliability & Security: A commitment to building and maintaining stable, secure, and performant systems.

Collaboration Style:

• Cross-Functional Integration: Close working relationships with UX designers and Product Managers are expected, with active participation in design and planning phases.

• Peer Review Culture: Code reviews are a standard practice, fostering knowledge sharing and quality assurance.

• Open Communication: Encouragement of direct and transparent communication, both within the immediate engineering team and with stakeholders.

• Agile Practices: A collaborative approach to sprint planning, daily stand-ups, and retrospectives to ensure alignment and continuous adaptation.

📝 Enhancement Note: The culture appears to be one of a mature, growth-oriented engineering team that values both individual technical contribution and collective team success. The "in-office" requirement reinforces the emphasis on in-person collaboration.

⚡ Challenges & Growth Opportunities

Challenges:

• Balancing Front-End and Back-End: Effectively managing responsibilities across both UI and API/infrastructure layers requires strong time management and context-switching skills.

• Scaling Systems: Ensuring the architecture can handle increasing user loads and data volumes while maintaining performance and reliability.

• Technical Debt Management: Proactively identifying, prioritizing, and addressing technical debt without hindering new feature development.

• Mentorship Responsibilities: Balancing hands-on coding with the demands of mentoring junior engineers and elevating team standards.

• Cross-Team Alignment: Ensuring consistency and effective integration with other engineering teams or services.

• Keeping Pace with Technology: Continuously learning and adapting to new tools, frameworks, and best practices in a rapidly evolving tech landscape.

Learning & Development Opportunities:

• Advanced Cloud Architecture: Deepen expertise in AWS services, Kubernetes, and infrastructure-as-code principles.

• API Design & GraphQL: Become a specialist in designing efficient and scalable APIs, particularly with GraphQL.

• Front-End Performance & Accessibility: Lead initiatives to optimize application speed, responsiveness, and inclusivity.

• Technical Leadership Track: Develop skills in architectural decision-making, strategic planning, and influencing technical direction.

• Mentorship Programs: Formal or informal opportunities to mentor and be mentored, fostering leadership and technical growth.

• Industry Conferences & Certifications: Potential for company sponsorship to attend relevant tech conferences or pursue certifications.

📝 Enhancement Note: This role presents significant challenges that are also opportunities for growth. The senior nature of the position means candidates should be adept at navigating complexity and driving solutions, rather than just executing tasks.

💡 Interview Preparation

Strategy Questions:

• Architecture & Design: "Describe a complex full-stack system you've architected. What were the key challenges, and how did you address them? How would you design a scalable BFF for a high-traffic e-commerce platform?"

• Problem Solving & Debugging: "Walk me through how you would debug a performance issue affecting a React application that is interacting with a GraphQL API. What tools and techniques would you use across the stack?"

• Leadership & Mentorship: "How do you approach mentoring junior engineers? Describe a time you had to influence technical direction on a team, and what was the outcome?"

• Technology Specifics: "When would you choose GraphQL over REST for a BFF? What are the trade-offs of using Kubernetes for managing microservices?"

Company & Culture Questions:

• "What interests you about LT ZERO Asia Pacific and this specific role?"

• "How do you stay updated with the latest trends in full-stack development and cloud technologies?"

• "Describe your ideal team environment and how you contribute to a positive engineering culture."

• "How do you prioritize tasks when working on multiple projects or features simultaneously?" Portfolio Presentation Strategy:

• Structure: For each project, start with the business problem or user need, then detail your specific contributions, the technical stack and architecture, key challenges and solutions, and finally, the measurable impact or outcome.

• Quantify: Use metrics whenever possible to demonstrate the impact of your work (e.g., "improved page load time by 30%", "reduced API latency by 50%", "increased test coverage from 70% to 95%").

• Visual Aids: Use diagrams (architecture, flowcharts) to explain complex systems. If possible, show live demos or screenshots.

• Narrative: Tell a story about your project, highlighting your problem-solving skills, technical acumen, and leadership.

• Q&A Readiness: Anticipate questions about your technology choices, trade-offs, and any challenges encountered.

📝 Enhancement Note: Prepare specific examples for each question type, linking them back to the technologies and responsibilities listed in the job description. For system design, focus on the "UI-focused back-end services" and "BFF" aspects.

📌 Application Steps

To apply for this Senior Full Stack UI Engineer position:

• Submit your application through the provided link on the Ultipro recruiting portal.

• Tailor Your Resume: Highlight your 8+ years of experience, focusing on full-stack development, React, TypeScript, API design (REST/GraphQL), cloud platforms (AWS, Docker, Kubernetes), and any leadership or mentorship roles. Quantify achievements wherever possible.

• Prepare Your Portfolio: Select 2-3 key projects that best demonstrate your full-stack capabilities, architectural thinking, and experience with the required technologies. Be ready to walk through them, explaining your contributions and impact.

• Research LT ZERO Asia Pacific: Understand their business, products, and any publicly available information about their engineering culture to tailor your application and interview responses.

• Practice Interview Questions: Prepare answers for technical, behavioral, and system design questions, focusing on the specific requirements of this role and the technologies listed.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.