Senior Full Stack UI Engineer

Quantum US; Centennial (CO); On-site; USD 120,000 - 150,000; Full time

Job summary

Quantum US in Centennial, CO is seeking a seasoned Full-Stack Front-End & Design System leader to design, architect, and build modern web applications using React, Vue, and TypeScript. You will own production services, guide architecture decisions, and drive UI component libraries in collaboration with UX and product teams.

Responsibilities include leading code reviews, mentoring engineers, implementing CI/CD discipline, and ensuring performance, security, observability, and maintainability

Qualifications

• 8+ years of full-stack web app experience with ownership of production services.
• REST and GraphQL API design and implementation.
• Relational DBs (PostgreSQL, MySQL) and Prometheus time-series DBs.
• Cloud, containers, and orchestration experience.
• UX collaboration with design tools like Figma.
• Git and CI/CD with automated testing.

Responsibilities

• Translate UX designs into reusable UI components and APIs.
• Lead code reviews and establish engineering standards across front-end and back-end.
• Mentor junior and mid-level engineers and raise the quality bar.
• Ensure performance, security, and observability across systems.
• Own reliability and incident response, with strong debugging across layers.

Skills

Full-stack development

Code reviews

Mentoring

UX collaboration

Performance & security

Education

Bachelor’s degree in Computer Science or related field

Tools

Git

GitLab CI/CD

Job description

• Design, architect, and develop modern web applications using React , TypeScript , and Vue .
• Build andmaintain Backend-for-Frontend (BFF) and API services ( REST and/or GraphQL ) that aggregate, adapt, andoptimizeback-end data for UI consumption.
• Translate UI/UX requirements into efficient back-end data models, API contracts, and service boundaries.
• Define and evolve front-end and BFF architectures with a focus on performance, scalability, security, and maintainability.

Front-End & Design System Collaboration

• Collaborate with UX and product teams to translate Figma designs into high-quality, reusable UI components aligned with shared design systems andcomponentlibraries.
• Contribute to and consume sharedcomponentlibraries across React and Vue ecosystems.

Cloud Infrastructure & Reliability

• Architect andmaintainback-end infrastructure in AWS (EC2, RDS, SQS, SES, ECR) and containerized environments ( Docker, Kubernetes ).
• Own and improve API performance through caching strategies, query optimization, and efficient data transformation.
• Respond to production incidentsin a timely mannerand contribute to observability, monitoring ( Prometheus/Grafana ), and reliability initiatives.

Back-End Security

• Integrate authentication and authorization using identity platforms such as Keycloak , including SSO and role-based access control.
• Build secure, maintainable server-side functionality and contribute to security tooling across UI and back-end layers.

Data Management

• Design, evolve, andoptimizerelational database schemas ( PostgreSQL, MySQL ) and caching layers ( Redis ) in support of UI-centric use cases.
• Ensure data consistency, integrity, and performance across services.

Technical Leadership

• Lead code reviews,establishbest practices, and ensure consistent engineering standards acrossfront-endand back-end layers.
• Mentor junior and mid-level engineers and contribute to raising the overall quality bar of the team.
• Participate actively in design reviews, sprint planning, and cross-team technical discussions.

Quality & Testing

• Proactivelyidentifytechnical debt and leadrefactoringor modernization efforts.
• Champion high code quality through thoughtful design, automated unit/integration/e2e testing, and CI/CD pipeline discipline.

Qualifications

Required

• Experience: 8+ years of professional experience building full-stack, user-facing web applications, including ownership of production services.
• Back-End & APIs: Experience designing and implementing UI-focused back-end services (Node.js, Python, PHP, or similar) using REST and/orGraphQL.
• Databases: Strong experience with relational (PostgreSQL, MySQL)and time series databases (Prometheus).
• Cloud & DevOps: Experience working in cloud environments with containerization and orchestration.
• UX Collaboration: Experience working closely with UX teams and implementing designs from Figma or similar design tools.
• Tooling & Testing: Solid experience with Git, GitLab CI/CD, and modern automated testing frameworks.
• Debugging: Strong debugging and troubleshooting skills across front-end, API, and data layers.
• Ability to work effectively in a collaborative, in-office engineering environment.

Preferred

• Experience with the Laravel framework in PHP.
• Familiarity with identity/auth platforms and API securitypatterns.
• Background instorage, infrastructure, or data-intensive/enterprise-scale systems.

Education

• Bachelor’s degree in Computer Science, Computer Engineering, or a related field (or equivalent practical experience).

Soft Skills

• Strong technical leadership andproblem ‑ solvingskills.
• Clear and effective communication with both technical andnon ‑ technicalstakeholders.
• High attention to detail and a strong commitment to code quality.
• Ability to influence technical direction and inspire best practices across the team.
• Comfortable balancinghands ‑ ondevelopment with mentorship and technical leadership.

Equal Opportunity Employer/Protected Veterans/Individuals with Disabilities
This employer is required to notify all applicants of their rights pursuant to federal employment laws.For further information, please review the Know Your Rights notice from the Department of Labor.