Senior Full Stack UI Engineer

Quantum Default Brand•Centennial, CO

1d•Onsite

About The Position

This role involves designing, architecting, and developing modern web applications using React, TypeScript, and Vue. The engineer will build and maintain Backend-for-Frontend (BFF) and API services (REST and/or GraphQL) that aggregate, adapt, and optimize back-end data for UI consumption. A key aspect of the role is translating UI/UX requirements into efficient back-end data models, API contracts, and service boundaries. The engineer will also define and evolve front-end and BFF architectures with a focus on performance, scalability, security, and maintainability. Collaboration with UX and product teams to translate Figma designs into high-quality, reusable UI components aligned with shared design systems and component libraries is essential. The role also includes driving UI performance optimization, accessibility, and cross-browser compatibility, as well as contributing to and consuming shared component libraries across React and Vue ecosystems. Additionally, the engineer will architect and maintain back-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, and respond to production incidents. Security integration using identity platforms like Keycloak, including SSO and role-based access control, is also a responsibility. The role involves designing, evolving, and optimizing relational database schemas (PostgreSQL, MySQL) and caching layers (Redis), ensuring data consistency, integrity, and performance. Technical leadership, including code reviews, establishing best practices, mentoring junior engineers, and participating in design reviews and sprint planning, is expected. Championing high code quality through design, automated testing, and CI/CD discipline is also a key part of the role.

Requirements

8+ years of professional experience building full-stack, user-facing web applications, including ownership of production services.
Strong hands-on experience with React in production environments; advanced proficiency in JavaScript, TypeScript, HTML5, and CSS3.
Experience designing and implementing UI-focused back-end services (Node.js, Python, PHP, or similar) using REST and/or GraphQL.
Strong experience with relational (PostgreSQL, MySQL) and time series databases (Prometheus).
Experience working in cloud environments with containerization and orchestration.
Experience working closely with UX teams and implementing designs from Figma or similar design tools.
Strong understanding of responsive design, accessibility standards, and browser compatibility.
Solid experience with Git, GitLab CI/CD, and modern automated testing frameworks.
Strong debugging and troubleshooting skills across front-end, API, and data layers.
Ability to work effectively in a collaborative, in-office engineering environment.

Nice To Haves

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

Responsibilities

Design, architect, and develop modern web applications using React, TypeScript, and Vue.
Build and maintain Backend-for-Frontend (BFF) and API services (REST and/or GraphQL) that aggregate, adapt, and optimize back-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.
Collaborate with UX and product teams to translate Figma designs into high-quality, reusable UI components aligned with shared design systems and component libraries.
Drive UI performance optimization, accessibility, and cross-browser compatibility.
Contribute to and consume shared component libraries across React and Vue ecosystems.
Architect and maintain back-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 incidents in a timely manner and contribute to observability, monitoring (Prometheus/Grafana), and reliability initiatives.
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.
Design, evolve, and optimize relational database schemas (PostgreSQL, MySQL) and caching layers (Redis) in support of UI-centric use cases.
Ensure data consistency, integrity, and performance across services.
Lead code reviews, establish best practices, and ensure consistent engineering standards across front-end and 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.
Proactively identify technical debt and lead refactoring or modernization efforts.
Champion high code quality through thoughtful design, automated unit/integration/e2e testing, and CI/CD pipeline discipline.