Sr. UI Engineer Job at Cadent, Philadelphia, PA

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  • Cadent
  • Philadelphia, PA

Job Description

Cadent ignites seamless connections between brands, publishers & consumers. Our predictive AI orchestrates outcomes on any platform customers are on, across any media they consume & at any stage of the journey. To learn more, please visit thenewcadent.com.

We are seeking a Senior UI Engineer to join our team and take a lead role in architecting, scaling, and building world-class user interfaces. As a senior team member, you will be instrumental in shaping the frontend architecture and setting engineering standards. Your deep expertise in React, Next.js, and TypeScript will directly impact our ability to deliver high-performance, maintainable, and scalable frontend applications.

This is a high-impact role suited for someone with a passion for design systems, performance optimization, and scalable engineering practices. You’ll work closely with cross-functional teams across product, design, and backend engineering to drive our product vision forward.

  • Lead the design and development of complex, high-traffic frontend applications.
  • Architect scalable and modular component libraries and frontend infrastructure.
  • Set best practices around code quality, performance, testing, and accessibility.
  • Collaborate with Product and Design teams to create intuitive and responsive UIs.
  • Mentor junior and mid-level engineers through code reviews, design discussions, and pair programming.
  • Evaluate and recommend tools, technologies, and processes to ensure our frontend stack remains modern and maintainable.
  • Own the delivery lifecycle of new features — from concept to production and optimization.
  • 5+ years of professional experience in frontend development, with at least 2 years in a senior or lead role.
  • Expert-level proficiency in React.js, Next.js, and TypeScript.
  • Proven experience scaling and maintaining large-scale frontend applications.
  • Strong understanding of application architecture patterns (e.g., micro-frontends, SSR/ISR, code-splitting).
  • Deep knowledge of modern CSS techniques (CSS-in-JS, Tailwind, or similar).
  • Experience integrating with RESTful and/or GraphQL APIs.
  • Strong understanding of performance profiling, optimization, and monitoring.
  • Solid experience with testing libraries (e.g., Jest, React Testing Library, Cypress).
  • Familiarity with CI/CD pipelines and modern deployment practices.
  • Excellent communication skills and the ability to work collaboratively in a team environment.

Nice to Have:

  • Experience with design systems and component libraries (Storybook, Figma handoff).
  • Background in accessibility (WCAG standards) and internationalization.
  • Exposure to backend or full-stack development is a plus.
  • Open-source contributions or technical blogging.

So, if the leading edge of media technology is the place you want to be, please contact us today and let’s start the conversation!

Cadent is an Equal Opportunity Employer and is committed to supporting all it’s employees when it comes to Inclusion & Diversity. Cadent’s policy is to provide equal opportunity for applicants & employees without regard to race, color, religion, creed, gender, gender identity or expression, sexual identity or orientation, age, national origin or ancestry, citizenship, disability or medical condition (including pregnancy, childbirth, or related medical condition), sexual and reproductive health decisions, genetic information, marital status (including domestic partnerships and civil unions), pregnancy, culture ancestry, familial or caregiver status, military status, veteran status, socioeconomic status, unemployment status, status as a victim of domestic violence or any other basis prohibited by law. and will not discriminate against the basis of disability. This commitment is honored when it comes to decisions on hiring, recruiting, training, promotions, compensations, benefits, transfers and terminations.

Cadent is seeking to actively engage with our employees from a wide variety of cultures and to connect with our clients differently. Our workforce has generational diversity that supports greater innovation when we maximize representation of all diversity. Our active employee resource groups promote engagement across all groups of individuals that are represented within the company and externally.

Job Tags

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