Enable job alerts via email!

Senior UI Architect - AI SaaS Platform - London (Hybrid)

ZipRecruiter

England

On-site

GBP 70,000 - 100,000

Full time

28 days ago

Generate a tailored resume in minutes

Land an interview and earn more. Learn more

Start fresh or import an existing resume

Job summary

A fast-growing international company seeks a Senior UI Architect to lead the design and development of high-performance user interfaces. The role emphasizes collaboration, innovation, and mentorship within a design-led culture focused on creating delightful user experiences. Ideal candidates will have extensive experience with modern web technologies and a strong commitment to quality.

Qualifications

  • 10–15+ years of experience building production-grade UIs.
  • Strong track record in architecting scalable frontend systems.
  • Mastery of UI performance concepts.

Responsibilities

  • Architect performant, low-latency UI systems.
  • Drive collaboration with product designers.
  • Set benchmarks for UI performance.

Skills

TypeScript
React
GraphQL
CSS frameworks
UI performance

Job description

Job Description

About the Role

Stax - Deep Tech Headhunters are partnering with a high-growth international Series A company on a mission to transform the way organisations harness AI for customer support and product operations.

They’re looking for a Senior UI Architect who sits at the intersection of design excellence and engineering. This is a hands-on, systems-level leadership role for someone who doesn’t just ship components—they craft cohesive, elegant, ultra-performant experiences.

You’ll play a defining role in setting the architectural direction for all user-facing surfaces—from fast, reactive dashboards to rich collaborative tools—ensuring interfaces are not only beautiful and intuitive, but also scalable and lightning-fast.

What You’ll Do

  • Architect performant, low-latency UI systems that feel instantaneous and intuitive
  • Elevate the design system with best-in-class standards for simplicity, extensibility, and polish
  • Drive tight collaboration with product designers—translating vision into crisp, low-friction user flows
  • Mentor and uplift engineers across teams on code quality, architecture, and UX craft
  • Set and uphold benchmarks for UI performance (TTI, Lighthouse, bundle sizes, animation fluidity)
  • Lead innovation across complex surfaces like search, timelines, real-time dashboards, and data-dense interfaces
  • Define and enforce front-end best practices, including accessibility, interaction design, and motion principles
  • Partner closely with backend and platform teams to influence API design for optimal UX

You Might Be a Fit If You Have

  • 10–15+ years of experience building production-grade UIs using TypeScript, React, GraphQL, and modern CSS frameworks
  • A strong track record architecting scalable frontend systems and leading large UI projects end-to-end
  • Mastery of UI performance concepts (hydration, layout thrashing, render timing, etc.)
  • Experience evolving design systems at scale—with an eye for consistency, structure, and documentation
  • A design-sensitive approach to development, treating UX as a shared responsibility
  • Bonus: Experience with real-time data, stream-based UIs, or visualization libraries like D3/WebGL
  • Bonus: Familiarity with PLG principles and the UX nuances of high-growth B2B SaaS platforms

Why This Role?

You’ll be joining a deeply design-led culture, where architecture is about crafting user delight—not just technical scalability. This is an opportunity to shape the front-end foundation of a new category-defining platform at the ground level, in an environment that values velocity, quality, and cross-disciplinary collaboration.

Architects here don’t operate in silos. They lead from the front—building, mentoring, and pushing boundaries every day. Stax is proud to represent this opportunity. If you’re a UI leader who’s excited by scale, strategy, and AI-powered innovation, we’d love to hear from you. We welcome applicants from all backgrounds.

Get your free, confidential resume review.
or drag and drop a PDF, DOC, DOCX, ODT, or PAGES file up to 5MB.