UX Design Engineer - Agent-First Design Systems & Ops

UX Design Engineer - Agent-First Design Systems & Ops

Department: Software Solutions

Employment Type: Permanent - Full Time

Location: Oxford, UK

We’re building a next-generation design system: semantic tokens, composable primitives, and product-grade patterns that scale across a suite of B2B SaaS experiences in the energy sector. The next step change is that AI agents will increasingly participate in the design and build of software and user interfaces.

This role helps define what “agent-ready” design systems look like while shipping world-class UX for humans today. Your goal is to make great UI repeatable at scale: build a token-driven foundation of primitives that grows into product-grade composites and patterns grounded in real needs while maintaining a high bar for visual craft, accessibility, and interaction quality.

In parallel, you’ll help redefine the end-to-end design process for an agentic era: faster prototyping loops, tighter iteration cycles, and interaction-level refinement powered by automated AI workflows. We’re building the practical scaffolding that makes this scalable and reliable.

Design tokens & theming

• Own a token-first approach: semantic tokens that encode intent (not just values), multi-theme support, and predictable propagation into CSS variables and Tailwind mappings
• Define conventions for naming, layering (core → semantic → component),and change management so teams can adopt incrementally
• Ensure components consume tokens (not hard-coded styles) so overridesand theme changes behave reliably

Primitives & component architecture

• Design and build highly reusable primitives and components with accessibility, state correctness, and interaction quality as default
• Leverage headless UI foundations to ship production-ready components with crisp, maintainable APIs
• Design systems around composition-first principles: small orthogonal building blocks, clear extension points, and patterns that avoid fragmentation (controlled/uncontrolled, slots/compound components, render props where appropriate)

Composites & product patterns

• Build and evolve product-oriented composites and patterns over time (tables, filters, dashboards, workflows), turning repeated needs into stable, documented patterns
• Validate patterns against real constraints: data density, empty/error/loading states, performance, and responsive behaviour
• Visual craft, motion & interaction
• Apply deep CSS expertise to ship refined micro-interactions, transitions, and animations that communicate hierarchy, feedback, and affordance
• Hold a high bar across variants and edge cases; improve quality without adding unnecessary complexity

Process, ops & agent readiness

• Build the workflows that keep iteration fast: prototyping playbooks, tight feedback cycles, and repeatable ways to explore solutions, variants, states, and granular interactions without creating one-off debt
• Define agent-legible representations of components/tokens/states and the guardrails needed for safe recomposition and generation
• Create feedback loops so system changes (both human and agent-made) are observable, comparable, and trustworthy (docs, examples, internal tooling, regression checks)

Collaboration & governance

• Partner with product and engineering on adoption strategy, compatibility, deprecations, and migration paths
• Help define standards for contribution, review, and release discipline; shape the culture and leverage of the design function as it grows

Required attributes:

• Strong React/Type Script fundamentals with proven experience building component libraries/design systems used across teams or products
• Experience applying tailwind CSS in scalable design systems using structured utility patterns, class composition and design tokens
• Skilled at headless UI composition and component API design with accessibility baked in
• High bar for visual quality and interaction design
• Familiarity with agent coding tools (e.g. Claude Code, Codex, Open Code) and emerging AI powered workflow patterns e.g. Spec Driven Development / Plan modes, parallisation using worktrees, multi-agent orchestration, agents.md , skills etc.

Desirable attributes:

• Ex…