Milestone Technologies, Inc. is hiring: [Hiring] Senior UI/UX Developer @Milesto

Job Overview We7re hiring a Senior UI/UX Developer to design and build user interfaces for an AI-first, data-centric platform. Youll own the end-to-end experience for chat/assistive workflows, human-in-the-loop (HITL) approvals , and explainability views (sources, rationales). The ideal candidate blends product sense with strong frontend engineering, accessibility, and design-system rigor-shipping fast, usable, and secure interfaces. Key Responsibilities Product UX & Flow Design: Define user journeys for discovery answer approval action; craft low/high-fidelity prototypes and interaction specs. HITL & Explainability UI: Build approval modals and review panes that summarize intent, scope, impacted systems, and sources/subgraph rationale; ensure clear confirm/reject flows with auditability. Chat & Workspace Interfaces: Implement responsive chat/workbench UI, message streaming, citations, error states, and retries; support role-based views and guardrail feedback. Component Library & Design System: Establish reusable components, tokens, theming, and documentation; maintain consistency, accessibility, and performance across surfaces. Frontend Engineering: Ship production SPAs with robust state/data fetching, routing, optimistic updates, and skeleton/loading patterns. Accessibility & Quality: Enforce WCAG-aligned semantics, keyboard navigation, focus management, and contrast; write unit/e2e tests and visual regressions. Telemetry & Experimentation: Instrument UX metrics (latency, drop-offs), feature flags, and A/B hooks; partner on dashboards for usability and adoption. Collaboration & Delivery: Work with analysts on acceptance criteria, with backend/AI engineers on contracts, and with security on SSO/entitlement UX. Participate in code reviews and release rituals. Required Skills Frontend Stack: Expert in React + TypeScript , modern state/data tools, and routing. Styling & Systems: CSS expertise (Flex/Grid), component libs and utility frameworks (e.g., Tailwind, MUI/Ant), design tokens, theming, and responsive design. API Integration: Strong REST/WebSocket/SSE integration, schema-driven development (OpenAPI/JSON Schema), error handling, and pagination/streaming patterns. Testing & Quality: Jest + React Testing Library, Cypress/Playwright, story-driven development (Storybook or similar), visual regression testing. Security & Auth UX: OIDC/OAuth2 SSO flows, CSRF/XSS mitigations, secure handling of tokens/session state, and role-aware UI controls. Performance: Profiling and optimization (bundle splitting, memoization, virtualization), Core Web Vitals awareness, and perceived-latency improvements. Tooling: Git-based workflows, CI/CD familiarity, lint/format/type-safety discipline; strong documentation and design-handoff skills (Figma). Good to Have Skills Explainability & Data Viz: Charts/tables and graph visualizations (e.g., Recharts, D3, Cytoscape.js/Sigma.js) for sources, subgraphs, and call graphs. AI UX Patterns: Prompt/response UI nuances, citation rendering, safety/guardrail feedback messaging, and evaluation review panels. Design Ops: Design token pipelines, theme packs, multi-brand support, and cross-repo component publishing (Storybook/Nx/Turborepo). Observability: Frontend tracing/metrics (OpenTelemetry JS), UX analytics (Segment/GA4), and event taxonomy design. Feature Delivery: LaunchDarkly/Flagsmith, canary/experimentation hooks, and remote config. This role is ideal for a hands-on developer who can turn complex reasoning and approval workflows into fast, accessible, and trustworthy experiences-while building the component foundations others can reuse. #J-18808-Ljbffr