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Senior UI/UX Developer at Milestone Technologies, Inc.. Location Information: India. Job Overview. We’re hiring a . Senior UI/UX Developer. to design and build user interfaces for an AI-first, data-centric platform. You’ll 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.