Front End Software Engineer (React)

Overview Our client is seeking a Senior Front-End Engineer (UI/UX) to transform designs into fast, reliable, production-quality interfaces. You’ll work closely with a product designer, a full-stack developer, a software architect, and AI/ML engineers to deliver cutting-edge user experiences. The primary stack is React on the front end, integrating with .NET Core and Python services, deployed both on-prem and in the cloud. This role owns the UI layer while also shaping and implementing backend API contracts when needed. What You’ll Do Build responsive React UIs from Figma specs and design tokens; contribute patterns to a reusable component library/design system (Storybook, etc.). Collaborate with design on interaction details, motion, and states; provide feasibility and trade-off feedback. Define and integrate APIs with .NET Core and Python services: help design interface contracts, author/maintain OpenAPI specs, generate typed API clients, and contribute lightweight backend endpoints when needed. Visualize AI outputs (detections, thumbnails, annotated images/video) with intuitive UX and real-time updates. Ensure quality and reliability by writing unit/integration/e2e tests (Jest, React Testing Library, Cypress/Playwright), enforcing type safety, and adding client-side telemetry and error handling. Participate in code reviews, CI/CD checks, feature flagging, and on-call rotations for UI issues; optimize bundles and runtime performance. Design : Work with a product designer using Figma, components/variants, tokens, and clickable prototypes. Engineering : Partner with full-stack and architectural teams on API shape, caching, streaming, versioning, and error semantics. AI/ML : Surface model outputs and job states with clear, user-friendly UX. Stakeholders : Demo features, gather feedback, and translate requirements into incremental UI deliverables. Frontend : React (TypeScript), React Router, Vite/Webpack, Storybook, Zustand/Redux (as needed), CSS modules/CSS-in-JS, Tailwind/MUI. Backend (integration only) : .NET Core (C#) and Python services, REST/WebSockets, OpenAPI/Swagger. Nice to Have Experience with Storybook or other design-system stewardship, including theming/tokens at scale. Media-heavy UI development (images/video, canvas/WebGL) or real-time dashboards. SQL proficiency (PostgreSQL/SQL Server) and ORM experience with EF Core or Dapper. Exposure to NoSQL (MongoDB, CosmosDB, DynamoDB). Familiarity with AI/ML product UX, including surfacing model confidence/metadata. Domain knowledge in physical security, automotive, or industrial systems. Seniority level Mid-Senior level Employment type Full-time Job function Engineering, Design, and Strategy/Planning Industries Public Safety, Software Development, and Security and Investigations #J-18808-Ljbffr Peskind Executive Search, Inc.