Alexander Dr

Co-developed a streaming UI architecture using Next.js and the Vercel AI SDK to render real-time chat interfaces and handle generative UI state. Connected LangChain and LangGraph pipelines for multi-step context retrieval, dynamic query routing, and multi-turn LLM responses. Implemented strict runtime schema validation with Zod for prompt payloads and model outputs to prevent UI crashes from malformed LLM data. Also built and optimized global React components for the Zurich Design System (ZDS), ensuring cross-browser consistency across 40+ international business units. Integrated AI-assisted engineering workflows (Claude Code, GitHub Copilot) to speed up boilerplate creation, refactoring, and test writing (~30%), and introduced automated linting/pre-commit hooks to streamline PR reviews. Led accessibility efforts to meet strict WCAG AA/AAA standards using automated checks and manual NVDA screen-reader testing.

Refactored the core front-end infrastructure, fixing architectural flaws and restructuring modules for proper separation of concerns. Built a custom calendar component to handle dynamic data availability states and multiple view modes. Maintained an interactive indoor mapping feature using D3.js to visualize factory blueprints and track Bluetooth noise-beacon levels in real time. Served as primary technical contact for the client, running demos and managing integration/bug-fix phases.

Owned the front-end architecture as Tech Lead for greenfield development of patient and doctor-facing apps using Angular 16. Guided a junior front-end engineer with code standards and ran code reviews to meet strict delivery deadlines. Built a dynamic onboarding wizard with state persistence to reduce user drop-off during long forms. Implemented core audio features for uploading, visualizing, and playing back patient cough samples using D3.js and Web Audio APIs.