Yusuf Y.

Full stack & AI engineer with 5+ years of commercial experience (since 2021). I build web products end to end: React / Next.js / Vue frontends, Node.js and Python backends, LLM features and AI agents (RAG, tool use, MCP), and WordPress / WooCommerce sites. I lead full stack development at a US logistics company and have 25 merged pull requests in Expensify's open-source React Native app. What I can do for you • AI engineering: chat-with-your-documents (RAG) with real citations, AI agents that call your APIs with guardrails and human approval, MCP servers for Claude, evals so you know the AI actually works, Claude / OpenAI API integration • Frontend: React 19, Next.js, Vue 3, Nuxt, TypeScript. Dashboards, admin panels, SaaS and real-time apps • Backend: Node.js and Python (FastAPI) REST APIs, PostgreSQL, auth and role-based access, WebSocket real-time features, job queues, payment and third-party integrations • WordPress: custom themes from Figma, Gutenberg / ACF / Elementor, WooCommerce, speed optimization, bug fixes, plugin conflicts, headless WordPress with Next.js • Existing projects: bug fixing, refactoring, migrations, performance and test coverage AI projects (open source, code on GitHub) • DocuMind: chat with your documents, answers with clickable citations. Next.js 16 + TypeScript, PostgreSQL + pgvector hybrid search (full-text + vector, RRF), local embeddings, streaming Claude answers. Retrieval eval: 100% hit@3 on 20 questions; 77 unit + integration tests and Playwright e2e. • Resolve: AI customer-support agent for an online store. Python, FastAPI, 7 tools (orders, refunds, shipping), refunds over $100 wait for human approval, security rules enforced in code, audit log, MCP server for Claude Desktop / Claude Code. 54 tests + 17 eval scenarios in CI. Client work • Dyzlix: fuel management platform for US trucking fleets. Built from scratch as frontend lead: 1,100+ commits, 320+ unit tests, 17 architecture decision records, zero-downtime releases. • Bot Manager: operations panel for a US fleet company. 41 feature modules, resilient STOMP/WebSocket layer, role-based access, scheduling across US time zones. • Load Up: large React 19 TMS (~3,100 files): live load board, WebRTC calling, virtualized tables and maps for 600+ drivers. • Hunarda: education platform admin panel with admin, teacher and student roles and payments through 5 providers. • Expensify (open source): 25 merged pull requests to a production React Native / React Native Web app. • Backend projects on GitHub: Fastify API gateway with circuit breaker, durable job queue / ETL service, GraphQL API with DataLoader. 250+ automated tests, Docker, CI. Stack • Frontend: React 19, Next.js, Vue 3, Nuxt, TypeScript, TanStack Query, Pinia, Zustand, Tailwind CSS • Backend: Node.js, Express, Fastify, Python, FastAPI, GraphQL, PHP, PostgreSQL, MySQL, SQLite, WebSocket, Docker • AI: Claude API, OpenAI API, RAG, pgvector, embeddings, tool use / function calling, MCP, evals, Claude Code • WordPress: WooCommerce, Gutenberg, ACF, Elementor, custom themes • Quality: Vitest, Jest, Pytest, Playwright, GitHub Actions CI I communicate clearly in English, share progress regularly and deliver code your team can maintain after me. Send me your project details. I'll reply with a clear plan, timeline and price.