Zaryab Haider
Senior React Native & Rails Developer — I add AI to existing
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Live healthcare platform: React/Rails web app plus React Native apps on iOS and Android. Since 2020 I've worked across web and mobile: redesigns, API work, new modules and bringing web features to mobile. I built analytics dashboards, a content store for institutions, a Kanban board, document-editing tools and a Slack-style messaging system, and helped ship AI search, a chatbot and AI content creation.
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Field-service platform for pool, lawn and cleaning businesses: a Rails web back office plus technician and homeowner apps.
I rebuilt both React Native (Expo) apps from scratch and shipped them to iOS and Android: route maps, automatic arrival detection, job forms with photos and video, offline sync, in-app payments and tips, in 4 languages.
On the web app I worked across nearly every area: features, bug fixes, redesigns and Stripe Connect payments (each company's own connected account, platform fee).
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Most AI features end in a wall of chat text you can't sort or tap. This app turns plain-English questions ("show my refunded orders, biggest first") into a real mobile screen: a list you can sort, filter and open for details.
The AI only translates the question into a search; the data comes straight from the database, so it can't invent results. Every AI choice is checked in code before it runs. A panel shows what the AI understood, and off-topic or empty queries get clear, separate messages. Cost: under $0.0004 per question.
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Built to demonstrate agents that take real actions, not just answer questions. A customer messages "cancel my subscription" or "refund my last charge". The agent verifies eligibility, calls the right tool against a live Stripe test-mode account, logs the action, and requires confirmation before anything destructive runs. High-risk cases (large refunds, flagged accounts) escalate to a human instead of executing. Cost: ~$X per conversation.
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