Anastasiia Pirus
Senior frontend engineer, building AI-first products.
Front-end developer focused on how people engage with a product, and on the business goals behind it. I came into engineering from financial audit at KPMG, so I think about the customer and the business first and I’m comfortable in regulated, money-handling products.
Over four years I’ve shipped React and React Native apps to production end to end, closing the gap between business needs and technical architecture. Lately building AI-first products and weaving AI through my own work processes.
Based in Toronto. Open to senior frontend roles. Email me or book a call.
Experience
Senior Frontend Developer
CreatorsAGI · Bellevue, WA, USA ·
- On Envoy Studio — CreatorsAGI’s platform for deploying configurable AI agents on clients’ own domains — architected the multi-tenant foundation: per-tenant authentication and onboarding with WorkOS AuthKit, tenant isolation, and dynamic subdomain and custom-domain routing in Next.js, plus a reusable component SDK and design system teams use to compose client-specific experiences.
- Built the generative-UI system at the core of the product: structured AI outputs become modular React components, streamed live to client sites over SSE via an agent-to-UI (A2UI) layer.
- Shipped M’adrono (ai.talmido.org) end to end, prototype to production — an AI lesson-planning assistant live since September 2025, with 25,000+ queries from roughly 850 monthly active users.
- Drove platform performance and Core Web Vitals — cut LCP by about 97% (~6.5s to under 200ms) across 25+ pages, and reduced response latency by about 40%.
Contract Software Developer — Independent
Toronto, Canada ·
- Built the TypeScript/React front end for FormKiQ, an AWS-partnered document platform handling 50M+ documents — REST API integration and file upload/download via S3 presigned URLs.
- Built admin dashboards for mobile game operators, covering analytics plus tools to manage games, schedule live in-game events and configure in-game currencies.
- Built and shipped a React Native app end to end — gesture-based swipe interactions, animation and local state — released on the Google Play Store.
Financial Statement Auditor
KPMG Canada · Baker Tilly Ukraine LLC ·
- Worked daily with sensitive client and financial data — the compliance, identity and risk context that customer onboarding and verification flows are built on.
Stack
AI / LLM
- LLM integration
- Prompt engineering
- Agent tool calling
- Agent-to-UI (A2UI) streaming
- Google Gemini / Vertex AI
- AI-assisted development (Claude Code, Cursor)
Frontend
- React
- Next.js
- React Native
- TypeScript
- Tailwind CSS
- shadcn/ui
- MUI
- Design systems
Languages
- TypeScript
- JavaScript
- SQL
- Python
- HTML
- CSS
Backend & data
- Node.js
- GraphQL
- REST APIs
- PostgreSQL
- Supabase
- Stripe (subscriptions & webhooks)
- WorkOS AuthKit
- Google Cloud (GCP)
Platform & practices
- Git
- Vercel
- Sentry
- Playwright
- CI/CD
- Feature flags
- Core Web Vitals
- End-to-end testing
- Multi-tenant architecture
Education & Writing
Education
- Meta Front-End Developer Professional Certificate
- CS50 — Harvard University
- M.S. Accounting & Taxation — Odesa National Economic University
Writing
My front-end tutorials on React and Next.js have been read more than 100,000 times, covering the App Router, custom loading and error states, responsive navigation and typography setup.