SVIATOSLAV BARBUTSASENIOR FRONTEND ENGINEER · REACT & TYPESCRIPT · FRONTEND ARCHITECTURE · APPLIED AI
I design and ship complex product interfaces, SaaS platforms, real-time systems, and practical AI capabilities from architecture through production.
Field notes: new tech must pay for its own complexity; an AI feature earns its place or it ships out; a friendly UI is an engineering art; every dependency is a debt with interest; a model call is a dependency with moods; evaluation before enthusiasm; design for deletion - change stays cheap; velocity dies quietly, in small couplings; boring where it matters, ambitious where isolated; the demo is not the product; type "help" - this line is real.
route: WAW → client · ttfb 28ms · cache: HIT
01 Product evidence
WORK INDEX →A selection of featured projects bridging product design, system architecture, and production code. Additional work and case studies available upon request.
NDA-PROTECTED
Frontend architecture and hands-on delivery across a multi-application React and Next.js SaaS platform.
Frontend architecture, major implementation, and team mentorship
React / Next.js · TypeScript · Real-time SaaS
PIGGY.EU TODAY
Original loyalty and discount web frontend.
Frontend architecture, shared UI, and technical leadership
React · TypeScript · MobX
Original real-time competition platform.
Original frontend architecture
React · Redux · WebSockets
Sessions, decisions, diagrams, and handoffs for AI coding tools.
Implemented the Tauri app, TypeScript core, and MCP server
TypeScript · Tauri · MCP
Local email agent with cited retrieval and reviewed actions.
Implemented architecture, retrieval, agents, and operator workflow
Python · FastAPI · llama.cpp
PRIVATE RELEASE CANDIDATE
On-device speech correction, explanations, and repeat practice.
Designed and implemented end-to-end
Flutter · whisper.cpp · On-device AI
LIVE CLIENT WEBSITE
Booking site with appliance guides and ZIP coverage.
Architecture, implementation, and delivery
WordPress · PHP · JavaScript
02 Live software
VIEW ALL SOFTWARE →Focused browser tools for image editing, QR creation, generative graphics, and semantic HTML — each independently deployed and available to use.
Seeded line-art ornaments from five motif families, drawn in pure TypeScript; you turn the dials.
Static QR codes composed and encoded in the browser. No redirect, no account, nothing uploaded.
HTML5 element atlas and semantic layout creator. The platform, documented by using it.
Private, in-browser AI cutouts with brush refinement and batch PNG, WebP, or ZIP export.
03 Writing
ALL ARTICLES →Field reports, not think-pieces. Written after shipping, when the trade-offs were already paid for.