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Kristian Kostadinov

Senior Product Designer / Design Systems & React Front End

Sofia, Bulgaria

Open to senior product design and design engineering roles

kristianweee@gmail.com
linkedin.com/in/kristian-ui

README

The demo login is shared on purpose: the demo runs on invented data, so nothing you do there matters. Where a link says "on request", the client has not cleared the work for publication yet.

design-and-development/

Products I designed and then built, deployed and answer for.

  • Pulse KPI dashboard

    2026

    Fast Track Ltd. Service health, deployments, Sentry and uptime next to GA4, Google Ads, Facebook Ads and Shopify, with an executive board. Front end in React and Vite on shadcn/ui; backend FastAPI serverless on Vercel, built with AI-assisted development.

  • ĒTHA Dosha Quiz

    2026

    Fast Track Ltd, developed with Emami. A 40-question branching quiz scored by AI into a dosha composition, a Dosha Card and a 23-page report by email. I designed it and built the front end in React 19, TypeScript and Tailwind on 14 reusable components. Live with real users since May 2026.

  • ĒTHA shop, academy and ritual pages

    2026

    Custom Liquid sections for the Shopify shop (scroll-video scrubbing, headless QA scripts), custom front-end code on the LearnWorlds academy, three hand-written scroll-driven ritual landers, email templates in Klaviyo and Resend. One type system (Plantin and Brandon Grotesque) across all of it.

  • "Lions" book: landing page, CMS and shop

    Sep-Oct 2026

    Full stack for a Bulgarian book launch. Landing page in Astro 7 and Tailwind 4 with a 3D book, copy edited by the team through Pages CMS. Shop and checkout on Payload CMS 3 with its e-commerce plugin on Next.js: Stripe cards and cash on delivery, three courier integrations, order management and an admin. I also designed the print cover.

  • Lead-generation CRM and outreach system

    2025-2026

    Own venture. Sourcing of B2B contacts, a self-hosted Twenty CRM as the system of record, AI-drafted replies that wait in a Mailroom queue until a human approves them, and a batch sender with an HMAC-chained ledger so nothing sends twice or without approval. Python pipeline, Docker on a Hetzner VPS behind Caddy, about 1,550 tests.

    • crm-demo.the-pink-dot.comdemo

      A demo workspace with invented companies, people, offers and Mailroom drafts in every approval state. It resets every night.

      login
      demo@crm-demo.the-pink-dot.com
      password
      LeadGen-demo-2026
  • ĒTHA QA portal and QA agents

    2026

    A small internal bug portal (plain HTML and JS on Vercel Functions, Neon, Blob storage) plus the Playwright end-to-end suite and the QA agent skills that run against the deployed quiz.

    • internal

      no demo

design-and-design-systems/

Figma files open in the browser with view access and show demo data.

  • GridBit, ADD Bulgaria

    2024-2025

    UX and the design system of a B2B IoT platform for smart street lighting, used by 75% of Bulgarian municipalities; a Windows 11 app for flashing devices; ShellRaven, a QA app for multi-device test runs.

  • Stone Center Group ERP and design system

    2024-2025

    One consolidated design system for the EP System ERP (role-based access, invoicing with shipment tracking, inventory dashboards, AI summaries), an Android TV production-floor display and the Central Auth Hub single sign-on.

  • Opticcom customer app

    2024

    A customer mobile app for an internet provider: bill and scheduled payments across several households, add-ons, FAQ and ticketing. Delivered as a dev-ready Figma file.

  • Visit Bulgaria, Ministry of Tourism

    2025-2026

    Lead designer via Deploee: 80-plus screens, about 350 W3C DTCG design tokens in primitive, semantic and component tiers, and the icon, 31-sound and store-screen handoff kit.

    • on request

      Ministry project, shown with the contractor's permission

  • Freight Management System, Three Stars

    2025

    A B2B portal for COSCO Shipping's agent in Bulgaria, designed as a standalone UI system in Figma: a blue design system with focus, disabled and error states, container and TEU tracking, document upload, invoices, Bulgarian and English.

    • on request

      password-protected Figma

  • Fast Track design systems

    2025-2026

    A React component library documented in Storybook that the team's AI coding agents build from, and a design system of 17 machine-readable rules for AI-generated reports.

    • internal
  • Arete brand

    Nov-Dec 2025

    Brand brief, manifesto, Guidelines V2.0 and the agency brief for an invitation-only wellness concept, plus its website in React 19, TypeScript, Vite and Tailwind.

    • launch pending

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