Vilmos Zoltan Kiss

Frontend / Fullstack (React, Node.js)

I go where the problem is.

I help teams turn slow, complex applications into fast, reliable, and easy-to-use products. → Interfaces handling 50K+ records, multi-criteria filtering → Event-driven systems (RabbitMQ, WebSockets) → Config-driven UIs without frontend deploys Worked on systems in enterprise SaaS, healthcare, legal, and energy — often dealing with messy, legacy codebases and turning them into stable, usable products.

📄 View Resume (PDF)

👋 Open to remote roles — contract or full-time. Let’s connect →

What I work on

Legacy & Complex Systems — stabilizing messy, hard to maintain systems
Complex Data Interfaces — filtering, state management for multi-step workflows
Performance Optimization — rendering, caching, API reduction

Core Stack:

React

Next.js

TypeScript

Node.js

PostgreSQL

MongoDB

Tailwind CSS

shadcn/ui

Work Highlights

Built data-heavy React interfaces (1K+ items) with smooth interaction by introducing lazy loading and reducing render load

Delivered configuration-driven UI systems rendering from JSON, enabling new features without frontend code changes

Stabilized RabbitMQ-based messaging under production load, resolving spike-related failures and enabling reliable real-time communication

Optimized filtering across 50K+ records using indexing and aggregation, reducing query times from 5–10s to sub-second

Projects

VI-klinikken

Landing page and reusable React component system for a Norway-based mental health clinic.

Designed scalable React component system reused across multiple page types
Translated Figma designs into production-ready UI with consistent structure
Improved landing page UX, increasing conversion from 1.19% → 1.74%

Tech: Next.js, React, Tailwind CSS, shadcn/ui

VI-klinikken →

Flow Theory Library - Video Platform

Product platform for distributing and monetizing video content from international dance events.

Designed asynchronous video processing and delivery pipeline (FFmpeg, webhooks)
Built secure delivery flow with time-limited access (JWT + email delivery)
Handled real-world challenges of selling and delivering digital content to end users

Tech: React, Next.js, MongoDB, Mailgun, Mux API

Library - Flow Theory Visuals →

Flow Studio - Event Scheduling App

Mobile-first Progressive Web App built for a 4 day dance festival, replacing Excel-based event schedules with real-time updates and personal planning.