Marcel Soubkovsky - Logo

I build interfaces that feel fast and clear

Frontend engineer focused on product UX, performance, and shipped detail across React, Next.js, and TypeScript

portrait of Marcel Soubkovsky

Featured work

Three products that show the kind of interfaces I like to build

Menuit promotional image with a restaurant menu on a smartphone

2025

Menuit

Digital menu platform built for fast restaurant onboarding

ZYNC promotional image showing an in-car entertainment interface at dusk

2023

Mercedes-Benz in-car entertainment app

In-car entertainment interface built for glanceable, low-distraction use

HiPeople promotional image with an AI screening dashboard and high-match score

2024

HiPeople

AI-powered hiring platform for screening, assessments, interviews, and reference checks

Supporting work

More product work, utility tools, and mobile builds

S3PIA promotional CRT computer scene with the S3PIA interface

2026

S3PIA

Dockerized personal AI assistant with memory, terminal access, and cron-like scheduling

Circles promotional image with nearby activities on a smartphone over a soft map

2022

Circles - Social App

Location-based social app concept for planning activities around GPS-aware circles of friends

Stepplr promotional image with goal progress on a smartphone at sunrise

2021

Stepplr - Goal Tracking App

Goal-tracking app that breaks ambitious goals into smaller social steps

Companion promotional image with a mobile CRM agenda on a field-work desk

2021

Companion - Customer Relationship Management App

Mobile CRM app that brought field teams into a desktop-first workflow

Local Comments promotional image with a VS Code editor and local comment sidebar

2020

Local Comments - VS Code Extension

VS Code extension for leaving local comments on code without pushing them to git

Maypak promotional image with a custom case and precision foam packaging

2015

Maypak

WordPress marketing site with a custom front end and easy content editing

Archive / experimental

Older technical work and experiments, kept visible but quieter

Chronos promotional key art with a time-travel globe and interface panels

2025

Chronos

Time-travel game prototype mixing story beats, snapshots, and generated scenes

L-Storage promotional image with a localStorage inspector and TypeScript code

2025

l-storage

Type-safe localStorage wrapper with a built-in way to inspect stored keys

QuizUp promotional image with a quiz builder on a laptop and the QuizUpMe identity

2025

QuizUp

AI quiz generator that turns uploaded content into study sessions

React Pic Gallery promotional image with a responsive grid and lightbox viewer

2021

React Pic Gallery

Lightweight React image gallery with responsive layout, touch support, and accessibility

FD-BPM promotional image with a photonics propagation heatmap and simulation controls

2020

Physics simulation - FD-BPM

Finite-difference beam propagation simulator for photonics research

EasyPlotGUI promotional image with an interactive chart and plotting controls

2019

EasyPlotGUI - Python plotting UI

Type-safe Python plotting UI that reduces boilerplate around interactive charts

Liftoff promotional image with a transparent force-measurement device and lab readout

2018

Liftoff - Force Measurement Device

Force-measurement device for semiconductor extraction research

Multiflow promotional image with a fluid simulation on an engineering monitor

2015

Educational Multiflow Software

Desktop learning tool that made multiflow fluid dynamics easier to explore interactively

About

I like working on products where the quality is visible in the details, and I’m strongest when a team needs someone who can take messy requirements and make the interface feel obvious

Contact

Have a product that needs better UX or sharper frontend execution? Let’s talk