Product Engineer · Prague

Jan Vlasatý

I ship the code and I own the problem.

Fifteen years building data-heavy products — city-scale data platforms, LiDAR and 3D tooling, public interactive installations. I run discovery, turn it into a spec, then build the product end to end. At my best where a hard technical domain meets a customer who can’t yet articulate what they need.

Get in touch View work
Jan Vlasatý Prague, CZ Czech · English

Selected work

Live map of Prague with public transport vehicles, coloured by how late they are

2017–2022

Prague Public Transportation Monitoring

Follows up to 5,000 Prague public transport vehicles live, works out how late each one is, and shares it openly for the whole network.

  • TypeScript
  • REST
  • RabbitMQ
  • PostGIS
Source Live
The departure board at Nádraží Zahradní Město, running on data from the Golemio platform

2021

Departure Boards API

The live data behind the departure boards at Prague stops. It started with 20 displays, with hundreds more planned.

  • TypeScript
  • REST
Source
The COVID-19 test site finder on bezpecnost.praha.eu, with filters for region, test type and booking

Public service · Prague

COVID-19 Test Sites

Helped people in Prague find a COVID-19 test site with a free slot: filter by test type and booking, sorted by the nearest available time. It was heavily used during the pandemic.

Live
Prague Live at CAMP: the projection wall with parking, city environment, waste, public transport and sharing services in real time

Data visualisation exhibition · 2019

Prague Live

The city’s live data as moving pictures on five wide-screen projections at CAMP, Prague’s centre for architecture and planning.

  • WebGL
  • Mapbox GL JS
  • Golemio API
Preview Video
A visitor in Neviditelná Tržnice with headphones and the tablet app, by a window over the market halls

Interactive audio walks · 2019–2025

Audiowalk.cz

With Martin Kopeček I build audio walks: a voice in your headphones leads you through real places, on the web or in a mobile app, offline, with map navigation, branching stories and tickets. Eight productions so far for Pomezí, AMU, Korzo Národní and Venuše ve Švehlovce, among them Neviditelná Tržnice, where a tablet senses where you are in the market hall and lets you steer the story.

Live Neviditelná Tržnice
A visitor steering the game from a phone in front of the projected street

Interactive installation · 2020

Building City Street

A game installation at CAMP Prague that visitors play together, each from their own phone.

  • WebSockets
  • P5.js
Video
Cityvizor for Prague 10: budget against actual spending by area, then the latest invoices and contracts

Municipal budget transparency · 2015–2017

Cityvizor

Shows anyone where their town’s money goes. Co-created at the Ministry of Finance, open source, and adopted by dozens of towns.

  • Angular
  • Figma
  • Adobe XD
Source

Experience

  1. 2022 — now

    Software Engineer

    Melown SE · Prague

    I build the software that turns drone and laser scans into 3D models, and the dashboards that make all that data easy to understand.

  2. 2017 — 2022

    UX/UI Designer & Developer

    Operátor ICT · Prague

    I led design and development of Golemio, Prague’s data platform: dashboards and open data for city districts, citizens and anyone who wants to build on it. My work also feeds the digital departure boards at stops around the city.

  3. 2015 — 2017

    Full-Stack Developer

    Ministry of Finance · Prague

    Design and development around open data. I co-created cityvizor.cz, which lets anyone see how their town spends its budget. Dozens of Czech towns have adopted it.

  4. 2010 — now

    Freelancer

    Self-employed

    Data platforms for whole cities, interactive installations, visualisations, web apps and UX, for civic, cultural and tech clients in the Czech Republic and around Europe.

Skills

Backend

  • TypeScript
  • Node.js
  • REST
  • GraphQL
  • WebSockets
  • RabbitMQ
  • Node-RED

Databases

  • PostgreSQL
  • PostGIS
  • MySQL
  • MongoDB
  • Redis

Frontend

  • React
  • Angular
  • Vue
  • TypeScript
  • WebGL
  • Mapbox GL JS
  • P5.js

Design & UX

  • Figma
  • Adobe XD
  • Prototyping
  • User Research
  • Design Systems

Infrastructure

  • Docker
  • Kubernetes
  • CI/CD
  • AWS
  • Azure

Other

  • IoT
  • ESP32
  • Video Production
  • DTP
  • Open Data
  • Smart City

Education

Master’s degree, Biomedical Engineering

Czech Technical University · Prague

2015 — 2017

Bachelor’s degree, Biomedical Technology

Czech Technical University · Prague

2011 — 2015

Hobbies

Musician
Sports enthusiast
Architecture
Product design

Let’s build something together.

jan.vlasaty@hotmail.com
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