subtle apps ❧

Jakub Roztočil — software engineer
CTO web apps cloud Python JavaScript

Software engineer and technology lead specialised in web applications and cloud technology. Passionate about designing, building & shipping great tech products.

About me

Developed & shipped successful projects ranging from polished web products, to distributed systems, to standalone libraries, extensions, developer tools, and CLI apps — as lead, team member, or sole developer.

Extensive background in tech startups — built & shipped products as part of international tech teams as senior engineer, lead developer, co-founder, and CTO — in San Francisco, London, Copenhagen, Barcelona, and Prague.

Author of popular open source software, such as HTTPie, a CLI HTTP client and one of the most popular Python projects on GitHub, or RRule.js, the most popular JavaScript library for recurrence rules for calendar dates.

Startups

Homewings

2016—2018, London, CTO & Co-Founder

Online interior design platform and marketplace.

Python Django JavaScript React

Pex.com

2014—2015, San Francisco, Full-Stack Developer

Platform to find, track & monetize videos across the web.

Python Django JavaScript Backbone.js

Opbeat (acquired by Elastic)

2013—2014, Copenhagen, Senior Software Engineer

Application performance monitoring platform.

Python Django JavaScript Backbone.js

Edufy

2012—2013, Copenhagen, CTO & Co-Founder

Intelligent scheduling platform for students and universities.

1calendar

2010—2012, Copenhagen, CTO & Co-Founder

Web & mobile calendar and to-do app integrating school, personal and Facebook events.

Education

I am a big believer in continuous self-education through which I acquire most of my skills. Institutionally, the field of my study was Information Science:

  • Charles University in Prague, Czechia (bachelor’s degree)
  • University of Porto, Portugal (ERASMUS programme)
  • Royal School of Library and Information Science / University of Copenhagen, Denmark (Masters programme, incomplete)

Open source

HTTPie

Modern command line HTTP client.

Python HTTP CLI

rrule.js

Recurrence rules for calendar dates as per the iCalendar RFC.

JS TypeScript

Cointrol

Bitcoin trading bot with a real-time dashboard.

Python Tornado Django Postgres Redis JS Backbone.js

CloudTunes

Web-based music player for the cloud.

Python Tornado Redis MongoDB JS Backbone.js

httpcat

Utility for constructing raw HTTP requests on the command line.

Python HTTP CLI

geotagger

Geotag photos based on your smartphone location history data.

Python Flask

podcats

Generates RSS feeds for podcast episodes from local audio files and expose both via a built-in web server.

Python Flask

Consulting

Services
web apps MVPs interim CTO technical adviser Python Django JavaScript React
Communication
English Spanish Czech remote GMT+1

Get in touch