I am Lasse

Experienced fullstack developer seeking challenging projects

About me

Fullstack developer with over 10 years of experience in planning, architecting and building web and mobile apps (frontend focus).

I provide the technical and business expertise to bring your projects and ideas to life. I have a good eye for UX/UI, I am a good problem solver and strive to write high-quality code (simple, testable and maintainable). I welcome challenges and the possibility to get to know new technologies and people.

When leading teams I value a results over processes, personal responsibility over micro-management and innovation over dictates. I adhere to the principles behind the infamous agile manifesto.

I speak Danish flag Danish, German flag German and English flag English.

đź“ŤLiving between Berlin and Denmark.

(Also interested in more quirky projects with me as partner or fixed price.)


Some of the technologies I utilize:


  • React
  • React Native
  • Redux
  • Immutable
  • Jest/enzyme
  • CSS-in-JS
  • Storybook
  • Webpack
  • PWA
  • Npm
  • Grunt
  • Sass
  • Gimp


  • NodeJS
  • ExpressJS
  • Flask
  • GraphQL
  • MySQL & Postgres
  • Nginx & Apache
  • MongoDB
  • Next.js


  • Javascript (ES6)
  • Typescript
  • Python
  • Php
  • SQL

Beyond this, I have experience with range of other frameworks, libraries, technologies and services, notably: BackboneJS, Bootstrap, Plone CMS, NPM, Websockets, jQuery, Laravel, Linux server configuration and deployment, React Native, Git, Chrome extension development, geospatial data, LeafletJS, Google maps API, Cartodb, Varnish, Memcache, Wordpress, Drupal, responsive first, user experience, Gimp, web accessibility, SEO, Google Analytics, Stripe.


Selected projects I build and/or was part of:

  • Developed and architectured native mobile and web app for the delivery service using React (Native), Typescript, GraphQL and Storybook. Additionally I tutored team mates.
    Customer: alpakas.app
    Url: alpakas.app
  • Developed native mobile app for a crypto bank using React Native, Typescript and GraphQL.
    Customer: nuri.com
    Url: nuri.com
  • Developed Germany's first complete online platform for digital car purchase using ReactJS and related ecosystem. My role was developer/tech lead and almost 2 year duration.
    Customer: hey.car
    Url: hey.car
  • Developed (in team and independently) a ReactJS app using test driven development for a e-learning startup in Berlin.
    Customer: Wonderwerk.co
    Url: wonderwerk.co
  • Embeddable webshop with using ReactJS, Redux, Webpack, Mysql and Flask with a order/product management backend and advanced data export functionality.
    Customer: Danish Ministry of Higher Education and Science.
    Url: Not publicly available.
  • Custom integration between Cartodb and Podio management tool that displays geodata on different maps. Backend build using Laravel and Mysql.
    Customer: The Foundation for Environmental Education.
    Url: fee.global
  • Web app for finding and viewing verdicts build using BackboneJS, Grunt, Mysql, Flask, Elasticsearch and Docker.
    Customer: Danish Environmental Board of Appeal.
    Url: fredninger.dk
  • Co-developed a portal for exploring digitalized images and artifacts from the museum's collection. Build using Express, ES6, Jade, Scss, Angular and Elasticsearch.
    Customer: The National Museum of Denmark.
    Url: natmus.dk
  • Build various frontend functionality and UX combining Angular and geodata for a danish housing startup.
    Customer: Bolighed
    Url: bolighed.dk

Open source

I also developed and maintain various open source projets:

  • Popular package for ES7, React, Redux and React​Native snippets for Sublime Editor (JS & TS).
  • react-collapse-simple: Simple library for collapsing and expanding content with sliding animation (typescript)
  • react-simple-social: Add all social share links through one simple and lightweight React component.
  • npm-react-module: Boilerplate for developing ReactJS modules using Babel.
  • react-pell2: ReactJS wrapper for Pell WYSIWYG text editor for web.
  • flask-reactjs: Flask, ReactJS/Redux and webpack Boilerplate.
  • flask-scaffolding: Flask Scaffolding featuring Python 3.4, SQLALCHEMY, BackboneJS, RequireJS & Sass (Bootstrap 3).
  • deepl-extension: simple Deepl Chrome extension.

Latest personal project

My latest project is gitdude.com (github repository), a developer service that adds code improvements tips as comment on each github commit. It is build with an isomorphic express setup using ReactJS and GraphQL:

Gitdude screenshot