Matthijs Otterloo

Matthijs Otterloo

I'm Matthijs Otterloo. I'm a web and iOS developer. I do freelance work for companies all over the world while building my own companies as well


  • HTML
  • CSS
  • JavaScript
  • PHP
  • MySQL
  • Node.js
  • Swift
  • Obj-c

iOS Developer at Peakfijn

June 2015 - June 2015

When working at Peakfijn my task was to implement design changes / further improve the matching algorithm for their iOS App Yeller.

Graphic Designer at The Next Web

October 2015 - October 2015

When working at The Next Web my task was to create new so called 'canvas ads' (an industry changing way of advertising) for brands such as Huawai and do some development related tasks for an internal project.

iOS Developer at Flitsmeister

June 2016 - August 2016

When working at Flitsmeister my job was to build a prototype for their in-app navigation which was party of their 7.0 release.

Graphic Designer at WeTransfer

April 2016 - May 2016

When working at WeTransfer I was part of the redesign team for the new WeTransfer design (introduced in November 2016), I was involved in design decissions and helped prototyping some of the concepts.

iOS Developer at Kinder Donations

November 2016 - June 2017

When working at Kinder Donations my job was to build their iOS Application in a team with another iOS developer and back-end developers.

Co-Owner at Cycleswap

September 2015 - March 2016

When working at Cycleswap my job was to work on the back-end of the website / app besides my task as Co-founder / one of the CEO's.
Cycleswap has been acquired by Spinlister LLC in March 2016

Customers / Projects

Below you'll find some of my recent customers / projects.

The Block

iOS Development


iOS Development

Charly Cares

iOS Development


React-native development


PHP Development

Fly Cash

iOS Development


PHP Development


iOS Development


iOS Development

What I do

Web development

I can develop high-quality online applications in PHP, HTML/CSS or Node.js.

Mobile development

I can develop high-quailty mobile applications in Swift/Obj-c or in React-native.


Tired of slow loading times on your website? Let me speed-up your website!


Looking for a new database structure? I'll design a new structure for you or refactor your existing structure.

Get in touch

Want to discuss a new project? Need help building a new business or do you want to book me as a speaker on your event? Do not hesitate to contact me.