I'm René Weteling,
web enthusias
entrepreneur & joker.

This is obviously still a work in progress.....


About me professionally

So i’m a freelance web enthusiast. Why such a vague job definition? Well that's because my activities are quite diverse. Sometimes i’m a interim-CTO building a great product and an even nicer team and sometimes i'm correcting some small bug somewhere.
My knowledge is quite broad, i've studied computer sciences, worked at multiple companies and tasted a lot of corporate cultures.
Ive founded my company, or went to the Chamber of Commerce about 10 years ago. I was doing some freelance work next to my regular employment and needed to invoice clients. Not to long ago in 2015 ive decided to make the switch to full time freelancing. To be honest the best decision in my life. The whole chain of building something for someone is so exciting and challenging that boredom is something of the past.

Things where i'm really good at are: creating business applications, Single Page Applications, Ruby on Rails apps, React apps, couplings between systems you name it!

What i’d really love to do is creating some React Native mobile apps. So far i've just created demo projects to learn the language. But a real assignment with a stakeholder would be great.


About me personally

So i'm Rene born in ‘86 the time where computers started to get accessible to the public. the time of the Apple Mackintosh the time of the Atari and the Commodore 64. It was a great time to grow to love computers. Back in the day everything was so big you could actually understand what it did by looking at it. A great basis to work with.

So, as you might have noticed i like computers, and they like me (except for windows computers…. we have some strong differences in opinions). I love boats, cars, beers, cafe’s, festivals, techno and off course Amsterdam.

In my spare time i'd love to do some stuff with my family, i've got a beautiful viance Thecla a daughter Lotte (‘13) and a son Boris (‘17). Going on the boat in the summer,


Latest projects


Tankey | Mangrove

Rails api | ActiveAdmin backend | Automated exports

22-01-2018- 27-04-2018

Tankey is a loyalty platform (LP) created by Essent for there other brand EnergieDirect. The fist version of the LP is built within Essent. Meaning that linking other company's proved to be difficult, thats why they have split up Tankey from essent and builind a new and better version of the app.

More info about Tankey here

My role in this project:

  • Build a Rails Api to supply the android and ios clients with data
  • Build an Admin interface where you can see KPI's, export transactions and get insight in what's happening
  • Build a stable and tracable system, with the new GDPR rules we need to track when what concent is given etc.
  • Link the backend to a push notification provider (firebase) so that we can notify our users
  • Talk with the teams to find out what they are building next so that i can suplly the data on forhand
  • Create a discount calculator, and method to stack discounts
  • Link the api to the loyalty partners (Energie direct, and more to come), since you only get a discount when you are linked to a specific loyalty partner.


BotSquad - The simple yet powerful chatbot platform

React - Webpack - Jekyll

16-10-2017- 17-11-2017

With the BotSquad bot, you can create bots for the web, mobile and chat interfaces like facebook, slack, twitter etc. There is a beautiful studio where you can create bots using a friendly and semantic DSL. And preview the bot in real time.

My role in this project: 

  • React coding on the Chat client
  • Creating the API
  • RnD on the bot itself
  • Adding features


The Main Ingredient | Abn Amro

Veiligzondermoeite.nl - an app to create awareness for cybersecurity

04-12-2017- 25-01-2018

Veiligzondermoeite started out as a experiment from ABN Amro to help their cybersecurity office create awareness with clients of ABN Amro. There are alot of cybersecurity treats that are just not preventable with a technical solution like a firewall or password resets. Human engineering is currently quite hot. Just imagine, some hacker hacked the CEO’s email account, then the CEO goes on a well deserved vacation, and then the hacks sends an email to the chief of finance to pay 10K to some IBAN account. This is a case that you can prevent with awareness and that’s why The main ingredient was tasked by ABN Amro to create this app.

My role in this project:

  • Build a Node.js backend to supply the app with content and send Push notifications when new content is added
  • Build a React Native app to create awareness about cybersecurity

Obviously im not the sole force behing this amazing little app, from The Main Ingredient we had a great programmer, really eager to learn and ive learned allot from him. They also have a great designer, i was really impressed with the speed and accuracy that he can execute an idea or feeling into assets. Then TMI itself, it was great working with these guys, they really know how to manage Agile projects and it was fun!


HalloRoos - SNS experiment

Rails - Roos API - Heroku

11-10-2017- 08-11-2017

HalloRoos is a contract alarm platform where users can set alarms for contracts that will expire in the future so that they can switch providers on time. HalloRoos was looking to extend their functionality and needed a developer to help them reach their goals. The subject itself is somewhat sensitive, but it comes down to a pretty selection then order flow with allot of validations and constraints. Each step is communicated to an API provided to store and manage the data.

My role in this project:

  • Build the pages as described in Rails using Slim, Sass, and CoffeeScript
  • Connect the pages to virtual models so that we can apply validations
  • Persist the validated models to the provided API


Revolve Music

CTO - Rails - AWS - CI - rSpec

03-04-2016- 15-09-2017

Revolve Music is a SAAS platform where users (Artists mostly) can create a website, a digital presence in just a few minutes. Connecting to filled content providers like SoundCloud, BandsInTown, LinkedIn, Twitter etc your site is filled with content and you are ready to go.

My role in this project:

  • Clean up and rebuild existing code (the overall quality was very poor and not very robust)
  • Create a Continuous integration environment using CircleCi and AWS container service
  • Creating a global scaling web server setup using: Route53, AWS EC2, AWS EC2 container service, Cloudfront, RDS, S3 and Docker
  • Being responsible for the Technical day2day, building team culture, applying standards, laying out technical roadmaps etc. CTO stuff.



Ask me anything,

Herengracht 504 (unit 2.2)
1017 CB Amsterdam
+316 - 55 128 199

IBAN: NL38 KNAB 0723 0772 82
KvK Rotterdam: 24403159
BTW no: NL1997.22.286.B02