Portfolio
Duolingo
As an independent contractor I worked on next-generation education technology that helps millions of people learn on mobile and desktop web.
Responsibilities:
- Collaborated on software projects with product design and backend aspects.
- Developed, released, and maintained web applications.
- Manage individual project priorities, deadlines, and deliverables.
I was one of the most active contributors to the learning app.
For my work on Duocon I received the following review:
[…] Especially for your attention to detail - you caught every single little thing and made sure our landing pages were perfect.
Hello Chef
I received this review from Ahmed Al Akber, CEO of Hello Chef:
Rens was the key figure in a team of developers that built our system from scratch. While he mainly handled front-end, it’s obvious that he has vast experience in all key areas of software development. Rens kept the entire team organized and focused and ultimately we built a very reliable system. If you’re looking for a senior professional to lead on the development of your next complex software project, speak to Rens.
Kubernetes and Docker Swarm with CI/CD
I have set up Kubernetes and Docker Swarm clusters for multiple clients, converting applications to be run in containers, setting up monitoring and centralized logging, configuring replicas, load balancing, and automated zero downtime deployments with a CI/CD pipeline.
Hack Partners
I developed dashboards and data visualizations for rolling stock companies, enabling analysis of speed, fuel consumption, etc. of train carriages.
Other clients
GoSpooky, University of Amsterdam, Bloomon, Forget the Fish, Utrecht University, Kinder Donations, Mobypicture, Locatienet, Brainpact Industrial Automation