Klaas Pieter Annema Email & Phone Number

Restart the development of a Rails backend, Swift iOS app and Kotlin/Java Android codebases getting the product back to an MVP usable state.Major contributions:- Added content moderation APIs and UIs- Implemented the new design system in iOS- Added sound post-processing to boost spoken audio messages- Debugged an issue that prevented hypes from playing under specific circumstances on iOS- Changed the authentication flow to support users without US/CA phone numbers- Collaborate with CEO and CTO to determine and build MVP and MMP (minimal marketable product)

- Built preroll video ads for non paid users which required a rearchitecting of how games start- Finalized partner pages (puzzmo.com/+/polygon) giving marketing control over partner colors/logo placement/back button and more.- Improved ad impressions by fixing issues that prevented ads from showing- Implemented an API and frontend for a weather.com widget on the today page

Remote

I was responsible for bringing Sketch back to the Mac App Store. I added the ability to sign up and subscribe directly from the Mac app while maintaining compatibility with existing subscription and licensing flows.

I led a team of frontend, backend developers and designers on the onboardingteam. As well as supporting the business-side of things (SSO, invoice billing, etc) we also shipped twofactor authentication.

Remote

I worked on the Sketch web app taking it from an app that could display images of your Sketchdocument to the app that allows users to inspect designs, export assets, share feedback, manageusers, and invite guests.Some of my contributions:- built the first version of the sign up and payment flow- contributed to the web inspector with a focus on layer measurements and later color variables- took over the project from an agency and was part of scaling the team and project to 20+ developers.

Remote

I help build and maintain the Swift 4 iOS app and our React based web apps. Being the only person outside of the US I helped define minimal processes that allow us to work effectively despite a 9 hour time difference and hardly any overlap.

Remote

At thoughtbot I worked on Swift iOS apps for clients and built Courier. A service to make push notifications easier. Courier was built using Ruby, on Rails and Swift.

New York

I helped built Karma, a nationwide mobile provider giving you internet wherever you go. I started as front-end/full stack developer eventually moving on to leading the iOS and Android apps.

New York

- Develop Cappuccino front-end for Enstore- Develop AppEngine Python back-end for Enstore- Develop Enstore node toolchain- Develop Enstore Designer Mac application- Official maintainer of the Cappuccino open source project

- Develop Cappuccino front-end for Enstore- Develop Enstore node toolchain- Develop Enstore Designer mac application- Support designers with Javascript development- Official maintainer of the Cappuccino open source project

- Develop AppEngine backend for Enstore- General support for Versions (http://versionsapp.com)- Support designers with Javascript development

- Develop framework to handle creditcard transactions- Develop iPhone application to handle creditcard transactions

Develop content delivery prototype using infinite zooming

Research the capabilities of open-source in a educational environment.

Bachelor, Computer Sciences

Information Sciences

Mbo, Ict